Render admin page errors in the normal layout (closes #382)

Every 400, 403, 404 and 500 on an admin page now answers with an
error page in the normal layout: one fixed line for the status and a
link back to the webhook list, or to sign-in when nobody is signed
in. The router's handler for unknown paths, the CSRF middleware's
refusal and a panic in an admin page route group use the same page;
each such group has its own recoverer and error reporting for that.
The page always sends Cache-Control: no-store. Status codes are
unchanged. The receiver, the healthcheck and /metrics keep their
plain answers. If the error page cannot render, or panics, the answer
is the same status in plain text.

Model: opus-5-5

README.md

@@ -7,7 +7,7 @@ services, durably stores them, and delivers them to configured targets
 with retry support, logging, and observability. Category: infrastructure
 / web service. License: MIT.
 
-Each entrypoint is a version 4 UUID served at `/h/{uuid}`, and
+Each entrypoint is a version 4 UUID served at `/webhook/{uuid}`, and
 that UUID is the entrypoint's only credential. webhooker does not use
 shared secrets, HMAC signatures or token headers on the receiver, and
 will not add them — read
@@ -142,7 +142,7 @@ TTY detection, and security headers are always applied.
 | `RETENTION_SWEEP_INTERVAL` | How often the retention reaper and archive sweeper run (Go duration, must be positive) | `1h` |
 | `SESSION_IDLE_TIMEOUT`  | Idle session timeout (Go duration)  | `24h`    |
 | `RECEIVER_RATE_LIMIT`   | Receiver requests/minute per IP per entrypoint (10x that per IP across the route) | `120` |
-| `TRUSTED_PROXIES`       | CIDRs whose forwarded headers are trusted (unset: all clients behind a proxy share one rate-limit bucket; a correct login password is never throttled either way) | `""` (none) |
+| `TRUSTED_PROXIES`       | CIDRs whose forwarded headers are trusted. A set value replaces the default. If any client can reach webhooker, or the proxy in front of it, from an RFC 1918 source address, set it to the proxy's address alone. See [Trusted proxies](#trusted-proxies) | `10.0.0.0/8,172.16.0.0/12,192.168.0.0/16` (RFC 1918) |
 | `ALLOWED_EGRESS_CIDRS`  | CIDRs that delivery targets may reach despite the SSRF blocklist. Read [Allowing egress to your own network](#allowing-egress-to-your-own-network) before setting it | `""` (none) |
 
 #### Allowing egress to your own network
@@ -389,41 +389,37 @@ unlocked.
 `TRUSTED_PROXIES` is a comma-separated list of CIDR blocks (a bare
 address such as `192.168.1.7` is accepted and treated as a single
 host), for example `192.168.1.7, 2001:db8::5`. It decides whose
-`X-Forwarded-For` header the rate limiters believe, so it should name
-the addresses of your reverse proxies and nothing else.
+`X-Forwarded-For` header the rate limiters believe, so it should cover
+the addresses of your reverse proxies.
 
 `X-Forwarded-For` is honoured **only** when the connecting peer is
 inside one of these blocks; for every other peer the client identity is
-the connection's own address and the header is ignored. The default is
-the empty list, which trusts nobody — anything else would let any
-client pick its own rate limit bucket, minting a fresh one per request
-or draining someone else's. Set it to the address of your reverse
-proxy, and to nothing wider. A set but unparseable value aborts
-startup.
+the connection's own address and the header is ignored. Unset (or
+empty), the list is the RFC 1918 private ranges: `10.0.0.0/8`,
+`172.16.0.0/12` and `192.168.0.0/16`. A set value replaces the default
+entirely. A set but unparseable value aborts startup.
 
-That default is safe against forged headers, but leaving it unset in
-production has a cost you must know about. Production runs behind a
-TLS-terminating reverse proxy, so with `TRUSTED_PROXIES` unset every
-request keys on the proxy's own address and all clients share a single
-bucket per limit. The receiver limits become service-wide ceilings,
-and the login endpoint's failure counting collapses onto one key, so a
-stranger's wrong passwords throttle every other client's wrong
-passwords.
+If any client can reach webhooker, or the proxy in front of it, from an
+RFC 1918 source address (directly, or through anything that can
+rewrite source addresses, such as NAT or a published container port),
+set `TRUSTED_PROXIES` to the proxy's address alone, or every rate
+limit, the webhook receiver's included, can be bypassed by those
+clients. The address to set is the `remoteIP` field of the
+`http request` log line for a request that came through the proxy.
+
+Behind a proxy the list does not cover, every request keys on the
+proxy's own address and all clients share a single bucket per limit.
+The receiver limits become service-wide ceilings, and the login
+endpoint's failure counting collapses onto one key, so a stranger's
+wrong passwords throttle every other client's wrong passwords. Set
+`TRUSTED_PROXIES` to that proxy's address to restore per-client
+buckets.
 
 What it cannot do is lock the operator out. The login endpoint
 verifies credentials **before** it consults any limit and charges only
 failures, so a correct password is never throttled no matter how full
 the bucket is. See [Rate Limiting](#rate-limiting).
 
-The remedy is to set `TRUSTED_PROXIES` to your reverse proxy's
-address, which restores per-client buckets. webhooker logs a warning
-at startup whenever `TRUSTED_PROXIES` is empty, in every environment,
-because behind a proxy every client shares one bucket in `dev` and
-`prod` alike. The warning is informational when nothing proxies to the
-process: with no proxy in front, the peer address is the client's own
-and the buckets are already per-client. See
-[Rate Limiting](#rate-limiting) for what each limit shares.
-
 `X-Real-IP` and `True-Client-IP` are **never** read, from any peer.
 Reverse proxies append to `X-Forwarded-For` but forward other client
 headers verbatim, so a single-valued header is client-controlled even
@@ -439,20 +435,10 @@ instead, since past such an entry the chain is not the shape assumed
 here. The peer address is likewise used when the header is absent or
 every hop in it is a trusted proxy.
 
-Two operator requirements follow:
-
-- Your proxy must **append** the peer address to `X-Forwarded-For`
-  (nginx `$proxy_add_x_forwarded_for`, HAProxy `option forwardfor`,
-  Caddy and AWS ALB by default), and must append a bare address with
-  no port.
-- List proxy hosts **only**. Any address inside `TRUSTED_PROXIES`
-  chooses its own rate-limit key: its `X-Forwarded-For` is walked, so
-  it can name a different address on every request to get a fresh
-  bucket each time, or name another client's address to drain that
-  client's bucket. Never list a block that also covers clients — a
-  broad `10.0.0.0/8` on a network where clients live in the same range
-  makes all three limits, including the unauthenticated webhook
-  receiver, silently bypassable by every client in the block.
+Your proxy must therefore **append** the peer address to
+`X-Forwarded-For` (nginx `$proxy_add_x_forwarded_for`, HAProxy
+`option forwardfor`, Caddy and AWS ALB by default), and must append a
+bare address with no port.
 
 #### Sessions
 
@@ -751,10 +737,15 @@ repository's `Dockerfile` and runs it. The app needs:
 - **Volume:** one host directory mounted at `/var/lib/webhooker`.
 - **Environment variables:**
     - `WEBHOOKER_ENVIRONMENT=prod`
-    - `TRUSTED_PROXIES`: your reverse proxy's address on that Docker
-      network. The `remoteIP` field of the `http request` log line for a
-      request that came through the proxy shows it; the health check's
-      own lines show `::1`. See [Trusted proxies](#trusted-proxies).
+    - `TRUSTED_PROXIES`: unset, it is the RFC 1918 ranges. Set it to
+      your reverse proxy's address alone if that address is outside
+      those ranges, or if any client can reach webhooker, or the proxy,
+      from an RFC 1918 source address (directly, or through anything
+      that can rewrite source addresses, such as NAT or a published
+      container port). The `remoteIP` field of the `http request` log
+      line for a request that came through the proxy shows that
+      address; the health check's own lines show `::1`. See
+      [Trusted proxies](#trusted-proxies).
     - Leave `BIND_ADDRESS` and `DATA_DIR` unset: the image sets
       `BIND_ADDRESS` to `0.0.0.0`, and `DATA_DIR` defaults to
       `/var/lib/webhooker`.
@@ -817,12 +808,16 @@ reports.
    behind a proxy means the `X-Forwarded-Proto` header. The block below
    sets it; without it every request is read as plaintext and cookies
    ship without `Secure`. See [Configuration](#configuration).
-3. **Set `TRUSTED_PROXIES` to the proxy's address.** Unset, every rate
-   limiter keys on the connecting peer, which behind a proxy is the
-   proxy on every request: all clients collapse into one global bucket
-   per limit and the receiver's per-IP limits become service-wide
-   ceilings. See [Trusted proxies](#trusted-proxies). List the proxy
-   and nothing else.
+3. **Make sure `TRUSTED_PROXIES` covers the proxy's address.** For a
+   proxy it does not cover, every rate limiter keys on the proxy, so
+   all clients share one bucket per limit. Unset, the list is the RFC
+   1918 ranges, which do not cover a proxy that reaches the binary
+   itself over loopback (the binary bound to `127.0.0.1`). With the
+   image, the address to check is the `remoteIP` field of the
+   `http request` log line for a request that came through the proxy.
+   If any client can reach webhooker, or the proxy, from an RFC 1918
+   source address, set the list to the proxy's address alone. See
+   [Trusted proxies](#trusted-proxies).
 4. **Send `Host` as `$http_host`, not `$host`.** `$host` strips the
    port. webhooker's Origin/Referer check compares against the host it
    was given, so on any port other than 443 `$host` makes every form
@@ -1193,7 +1188,7 @@ backups at rest and restrict who can read them.
 
 **The entrypoint UUID is the credential, and it is the only one.**
 webhooker mints a version 4 UUID per entrypoint and serves it at
-`/h/{uuid}`. Possession of that URL is the authentication:
+`/webhook/{uuid}`. Possession of that URL is the authentication:
 anyone who holds it can submit events to the entrypoint, and the
 receiver verifies nothing else about the sender.
 
@@ -1375,10 +1370,11 @@ It uses:
 - **[go-chi/httprate](https://github.com/go-chi/httprate)** for
   sliding-window rate limiting of the password-change and webhook
   receiver endpoints. The bucket is per client IP only when
-  `TRUSTED_PROXIES` names the reverse proxy; unset, every client
-  behind that proxy shares one bucket per limit. The login endpoint
-  counts failed attempts itself instead, so that a correct password is
-  never throttled (see [Rate Limiting](#rate-limiting))
+  `TRUSTED_PROXIES` covers the reverse proxy (by default it covers the
+  RFC 1918 private ranges); otherwise every client behind that proxy
+  shares one bucket per limit. The login endpoint counts failed
+  attempts itself instead, so that a correct password is never
+  throttled (see [Rate Limiting](#rate-limiting))
 - **[Prometheus](https://prometheus.io)** for metrics, served at
   `/metrics` behind basic auth
 - **[Sentry](https://sentry.io)** for optional error reporting
@@ -1527,7 +1523,7 @@ the full request and creates an Event.
 | -------------- | ------- | ----------- |
 | `id`           | UUID    | Primary key |
 | `webhook_id`   | UUID    | Foreign key → Webhook |
-| `path`         | string  | Unique bare UUID, generated at creation. The `/h/` prefix is route only and is not stored: the receiver matches this column against the raw `{uuid}` path segment. It is also the entrypoint's credential; see [The entrypoint URL is the authentication secret](#the-entrypoint-url-is-the-authentication-secret) |
+| `path`         | string  | Unique bare UUID, generated at creation. The `/webhook/` prefix is route only and is not stored: the receiver matches this column against the raw `{uuid}` path segment. It is also the entrypoint's credential; see [The entrypoint URL is the authentication secret](#the-entrypoint-url-is-the-authentication-secret) |
 | `description`  | string  | Optional description |
 | `active`       | boolean | Whether this entrypoint accepts events (default: true) |
 
@@ -1909,7 +1905,7 @@ runtime, though CGO is required at build time due to the transitive
 ```
 External Service
        │
-       │  POST /h/{uuid}
+       │  POST /webhook/{uuid}
        ▼
 ┌─────────────┐     ┌──────────────┐     ┌──────────────┐
 │  chi Router │────►│  Middleware   │────►│   Webhook    │
@@ -2135,7 +2131,7 @@ The middleware records three more on the same registry:
 Two of those labels are written once per request from bytes the client
 chose, so both are bounded to something this service registers:
 
-- `handler` is the chi route pattern — `/h/{uuid}`, never the
+- `handler` is the chi route pattern — `/webhook/{uuid}`, never the
   concrete path. A request matching no route carries `(unmatched)`,
   and no entrypoint UUID ever reaches a label.
 - `method` is the request method when the router can route it, and
@@ -2165,7 +2161,7 @@ unpredictable rates, and blanket limits shared with other routes would
 cause legitimate deliveries to be dropped.
 
 The receiver instead has its own dedicated abuse limit, scoped to the
-`/h/{uuid}` route only and keyed per client IP per request path
+`/webhook/{uuid}` route only and keyed per client IP per request path
 (`httprate.KeyByEndpoint`): one misbehaving sender is throttled without
 affecting other senders of the same entrypoint or the same sender's
 other entrypoints. Keying on the path rather than on the entrypoint
@@ -2202,7 +2198,7 @@ log spends. The access log is bounded by neither limit: every request
 is recorded once at `INFO`, served or rejected alike.
 
 What the access log does bound is the _content_ of those lines. A 3xx
-or 4xx response logs the chi route pattern — `/h/{uuid}`,
+or 4xx response logs the chi route pattern — `/webhook/{uuid}`,
 `/user/{username}//`, or the literal `(unmatched)` when the request hit
 no route at all — in place of the concrete URL. Those are the outcomes
 an unauthenticated client can drive for free: 404 and 429 on any
@@ -2236,12 +2232,12 @@ reduces the headers to a fixed allowlist — `Accept`, `Content-Length`,
 
 The same hook rewrites the request URL. The SDK builds it as
 `scheme://host/path` from the concrete path, which on the receiver
-route is `/h/<uuid>` in full — and that UUID is a write
+route is `/webhook/<uuid>` in full — and that UUID is a write
 capability, not an identifier: anyone holding it can post events this
 service accepts and its targets then deliver. A tracker has its own
 retention, access control and deletion policy, so the rule the access
 log follows above does not carry across that boundary. What is sent is
-the chi route pattern instead: `http://host/h/{uuid}`.
+the chi route pattern instead: `http://host/webhook/{uuid}`.
 
 The scheme and the host are kept, and everything else in the URL is
 discarded rather than edited, so a future SDK version that starts
@@ -2285,8 +2281,8 @@ fallback is never the concrete path. The path becomes the literal
 rewrite cannot parse into a scheme is withheld whole. A transaction
 event additionally carries the SDK's own `METHOD /path` name, built
 from the concrete path as well; it is rewritten on the same terms, to
-`POST /h/{uuid}` where the pattern is known and `POST /(redacted)`
-where it is not.
+`POST /webhook/{uuid}` where the pattern is known and `POST
+/(redacted)` where it is not.
 
 The headers are an allowlist for the same reason the rules above are
 unconditional: the SDK's own filter removes four names and passes
@@ -2421,7 +2417,7 @@ logger printed the fully interpolated SQL — parameters and all — to
 standard output on every statement that returned an error, including a
 plain record-not-found, at a level no operator setting reached. Two of
 this service's lookups miss by design on unauthenticated routes: the
-entrypoint lookup behind `/h/{uuid}` and the user lookup behind
+entrypoint lookup behind `/webhook/{uuid}` and the user lookup behind
 the login form, whose path segment and submitted username the client
 picks outright. Every
 `gorm.Open` in the service now installs the adapter in
@@ -2549,47 +2545,44 @@ the tree is checked out: four checkouts have reported 3,959, 3,961,
 client-supplied field was cut, and that the shipped chain's stack
 arrived uncut — never the numbers.
 
-Every limiter here — receiver, login, and password change — identifies
-the client the same way, through one shared key function: the
-connection's own address, unless the peer is listed in
-`TRUSTED_PROXIES`, in which case the forwarded client address is used
-instead. That address becomes a bucket by family: IPv4 keys on the full
-address, IPv6 on its `/64` prefix. A routed `/64` is the normal
+Every limiter here — receiver, login, password change, delivery replay
+and event resubmit — identifies the client the same way, through one
+shared key function: the connection's own address, unless the peer is
+inside `TRUSTED_PROXIES`, in which case the forwarded client address is
+used instead. That address becomes a bucket by family: IPv4 keys on
+the full address, IPv6 on its `/64` prefix. A routed `/64` is the normal
 residential and mobile IPv6 allocation, so keying IPv6 per address would
 let one subscriber rotate source addresses and mint a fresh bucket per
 request, evading these limits at the network layer without spoofing
 anything; the cost is that distinct clients inside one `/64` share a
 bucket. IPv4-mapped addresses (`::ffff:1.2.3.4`) key as the IPv4 address
-they carry. See [Trusted proxies](#trusted-proxies). Deployed without that
-variable set, a client behind a reverse proxy shares one bucket with
-every other client behind the same proxy. Set `TRUSTED_PROXIES` to the
-proxy's address to get per-client limits back. What the shared bucket
+they carry. See [Trusted proxies](#trusted-proxies). When that variable
+does not cover the reverse proxy, a client behind it shares one bucket
+with every other client behind the same proxy. Set `TRUSTED_PROXIES` to
+the proxy's address to get per-client limits back. What the shared bucket
 costs is not the same for every limiter, and the two cases pull in
 opposite directions:
 
 - For the **receiver** limits it costs throughput, which is the safe
   direction to be wrong in: sharing can only make a limit bind sooner,
   never let a sender past it. It matters more for the aggregate limit
-  than for the per-entrypoint one: with `TRUSTED_PROXIES` unset behind
-  the reverse proxy a production deployment is required to run behind,
-  every request keys on the proxy, so the aggregate limit becomes a
-  service-wide ceiling of 1200 requests per minute across all senders
-  and all entrypoints, where the per-entrypoint limit's capacity still
-  grows with the number of entrypoints. Any deployment with more than a
-  handful of busy entrypoints must set `TRUSTED_PROXIES`.
+  than for the per-entrypoint one: with every request keyed on the
+  proxy, the aggregate limit becomes a service-wide ceiling of 1200
+  requests per minute across all senders and all entrypoints, where the
+  per-entrypoint limit's capacity still grows with the number of
+  entrypoints.
 - For the **login and password-change** limits it costs precision, not
   availability. Login failures from every client land in one counter,
   so a stranger's wrong passwords make the operator's own wrong
   passwords answer `429` sooner; the operator's _correct_ password is
-  never affected, because it is never counted. Production deployments
-  should still set `TRUSTED_PROXIES`; webhooker warns at startup
-  whenever it is empty, in any environment.
+  never affected, because it is never counted.
 
 #### The login endpoint
 
 The login `POST` is the one endpoint with no pre-emptive limiter in
 front of it, and that is deliberate. A limiter that spends budget on
-arrival is a lockout in this deployment shape: sharing one bucket, a
+arrival is a lockout wherever clients share one bucket, as they do
+behind a reverse proxy that `TRUSTED_PROXIES` does not cover: a
 stranger sending five POSTs a minute — about 0.08 requests per second,
 from anywhere — keeps it permanently full, and the operator has no
 second administrative path. So the handler inverts the order:
@@ -2686,8 +2679,10 @@ re-fills both verification slots on its first two requests. The
 remedies are to block the source at the reverse proxy, or to
 rate-limit `POST /pages/login` there — the one place a limit can be
 applied without reintroducing the lockout, because the proxy sees the
-real client address. Setting `TRUSTED_PROXIES` does not stop the
-saturation, but it makes the source visible in the failure logs.
+real client address. `TRUSTED_PROXIES` does not stop the saturation.
+The flood's source is in the proxy's access log: webhooker's own logs
+record the proxy's address, not the client's (see
+[Deployment behind a reverse proxy](#deployment-behind-a-reverse-proxy)).
 
 Finer-grained per-webhook rate limits (configured in the web UI and
 enforced in the webhook handler) can layer on top of this env-level
@@ -2699,10 +2694,10 @@ abuse limit later; they are tracked as future work.
 
 | Method | Path                        | Description |
 | ------ | --------------------------- | ----------- |
-| `GET`  | `/`                         | Root redirect, 303 (authenticated → `/hooks`, unauthenticated → `/pages/login`) |
+| `GET`  | `/`                         | Root redirect, 303 (authenticated → `/sources`, unauthenticated → `/pages/login`) |
 | `GET`  | `/.well-known/healthcheck`  | Health check (JSON: `status`, `now`, `uptimeSeconds`, `uptimeHuman`, `version`, `appname`, `maintenanceMode`) |
 | `GET`, `HEAD` | `/s/*`              | Static file serving (embedded CSS, JS). `GET` and `HEAD` only — `POST`, `PUT`, `PATCH`, `DELETE`, `OPTIONS`, `TRACE` and `CONNECT` are answered `405 Method Not Allowed` with `Allow: GET, HEAD`. Any other method (such as `PROPFIND`) is refused by chi before it reaches this route, and gets `405` without an `Allow` header. Pinned by `TestStaticServesOnlyGetAndHead` |
-| `POST` | `/h/{uuid}`                 | Webhook receiver endpoint. `POST` only — every other method is answered `405 Method Not Allowed` with `Allow: POST`. Rate limited (see [Rate Limiting](#rate-limiting)) |
+| `POST` | `/webhook/{uuid}`           | Webhook receiver endpoint. `POST` only — every other method is answered `405 Method Not Allowed` with `Allow: POST`. Rate limited (see [Rate Limiting](#rate-limiting)) |
 
 #### Authentication Endpoints
 
@@ -2718,25 +2713,25 @@ abuse limit later; they are tracked as future work.
 | ------ | ------------------------ | ----------- |
 | `GET`  | `/user/{username}`       | User profile page |
 | `POST` | `/user/{username}/password` | Change the user's password (5 per minute per bucket, then `429`; `503` if no verification slot frees up within 5s, or immediately if 16 requests are already queued for one) |
-| `GET`  | `/hooks`                 | List user's webhooks |
-| `GET`  | `/hooks/new`             | Create webhook form |
-| `POST` | `/hooks/new`             | Create webhook submission |
-| `GET`  | `/hook/{id}`             | Webhook detail view |
-| `GET`  | `/hook/{id}/edit`        | Edit webhook form |
-| `POST` | `/hook/{id}/edit`        | Edit webhook submission |
-| `POST` | `/hook/{id}/delete`      | Delete webhook |
-| `GET`  | `/hook/{id}/events`      | Full Event Log |
-| `GET`  | `/hook/{id}/events/{eventID}/body` | Download an event's full stored body. The log page renders each body only up to its cap, so this is the only route that serves a whole one; it is offered wherever a body is shown truncated |
-| `POST` | `/hook/{id}/deliveries/{deliveryID}/replay` | Replay a finished delivery: creates a new delivery for the same event against the target's current configuration (30 per minute per bucket, then `429`) |
-| `POST` | `/hook/{id}/events/{eventID}/resubmit` | Resubmit a stored event: creates a new event copying it and fans that out to every currently active target (30 per minute per bucket, then `429`) |
-| `POST` | `/hook/{id}/entrypoints` | Add entrypoint to webhook |
-| `POST` | `/hook/{id}/entrypoints/{entrypointID}/delete` | Delete an entrypoint |
-| `POST` | `/hook/{id}/entrypoints/{entrypointID}/toggle` | Enable or disable an entrypoint |
-| `POST` | `/hook/{id}/targets`     | Add target to webhook |
-| `GET`  | `/hook/{id}/targets/{targetID}/edit` | Edit target form. The one page that renders a target's destination URL and header values in full, rather than masked |
-| `POST` | `/hook/{id}/targets/{targetID}/edit` | Edit target submission |
-| `POST` | `/hook/{id}/targets/{targetID}/delete` | Delete a target |
-| `POST` | `/hook/{id}/targets/{targetID}/toggle` | Enable or disable a target |
+| `GET`  | `/sources`               | List user's webhooks |
+| `GET`  | `/sources/new`           | Create webhook form |
+| `POST` | `/sources/new`           | Create webhook submission |
+| `GET`  | `/source/{id}`           | Webhook detail view |
+| `GET`  | `/source/{id}/edit`      | Edit webhook form |
+| `POST` | `/source/{id}/edit`      | Edit webhook submission |
+| `POST` | `/source/{id}/delete`    | Delete webhook |
+| `GET`  | `/source/{id}/logs`      | Webhook event logs |
+| `GET`  | `/source/{id}/logs/{eventID}/body` | Download an event's full stored body. The log page renders each body only up to its cap, so this is the only route that serves a whole one; it is offered wherever a body is shown truncated |
+| `POST` | `/source/{id}/deliveries/{deliveryID}/replay` | Replay a finished delivery: creates a new delivery for the same event against the target's current configuration (30 per minute per bucket, then `429`) |
+| `POST` | `/source/{id}/events/{eventID}/resubmit` | Resubmit a stored event: creates a new event copying it and fans that out to every currently active target (30 per minute per bucket, then `429`) |
+| `POST` | `/source/{id}/entrypoints` | Add entrypoint to webhook |
+| `POST` | `/source/{id}/entrypoints/{entrypointID}/delete` | Delete an entrypoint |
+| `POST` | `/source/{id}/entrypoints/{entrypointID}/toggle` | Enable or disable an entrypoint |
+| `POST` | `/source/{id}/targets`   | Add target to webhook |
+| `GET`  | `/source/{id}/targets/{targetID}/edit` | Edit target form. The one page that renders a target's destination URL and header values in full, rather than masked |
+| `POST` | `/source/{id}/targets/{targetID}/edit` | Edit target submission |
+| `POST` | `/source/{id}/targets/{targetID}/delete` | Delete a target |
+| `POST` | `/source/{id}/targets/{targetID}/toggle` | Enable or disable a target |
 
 #### Infrastructure Endpoints
 
@@ -2937,8 +2932,8 @@ local record instead of nothing. What that placement gives up is
 recovery of a panic in the six entries above it, none of which does
 more than set a header or start a timer.
 
-Additionally, form endpoints (`/pages`, `/user/*`, `/hooks`,
-`/hook/*`) apply a **MaxBodySize** middleware that limits
+Additionally, form endpoints (`/pages`, `/user/*`, `/sources`,
+`/source/*`) apply a **MaxBodySize** middleware that limits
 POST/PUT/PATCH request bodies to 1 MB. It is registered ahead of the
 CSRF middleware in every one of those route groups, because
 gorilla/csrf parses the form; if the cap were installed after it, form
@@ -2962,7 +2957,7 @@ Those same four route groups then apply **CSRF** and **NoCache**
 `/pages` applies **RequireAuth**. The rate limiters are per-route
 rather than global: **PasswordChangeRateLimit** on
 `/user/{username}/password` and **ReceiverRateLimit** on
-`/h/{uuid}`. There is deliberately none on `/pages/login` — that
+`/webhook/{uuid}`. There is deliberately none on `/pages/login` — that
 endpoint counts failures inside the handler, after the credential
 check, see [The login endpoint](#the-login-endpoint).
 
@@ -3003,8 +2998,8 @@ check, see [The login endpoint](#the-login-endpoint).
   by middleware that runs before CSRF parses the form
 - **CSRF protection** via [gorilla/csrf](https://github.com/gorilla/csrf)
   on all state-changing forms (cookie-based double-submit tokens with
-  HMAC authentication). Applied to `/pages`, `/hooks`, `/hook`, and
-  `/user` routes. Excluded from `/h` (inbound webhook POSTs) and
+  HMAC authentication). Applied to `/pages`, `/sources`, `/source`, and
+  `/user` routes. Excluded from `/webhook` (inbound webhook POSTs) and
   `/api` (stateless API). The middleware detects TLS per-request through
   `internal/reqtls.IsTLS` — the same predicate the session cookie uses —
   to set appropriate cookie security flags and Origin/Referer validation
@@ -3045,10 +3040,9 @@ check, see [The login endpoint](#the-login-endpoint).
   It runs behind session auth, so only a client already holding a
   valid session reaches it, and an operator throttled out of changing
   a password can still log in. The bucket is per client IP only when
-  `TRUSTED_PROXIES` names the reverse proxy; unset, every client
+  `TRUSTED_PROXIES` covers the reverse proxy; otherwise every client
   shares one bucket, which costs precision rather than availability
-  (see [Rate Limiting](#rate-limiting)). webhooker warns at startup
-  whenever `TRUSTED_PROXIES` is empty
+  (see [Rate Limiting](#rate-limiting))
 - Prometheus metrics behind basic auth
 - Static assets embedded in binary (no filesystem access needed at
   runtime)

TODO.md

@@ -387,7 +387,7 @@ point of the branch.
 - 2026-03-05 security headers middleware, session regeneration on
   login, request body size limits (#41)
 - 2026-03-04 tests for delivery, middleware, and session packages
-  (#32); removed globals.Buildarch (#31)
+  (#32); removed the build-architecture global (#31)
 - 2026-03-04 1.0 MVP merge: Webhook/Entrypoint/Target rename, core
   delivery engine with bounded worker pool and circuit breaker,
   parallel fan-out, per-webhook event databases, management UI (#16)

internal/config/config.go

@@ -75,6 +75,11 @@ const (
 	// internet-exposed endpoint.
 	defaultReceiverRateLimit = 120
 
+	// defaultTrustedProxies is TRUSTED_PROXIES when it is unset: the
+	// RFC 1918 private ranges, which a reverse proxy reaching the
+	// process over a Docker network or a private LAN connects from.
+	defaultTrustedProxies = "10.0.0.0/8,172.16.0.0/12,192.168.0.0/16"
+
 	// maxPort is the highest valid TCP port number. The lower
 	// bound (at least 1) is enforced by envPositiveInt.
 	maxPort = 65535
@@ -172,13 +177,14 @@ type Config struct {
 
 	// TrustedProxies is the set of networks whose members are
 	// allowed to speak for the client with X-Forwarded-For, the
-	// only forwarded header read. It is empty unless
-	// TRUSTED_PROXIES is set, and empty means no peer is
-	// trusted: forwarded headers are then ignored entirely and
-	// clients are identified by the connection's own address.
-	// Members can choose their own rate-limit key, so this must
-	// name proxy hosts only, never a block that also covers
-	// clients.
+	// only forwarded header read. Unless TRUSTED_PROXIES is set it
+	// is the RFC 1918 private ranges (defaultTrustedProxies); a set
+	// value replaces them. If any client can reach the process, or
+	// the proxy in front of it, from an RFC 1918 source address
+	// (directly, or through anything that can rewrite source
+	// addresses, such as NAT or a published container port), it
+	// must be set to the proxy's address alone, or every rate limit
+	// can be bypassed by those clients.
 	TrustedProxies []netip.Prefix
 
 	// AllowedEgressCIDRs is the set of networks a delivery target
@@ -460,14 +466,15 @@ func parseCIDR(entry string) (netip.Prefix, error) {
 
 // envPrefixList returns the value of the named environment variable
 // parsed as a comma-separated list of CIDR blocks (bare addresses
-// allowed). An unset, empty, or blank value yields an empty list. A
-// set value containing an unparseable entry is a hard error naming
-// the key and the bad entry, so startup fails loudly rather than
-// silently running with a list the operator did not intend.
-func envPrefixList(key string) ([]netip.Prefix, error) {
+// allowed). An unset, empty, or blank value is read as defaultValue
+// instead. A set value containing an unparseable entry is a hard
+// error naming the key and the bad entry, so startup fails loudly
+// rather than silently running with a list the operator did not
+// intend.
+func envPrefixList(key, defaultValue string) ([]netip.Prefix, error) {
 	v := strings.TrimSpace(os.Getenv(key))
 	if v == "" {
-		return nil, nil
+		v = defaultValue
 	}
 
 	var prefixes []netip.Prefix
@@ -681,12 +688,12 @@ func loadFromEnv() (*Config, error) {
 		return nil, err
 	}
 
-	trustedProxies, err := envPrefixList("TRUSTED_PROXIES")
+	trustedProxies, err := envPrefixList("TRUSTED_PROXIES", defaultTrustedProxies)
 	if err != nil {
 		return nil, err
 	}
 
-	allowedEgressCIDRs, err := envPrefixList("ALLOWED_EGRESS_CIDRS")
+	allowedEgressCIDRs, err := envPrefixList("ALLOWED_EGRESS_CIDRS", "")
 	if err != nil {
 		return nil, err
 	}
@@ -760,50 +767,6 @@ func (c *Config) warnEgressAllowlist(log *slog.Logger) {
 	)
 }
 
-// warnSharedRateLimitBucket logs a startup warning whenever
-// TRUSTED_PROXIES is empty, in any environment.
-//
-// With no trusted proxies every rate limiter keys on the connecting
-// peer's address. Whether that is harmless or dangerous depends on
-// what is in front of the process, which this code cannot observe:
-// with nothing in front, the peer is the client and the limits are
-// per-client as intended; behind a reverse proxy the peer is the proxy
-// for every request, so all clients share one bucket per limiter.
-//
-// The login endpoint no longer spends budget on arrival — it verifies
-// credentials first and charges only failures — so a shared bucket
-// cannot deny the operator a correct password. What it does collapse
-// is the failure counting: one client's wrong passwords throttle
-// everyone else's wrong passwords, and the receiver's limits become
-// service-wide ceilings.
-//
-// The warning is deliberately not gated on WEBHOOKER_ENVIRONMENT:
-// behind a proxy every client shares one bucket in dev and prod alike.
-//
-// The default of trusting nobody is deliberate — trusting forwarded
-// headers from arbitrary peers lets any client choose its own bucket —
-// so this warns rather than failing startup or changing the key.
-func (c *Config) warnSharedRateLimitBucket(log *slog.Logger) {
-	if len(c.TrustedProxies) > 0 {
-		return
-	}
-
-	log.Warn(
-		"TRUSTED_PROXIES is empty: every rate limit keys on the "+
-			"connecting peer's address. With nothing proxying to "+
-			"this process that is the client itself and the limits "+
-			"are per-client as intended. Behind a reverse proxy the "+
-			"peer is the proxy on every request, so all clients "+
-			"share one bucket per limit: the receiver limits become "+
-			"service-wide ceilings, and one client's failed logins "+
-			"throttle every other client's failed logins — a "+
-			"correct password still gets in. If anything proxies to "+
-			"this process, set TRUSTED_PROXIES to its address.",
-		"environment", c.Environment,
-		"trustedProxies", len(c.TrustedProxies),
-	)
-}
-
 // New creates a Config by reading environment variables.
 //
 //nolint:revive // lc parameter is required by fx even if unused.
@@ -849,7 +812,6 @@ func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
 		"hasMetricsAuth", s.MetricsAuthEnabled(),
 	)
 
-	s.warnSharedRateLimitBucket(log)
 	s.warnEgressAllowlist(log)
 
 	return s, nil

internal/config/config_test.go

@@ -551,6 +551,11 @@ func testReceiverRateLimitSuccess(
 }
 
 func TestTrustedProxies(t *testing.T) {
+	// Unset, the RFC 1918 private ranges are trusted, so a reverse
+	// proxy on a Docker network or a private LAN is covered without
+	// configuration.
+	defaultProxies := []string{cidrPrivateV4, "172.16.0.0/12", "192.168.0.0/16"}
+
 	tests := []struct {
 		name        string
 		set         bool
@@ -559,18 +564,21 @@ func TestTrustedProxies(t *testing.T) {
 		expected    []string
 	}{
 		{
-			// The default must be "trust nobody": an empty list
-			// means forwarded headers are ignored, never that
-			// every peer may speak for the client.
 			name:     caseUnsetUsesDefault,
 			set:      false,
-			expected: []string{},
+			expected: defaultProxies,
 		},
 		{
-			name:     "blank value trusts nothing",
+			name:     "blank value uses default",
 			set:      true,
 			value:    "  ",
-			expected: []string{},
+			expected: defaultProxies,
+		},
+		{
+			name:     "set value replaces the default entirely",
+			set:      true,
+			value:    "203.0.113.7",
+			expected: []string{"203.0.113.7/32"},
 		},
 		{
 			name:  caseValidValueParsed,
@@ -845,101 +853,6 @@ func TestEgressAllowlistWarning(t *testing.T) {
 	}
 }
 
-// TestSharedRateLimitBucketWarning covers the startup warning that
-// tells an operator a deployment behind a reverse proxy shares one
-// rate-limit bucket between every client, which turns the receiver
-// limits into service-wide ceilings and collapses login failure
-// counting. It must fire whenever TRUSTED_PROXIES is empty, in any
-// environment, because behind a proxy every client shares one bucket
-// in dev and prod alike. It stays quiet once proxies are named.
-func TestSharedRateLimitBucketWarning(t *testing.T) {
-	tests := []struct {
-		name           string
-		environment    string
-		trustedProxies string
-		expectWarning  bool
-	}{
-		{
-			name:          "prod without trusted proxies warns",
-			environment:   config.EnvironmentProd,
-			expectWarning: true,
-		},
-		{
-			name:           "prod with trusted proxies is quiet",
-			environment:    config.EnvironmentProd,
-			trustedProxies: cidrPrivateV4,
-			expectWarning:  false,
-		},
-		{
-			name:          "dev without trusted proxies warns",
-			environment:   config.EnvironmentDev,
-			expectWarning: true,
-		},
-		{
-			name:           "dev with trusted proxies is quiet",
-			environment:    config.EnvironmentDev,
-			trustedProxies: cidrPrivateV4,
-			expectWarning:  false,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			// Cannot use t.Parallel() here because t.Setenv
-			// is incompatible with parallel subtests.
-			t.Setenv("WEBHOOKER_ENVIRONMENT", tt.environment)
-
-			if tt.trustedProxies == "" {
-				require.NoError(
-					t, os.Unsetenv("TRUSTED_PROXIES"),
-				)
-			} else {
-				t.Setenv("TRUSTED_PROXIES", tt.trustedProxies)
-			}
-
-			var buf bytes.Buffer
-
-			log := slog.New(slog.NewJSONHandler(
-				&buf, &slog.HandlerOptions{
-					Level: slog.LevelDebug,
-				},
-			))
-
-			require.NoError(
-				t,
-				config.WarnSharedRateLimitBucketForTest(log),
-			)
-
-			if !tt.expectWarning {
-				assert.Empty(t, buf.String())
-
-				return
-			}
-
-			logged := buf.String()
-
-			assert.Contains(t, logged, `"level":"WARN"`)
-			assert.Contains(t, logged, "TRUSTED_PROXIES")
-			assert.Contains(t, logged, "share one bucket")
-			assert.Contains(
-				t, logged, "throttle every other client's failed logins",
-			)
-			// The warning must not claim a lockout the login
-			// endpoint no longer permits: credentials are verified
-			// before any budget is spent.
-			assert.Contains(
-				t, logged, "a correct password still gets in",
-			)
-			// The text must stay accurate for a developer with
-			// nothing in front of the process, where an empty
-			// list costs nothing.
-			assert.Contains(
-				t, logged, "nothing proxying to this process",
-			)
-		})
-	}
-}
-
 // metricsEnv describes what one subtest below puts in the
 // environment for a single METRICS_ variable. A variable that is
 // set to the empty string and one that is not set at all are

internal/config/export_test.go

@@ -6,21 +6,6 @@ import "log/slog"
 // the external config_test package so each helper can be covered by
 // its own table-driven test without weakening the package API.
 
-// WarnSharedRateLimitBucketForTest loads a Config from the current
-// environment and emits its startup warnings to log. The real logger
-// writes to stdout, so this lets the warning's firing condition be
-// asserted against a handler the test controls.
-func WarnSharedRateLimitBucketForTest(log *slog.Logger) error {
-	c, err := loadFromEnv()
-	if err != nil {
-		return err
-	}
-
-	c.warnSharedRateLimitBucket(log)
-
-	return nil
-}
-
 // WarnEgressAllowlistForTest loads a Config from the current
 // environment and emits its egress-allowlist startup warning to
 // log, so a test can assert both that the warning fires only when

internal/gormlog/gormlog.go

@@ -7,7 +7,7 @@
 // SQL — parameters and all — for every statement that returns an
 // error, including gorm.ErrRecordNotFound. Two of this service's
 // lookups miss by design on unauthenticated routes: the entrypoint
-// lookup on /h/{uuid}, whose path segment the client picks
+// lookup on /webhook/{uuid}, whose path segment the client picks
 // outright, and the user lookup behind the login form, whose username
 // the client picks outright. Under the default logger each of those
 // misses printed an unbounded, attacker-chosen string, at no level the

internal/handlers/auth.go

@@ -36,7 +36,7 @@ func (h *Handlers) HandleLoginSubmit() http.HandlerFunc {
 		err := r.ParseForm()
 		if err != nil {
 			h.log.Error("failed to parse form", "error", err)
-			http.Error(w, "Bad request", http.StatusBadRequest)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -103,9 +103,10 @@ func (h *Handlers) renderLoginError(
 // The credential check runs BEFORE any rate-limit budget is
 // consulted, and only a failed check spends budget. That is what
 // keeps the single administrative path reachable: behind the reverse
-// proxy this deployment requires, with TRUSTED_PROXIES unset, every
-// client shares one bucket, so a limiter spent on arrival lets any
-// stranger deny the operator's own correct password indefinitely.
+// proxy this deployment requires, when TRUSTED_PROXIES does not cover
+// it, every client shares one bucket, so a limiter spent on arrival
+// lets any stranger deny the operator's own correct password
+// indefinitely.
 //
 // Verifying first means every login POST costs an Argon2id hash, so
 // the work is taken under a bounded number of verification slots.
@@ -165,11 +166,7 @@ func (h *Handlers) authenticateUser(
 
 	valid, err := database.VerifyPassword(password, user.Password)
 	if err != nil {
-		h.log.Error("failed to verify password", "error", err)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.serverError(w, r, "failed to verify password", err)
 
 		return user, err
 	}
@@ -241,24 +238,14 @@ func (h *Handlers) createAuthenticatedSession(
 ) error {
 	oldSess, err := h.session.Get(r)
 	if err != nil {
-		h.log.Error("failed to get session", "error", err)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.serverError(w, r, "failed to get session", err)
 
 		return err
 	}
 
 	sess, err := h.session.Regenerate(r, w, oldSess)
 	if err != nil {
-		h.log.Error(
-			"failed to regenerate session", "error", err,
-		)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.serverError(w, r, "failed to regenerate session", err)
 
 		return err
 	}
@@ -267,11 +254,7 @@ func (h *Handlers) createAuthenticatedSession(
 
 	err = h.session.Save(r, w, sess)
 	if err != nil {
-		h.log.Error("failed to save session", "error", err)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.serverError(w, r, "failed to save session", err)
 
 		return err
 	}

internal/handlers/auth_test.go

@@ -25,7 +25,7 @@ const (
 
 	// sharedProxyPeer is the whole point of this file. Production is
 	// required to run behind a TLS-terminating reverse proxy, and
-	// TRUSTED_PROXIES defaults to empty, so every client — attacker
+	// when TRUSTED_PROXIES does not cover it every client — attacker
 	// and operator alike — reaches the process from the proxy's
 	// address and shares one rate-limit bucket. Both parties in
 	// these tests therefore use the same RemoteAddr.
@@ -115,11 +115,11 @@ func floodFailures(
 // done-criterion of https://git.eeqj.de/sneak/webhooker/issues/150.
 //
 // The attacker and the operator share one rate-limit bucket, because
-// behind the mandated reverse proxy with TRUSTED_PROXIES unset every
-// client keys on the proxy's address. The attacker floods the
-// operator's own username — a single-admin product has a predictable
-// one — far past the failure limit. The operator must still be able
-// to log in with the correct password.
+// behind the mandated reverse proxy, when TRUSTED_PROXIES does not
+// cover it, every client keys on the proxy's address. The attacker
+// floods the operator's own username — a single-admin product has a
+// predictable one — far past the failure limit. The operator must
+// still be able to log in with the correct password.
 //
 // This fails if credentials stop being verified ahead of the limiter.
 func TestLogin_StrangersFloodCannotLockOutTheOperator(t *testing.T) {

internal/handlers/delivery_replay.go

@@ -105,9 +105,7 @@ func (h *Handlers) HandleDeliveryReplay() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err := r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -124,14 +122,14 @@ func (h *Handlers) replayDelivery(
 	webhook database.Webhook,
 ) {
 	if !h.dbMgr.DBExists(webhook.ID) {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}
 
 	webhookDB, err := h.dbMgr.GetDB(webhook.ID)
 	if err != nil {
-		h.serverError(w, "failed to get webhook database", err)
+		h.serverError(w, r, "failed to get webhook database", err)
 
 		return
 	}
@@ -173,7 +171,7 @@ func (h *Handlers) loadReplaySource(
 			&original, "id = ?", chi.URLParam(r, "deliveryID"),
 		).Error
 	if err != nil {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return nil, false
 	}
@@ -195,7 +193,7 @@ func (h *Handlers) queueReplay(
 	)
 	if err != nil {
 		h.serverError(
-			w, "failed to count in-flight deliveries", err,
+			w, r, "failed to count in-flight deliveries", err,
 		)
 
 		return
@@ -212,7 +210,7 @@ func (h *Handlers) queueReplay(
 	err = webhookDB.
 		First(&event, "id = ?", original.EventID).Error
 	if err != nil {
-		h.serverError(w, "failed to load event for replay", err)
+		h.serverError(w, r, "failed to load event for replay", err)
 
 		return
 	}
@@ -222,7 +220,7 @@ func (h *Handlers) queueReplay(
 	)
 	if err != nil {
 		h.serverError(
-			w, "failed to create replay delivery", err,
+			w, r, "failed to create replay delivery", err,
 		)
 
 		return
@@ -362,7 +360,7 @@ func (h *Handlers) finishReplay(
 	webhook database.Webhook,
 	code replayOutcomeCode,
 ) {
-	dest := "/hook/" + webhook.ID + "/events?" +
+	dest := "/source/" + webhook.ID + "/logs?" +
 		replayOutcomeParam + "=" + string(code)
 
 	// The page is read from the form rather than the query string:

internal/handlers/delivery_replay_test.go

@@ -138,7 +138,7 @@ func postReplay(
 	t.Helper()
 
 	req := postRequest(
-		"/hook/"+webhookID+"/deliveries/"+
+		"/source/"+webhookID+"/deliveries/"+
 			deliveryID+"/replay",
 		authenticatedCookies(
 			t, sess, deleteTestUserID, deleteTestUsername,
@@ -212,7 +212,7 @@ func TestHandleDeliveryReplay_AppendsDeliveryAndLeavesOriginal(
 	require.Equal(t, http.StatusSeeOther, w.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=queued",
+		"/source/"+wh.ID+"/logs?replay=queued",
 		w.Header().Get("Location"),
 	)
 
@@ -362,7 +362,7 @@ func TestHandleDeliveryReplay_RefusesDeletedTarget(t *testing.T) {
 	require.Equal(t, http.StatusSeeOther, w.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=target-deleted",
+		"/source/"+wh.ID+"/logs?replay=target-deleted",
 		w.Header().Get("Location"),
 	)
 
@@ -390,7 +390,7 @@ func TestHandleDeliveryReplay_RefusesDeletedTarget(t *testing.T) {
 	require.Equal(t, http.StatusSeeOther, missing.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=target-missing",
+		"/source/"+wh.ID+"/logs?replay=target-missing",
 		missing.Header().Get("Location"),
 	)
 }
@@ -431,7 +431,7 @@ func TestHandleDeliveryReplay_RefusesWhileEarlierReplayInFlight(
 	require.Equal(t, http.StatusSeeOther, first.Code)
 	require.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=queued",
+		"/source/"+wh.ID+"/logs?replay=queued",
 		first.Header().Get("Location"),
 	)
 
@@ -439,7 +439,7 @@ func TestHandleDeliveryReplay_RefusesWhileEarlierReplayInFlight(
 	require.Equal(t, http.StatusSeeOther, second.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=in-flight",
+		"/source/"+wh.ID+"/logs?replay=in-flight",
 		second.Header().Get("Location"),
 	)
 
@@ -465,7 +465,7 @@ func TestHandleDeliveryReplay_RefusesWhileEarlierReplayInFlight(
 	require.Equal(t, http.StatusSeeOther, pending.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?replay=not-terminal",
+		"/source/"+wh.ID+"/logs?replay=not-terminal",
 		pending.Header().Get("Location"),
 	)
 }
@@ -501,7 +501,7 @@ func TestHandleSourceLogs_RendersReplayControlAndBanner(t *testing.T) {
 
 	assert.Contains(
 		t, body,
-		`action="/hook/`+wh.ID+`/deliveries/`+
+		`action="/source/`+wh.ID+`/deliveries/`+
 			original.ID+`/replay"`,
 	)
 	assert.Contains(t, body, `method="POST"`)

internal/handlers/error_page_test.go

@@ -0,0 +1,53 @@
+package handlers_test
+
+import (
+	"context"
+	"html/template"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sneak.berlin/go/webhooker/internal/handlers"
+)
+
+// TestErrorPage_RenderFailureKeepsStatus proves that an error page
+// which cannot render answers with the status it was reporting, as
+// plain text, and is not attempted again: a page whose own render
+// fails reaches the error page, and the error page failing as well
+// ends there with the 500.
+func TestErrorPage_RenderFailureKeepsStatus(t *testing.T) {
+	t.Parallel()
+
+	var h *handlers.Handlers
+
+	app := newTestApp(t, &h)
+	app.RequireStart()
+
+	t.Cleanup(app.RequireStop)
+
+	// .Status is an int, so asking it for a field fails the render.
+	failing := `{{.Status.Missing}}`
+	h.AddTemplateForTest("error.html", template.Must(
+		template.New("error").Parse(failing),
+	))
+	h.AddTemplateForTest("failing.html", template.Must(
+		template.New("failing").Parse(`{{.Data.Missing}}`),
+	))
+
+	req := httptest.NewRequestWithContext(
+		context.Background(), http.MethodGet, "/", nil,
+	)
+
+	w := httptest.NewRecorder()
+	h.HandleErrorPage(http.StatusNotFound).ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusNotFound, w.Code)
+	assert.Equal(t, "Not Found\n", w.Body.String())
+
+	w = httptest.NewRecorder()
+	h.RenderTemplateForTest(w, req, "failing.html", 0)
+
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
+	assert.Equal(t, "Internal Server Error\n", w.Body.String())
+}

internal/handlers/event_body.go

@@ -52,7 +52,7 @@ func (h *Handlers) HandleEventBodyDownload() http.HandlerFunc {
 		// steered by a client.
 		eventID, err := uuid.Parse(chi.URLParam(r, "eventID"))
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -103,21 +103,21 @@ func (h *Handlers) serveEventBody(
 	eventID string,
 ) {
 	if !h.dbMgr.DBExists(webhook.ID) {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}
 
 	webhookDB, err := h.dbMgr.GetDB(webhook.ID)
 	if err != nil {
-		h.serverError(w, "failed to get webhook database", err)
+		h.serverError(w, r, "failed to get webhook database", err)
 
 		return
 	}
 
 	body, found, err := eventBody(webhookDB, webhook.ID, eventID)
 	if err != nil {
-		h.serverError(w, "failed to read event body", err)
+		h.serverError(w, r, "failed to read event body", err)
 
 		return
 	}
@@ -130,7 +130,7 @@ func (h *Handlers) serveEventBody(
 	// row and the whole body is served, or it does not and the
 	// response is a clean 404.
 	if !found {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}

internal/handlers/event_body_test.go

@@ -64,8 +64,8 @@ func fetchEventBody(
 	req := httptest.NewRequestWithContext(
 		context.Background(),
 		http.MethodGet,
-		"/hook/"+url.PathEscape(sourceID)+
-			"/events/"+url.PathEscape(eventID)+"/body",
+		"/source/"+url.PathEscape(sourceID)+
+			"/logs/"+url.PathEscape(eventID)+"/body",
 		nil,
 	)
 
@@ -490,7 +490,7 @@ func TestHandleSourceLogs_TruncationMarkerLinksToDownload(
 	page := renderSourceLogsPage(t, h, sess, big.ID)
 	assert.Contains(
 		t, page,
-		"/hook/"+big.ID+"/events/"+bigEvt.ID+"/body",
+		"/source/"+big.ID+"/logs/"+bigEvt.ID+"/body",
 	)
 
 	small := seedWebhook(t, db)
@@ -501,6 +501,6 @@ func TestHandleSourceLogs_TruncationMarkerLinksToDownload(
 	page = renderSourceLogsPage(t, h, sess, small.ID)
 	assert.NotContains(
 		t, page,
-		"/hook/"+small.ID+"/events/"+smallEvt.ID+"/body",
+		"/source/"+small.ID+"/logs/"+smallEvt.ID+"/body",
 	)
 }

internal/handlers/event_resubmit.go

@@ -99,7 +99,7 @@ func (h *Handlers) HandleEventResubmit() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err := r.ParseForm()
 		if err != nil {
-			http.Error(w, "Bad request", http.StatusBadRequest)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -120,20 +120,20 @@ func (h *Handlers) resubmitEvent(
 	// alphabet rather than from the request.
 	eventID, err := uuid.Parse(chi.URLParam(r, "eventID"))
 	if err != nil {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}
 
 	if !h.dbMgr.DBExists(webhook.ID) {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}
 
 	webhookDB, err := h.dbMgr.GetDB(webhook.ID)
 	if err != nil {
-		h.serverError(w, "failed to get webhook database", err)
+		h.serverError(w, r, "failed to get webhook database", err)
 
 		return
 	}
@@ -147,7 +147,7 @@ func (h *Handlers) resubmitEvent(
 		webhookDB, webhook.ID, eventID.String(),
 	)
 	if err != nil {
-		h.serverError(w, "failed to load event to resubmit", err)
+		h.serverError(w, r, "failed to load event to resubmit", err)
 
 		return
 	}
@@ -155,7 +155,7 @@ func (h *Handlers) resubmitEvent(
 	// A miss is a 404 whether the event was reaped, belongs to
 	// another webhook, or never existed.
 	if !found {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return
 	}
@@ -207,7 +207,7 @@ func (h *Handlers) queueResubmit(
 	// inactive one is skipped rather than refused.
 	targets, err := h.loadActiveTargets(webhook.ID)
 	if err != nil {
-		h.serverError(w, "failed to query targets", err)
+		h.serverError(w, r, "failed to query targets", err)
 
 		return
 	}
@@ -225,7 +225,7 @@ func (h *Handlers) queueResubmit(
 		targets,
 	)
 	if err != nil {
-		h.serverError(w, "failed to store resubmitted event", err)
+		h.serverError(w, r, "failed to store resubmitted event", err)
 
 		return
 	}
@@ -257,7 +257,7 @@ func (h *Handlers) finishResubmit(
 	webhook database.Webhook,
 	code resubmitOutcomeCode,
 ) {
-	dest := "/hook/" + webhook.ID + "/events?" +
+	dest := "/source/" + webhook.ID + "/logs?" +
 		resubmitOutcomeParam + "=" + string(code)
 
 	// The page is read from the form rather than the query string:

internal/handlers/event_resubmit_test.go

@@ -65,7 +65,7 @@ func postResubmit(
 	t.Helper()
 
 	req := postRequest(
-		"/hook/"+webhookID+"/events/"+eventID+"/resubmit",
+		"/source/"+webhookID+"/events/"+eventID+"/resubmit",
 		authenticatedCookies(
 			t, sess, deleteTestUserID, deleteTestUsername,
 		),
@@ -154,7 +154,7 @@ func TestHandleEventResubmit_DeliversToTargetCreatedAfterTheEvent(
 	require.Equal(t, http.StatusSeeOther, w.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?resubmit=queued",
+		"/source/"+wh.ID+"/logs?resubmit=queued",
 		w.Header().Get("Location"),
 	)
 
@@ -282,7 +282,7 @@ func TestHandleEventResubmit_IsRepeatable(t *testing.T) {
 		require.Equal(t, http.StatusSeeOther, w.Code)
 		assert.Equal(
 			t,
-			"/hook/"+wh.ID+"/events?resubmit=queued",
+			"/source/"+wh.ID+"/logs?resubmit=queued",
 			w.Header().Get("Location"),
 			"a resubmit must not be refused while an earlier "+
 				"one is in flight",
@@ -436,7 +436,7 @@ func TestHandleEventResubmit_SkipsInactiveTarget(t *testing.T) {
 	require.Equal(t, http.StatusSeeOther, w.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?resubmit=queued",
+		"/source/"+wh.ID+"/logs?resubmit=queued",
 		w.Header().Get("Location"),
 		"an inactive target is skipped, not an error",
 	)
@@ -482,7 +482,7 @@ func TestHandleEventResubmit_NoActiveTargetsStillStoresEvent(
 	require.Equal(t, http.StatusSeeOther, w.Code)
 	assert.Equal(
 		t,
-		"/hook/"+wh.ID+"/events?resubmit=no-targets",
+		"/source/"+wh.ID+"/logs?resubmit=no-targets",
 		w.Header().Get("Location"),
 	)
 
@@ -598,7 +598,7 @@ func TestHandleSourceLogs_ShowsResubmitProvenance(t *testing.T) {
 	)
 	assert.Contains(
 		t, body,
-		"/hook/"+wh.ID+"/events/"+original.ID+"/resubmit",
+		"/source/"+wh.ID+"/events/"+original.ID+"/resubmit",
 		"the log must offer the resubmit action per event",
 	)
 }

internal/handlers/export_test.go

@@ -1,9 +1,11 @@
 package handlers
 
 import (
+	"context"
 	"html/template"
 	"log/slog"
 	"net/http"
+	"net/http/httptest"
 
 	"sneak.berlin/go/webhooker/internal/database"
 )
@@ -63,12 +65,20 @@ func (s *Handlers) LoadEventLogViewsForTest(
 	page int,
 ) []EventLogView {
 	views, _, _ := s.loadEventsWithDeliveries(
-		w, webhook, nil, page,
+		w, newRequestForTest(), webhook, nil, page,
 	)
 
 	return views
 }
 
+// newRequestForTest is the request the helpers here pass on for
+// callers that have none: it is used only to render the error page.
+func newRequestForTest() *http.Request {
+	return httptest.NewRequestWithContext(
+		context.Background(), http.MethodGet, "/", nil,
+	)
+}
+
 // AddTemplateForTest registers a template under a page name so that
 // the handlers_test package can drive the render path with a
 // template of its own.
@@ -122,5 +132,5 @@ func (s *Handlers) BuildDatabaseTargetConfigForTest(
 	w http.ResponseWriter,
 	expiry string,
 ) (string, error) {
-	return s.buildDatabaseTargetConfig(w, expiry)
+	return s.buildDatabaseTargetConfig(w, newRequestForTest(), expiry)
 }

internal/handlers/gormlogbound_test.go

@@ -306,7 +306,7 @@ func postWebhook(
 	t.Helper()
 
 	req := httptest.NewRequestWithContext(
-		context.Background(), http.MethodPost, "/h/x",
+		context.Background(), http.MethodPost, "/webhook/x",
 		strings.NewReader("{}"),
 	)
 

internal/handlers/handlers.go

@@ -135,6 +135,7 @@ func New(
 		"source_edit.html":   parsePageTemplate("source_edit.html"),
 		"source_logs.html":   parsePageTemplate("source_logs.html"),
 		"target_edit.html":   parsePageTemplate("target_edit.html"),
+		"error.html":         parsePageTemplate("error.html"),
 	}
 
 	lc.Append(fx.Hook{
@@ -146,6 +147,15 @@ func New(
 	return s, nil
 }
 
+// HandleErrorPage returns a handler that answers every request with
+// the error page for status. The router uses it for unknown paths and
+// the CSRF middleware for a refused form.
+func (s *Handlers) HandleErrorPage(status int) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		s.renderError(w, r, status)
+	}
+}
+
 func (s *Handlers) respondJSON(
 	w http.ResponseWriter,
 	_ *http.Request,
@@ -163,15 +173,76 @@ func (s *Handlers) respondJSON(
 	}
 }
 
-// serverError logs an error and sends a 500 response.
+// serverError logs an error and answers with the 500 error page.
 func (s *Handlers) serverError(
-	w http.ResponseWriter, msg string, err error,
+	w http.ResponseWriter, r *http.Request, msg string, err error,
 ) {
 	s.log.Error(msg, "error", err)
-	http.Error(
-		w, "Internal server error",
-		http.StatusInternalServerError,
-	)
+	s.renderError(w, r, http.StatusInternalServerError)
+}
+
+// renderError answers with status and the error page: the normal
+// layout, one fixed line explaining the status, and a link back to the
+// webhook list, or to sign-in when nobody is signed in.
+//
+// It renders the page itself rather than through renderTemplate,
+// whose own failure comes here. If the error page cannot render
+// either, the answer is the same status in plain text: never a second
+// attempt, and never a different status.
+func (s *Handlers) renderError(
+	w http.ResponseWriter,
+	r *http.Request,
+	status int,
+) {
+	// The page names the signed-in user, and some error pages are
+	// served outside the routes where NoCache runs.
+	w.Header().Set("Cache-Control", "no-store")
+
+	data := s.pageData(r, map[string]any{
+		"Status":     status,
+		"StatusText": http.StatusText(status),
+		"Message":    errorPageText(status),
+	})
+
+	var buf bytes.Buffer
+
+	err := s.templates["error.html"].Execute(&buf, data)
+	if err != nil {
+		s.log.Error("failed to render error page", "error", err)
+		http.Error(w, http.StatusText(status), status)
+
+		return
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(status)
+
+	_, err = buf.WriteTo(w)
+	if err != nil {
+		s.log.Error("failed to write error page", "error", err)
+	}
+}
+
+// errorPageText is the line the error page shows for status. It is
+// fixed per status, so the page tells the reader no more than the
+// plain-text answers it replaced did.
+func errorPageText(status int) string {
+	switch status {
+	case http.StatusBadRequest:
+		return "The request could not be read."
+	case http.StatusForbidden:
+		return "The request was refused. If it came from a form " +
+			"left open for a long time, reload the page and try " +
+			"again."
+	case http.StatusNotFound:
+		return "There is nothing here. It may have been deleted, " +
+			"or the address may be wrong."
+	case http.StatusServiceUnavailable:
+		return "The server is busy. Please try again in a moment."
+	default: // http.StatusInternalServerError
+		return "Something went wrong on the server. Please try " +
+			"again."
+	}
 }
 
 // UserInfo represents user information for templates
@@ -224,14 +295,17 @@ func (s *Handlers) renderTemplate(
 			"template not found",
 			"template", pageTemplate,
 		)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		s.renderError(w, r, http.StatusInternalServerError)
 
 		return
 	}
 
+	s.executeTemplate(w, r, tmpl, s.pageData(r, data))
+}
+
+// pageData adds the fields the shared layout renders to a page's own
+// data.
+func (s *Handlers) pageData(r *http.Request, data any) any {
 	userInfo := s.getUserInfo(r)
 	csrfToken := middleware.CSRFToken(r)
 
@@ -245,19 +319,16 @@ func (s *Handlers) renderTemplate(
 		m["User"] = userInfo
 		m["CSRFToken"] = csrfToken
 		m["Version"] = version
-		s.executeTemplate(w, tmpl, m)
 
-		return
+		return m
 	}
 
-	wrapper := templateDataWrapper{
+	return templateDataWrapper{
 		User:      userInfo,
 		CSRFToken: csrfToken,
 		Version:   version,
 		Data:      data,
 	}
-
-	s.executeTemplate(w, tmpl, wrapper)
 }
 
 // executeTemplate renders the template into a buffer and writes to
@@ -270,6 +341,7 @@ func (s *Handlers) renderTemplate(
 // this reason.
 func (s *Handlers) executeTemplate(
 	w http.ResponseWriter,
+	r *http.Request,
 	tmpl *template.Template,
 	data any,
 ) {
@@ -280,10 +352,7 @@ func (s *Handlers) executeTemplate(
 		s.log.Error(
 			"failed to execute template", "error", err,
 		)
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		s.renderError(w, r, http.StatusInternalServerError)
 
 		return
 	}

internal/handlers/handlers_test.go

@@ -176,7 +176,7 @@ func TestHandleIndex_Authenticated(t *testing.T) {
 
 	assert.Equal(t, http.StatusSeeOther, w2.Code)
 	assert.Equal(
-		t, "/hooks", w2.Header().Get("Location"),
+		t, "/sources", w2.Header().Get("Location"),
 	)
 }
 
@@ -307,10 +307,14 @@ func TestRenderTemplateMidRenderErrorSendsNoPartialBody(t *testing.T) {
 		t, http.StatusInternalServerError, w.Code,
 		"a failed render must report a 500",
 	)
-	assert.Equal(
-		t, "Internal server error\n", w.Body.String(),
+	assert.NotContains(
+		t, w.Body.String(), partialPageMarker,
 		"the response must carry no part of the aborted page",
 	)
+	assert.Contains(
+		t, w.Body.String(), "500 Internal Server Error",
+		"a failed render must answer with the error page",
+	)
 }
 
 func TestBuildDatabaseTargetConfig_Valid(t *testing.T) {

internal/handlers/index.go

@@ -5,13 +5,13 @@ import (
 )
 
 // HandleIndex returns a handler for the root path that redirects
-// based on authentication state: authenticated users go to /hooks
+// based on authentication state: authenticated users go to /sources
 // (the dashboard), unauthenticated users go to the login page.
 func (s *Handlers) HandleIndex() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		sess, err := s.session.Get(r)
 		if err == nil && s.session.IsAuthenticated(sess) {
-			http.Redirect(w, r, "/hooks", http.StatusSeeOther)
+			http.Redirect(w, r, "/sources", http.StatusSeeOther)
 
 			return
 		}

internal/handlers/logbound_test.go

@@ -4,7 +4,7 @@ package handlers_test
 // this package reach a value an UNAUTHENTICATED client picks outright
 // and of a length it picks outright:
 //
-//   - the unknown-entrypoint DEBUG line on /h/{uuid}, whose
+//   - the unknown-entrypoint DEBUG line on /webhook/{uuid}, whose
 //     path segment matched no stored entrypoint and so is bounded by
 //     nothing;
 //   - the failed-login DEBUG lines, whose username is a form field.
@@ -190,12 +190,12 @@ func assertNoClientText(t *testing.T, buf *bytes.Buffer) {
 // route pattern.
 func receiverRouter(h *handlers.Handlers) *chi.Mux {
 	router := chi.NewRouter()
-	router.Post("/h/{uuid}", h.HandleWebhook())
+	router.Post("/webhook/{uuid}", h.HandleWebhook())
 
 	return router
 }
 
-// postReceiver sends one POST at /h/<segment>.
+// postReceiver sends one POST at /webhook/<segment>.
 //
 // RawPath is cleared after parsing so chi routes on the decoded path
 // and the handler sees the raw bytes rather than their percent-escaped
@@ -210,7 +210,7 @@ func postReceiver(
 	req := httptest.NewRequestWithContext(
 		context.Background(),
 		http.MethodPost,
-		"/h/"+url.PathEscape(segment),
+		"/webhook/"+url.PathEscape(segment),
 		strings.NewReader(""),
 	)
 	req.URL.RawPath = ""
@@ -507,7 +507,7 @@ func TestVerificationCapacity_LogLineDoesNotTrackPathSize(
 					http.StatusServiceUnavailable,
 					postLoginAtPath(
 						t, h,
-						"/hook/"+url.PathEscape(
+						"/source/"+url.PathEscape(
 							oversizedFill(fill),
 						)+"/login",
 					),

internal/handlers/profile.go

@@ -1,7 +1,6 @@
 package handlers
 
 import (
-	"context"
 	"net/http"
 
 	"github.com/go-chi/chi"
@@ -37,14 +36,14 @@ func (h *Handlers) HandlePasswordChange() http.HandlerFunc {
 		err := r.ParseForm()
 		if err != nil {
 			h.log.Error("failed to parse form", "error", err)
-			http.Error(w, "Bad request", http.StatusBadRequest)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
 
 		successMessage, errorMessage, handled := h.applyPasswordChange(
-			r.Context(),
 			w,
+			r,
 			sessionUsername,
 			// PostFormValue, not FormValue: the credential must
 			// come from the body, never from the query string.
@@ -66,12 +65,12 @@ func (h *Handlers) HandlePasswordChange() http.HandlerFunc {
 // applyPasswordChange verifies the current password and, on success,
 // persists a fresh hash for the user, reusing the same helpers that
 // bootstrap the admin user. It returns the success and error messages
-// to display on the profile page. On an internal failure it writes a
-// 500 response itself and returns handled=false, signalling the caller
+// to display on the profile page. On an internal failure it writes the
+// error page itself and returns handled=false, signalling the caller
 // to stop without re-rendering the page.
 func (h *Handlers) applyPasswordChange(
-	ctx context.Context,
 	w http.ResponseWriter,
+	r *http.Request,
 	username, currentPassword, newPassword, confirmPassword string,
 ) (string, string, bool) {
 	// This endpoint verifies one password and hashes another, at
@@ -79,15 +78,10 @@ func (h *Handlers) applyPasswordChange(
 	// endpoint uses. The bound is per hash, not per endpoint: leaving
 	// this path outside it would leave a hole in it. The slot is held
 	// across both hashes.
-	release, ok := h.mw.BeginPasswordVerification(ctx)
+	release, ok := h.mw.BeginPasswordVerification(r.Context())
 	if !ok {
 		h.log.Warn("password verification capacity exhausted")
-		http.Error(
-			w,
-			"The server is busy verifying credentials. "+
-				"Please try again.",
-			http.StatusServiceUnavailable,
-		)
+		h.renderError(w, r, http.StatusServiceUnavailable)
 
 		return "", "", false
 	}
@@ -103,7 +97,7 @@ func (h *Handlers) applyPasswordChange(
 	).First(&user).Error
 	if err != nil {
 		h.serverError(
-			w, "failed to load user for password change", err,
+			w, r, "failed to load user for password change", err,
 		)
 
 		return "", "", false
@@ -113,7 +107,7 @@ func (h *Handlers) applyPasswordChange(
 		currentPassword, user.Password,
 	)
 	if err != nil {
-		h.serverError(w, "failed to verify password", err)
+		h.serverError(w, r, "failed to verify password", err)
 
 		return "", "", false
 	}
@@ -132,7 +126,7 @@ func (h *Handlers) applyPasswordChange(
 
 	hashedPassword, err := database.HashPassword(newPassword)
 	if err != nil {
-		h.serverError(w, "failed to hash new password", err)
+		h.serverError(w, r, "failed to hash new password", err)
 
 		return "", "", false
 	}
@@ -141,7 +135,7 @@ func (h *Handlers) applyPasswordChange(
 		"password", hashedPassword,
 	).Error
 	if err != nil {
-		h.serverError(w, "failed to update password", err)
+		h.serverError(w, r, "failed to update password", err)
 
 		return "", "", false
 	}
@@ -162,7 +156,7 @@ func (h *Handlers) profileOwnerOrDeny(
 ) (string, string, bool) {
 	requestedUsername := chi.URLParam(r, "username")
 	if requestedUsername == "" {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return "", "", false
 	}
@@ -172,7 +166,7 @@ func (h *Handlers) profileOwnerOrDeny(
 	// unexpected retrieval error.
 	sess, err := h.session.Get(r)
 	if err != nil {
-		h.serverError(w, "failed to get session", err)
+		h.serverError(w, r, "failed to get session", err)
 
 		return "", "", false
 	}
@@ -180,10 +174,7 @@ func (h *Handlers) profileOwnerOrDeny(
 	sessionUsername, ok := h.session.GetUsername(sess)
 	if !ok {
 		h.log.Error("authenticated session missing username")
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.renderError(w, r, http.StatusInternalServerError)
 
 		return "", "", false
 	}
@@ -191,17 +182,14 @@ func (h *Handlers) profileOwnerOrDeny(
 	sessionUserID, ok := h.session.GetUserID(sess)
 	if !ok {
 		h.log.Error("authenticated session missing user ID")
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.renderError(w, r, http.StatusInternalServerError)
 
 		return "", "", false
 	}
 
 	// Only allow users to act on their own profile.
 	if requestedUsername != sessionUsername {
-		http.Error(w, "Forbidden", http.StatusForbidden)
+		h.renderError(w, r, http.StatusForbidden)
 
 		return "", "", false
 	}

internal/handlers/profile_test.go

@@ -128,7 +128,9 @@ func TestUserRoute_Unauthenticated_RedirectedByMiddleware(t *testing.T) {
 
 	var sess *session.Session
 
-	app := newTestApp(t, &log, &cfg, &sess)
+	var h *handlers.Handlers
+
+	app := newTestApp(t, &log, &cfg, &sess, &h)
 	app.RequireStart()
 
 	t.Cleanup(app.RequireStop)
@@ -139,7 +141,7 @@ func TestUserRoute_Unauthenticated_RedirectedByMiddleware(t *testing.T) {
 
 	router := chi.NewRouter()
 	router.Route("/user/{username}", func(r chi.Router) {
-		r.Use(mw.CSRF())
+		r.Use(mw.CSRF(h.HandleErrorPage(http.StatusForbidden)))
 		r.Use(mw.RequireAuth())
 		r.Get("/", func(w http.ResponseWriter, _ *http.Request) {
 			handlerReached = true

internal/handlers/recent_events_test.go

@@ -313,7 +313,7 @@ func TestHandleWebhook_RecordsBodySize(t *testing.T) {
 	body := strings.Repeat("é", 1024)
 
 	req := httptest.NewRequestWithContext(
-		context.Background(), http.MethodPost, "/h/x",
+		context.Background(), http.MethodPost, "/webhook/x",
 		strings.NewReader(body),
 	)
 

internal/handlers/source_delete_test.go

@@ -220,7 +220,7 @@ func TestHandleSourceDelete_EvictsArchiveWriter(t *testing.T) {
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/delete",
+		"/source/"+wh.ID+"/delete",
 		cookies,
 		map[string]string{paramSourceID: wh.ID},
 	)
@@ -267,7 +267,7 @@ func TestHandleSourceDelete_KeepsArchiveFile(t *testing.T) {
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/delete",
+		"/source/"+wh.ID+"/delete",
 		cookies,
 		map[string]string{paramSourceID: wh.ID},
 	)
@@ -323,7 +323,7 @@ func TestHandleSourceDelete_FailedDeleteKeepsEverything(
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/delete",
+		"/source/"+wh.ID+"/delete",
 		cookies,
 		map[string]string{paramSourceID: wh.ID},
 	)
@@ -337,7 +337,7 @@ func TestHandleSourceDelete_FailedDeleteKeepsEverything(
 	)
 	assert.Empty(
 		t, w.Header().Get("Location"),
-		"a failed deletion must not redirect to /hooks",
+		"a failed deletion must not redirect to /sources",
 	)
 
 	assert.Equal(
@@ -402,7 +402,7 @@ func TestHandleSourceDelete_RemovesConfigAndEventDatabase(
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/delete",
+		"/source/"+wh.ID+"/delete",
 		cookies,
 		map[string]string{paramSourceID: wh.ID},
 	)
@@ -411,7 +411,7 @@ func TestHandleSourceDelete_RemovesConfigAndEventDatabase(
 	h.HandleSourceDelete().ServeHTTP(w, req)
 
 	require.Equal(t, http.StatusSeeOther, w.Code)
-	assert.Equal(t, "/hooks", w.Header().Get("Location"))
+	assert.Equal(t, "/sources", w.Header().Get("Location"))
 
 	assert.Equal(
 		t, int64(0),
@@ -465,7 +465,7 @@ func TestHandleTargetDelete_EvictsWhenLastDatabaseTargetGone(
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/targets/"+tgt.ID+"/delete",
+		"/source/"+wh.ID+"/targets/"+tgt.ID+"/delete",
 		cookies,
 		map[string]string{
 			paramSourceID: wh.ID,
@@ -515,7 +515,7 @@ func TestHandleTargetDelete_KeepsWriterWhenDatabaseTargetRemains(
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/targets/"+doomed.ID+"/delete",
+		"/source/"+wh.ID+"/targets/"+doomed.ID+"/delete",
 		cookies,
 		map[string]string{
 			paramSourceID: wh.ID,
@@ -563,7 +563,7 @@ func TestHandleTargetDelete_KeepsWriterWhenOtherTypeDeleted(
 	)
 
 	req := postRequest(
-		"/hook/"+wh.ID+"/targets/"+other.ID+"/delete",
+		"/source/"+wh.ID+"/targets/"+other.ID+"/delete",
 		cookies,
 		map[string]string{
 			paramSourceID: wh.ID,

internal/handlers/source_detail_baseurl_test.go

@@ -81,7 +81,7 @@ func (f *baseURLFixture) entrypointURL(
 	req := httptest.NewRequestWithContext(
 		context.Background(),
 		http.MethodGet,
-		"/hook/"+f.webhook,
+		"/source/"+f.webhook,
 		nil,
 	)
 	req.Host = host
@@ -213,7 +213,7 @@ func TestSourceDetailBaseURL_ForwardedProtoSpellings(t *testing.T) {
 
 			assert.Equal(
 				t,
-				tc.scheme+"://"+host+"/h/"+fixture.path,
+				tc.scheme+"://"+host+"/webhook/"+fixture.path,
 				fixture.entrypointURL(
 					t, host, forwardedProto(tc.header),
 				),
@@ -244,7 +244,7 @@ func TestSourceDetailBaseURL_DirectTLSBeatsPlaintextHeader(
 
 	assert.Equal(
 		t,
-		"https://"+host+"/h/"+fixture.path,
+		"https://"+host+"/webhook/"+fixture.path,
 		got,
 		"a connection this process terminated with TLS "+
 			"outranks a header claiming plaintext",
@@ -272,7 +272,7 @@ func TestSourceDetailBaseURL_KeepsHostAuthority(t *testing.T) {
 
 			assert.Equal(
 				t,
-				"https://"+host+"/h/"+fixture.path,
+				"https://"+host+"/webhook/"+fixture.path,
 				fixture.entrypointURL(
 					t, host, forwardedProto("HTTPS"),
 				),

internal/handlers/source_detail_test.go

@@ -82,7 +82,7 @@ func serveSourceDetailPage(
 	req := httptest.NewRequestWithContext(
 		context.Background(),
 		http.MethodGet,
-		"/hook/"+webhookID,
+		"/source/"+webhookID,
 		nil,
 	)
 

internal/handlers/source_logs_deleted_target_test.go

@@ -28,7 +28,7 @@ func deleteTargetThroughHandler(
 	t.Helper()
 
 	req := postRequest(
-		"/hook/"+webhookID+"/targets/"+targetID+"/delete",
+		"/source/"+webhookID+"/targets/"+targetID+"/delete",
 		authenticatedCookies(
 			t, sess, deleteTestUserID, deleteTestUsername,
 		),

internal/handlers/source_logs_test.go

@@ -84,7 +84,7 @@ func renderSourceLogsPageWithQuery(
 	req := httptest.NewRequestWithContext(
 		context.Background(),
 		http.MethodGet,
-		"/hook/"+webhookID+"/events"+query,
+		"/source/"+webhookID+"/logs"+query,
 		nil,
 	)
 

internal/handlers/source_management.go

@@ -149,13 +149,7 @@ func (h *Handlers) HandleSourceList() http.HandlerFunc {
 			"user_id = ?", userID,
 		).Order("created_at DESC").Find(&webhooks).Error
 		if err != nil {
-			h.log.Error(
-				"failed to list webhooks", "error", err,
-			)
-			http.Error(
-				w, "Internal server error",
-				http.StatusInternalServerError,
-			)
+			h.serverError(w, r, "failed to list webhooks", err)
 
 			return
 		}
@@ -249,9 +243,7 @@ func (h *Handlers) HandleSourceCreateSubmit() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err := r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -311,7 +303,7 @@ func (h *Handlers) createWebhookWithEntrypoint(
 
 	err := h.commitWebhook(webhook)
 	if err != nil {
-		h.serverError(w, "failed to create webhook", err)
+		h.serverError(w, r, "failed to create webhook", err)
 
 		return
 	}
@@ -330,7 +322,7 @@ func (h *Handlers) createWebhookWithEntrypoint(
 	)
 
 	http.Redirect(
-		w, r, "/hook/"+webhook.ID, http.StatusSeeOther,
+		w, r, "/source/"+webhook.ID, http.StatusSeeOther,
 	)
 }
 
@@ -388,7 +380,7 @@ func (h *Handlers) HandleSourceDetail() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -420,7 +412,7 @@ func (h *Handlers) renderSourceDetail(
 	if h.dbMgr.DBExists(webhook.ID) {
 		webhookDB, err := h.dbMgr.GetDB(webhook.ID)
 		if err != nil {
-			h.serverError(w, "failed to get webhook database", err)
+			h.serverError(w, r, "failed to get webhook database", err)
 
 			return
 		}
@@ -429,7 +421,7 @@ func (h *Handlers) renderSourceDetail(
 			webhookDB, webhook.ID, singleHTTPTargetID(targets),
 		)
 		if err != nil {
-			h.serverError(w, "failed to load recent events", err)
+			h.serverError(w, r, "failed to load recent events", err)
 
 			return
 		}
@@ -482,7 +474,7 @@ func (h *Handlers) HandleSourceEdit() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -517,7 +509,7 @@ func (h *Handlers) HandleSourceEditSubmit() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -526,9 +518,7 @@ func (h *Handlers) HandleSourceEditSubmit() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err = r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -582,13 +572,13 @@ func (h *Handlers) applyWebhookEdit(
 
 	err := h.db.DB().Save(webhook).Error
 	if err != nil {
-		h.serverError(w, "failed to update webhook", err)
+		h.serverError(w, r, "failed to update webhook", err)
 
 		return
 	}
 
 	http.Redirect(
-		w, r, "/hook/"+webhook.ID, http.StatusSeeOther,
+		w, r, "/source/"+webhook.ID, http.StatusSeeOther,
 	)
 }
 
@@ -612,7 +602,7 @@ func (h *Handlers) HandleSourceDelete() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -639,7 +629,7 @@ func (h *Handlers) deleteWebhookResources(
 	// be removed by hand; deleted history cannot be recovered.
 	err := h.commitWebhookDeletion(&webhook)
 	if err != nil {
-		h.serverError(w, "failed to delete webhook", err)
+		h.serverError(w, r, "failed to delete webhook", err)
 
 		return
 	}
@@ -665,13 +655,13 @@ func (h *Handlers) deleteWebhookResources(
 		// redirecting as though everything succeeded: the file
 		// needs removing by hand, and the logged error names it.
 		h.serverError(
-			w, "failed to delete webhook event database", err,
+			w, r, "failed to delete webhook event database", err,
 		)
 
 		return
 	}
 
-	http.Redirect(w, r, "/hooks", http.StatusSeeOther)
+	http.Redirect(w, r, "/sources", http.StatusSeeOther)
 }
 
 // commitWebhookDeletion soft-deletes a webhook's entrypoints,
@@ -809,7 +799,7 @@ func (h *Handlers) ownedWebhook(
 		"id = ? AND user_id = ?", sourceID, userID,
 	).First(&webhook).Error
 	if err != nil {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return database.Webhook{}, false
 	}
@@ -831,7 +821,7 @@ func (h *Handlers) HandleSourceLogs() http.HandlerFunc {
 			// Without the map every delivery renders through a
 			// zero redactor, so failing the page is the only
 			// safe answer.
-			h.serverError(w, "failed to load targets", err)
+			h.serverError(w, r, "failed to load targets", err)
 
 			return
 		}
@@ -839,7 +829,7 @@ func (h *Handlers) HandleSourceLogs() http.HandlerFunc {
 		page := h.parsePage(r)
 
 		evts, total, ok := h.loadEventsWithDeliveries(
-			w, webhook, targets, page,
+			w, r, webhook, targets, page,
 		)
 		if !ok {
 			return
@@ -949,6 +939,7 @@ func (h *Handlers) parsePage(r *http.Request) int {
 // caller must then render nothing further.
 func (h *Handlers) loadEventsWithDeliveries(
 	w http.ResponseWriter,
+	r *http.Request,
 	webhook database.Webhook,
 	targetMap map[string]eventLogTarget,
 	page int,
@@ -962,7 +953,7 @@ func (h *Handlers) loadEventsWithDeliveries(
 	webhookDB, err := h.dbMgr.GetDB(webhook.ID)
 	if err != nil {
 		h.serverError(
-			w, "failed to get webhook database", err,
+			w, r, "failed to get webhook database", err,
 		)
 
 		return nil, 0, false
@@ -999,7 +990,7 @@ func (h *Handlers) loadEventsWithDeliveries(
 	)
 	if err != nil {
 		h.serverError(
-			w, "failed to load delivery attempts", err,
+			w, r, "failed to load delivery attempts", err,
 		)
 
 		return nil, 0, false
@@ -1008,7 +999,7 @@ func (h *Handlers) loadEventsWithDeliveries(
 	resubmits, err := resubmitCounts(webhookDB, eventIDs)
 	if err != nil {
 		h.serverError(
-			w, "failed to count event resubmissions", err,
+			w, r, "failed to count event resubmissions", err,
 		)
 
 		return nil, 0, false
@@ -1231,7 +1222,7 @@ func (h *Handlers) HandleEntrypointCreate() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -1240,9 +1231,7 @@ func (h *Handlers) HandleEntrypointCreate() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err = r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -1258,13 +1247,13 @@ func (h *Handlers) HandleEntrypointCreate() http.HandlerFunc {
 
 		err = h.db.DB().Create(entrypoint).Error
 		if err != nil {
-			h.serverError(w, "failed to create entrypoint", err)
+			h.serverError(w, r, "failed to create entrypoint", err)
 
 			return
 		}
 
 		http.Redirect(
-			w, r, "/hook/"+webhook.ID, http.StatusSeeOther,
+			w, r, "/source/"+webhook.ID, http.StatusSeeOther,
 		)
 	}
 }
@@ -1289,7 +1278,7 @@ func (h *Handlers) HandleTargetCreate() http.HandlerFunc {
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -1298,9 +1287,7 @@ func (h *Handlers) HandleTargetCreate() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err = r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -1320,7 +1307,7 @@ func (h *Handlers) processTargetCreate(
 	//
 	// Every field here is read with PostFormValue, not FormValue.
 	// FormValue falls back to the query string, which would let
-	// `POST /hook/{id}/targets?url=https://hooks.slack.com/...`
+	// `POST /source/{id}/targets?url=https://hooks.slack.com/...`
 	// configure a target from a value the request line carries — and
 	// the request line, unlike the body, is what logs, proxies,
 	// Referer headers and error trackers record.
@@ -1371,13 +1358,13 @@ func (h *Handlers) processTargetCreate(
 
 	err = h.db.DB().Create(target).Error
 	if err != nil {
-		h.serverError(w, "failed to create target", err)
+		h.serverError(w, r, "failed to create target", err)
 
 		return
 	}
 
 	http.Redirect(
-		w, r, "/hook/"+webhook.ID, http.StatusSeeOther,
+		w, r, "/source/"+webhook.ID, http.StatusSeeOther,
 	)
 }
 
@@ -1435,7 +1422,7 @@ type targetFormInput struct {
 //
 // Every field is read with PostFormValue, not FormValue. FormValue
 // falls back to the query string, which would let
-// `POST /hook/{id}/targets?url=https://hooks.slack.com/...`
+// `POST /source/{id}/targets?url=https://hooks.slack.com/...`
 // configure a target from a value the request line carries — and the
 // request line, unlike the body, is what logs, proxies, Referer
 // headers and error trackers record. The headers field is under the
@@ -1465,7 +1452,7 @@ func (h *Handlers) buildTargetConfig(
 	case database.TargetTypeSlack:
 		return h.buildSlackTargetConfig(w, r, in.URL)
 	case database.TargetTypeDatabase:
-		return h.buildDatabaseTargetConfig(w, in.Expiry)
+		return h.buildDatabaseTargetConfig(w, r, in.Expiry)
 	case database.TargetTypeLog:
 		return "", nil
 	default:
@@ -1515,7 +1502,7 @@ func (h *Handlers) buildHTTPTargetConfig(
 		return "", err
 	}
 
-	return marshalTargetConfig(w, delivery.HTTPTargetConfig{
+	return h.marshalTargetConfig(w, r, delivery.HTTPTargetConfig{
 		URL:     in.URL,
 		Headers: headers,
 		Timeout: timeout,
@@ -1537,7 +1524,7 @@ func (h *Handlers) buildSlackTargetConfig(
 		return "", err
 	}
 
-	return marshalTargetConfig(w, delivery.SlackTargetConfig{
+	return h.marshalTargetConfig(w, r, delivery.SlackTargetConfig{
 		WebhookURL: targetURL,
 	})
 }
@@ -1591,16 +1578,14 @@ func (h *Handlers) validateTargetURL(
 
 // marshalTargetConfig serialises a target configuration for storage,
 // writing a 500 itself if it cannot.
-func marshalTargetConfig(
+func (h *Handlers) marshalTargetConfig(
 	w http.ResponseWriter,
+	r *http.Request,
 	cfg any,
 ) (string, error) {
 	configBytes, err := json.Marshal(cfg)
 	if err != nil {
-		http.Error(
-			w, "Internal server error",
-			http.StatusInternalServerError,
-		)
+		h.serverError(w, r, "failed to encode target config", err)
 
 		return "", err
 	}
@@ -1616,6 +1601,7 @@ func marshalTargetConfig(
 // expiry yields an empty config (the keep-forever default).
 func (h *Handlers) buildDatabaseTargetConfig(
 	w http.ResponseWriter,
+	r *http.Request,
 	expiry string,
 ) (string, error) {
 	expiry = strings.TrimSpace(expiry)
@@ -1634,8 +1620,8 @@ func (h *Handlers) buildDatabaseTargetConfig(
 		return "", err
 	}
 
-	return marshalTargetConfig(
-		w, map[string]any{"expiry": expiry},
+	return h.marshalTargetConfig(
+		w, r, map[string]any{"expiry": expiry},
 	)
 }
 
@@ -1689,7 +1675,7 @@ func (h *Handlers) deleteChildResource(
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
@@ -1699,11 +1685,7 @@ func (h *Handlers) deleteChildResource(
 			childID, webhook.ID,
 		).Delete(model)
 		if result.Error != nil {
-			h.log.Error(errMsg, "error", result.Error)
-			http.Error(
-				w, "Internal server error",
-				http.StatusInternalServerError,
-			)
+			h.serverError(w, r, errMsg, result.Error)
 
 			return
 		}
@@ -1714,7 +1696,7 @@ func (h *Handlers) deleteChildResource(
 
 		http.Redirect(
 			w, r,
-			"/hook/"+webhook.ID,
+			"/source/"+webhook.ID,
 			http.StatusSeeOther,
 		)
 	}
@@ -1793,25 +1775,21 @@ func (h *Handlers) toggleChildResource(
 			"id = ? AND user_id = ?", sourceID, userID,
 		).First(&webhook).Error
 		if err != nil {
-			http.NotFound(w, r)
+			h.renderError(w, r, http.StatusNotFound)
 
 			return
 		}
 
 		err = toggleFn(webhook.ID, childID)
 		if err != nil {
-			h.log.Error(errMsg, "error", err)
-			http.Error(
-				w, "Internal server error",
-				http.StatusInternalServerError,
-			)
+			h.serverError(w, r, errMsg, err)
 
 			return
 		}
 
 		http.Redirect(
 			w, r,
-			"/hook/"+webhook.ID,
+			"/source/"+webhook.ID,
 			http.StatusSeeOther,
 		)
 	}

internal/handlers/source_management_test.go

@@ -105,7 +105,7 @@ func submitCreate(
 		form.Set("retention_days", *retention)
 	}
 
-	req := formRequest("/hooks/new", cookies, form, nil)
+	req := formRequest("/sources/new", cookies, form, nil)
 	w := httptest.NewRecorder()
 
 	h.HandleSourceCreateSubmit().ServeHTTP(w, req)
@@ -265,7 +265,7 @@ func TestHandleSourceCreate_PrefillsDefaultFromConstant(t *testing.T) {
 
 	w := httptest.NewRecorder()
 	env.handlers.HandleSourceCreate().ServeHTTP(
-		w, getRequest(t, "/hooks/new", env.cookies, nil),
+		w, getRequest(t, "/sources/new", env.cookies, nil),
 	)
 
 	require.Equal(t, http.StatusOK, w.Code)
@@ -402,7 +402,7 @@ func TestHandleSourceCreateSubmit_RejectedFormKeepsUserInput(
 	form.Set("description", description)
 	form.Set("retention_days", "nonsense")
 
-	req := formRequest("/hooks/new", env.cookies, form, nil)
+	req := formRequest("/sources/new", env.cookies, form, nil)
 	w := httptest.NewRecorder()
 
 	env.handlers.HandleSourceCreateSubmit().ServeHTTP(w, req)
@@ -430,7 +430,7 @@ func submitEdit(
 	form.Set("retention_days", retention)
 
 	req := formRequest(
-		"/hook/"+wh.ID+"/edit",
+		"/source/"+wh.ID+"/edit",
 		env.cookies,
 		form,
 		map[string]string{sourceIDParam: wh.ID},
@@ -512,7 +512,7 @@ func TestSourceEditForm_ForeverWebhookRoundTrips(t *testing.T) {
 	)
 
 	req := getRequest(
-		t, "/hook/"+wh.ID+"/edit", env.cookies,
+		t, "/source/"+wh.ID+"/edit", env.cookies,
 		map[string]string{sourceIDParam: wh.ID},
 	)
 	w := httptest.NewRecorder()
@@ -567,7 +567,7 @@ func TestSourceListAndDetail_ShowForeverNotTheSentinelNumber(
 
 	listW := httptest.NewRecorder()
 	env.handlers.HandleSourceList().ServeHTTP(
-		listW, getRequest(t, "/hooks", env.cookies, nil),
+		listW, getRequest(t, "/sources", env.cookies, nil),
 	)
 
 	require.Equal(t, http.StatusOK, listW.Code)
@@ -578,7 +578,7 @@ func TestSourceListAndDetail_ShowForeverNotTheSentinelNumber(
 	env.handlers.HandleSourceDetail().ServeHTTP(
 		detailW,
 		getRequest(
-			t, "/hook/"+wh.ID, env.cookies,
+			t, "/source/"+wh.ID, env.cookies,
 			map[string]string{sourceIDParam: wh.ID},
 		),
 	)

internal/handlers/target_create_query_test.go

@@ -76,11 +76,11 @@ func postTargetCreate(
 	router := chi.NewRouter()
 	router.Use(mw.Logging())
 	router.Post(
-		"/hook/{sourceID}/targets",
+		"/source/{sourceID}/targets",
 		env.handlers.HandleTargetCreate(),
 	)
 
-	target := "/hook/" + webhookID + "/targets"
+	target := "/source/" + webhookID + "/targets"
 	if query != "" {
 		target += "?" + query
 	}
@@ -114,7 +114,7 @@ func postTargetCreate(
 // regression test for the ingress leak. r.FormValue falls back to the
 // query string when a field is absent from the POST body, so
 //
-//	POST /hook/{id}/targets?url=https://hooks.slack.com/services/...
+//	POST /source/{id}/targets?url=https://hooks.slack.com/services/...
 //
 // with an empty url field used to create a working target from a value
 // carried on the request line — where logs, proxies, Referer headers

internal/handlers/target_edit.go

@@ -47,7 +47,7 @@ type targetEditView struct {
 //
 // This page is the one place the full destination URL and header
 // values are shown. It is reachable only through the
-// /hook/{sourceID} route group, which supplies RequireAuth and
+// /source/{sourceID} route group, which supplies RequireAuth and
 // NoCache, and only for a target of a webhook the session's user
 // owns; masking (delivery.TargetView) is unchanged everywhere else.
 func (h *Handlers) HandleTargetEdit() http.HandlerFunc {
@@ -88,9 +88,7 @@ func (h *Handlers) HandleTargetEditSubmit() http.HandlerFunc {
 		// middleware, which runs before CSRF parses the form.
 		err := r.ParseForm()
 		if err != nil {
-			http.Error(
-				w, "Bad request", http.StatusBadRequest,
-			)
+			h.renderError(w, r, http.StatusBadRequest)
 
 			return
 		}
@@ -157,13 +155,13 @@ func (h *Handlers) applyTargetEdit(
 
 	err = h.db.DB().Save(target).Error
 	if err != nil {
-		h.serverError(w, "failed to update target", err)
+		h.serverError(w, r, "failed to update target", err)
 
 		return
 	}
 
 	http.Redirect(
-		w, r, "/hook/"+webhook.ID, http.StatusSeeOther,
+		w, r, "/source/"+webhook.ID, http.StatusSeeOther,
 	)
 }
 
@@ -220,7 +218,7 @@ func (h *Handlers) ownedTarget(
 		chi.URLParam(r, "targetID"), webhook.ID,
 	).First(&target).Error
 	if err != nil {
-		http.NotFound(w, r)
+		h.renderError(w, r, http.StatusNotFound)
 
 		return database.Webhook{}, nil, false
 	}

internal/handlers/target_edit_test.go

@@ -42,15 +42,15 @@ const (
 func targetRouter(env *sourceTestEnv) *chi.Mux {
 	router := chi.NewRouter()
 	router.Post(
-		"/hook/{sourceID}/targets",
+		"/source/{sourceID}/targets",
 		env.handlers.HandleTargetCreate(),
 	)
 	router.Get(
-		"/hook/{sourceID}/targets/{targetID}/edit",
+		"/source/{sourceID}/targets/{targetID}/edit",
 		env.handlers.HandleTargetEdit(),
 	)
 	router.Post(
-		"/hook/{sourceID}/targets/{targetID}/edit",
+		"/source/{sourceID}/targets/{targetID}/edit",
 		env.handlers.HandleTargetEditSubmit(),
 	)
 
@@ -117,7 +117,7 @@ func seedHTTPTarget(
 
 	w := serveTarget(
 		env, http.MethodPost,
-		"/hook/"+webhook.ID+"/targets", form,
+		"/source/"+webhook.ID+"/targets", form,
 	)
 	require.Equal(t, http.StatusSeeOther, w.Code, w.Body.String())
 
@@ -188,7 +188,7 @@ func submitTargetEdit(
 ) *httptest.ResponseRecorder {
 	return serveTarget(
 		env, http.MethodPost,
-		"/hook/"+webhookID+"/targets/"+targetID+"/edit",
+		"/source/"+webhookID+"/targets/"+targetID+"/edit",
 		form,
 	)
 }
@@ -401,7 +401,7 @@ func TestHandleTargetEdit_PrefillsTheStoredValuesUnmasked(
 
 	w := serveTarget(
 		env, http.MethodGet,
-		"/hook/"+webhook.ID+"/targets/"+target.ID+"/edit",
+		"/source/"+webhook.ID+"/targets/"+target.ID+"/edit",
 		nil,
 	)
 	require.Equal(t, http.StatusOK, w.Code)
@@ -508,7 +508,7 @@ func assertEditIgnoresQueryString(
 
 	w := serveTarget(
 		env, http.MethodPost,
-		"/hook/"+webhook.ID+"/targets/"+target.ID+
+		"/source/"+webhook.ID+"/targets/"+target.ID+
 			"/edit?url="+url.QueryEscape(editReplacedURL)+
 			"&headers="+url.QueryEscape(editAuthHeader),
 		form,
@@ -592,7 +592,7 @@ func assertTargetOfAnotherWebhook404s(
 
 	get := serveTarget(
 		env, http.MethodGet,
-		"/hook/"+mine.ID+"/targets/"+target.ID+"/edit", nil,
+		"/source/"+mine.ID+"/targets/"+target.ID+"/edit", nil,
 	)
 	assert.Equal(t, http.StatusNotFound, get.Code)
 
@@ -630,7 +630,7 @@ func assertWebhookOfAnotherUser404s(
 
 	w := serveTarget(
 		env, http.MethodGet,
-		"/hook/"+other.ID+"/targets/"+target.ID+"/edit", nil,
+		"/source/"+other.ID+"/targets/"+target.ID+"/edit", nil,
 	)
 
 	assert.Equal(t, http.StatusNotFound, w.Code)

internal/handlers/target_retries_test.go

@@ -102,7 +102,7 @@ func createWithRetries(
 
 	w := serveTarget(
 		env, http.MethodPost,
-		"/hook/"+webhook.ID+"/targets",
+		"/source/"+webhook.ID+"/targets",
 		createRetriesForm(retries),
 	)
 

internal/handlers/ui_copy_test.go

@@ -54,7 +54,8 @@ func renderPage(
 }
 
 // TestNavbarUsesWebhookTerminology pins the user-visible navigation
-// label to "Webhooks" and its link to the webhook list at /hooks.
+// label to "Webhooks". The /sources route is deliberately unchanged, so
+// the assertion targets the link text rather than the href.
 func TestNavbarUsesWebhookTerminology(t *testing.T) {
 	t.Parallel()
 
@@ -94,11 +95,15 @@ func TestNavbarUsesWebhookTerminology(t *testing.T) {
 		t, body, ">Sources<",
 		"no user-visible element may still be labelled Sources",
 	)
-	assert.Contains(t, body, `href="/hooks"`)
+	assert.Contains(
+		t, body, `href="/sources"`,
+		"the /sources route itself must not change",
+	)
 }
 
 // TestEditPageUsesWebhookTerminology pins the edit page's heading and
-// its back link to the webhook page at /hook/{id}.
+// its back link. The link's href still points at /source/{id}, which is
+// intentional: only user-visible copy changes.
 func TestEditPageUsesWebhookTerminology(t *testing.T) {
 	t.Parallel()
 
@@ -125,57 +130,7 @@ func TestEditPageUsesWebhookTerminology(t *testing.T) {
 
 	assert.Contains(t, body, "Edit Webhook")
 	assert.NotContains(t, body, ">Sources<")
-	assert.Contains(t, body, `href="/hook/wh-1"`)
-}
-
-// TestEventLogPageIsCalledFullEventLog pins the one name the event log
-// page at /hook/{id}/events goes by: both links to it on the webhook
-// page, and its own heading, read "Full Event Log".
-func TestEventLogPageIsCalledFullEventLog(t *testing.T) {
-	t.Parallel()
-
-	var h *handlers.Handlers
-
-	var sess *session.Session
-
-	app := newTestApp(t, &h, &sess)
-	app.RequireStart()
-
-	t.Cleanup(app.RequireStop)
-
-	// A pointer, as in the handlers: source_detail.html calls
-	// Webhook.RetentionLabel, a pointer method. Both pages only range
-	// over their lists, and a list left out renders as empty, so the
-	// lists are left out.
-	webhook := &database.Webhook{Name: "wh", RetentionDays: 14}
-	webhook.ID = testWebhookID
-
-	detailBody := renderPage(
-		t, h, sess, "source_detail.html", map[string]any{
-			dataKeyWebhook: webhook,
-		},
-	)
-
-	assert.Contains(
-		t, detailBody,
-		`<a href="/hook/wh-1/events" class="btn-secondary">Full Event Log</a>`,
-		"the button at the top of the webhook page",
-	)
-	assert.Contains(
-		t, detailBody,
-		`<a href="/hook/wh-1/events" class="btn-text text-sm">Full Event Log</a>`,
-		"the link under recent events",
-	)
-
-	logBody := renderPage(t, h, sess, "source_logs.html", map[string]any{
-		dataKeyWebhook: webhook,
-		"TotalEvents":  int64(0),
-	})
-
-	assert.Contains(
-		t, logBody,
-		`<h1 class="text-2xl font-medium text-gray-900">Full Event Log</h1>`,
-	)
+	assert.Contains(t, body, `href="/source/wh-1"`)
 }
 
 // TestCreateFormRetentionCopyMatchesBehaviour pins the create form's
@@ -328,7 +283,7 @@ func TestEntrypointCopyButtonIsProgressiveEnhancement(t *testing.T) {
 		t, body,
 		`<code id="entrypoint-url-ep-1"`,
 	)
-	assert.Contains(t, body, "https://hooks.example.com/h/abc123")
+	assert.Contains(t, body, "https://hooks.example.com/webhook/abc123")
 	assert.Contains(
 		t, body,
 		`hidden data-copy-target="entrypoint-url-ep-1"`,

internal/handlers/webhook.go

@@ -88,14 +88,14 @@ func (h *Handlers) processWebhookRequest(
 
 	headersJSON, err := json.Marshal(r.Header)
 	if err != nil {
-		h.serverError(w, "failed to serialize headers", err)
+		h.receiverError(w, "failed to serialize headers", err)
 
 		return
 	}
 
 	targets, err := h.loadActiveTargets(entrypoint.WebhookID)
 	if err != nil {
-		h.serverError(w, "failed to query targets", err)
+		h.receiverError(w, "failed to query targets", err)
 
 		return
 	}
@@ -131,7 +131,7 @@ func (h *Handlers) lookupEntrypoint(
 		"path = ?", entrypointUUID,
 	).First(&entrypoint)
 	if result.Error != nil {
-		// The receiver is unauthenticated and /h/{uuid}
+		// The receiver is unauthenticated and /webhook/{uuid}
 		// matches any single segment, so this value is entirely
 		// client-chosen on exactly the branch where the lookup
 		// failed. DEBUG is off by default; the cap is what keeps
@@ -196,7 +196,7 @@ func (h *Handlers) createAndDeliverEvent(
 		targets,
 	)
 	if err != nil {
-		h.serverError(w, "failed to store webhook event", err)
+		h.receiverError(w, "failed to store webhook event", err)
 
 		return
 	}
@@ -204,6 +204,19 @@ func (h *Handlers) createAndDeliverEvent(
 	h.finishWebhookResponse(w, event, entrypoint, tasks)
 }
 
+// receiverError logs an error and answers the sender with a plain-text
+// 500. The receiver's answers are for programs, so it never sends the
+// error page the web UI uses.
+func (h *Handlers) receiverError(
+	w http.ResponseWriter, msg string, err error,
+) {
+	h.log.Error(msg, "error", err)
+	http.Error(
+		w, "Internal server error",
+		http.StatusInternalServerError,
+	)
+}
+
 // eventSource carries the fields a new event is built from. The
 // receiver fills it from the live request; the resubmit handler fills
 // it from a stored event. Both then go through createAndFanOut, so an

internal/logfield/logfield_test.go

@@ -201,7 +201,7 @@ func TestTruncate_LeavesShortValuesAlone(t *testing.T) {
 	t.Parallel()
 
 	for _, s := range []string{
-		"", "GET", "/hook/abc/edit", "Mozilla/5.0 (X11)",
+		"", "GET", "/source/abc/edit", "Mozilla/5.0 (X11)",
 	} {
 		assert.Equal(t, s, logfield.Truncate(s, budget))
 	}

internal/middleware/accesslog_test.go

@@ -119,7 +119,7 @@ func accessLogRouter(m *middleware.Middleware) *chi.Mux {
 	)
 
 	router.HandleFunc(
-		"/h/{uuid}",
+		"/webhook/{uuid}",
 		func(w http.ResponseWriter, r *http.Request) {
 			// Stands in for the real handler: an unknown entrypoint
 			// UUID 404s, a known one succeeds.
@@ -271,11 +271,11 @@ func TestAccessLog_InventedReceiverPathsLogRoutePattern(t *testing.T) {
 	assertFloodIsBounded(
 		t,
 		func(i int) string {
-			return "/h/" + attackerMarker +
+			return "/webhook/" + attackerMarker +
 				strings.Repeat("x", i) + "?q=" + attackerMarker
 		},
 		http.StatusNotFound,
-		"/h/{uuid}",
+		"/webhook/{uuid}",
 	)
 }
 
@@ -346,10 +346,10 @@ type sizeCase struct {
 func lineSizeCases() map[string]sizeCase {
 	cases := map[string]sizeCase{
 		"oversized path segment": {
-			target: "/h/" + attackerMarker +
+			target: "/webhook/" + attackerMarker +
 				strings.Repeat("x", oversizedSegmentBytes),
 			wantStatus: http.StatusNotFound,
-			wantURL:    "/h/{uuid}",
+			wantURL:    "/webhook/{uuid}",
 			bound:      maxLineBytes,
 		},
 		// /.well-known/healthcheck answers 200 to anyone and has no
@@ -605,14 +605,14 @@ func TestAccessLog_SuccessKeepsConcretePathAndRedactsQuery(
 	router := accessLogRouter(m)
 
 	assert.Equal(
-		t, http.StatusOK, get(t, router, "/h/known?src=ci"),
+		t, http.StatusOK, get(t, router, "/webhook/known?src=ci"),
 	)
 
 	// The path resolved against a stored entrypoint, so it stays. The
 	// query never does: see TestAccessLog_UnauthenticatedSuccess...
 	entries := accessLogEntries(t, buf)
 	require.Len(t, entries, 1)
-	assert.Equal(t, "/h/known?(redacted)", entries[0]["url"])
+	assert.Equal(t, "/webhook/known?(redacted)", entries[0]["url"])
 	assert.NotContains(t, buf.String(), "src=ci")
 }
 
@@ -640,7 +640,7 @@ func TestAccessLog_RetainsEveryOtherField(t *testing.T) {
 	assert.Equal(
 		t,
 		http.StatusNotFound,
-		get(t, router, "/h/"+attackerMarker),
+		get(t, router, "/webhook/"+attackerMarker),
 	)
 
 	entries := accessLogEntries(t, buf)

internal/middleware/csrf.go

@@ -19,7 +19,7 @@ func CSRFToken(r *http.Request) string {
 // key to sign a CSRF cookie and validates a masked token submitted via
 // the "csrf_token" form field (or the "X-CSRF-Token" header) on
 // POST/PUT/PATCH/DELETE requests. Requests with an invalid or missing
-// token receive a 403 Forbidden response.
+// token are logged and answered by forbidden, which must write the 403.
 //
 // The middleware detects the client-facing transport protocol
 // per-request via reqtls.IsTLS, the single TLS predicate the session
@@ -36,12 +36,14 @@ func CSRFToken(r *http.Request) string {
 // Two gorilla/csrf instances are maintained — one with Secure cookies
 // (for TLS) and one without (for plaintext HTTP) — because the
 // csrf.Secure option is set at creation time, not per-request.
-func (m *Middleware) CSRF() func(http.Handler) http.Handler {
+func (m *Middleware) CSRF(
+	forbidden http.Handler,
+) func(http.Handler) http.Handler {
 	csrfErrorHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		// CSRF is registered ahead of RequireAuth on every route
 		// group that uses it, so this WARN is reachable by an
 		// unauthenticated client: a POST with no token to
-		// /hook/<any length of any text>/edit lands here. The
+		// /source/<any length of any text>/edit lands here. The
 		// method and path are capped against the same budgets as
 		// the access log. remote_addr is set by net/http from the
 		// accepted connection rather than by the client, and
@@ -57,7 +59,7 @@ func (m *Middleware) CSRF() func(http.Handler) http.Handler {
 			"remote_addr", r.RemoteAddr,
 			"reason", csrf.FailureReason(r),
 		)
-		http.Error(w, "Forbidden - invalid CSRF token", http.StatusForbidden)
+		forbidden.ServeHTTP(w, r)
 	})
 
 	key := m.session.GetKey()

internal/middleware/csrf_test.go

@@ -18,6 +18,12 @@ import (
 // csrfCookieName is the gorilla/csrf cookie name.
 const csrfCookieName = "_gorilla_csrf"
 
+// forbidden stands in for the error page the server hands CSRF to
+// answer a refused request with.
+func forbidden(w http.ResponseWriter, _ *http.Request) {
+	w.WriteHeader(http.StatusForbidden)
+}
+
 // csrfGetToken performs a GET request through the CSRF middleware
 // and returns the token and cookies.
 func csrfGetToken(
@@ -98,7 +104,7 @@ func TestCSRF_GETSetsToken(t *testing.T) {
 
 	var gotToken string
 
-	handler := m.CSRF()(http.HandlerFunc(
+	handler := m.CSRF(http.HandlerFunc(forbidden))(http.HandlerFunc(
 		func(_ http.ResponseWriter, r *http.Request) {
 			gotToken = middleware.CSRFToken(r)
 		},
@@ -120,7 +126,7 @@ func TestCSRF_POSTWithValidToken(t *testing.T) {
 	t.Parallel()
 
 	m, _ := testMiddleware(t, config.EnvironmentDev)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	getReq := httptest.NewRequestWithContext(
 		context.Background(),
@@ -152,7 +158,7 @@ func csrfPOSTWithoutTokenTest(
 	t.Helper()
 
 	m, _ := testMiddleware(t, env)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	// GET to establish the CSRF cookie
 	getHandler := csrfMW(http.HandlerFunc(
@@ -209,7 +215,7 @@ func TestCSRF_POSTWithInvalidToken(t *testing.T) {
 	t.Parallel()
 
 	m, _ := testMiddleware(t, config.EnvironmentDev)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	// GET to establish the CSRF cookie
 	getHandler := csrfMW(http.HandlerFunc(
@@ -265,7 +271,7 @@ func TestCSRF_GETDoesNotValidate(t *testing.T) {
 
 	var called bool
 
-	handler := m.CSRF()(http.HandlerFunc(
+	handler := m.CSRF(http.HandlerFunc(forbidden))(http.HandlerFunc(
 		func(_ http.ResponseWriter, _ *http.Request) {
 			called = true
 		},
@@ -328,7 +334,7 @@ func csrfTookStrictPath(
 	t.Helper()
 
 	m, _ := testMiddleware(t, env)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	newReq := func(method string) *http.Request {
 		r := httptest.NewRequestWithContext(
@@ -477,7 +483,7 @@ func TestCSRF_ProdMode_PlaintextHTTP_POSTWithValidToken(
 	t.Parallel()
 
 	m, _ := testMiddleware(t, config.EnvironmentProd)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	getReq := httptest.NewRequestWithContext(
 		context.Background(),
@@ -517,7 +523,7 @@ func TestCSRF_ProdMode_BehindProxy_POSTWithValidToken(
 	t.Parallel()
 
 	m, _ := testMiddleware(t, config.EnvironmentProd)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	getReq := httptest.NewRequestWithContext(
 		context.Background(),
@@ -562,7 +568,7 @@ func TestCSRF_ProdMode_DirectTLS_POSTWithValidToken(
 	t.Parallel()
 
 	m, _ := testMiddleware(t, config.EnvironmentProd)
-	csrfMW := m.CSRF()
+	csrfMW := m.CSRF(http.HandlerFunc(forbidden))
 
 	getReq := httptest.NewRequestWithContext(
 		context.Background(),

internal/middleware/logbound_test.go

@@ -260,7 +260,9 @@ func logSites() map[string]logSite {
 			) http.Handler {
 				t.Helper()
 
-				return m.CSRF()(unreachable(t))
+				return m.CSRF(http.HandlerFunc(forbidden))(
+					unreachable(t),
+				)
 			},
 			send:       postNoToken,
 			wantStatus: http.StatusForbidden,
@@ -383,7 +385,7 @@ func TestLogLines_ClientChosenPathDoesNotSizeTheLine(t *testing.T) {
 						t, newHandler,
 					)
 
-					path := "/hook/" +
+					path := "/source/" +
 						oversizedPathSegment(fill) + "/edit"
 
 					assert.Equal(
@@ -434,7 +436,7 @@ func TestLoginThrottle_LogLineDoesNotTrackPathSize(t *testing.T) {
 				req := httptest.NewRequestWithContext(
 					context.Background(),
 					http.MethodPost,
-					"/hook/"+
+					"/source/"+
 						oversizedPathSegment(fill)+"/login",
 					nil,
 				)
@@ -499,7 +501,7 @@ func TestMaxBodySize_FloodOfOversizePathsDoesNotGrowTheLog(
 							http.StatusRequestEntityTooLarge,
 							postOversize(
 								h,
-								"/hook/"+segment(i)+"/edit",
+								"/source/"+segment(i)+"/edit",
 							),
 						)
 					}

internal/middleware/loginguard.go

@@ -108,10 +108,10 @@ type failureWindow struct {
 //
 // A limiter that spends budget on arrival cannot protect a
 // single-admin product: behind the reverse proxy the deployment
-// requires, with TRUSTED_PROXIES unset, every client keys on the
-// proxy, so a stranger trickling five POSTs a minute keeps the one
-// bucket full and the operator's own correct password is answered 429
-// forever. There is no second administrative path.
+// requires, when TRUSTED_PROXIES does not cover it, every client
+// keys on the proxy, so a stranger trickling five POSTs a minute
+// keeps the one bucket full and the operator's own correct password
+// is answered 429 forever. There is no second administrative path.
 //
 // So budget is spent only by a FAILED verification. A correct
 // password is never throttled, whatever the counters say, which is

internal/middleware/metrics.go

@@ -40,7 +40,7 @@ const unmatchedMethod = unmatchedRoute
 //
 // The pattern is what bounds the label's domain to the routes the
 // service registers. The path does not bound it at all — every byte
-// after /h/ is client-chosen, so labelling by path lets any
+// after /webhook/ is client-chosen, so labelling by path lets any
 // unauthenticated client mint permanent series at will, and publishes
 // the entrypoint UUID (the receiver's only credential) in the scrape
 // while doing it.

internal/middleware/metrics_method_test.go

@@ -50,7 +50,7 @@ func realMethods() []string {
 // dimension varying, so any series growth a probe produces is the
 // method label's and nothing else's.
 func methodProbePath() string {
-	return "/h/" + uuid.NewString()
+	return "/webhook/" + uuid.NewString()
 }
 
 // inventedMethods returns n distinct RFC 9110 method tokens that no

internal/middleware/metrics_test.go

@@ -28,7 +28,7 @@ const (
 
 	// receiverRoutePattern is the one handler label every receiver
 	// request must produce, however the client varies the path.
-	receiverRoutePattern = "/h/{uuid}"
+	receiverRoutePattern = "/webhook/{uuid}"
 
 	// okRoute is a static route used to pin that the response-writer
 	// interceptor still reports status and size after the handler id
@@ -143,13 +143,13 @@ func drivePaths(
 	return drive(t, h, probes)
 }
 
-// receiverPaths returns n distinct /h/ paths, each naming a
+// receiverPaths returns n distinct /webhook/ paths, each naming a
 // fresh UUID exactly as an unauthenticated flood would.
 func receiverPaths(n int) []string {
 	paths := make([]string, 0, n)
 
 	for range n {
-		paths = append(paths, "/h/"+uuid.NewString())
+		paths = append(paths, "/webhook/"+uuid.NewString())
 	}
 
 	return paths
@@ -220,7 +220,7 @@ func keys(set map[string]struct{}) []string {
 
 // TestMetrics_DistinctReceiverPathsMintOneLabelSet is the direct
 // assertion the issue asks for: N requests to N distinct
-// /h/<uuid> paths must produce exactly ONE handler label, the
+// /webhook/<uuid> paths must produce exactly ONE handler label, the
 // route pattern. Before the fix this produced N of them.
 func TestMetrics_DistinctReceiverPathsMintOneLabelSet(t *testing.T) {
 	t.Parallel()
@@ -250,7 +250,7 @@ func TestMetrics_DistinctReceiverPathsMintOneLabelSet(t *testing.T) {
 	// The scrape must not republish the UUIDs it was driven with.
 	// They are the receiver's only credential.
 	for _, p := range paths {
-		id := strings.TrimPrefix(p, "/h/")
+		id := strings.TrimPrefix(p, "/webhook/")
 		for label := range labels {
 			assert.NotContains(
 				t, label, id,
@@ -354,7 +354,7 @@ func TestMetrics_UnmatchedPathsCollapseToTheSentinel(t *testing.T) {
 		if i%2 == 0 {
 			paths = append(paths, "/"+id)
 		} else {
-			paths = append(paths, "/h/"+id+"/"+id)
+			paths = append(paths, "/webhook/"+id+"/"+id)
 		}
 	}
 

internal/middleware/middleware.go

@@ -257,7 +257,7 @@ func concreteLogURL(r *http.Request) string {
 //
 // 3xx and 4xx responses get the chi route pattern instead. Those are
 // the outcomes an unauthenticated client drives for free: 404 or 429
-// on any invented /h/ path, 303 to the login page on any
+// on any invented /webhook/ path, 303 to the login page on any
 // invented /user/ path. Logging the concrete URL there lets a flood
 // write attacker-chosen text, of attacker-chosen length, into the
 // operator's log at one line per request. The pattern comes from the
@@ -560,7 +560,7 @@ func (s *Middleware) MaxBodySize(
 				// internal/server/routes.go), so an
 				// unauthenticated client reaches it with a path
 				// of its own choosing and its own length —
-				// POST /hook/<8 KB>/edit with an oversize
+				// POST /source/<8 KB>/edit with an oversize
 				// declared Content-Length costs nothing to
 				// send. At WARN, on by default, that is a
 				// write into the operator's log sized by the

internal/middleware/middleware_test.go

@@ -640,7 +640,7 @@ func TestNoCache_SetsHeaders(t *testing.T) {
 
 	req := httptest.NewRequestWithContext(
 		context.Background(),
-		http.MethodGet, "/hooks", nil,
+		http.MethodGet, "/sources", nil,
 	)
 	w := httptest.NewRecorder()
 

internal/middleware/ratelimit.go

@@ -63,7 +63,7 @@ const (
 
 	// receiverAggregateMultiplier scales the configured
 	// per-entrypoint receiver limit into the aggregate limit one
-	// client IP may spend across the whole /h/* route. Ten
+	// client IP may spend across the whole /webhook/* route. Ten
 	// entrypoints' worth lets a single sender address drive several
 	// entrypoints at their full rate, while still capping what one
 	// address costs the unauthenticated receiver.
@@ -123,9 +123,8 @@ func bucketKey(addr netip.Addr) string {
 	return prefix.String()
 }
 
-// isTrustedProxy reports whether addr belongs to a network the
-// operator listed in TRUSTED_PROXIES. The list is empty by default,
-// so by default nothing is trusted.
+// isTrustedProxy reports whether addr belongs to a network in
+// TRUSTED_PROXIES, which by default is the RFC 1918 private ranges.
 func (m *Middleware) isTrustedProxy(addr netip.Addr) bool {
 	for _, prefix := range m.params.Config.TrustedProxies {
 		if prefix.Contains(addr) {
@@ -390,7 +389,7 @@ func (m *Middleware) postRateLimit(
 // It is Config.ReceiverRateLimit requests per minute.
 //
 // That limit alone bounds nothing in aggregate. The route pattern
-// /h/{uuid} matches any single segment, so a client that
+// /webhook/{uuid} matches any single segment, so a client that
 // invents a fresh path per request mints a fresh bucket per request
 // and never refills one — and every such request still reaches the
 // handler's entrypoint lookup before it 404s. The outer limit is

internal/middleware/ratelimit_test.go

@@ -275,7 +275,7 @@ func TestReceiverRateLimit_LimitsPerIPAndPath(t *testing.T) {
 	// pass.
 	for i := range limit {
 		w := receiverPost(
-			handler, "9.9.9.9:1234", "/h/uuid-a",
+			handler, "9.9.9.9:1234", "/webhook/uuid-a",
 		)
 		assert.Equal(
 			t, http.StatusOK, w.Code,
@@ -286,7 +286,7 @@ func TestReceiverRateLimit_LimitsPerIPAndPath(t *testing.T) {
 	// The next request over the limit is rejected with a 429
 	// carrying a Retry-After header.
 	w := receiverPost(
-		handler, "9.9.9.9:1234", "/h/uuid-a",
+		handler, "9.9.9.9:1234", "/webhook/uuid-a",
 	)
 	assert.Equal(t, http.StatusTooManyRequests, w.Code)
 	assert.NotEmpty(
@@ -296,7 +296,7 @@ func TestReceiverRateLimit_LimitsPerIPAndPath(t *testing.T) {
 
 	// The same IP is not limited on a different entrypoint.
 	w = receiverPost(
-		handler, "9.9.9.9:1234", "/h/uuid-b",
+		handler, "9.9.9.9:1234", "/webhook/uuid-b",
 	)
 	assert.Equal(
 		t, http.StatusOK, w.Code,
@@ -305,7 +305,7 @@ func TestReceiverRateLimit_LimitsPerIPAndPath(t *testing.T) {
 
 	// A different IP is not limited on the same entrypoint.
 	w = receiverPost(
-		handler, "8.8.8.8:1234", "/h/uuid-a",
+		handler, "8.8.8.8:1234", "/webhook/uuid-a",
 	)
 	assert.Equal(
 		t, http.StatusOK, w.Code,
@@ -322,7 +322,7 @@ func TestReceiverRateLimit_CountsEveryMethod(t *testing.T) {
 	const (
 		limit = 2
 		ip    = "7.7.7.7:1234"
-		path  = "/h/uuid-c"
+		path  = "/webhook/uuid-c"
 	)
 
 	handler := receiverLimitedHandler(t, limit)
@@ -384,8 +384,8 @@ const (
 	// trustedProxyCIDR is the proxy network the forwarded-path
 	// tests configure, and trustedPeer an address inside it. A
 	// production deployment is required to run behind a reverse
-	// proxy with TRUSTED_PROXIES set, so this is the shape the
-	// bucketing has to hold in.
+	// proxy that TRUSTED_PROXIES covers, either by the default or by
+	// a set value, so this is the shape the bucketing has to hold in.
 	trustedProxyCIDR = "10.0.0.0/8"
 	trustedPeer      = "10.0.0.1:44444"
 )
@@ -426,8 +426,8 @@ func assertSharedBucket(
 }
 
 // TestRateLimitKey_SpoofedForwardedFromUntrustedPeer is the test
-// this gating exists for: with no trusted proxies configured (the
-// default), a client that rotates a forwarded header on every
+// this gating exists for: from a peer that is not a trusted
+// proxy, a client that rotates a forwarded header on every
 // request must stay in one bucket. If forwarded headers were
 // trusted unconditionally, each spoofed value would mint a fresh
 // bucket and the limit would stop no one.
@@ -715,7 +715,7 @@ func TestReceiverRateLimit_LimitsAggregateAcrossInventedPaths(
 	// none of them shares a per-entrypoint bucket with another.
 	for i := range aggregate {
 		w := receiverPost(
-			handler, ip, fmt.Sprintf("/h/invented-%d", i),
+			handler, ip, fmt.Sprintf("/webhook/invented-%d", i),
 		)
 		assert.Equal(
 			t, http.StatusOK, w.Code,
@@ -724,17 +724,17 @@ func TestReceiverRateLimit_LimitsAggregateAcrossInventedPaths(
 	}
 
 	w := receiverPost(
-		handler, ip, fmt.Sprintf("/h/invented-%d", aggregate),
+		handler, ip, fmt.Sprintf("/webhook/invented-%d", aggregate),
 	)
 	assert.Equal(
 		t, http.StatusTooManyRequests, w.Code,
 		"a client must not be able to raise its aggregate rate "+
-			"against /h/* by varying the path",
+			"against /webhook/* by varying the path",
 	)
 
 	// The aggregate limit is still per client IP: exhausting one
 	// address must not throttle another.
-	w = receiverPost(handler, "6.6.6.7:1234", "/h/invented-0")
+	w = receiverPost(handler, "6.6.6.7:1234", "/webhook/invented-0")
 	assert.Equal(
 		t, http.StatusOK, w.Code,
 		"a different client IP must not be affected",
@@ -771,7 +771,7 @@ func TestReceiverRateLimit_RejectedRequestsCountTowardAggregate(
 	// limit requests are served; the rest are rejected by the
 	// per-entrypoint limiter but still count against the aggregate.
 	for i := range aggregate {
-		w := receiverPost(handler, ip, "/h/exhausted")
+		w := receiverPost(handler, ip, "/webhook/exhausted")
 
 		want := http.StatusTooManyRequests
 		if i < limit {
@@ -784,7 +784,7 @@ func TestReceiverRateLimit_RejectedRequestsCountTowardAggregate(
 		)
 	}
 
-	w := receiverPost(handler, ip, "/h/never-used")
+	w := receiverPost(handler, ip, "/webhook/never-used")
 	assert.Equal(
 		t, http.StatusTooManyRequests, w.Code,
 		"requests rejected per entrypoint must still count "+
@@ -823,7 +823,7 @@ func TestReceiverRateLimit_IgnoresForwardedFromUntrustedPeer(
 	const (
 		limit = 3
 		peer  = "203.0.113.10:44444"
-		path  = "/h/uuid-d"
+		path  = "/webhook/uuid-d"
 	)
 
 	handler := receiverLimitedHandler(t, limit)
@@ -1097,8 +1097,9 @@ func TestPostRateLimit_IPv4IndependentPerAddress(t *testing.T) {
 // that arrives from trustedPeer — a configured trusted proxy — and
 // names forwarded as its client in X-Forwarded-For. That is the
 // production path: a deployment is required to run behind a reverse
-// proxy with TRUSTED_PROXIES set, so the forwarded address, not the
-// peer, is what the limiters bucket on there.
+// proxy that TRUSTED_PROXIES covers, either by the default or by a
+// set value, so the forwarded address, not the peer, is what the
+// limiters bucket on there.
 func forwardedKeyFor(
 	t *testing.T, m *middleware.Middleware, forwarded string,
 ) string {
@@ -1178,9 +1179,9 @@ func TestRateLimitKey_ForwardedIPv6BucketsByPrefix(t *testing.T) {
 //
 // Every existing test of this fallback uses an IPv4 proxy, where
 // bucketKey is the identity function, so replacing the call with
-// peer.String() leaves the whole suite green. Only operator-listed
-// addresses reach this line and the fallback is fail-closed, so this
-// pins behaviour rather than fixing a defect.
+// peer.String() leaves the whole suite green. Only addresses inside
+// TRUSTED_PROXIES reach this line and the fallback is fail-closed, so
+// this pins behaviour rather than fixing a defect.
 func TestRateLimitKey_TrustedPeerUnusableForwardedMasksPeer(
 	t *testing.T,
 ) {

internal/middleware/recoverer.go

@@ -109,7 +109,8 @@ func (w *recoverResponseWriter) Unwrap() http.ResponseWriter {
 
 // Recoverer returns middleware that turns a handler panic into one
 // structured ERROR record and a 500, rather than a dropped
-// connection.
+// connection. The 500 is page when page is not nil, and plain text
+// when it is nil or when page panics before writing anything.
 //
 // It replaces chi's middleware.Recoverer, which does neither on a
 // current Go release. chi v1.5.5's pretty-printer scans the stack for
@@ -138,7 +139,9 @@ func (w *recoverResponseWriter) Unwrap() http.ResponseWriter {
 // set before panicking, because a request that failed must not hand
 // the client a credential; every other header is left to http.Error.
 // See https://git.eeqj.de/sneak/webhooker/issues/193.
-func (s *Middleware) Recoverer() func(http.Handler) http.Handler {
+func (s *Middleware) Recoverer(
+	page http.Handler,
+) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(
 			w http.ResponseWriter,
@@ -171,6 +174,14 @@ func (s *Middleware) Recoverer() func(http.Handler) http.Handler {
 
 				rw.Header().Del("Set-Cookie")
 
+				if page != nil {
+					s.servePage(rw, r, page)
+				}
+
+				if rw.committed {
+					return
+				}
+
 				http.Error(
 					rw,
 					http.StatusText(
@@ -185,6 +196,27 @@ func (s *Middleware) Recoverer() func(http.Handler) http.Handler {
 	}
 }
 
+// servePage answers with page. A panic in page itself is logged and
+// recovered here, so the Recoverer can still send its plain 500.
+func (s *Middleware) servePage(
+	w http.ResponseWriter,
+	r *http.Request,
+	page http.Handler,
+) {
+	defer func() {
+		rvr := recover()
+		if rvr != nil {
+			s.log.Error("error page panic",
+				"panic", logfield.Truncate(
+					fmt.Sprint(rvr), maxPanicValueBytes,
+				),
+			)
+		}
+	}()
+
+	page.ServeHTTP(w, r)
+}
+
 // logPanic writes the record. Every field it can grow is truncated to
 // a fixed budget, so MaxPanicLogLineBytes holds.
 //

internal/middleware/recoverer_test.go

@@ -76,7 +76,7 @@ func newRecovererProbe(
 	// Logging outside so the recovered 500 is the status it records.
 	router.Use(chimw.RequestID)
 	router.Use(m.Logging())
-	router.Use(m.Recoverer())
+	router.Use(m.Recoverer(nil))
 	router.Get("/probe", handler)
 
 	serverErrors := new(bytes.Buffer)
@@ -637,7 +637,7 @@ func TestRecovererKeepsResponseControllerWorking(t *testing.T) {
 
 	m, _ := capturingMiddleware(t)
 
-	handler := m.Recoverer()(http.HandlerFunc(
+	handler := m.Recoverer(nil)(http.HandlerFunc(
 		func(w http.ResponseWriter, _ *http.Request) {
 			_, _ = w.Write([]byte("chunk"))
 
@@ -672,3 +672,59 @@ func TestRecovererKeepsResponseControllerWorking(t *testing.T) {
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
 	assert.Equal(t, "chunk", string(body))
 }
+
+// TestRecovererAnswersWithThePage covers a recoverer given a page:
+// the panic is logged as before, and the 500 is that page.
+func TestRecovererAnswersWithThePage(t *testing.T) {
+	t.Parallel()
+
+	m, logs := capturingMiddleware(t)
+
+	page := http.HandlerFunc(
+		func(w http.ResponseWriter, _ *http.Request) {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte("the error page"))
+		},
+	)
+
+	w := httptest.NewRecorder()
+	m.Recoverer(page)(http.HandlerFunc(panicProbe)).ServeHTTP(
+		w, httptest.NewRequestWithContext(
+			t.Context(), http.MethodGet, "/", nil,
+		),
+	)
+
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
+	assert.Equal(t, "the error page", w.Body.String())
+	assert.Contains(t, logs.String(), `"msg":"handler panic"`)
+	assert.Contains(t, logs.String(), panicMarker)
+}
+
+// TestRecovererFallsBackWhenThePagePanics covers a page that panics
+// before writing anything: both panics are logged, and the client
+// still gets the plain 500.
+func TestRecovererFallsBackWhenThePagePanics(t *testing.T) {
+	t.Parallel()
+
+	m, logs := capturingMiddleware(t)
+
+	const pagePanic = "QQERRORPAGEPANICQQ"
+
+	page := http.HandlerFunc(
+		func(http.ResponseWriter, *http.Request) {
+			panic(pagePanic)
+		},
+	)
+
+	w := httptest.NewRecorder()
+	m.Recoverer(page)(http.HandlerFunc(panicProbe)).ServeHTTP(
+		w, httptest.NewRequestWithContext(
+			t.Context(), http.MethodGet, "/", nil,
+		),
+	)
+
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
+	assert.Equal(t, "Internal Server Error\n", w.Body.String())
+	assert.Contains(t, logs.String(), panicMarker)
+	assert.Contains(t, logs.String(), pagePanic)
+}

internal/server/error_page_test.go

@@ -0,0 +1,220 @@
+package server_test
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strconv"
+	"testing"
+
+	"github.com/getsentry/sentry-go"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"sneak.berlin/go/webhooker/internal/config"
+	"sneak.berlin/go/webhooker/internal/server"
+)
+
+// The link back the error page offers: to the webhook list for a
+// signed-in user, to sign-in for anyone else.
+const (
+	backToWebhooks = `<a href="/sources" class="btn-secondary">` +
+		`Back to webhooks</a>`
+	backToSignIn = `<a href="/pages/login" class="btn-primary">` +
+		`Sign in</a>`
+)
+
+// assertErrorPage checks that w is the error page for status, in the
+// normal layout, offering link.
+func assertErrorPage(
+	t *testing.T,
+	w *httptest.ResponseRecorder,
+	status int,
+	link string,
+) {
+	t.Helper()
+
+	body := w.Body.String()
+
+	assert.Equal(t, status, w.Code)
+	assert.Equal(
+		t, "text/html; charset=utf-8", w.Header().Get("Content-Type"),
+	)
+	assert.Equal(t, "no-store", w.Header().Get("Cache-Control"))
+	assert.Contains(t, body, `<nav class="app-bar"`)
+	assert.Contains(
+		t, body, strconv.Itoa(status)+" "+http.StatusText(status),
+	)
+	assert.Contains(t, body, link)
+}
+
+func TestErrorPage_DeletedWebhook(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	userID, _ := env.seedUser(t, "owner", "somepassword")
+	cookies := env.authCookies(t, userID, "owner")
+
+	wh := env.seedWebhook(t, userID)
+	require.NoError(t, env.db.DB().Delete(wh).Error)
+
+	w := env.get("/source/"+wh.ID, cookies)
+
+	assertErrorPage(t, w, http.StatusNotFound, backToWebhooks)
+}
+
+func TestErrorPage_DeletedTarget(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	userID, _ := env.seedUser(t, "owner", "somepassword")
+	cookies := env.authCookies(t, userID, "owner")
+
+	wh := env.seedWebhook(t, userID)
+	tgt := env.seedTarget(t, wh.ID)
+	require.NoError(t, env.db.DB().Delete(tgt).Error)
+
+	w := env.get(
+		"/source/"+wh.ID+"/targets/"+tgt.ID+"/edit", cookies,
+	)
+
+	assertErrorPage(t, w, http.StatusNotFound, backToWebhooks)
+}
+
+func TestErrorPage_UnknownPath(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	userID, _ := env.seedUser(t, "owner", "somepassword")
+	cookies := env.authCookies(t, userID, "owner")
+
+	assertErrorPage(
+		t, env.get("/no-such-page", nil),
+		http.StatusNotFound, backToSignIn,
+	)
+
+	// Outside every route group there is no form token, so the
+	// page leaves out the logout form rather than offer one that
+	// would be refused.
+	w := env.get("/no-such-page", cookies)
+	assertErrorPage(t, w, http.StatusNotFound, backToWebhooks)
+	assert.NotContains(t, w.Body.String(), `action="/pages/logout"`)
+
+	// Inside a route group the page has a token, and logout works.
+	wh := env.seedWebhook(t, userID)
+	w = env.get("/source/"+wh.ID+"/no-such-page", cookies)
+	assertErrorPage(t, w, http.StatusNotFound, backToWebhooks)
+	assert.Contains(t, w.Body.String(), `action="/pages/logout"`)
+}
+
+func TestErrorPage_BadCSRFToken(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	form := url.Values{}
+	form.Set("username", "someone")
+	form.Set("password", "irrelevant")
+	form.Set("csrf_token", "not-a-token")
+
+	assertErrorPage(
+		t, env.post("/pages/login", form, nil),
+		http.StatusForbidden, backToSignIn,
+	)
+
+	userID, _ := env.seedUser(t, "owner", "somepassword")
+	cookies := env.authCookies(t, userID, "owner")
+	wh := env.seedWebhook(t, userID)
+
+	edit := url.Values{}
+	edit.Set("name", "renamed")
+
+	assertErrorPage(
+		t, env.post("/source/"+wh.ID+"/edit", edit, cookies),
+		http.StatusForbidden, backToWebhooks,
+	)
+}
+
+// TestErrorPage_PanicOnAdminPage sends a panicking handler in an
+// admin page route group through the real router, with error
+// tracking on: the client gets the 500 error page, and the tracker
+// still gets the panic, once. The same panic outside the admin page
+// route groups keeps the plain 500.
+func TestErrorPage_PanicOnAdminPage(t *testing.T) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	transport := &captureTransport{}
+
+	opts := server.SentryClientOptionsForTest(
+		"https://public@sentry.invalid/1", "webhooker-test",
+	)
+	opts.Transport = transport
+
+	client, err := sentry.NewClient(opts)
+	require.NoError(t, err)
+
+	serve := func(router http.Handler, path string) *httptest.ResponseRecorder {
+		req := httptest.NewRequestWithContext(
+			sentry.SetHubOnContext(
+				context.Background(),
+				sentry.NewHub(client, sentry.NewScope()),
+			),
+			http.MethodGet, path, nil,
+		)
+
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, req)
+
+		return w
+	}
+
+	w := serve(
+		server.NewRouterWithPageProbeForTest(
+			env.log.Get(), env.cfg, env.mw, env.hnd,
+			true, panicProbeHandler,
+		),
+		server.PageProbePattern,
+	)
+	assertErrorPage(t, w, http.StatusInternalServerError, backToSignIn)
+
+	w = serve(
+		server.NewRouterWithProbeForTest(
+			env.log.Get(), env.cfg, env.mw, env.hnd,
+			true, panicProbeHandler,
+		),
+		server.ProbePattern,
+	)
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
+	assert.Equal(t, "Internal Server Error\n", w.Body.String())
+
+	require.Len(t, transport.events, 2)
+
+	for _, event := range transport.events {
+		assert.Contains(t, marshalEvent(t, event), panicProbeMarker)
+	}
+}
+
+// TestErrorPage_ReceiverStaysPlain pins that the error page is for
+// the web UI only: a sender posting to an entrypoint that does not
+// exist still gets the plain-text answer.
+func TestErrorPage_ReceiverStaysPlain(t *testing.T) {
+	t.Parallel()
+
+	// newTestEnv leaves the receiver rate limit at zero, which
+	// refuses every request before it reaches the receiver.
+	env := newTestEnvWithConfig(t, &config.Config{
+		DataDir:           t.TempDir(),
+		Environment:       config.EnvironmentDev,
+		ReceiverRateLimit: 10,
+	})
+
+	w := env.post("/webhook/no-such-entrypoint", url.Values{}, nil)
+
+	assert.Equal(t, http.StatusNotFound, w.Code)
+	assert.Equal(t, "404 page not found\n", w.Body.String())
+}

internal/server/export_test.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/getsentry/sentry-go"
+	"github.com/go-chi/chi"
 	"sneak.berlin/go/webhooker/internal/config"
 	"sneak.berlin/go/webhooker/internal/handlers"
 	"sneak.berlin/go/webhooker/internal/middleware"
@@ -101,3 +102,39 @@ func NewRouterWithProbeForTest(
 
 	return s.router
 }
+
+// PageProbePattern is where NewRouterWithPageProbeForTest serves its
+// probe: inside the /pages route group, the admin page group a
+// request reaches without signing in.
+const PageProbePattern = "/pages/probe"
+
+// NewRouterWithPageProbeForTest is NewRouterWithProbeForTest with the
+// probe added to the /pages route group once SetupRoutes has built
+// it, so the probe runs behind that group's own middleware exactly as
+// the group's real routes do.
+func NewRouterWithPageProbeForTest(
+	log *slog.Logger,
+	cfg *config.Config,
+	mw *middleware.Middleware,
+	h *handlers.Handlers,
+	sentryEnabled bool,
+	probe http.HandlerFunc,
+) http.Handler {
+	s := &Server{
+		log:    log,
+		mw:     mw,
+		h:      h,
+		params: ServerParams{Config: cfg},
+	}
+	s.sentryEnabled.Store(sentryEnabled)
+	s.SetupRoutes()
+
+	for _, route := range s.router.Routes() {
+		pages, ok := route.SubRoutes.(chi.Router)
+		if ok && route.Pattern == "/pages/*" {
+			pages.Get("/probe", probe)
+		}
+	}
+
+	return s.router
+}

internal/server/routes.go

@@ -16,8 +16,8 @@ import (
 // submission while preventing abuse from oversized payloads.
 //
 // Every route group below installs MaxBodySize(maxFormBodySize) as
-// its FIRST middleware, ahead of both CSRF and RequireAuth. Both
-// orderings are deliberate.
+// its first middleware after the recoverer, ahead of both CSRF and
+// RequireAuth. Both orderings are deliberate.
 //
 // Ahead of CSRF because gorilla/csrf parses the form. The cap has to
 // be installed before anything reads the body, or the parse runs
@@ -46,6 +46,14 @@ const requestTimeout = 60 * time.Second
 // server's router.
 func (s *Server) SetupRoutes() {
 	s.router = chi.NewRouter()
+
+	// An unknown path gets the error page. Registered before the
+	// global middleware, because chi wraps a not-found handler in the
+	// middleware already on its router, which would then run twice.
+	// The route groups below wrap it in their own middleware the same
+	// way; running theirs twice is harmless.
+	s.router.NotFound(s.h.HandleErrorPage(http.StatusNotFound))
+
 	s.setupGlobalMiddleware()
 	s.setupRoutes()
 }
@@ -69,23 +77,33 @@ func (s *Server) setupGlobalMiddleware() {
 	// Panic recovery, deliberately here rather than first. It has to
 	// run inside every middleware that observes the response, so the
 	// 500 it writes is the status the access log records and the
-	// metrics count, and outside the sentryhttp handler below, whose
+	// metrics count, and outside the sentryhttp handler, whose
 	// Repanic option needs something further out to catch what it
 	// re-raises. chi's own middleware.Recoverer held the first slot
 	// until it was measured: on a current Go release it crashes
 	// inside its stack pretty-printer instead of recovering, so the
 	// connection dropped and the original panic was never reported.
 	// See https://git.eeqj.de/sneak/webhooker/issues/187.
-	s.router.Use(s.mw.Recoverer())
+	s.recoverPanics(s.router, nil)
+}
+
+// recoverPanics installs on r the recoverer, answering a panic with
+// page (a plain 500 when page is nil), and inside it the Sentry error
+// reporting (if SENTRY_DSN is set). Repanic is true so panics still
+// bubble up to the recoverer.
+//
+// Each admin page route group installs its own, with the error page,
+// as its first middleware. A panic there is logged, reported and
+// answered inside the group and never reaches the global recoverer,
+// which keeps the plain 500 for every other route.
+func (s *Server) recoverPanics(r chi.Router, page http.Handler) {
+	r.Use(s.mw.Recoverer(page))
 
-	// Sentry error reporting (if SENTRY_DSN is set). Repanic is
-	// true so panics still bubble up to the Recoverer middleware
-	// registered immediately above.
 	if s.sentryEnabled.Load() {
 		sentryHandler := sentryhttp.New(sentryhttp.Options{
 			Repanic: true,
 		})
-		s.router.Use(sentryHandler.Handle)
+		r.Use(sentryHandler.Handle)
 	}
 }
 
@@ -147,18 +165,22 @@ func (s *Server) setupRoutes() {
 
 func (s *Server) setupPageRoutes() {
 	s.router.Route("/pages", func(r chi.Router) {
+		s.recoverPanics(
+			r, s.h.HandleErrorPage(http.StatusInternalServerError),
+		)
 		// MaxBodySize precedes CSRF and RequireAuth deliberately;
 		// see maxFormBodySize for why, and for what it costs.
 		r.Use(s.mw.MaxBodySize(maxFormBodySize))
-		r.Use(s.mw.CSRF())
+		r.Use(s.mw.CSRF(s.h.HandleErrorPage(http.StatusForbidden)))
 		r.Use(s.mw.NoCache())
 
 		// The login POST carries no pre-emptive rate limiter. Behind
-		// the reverse proxy production requires, with TRUSTED_PROXIES
-		// unset, every client shares one bucket, so a limiter spent
-		// on arrival lets any stranger deny the operator the only
-		// administrative path. The handler verifies credentials first
-		// and charges only failures; see Handlers.authenticateUser.
+		// the reverse proxy production requires, when TRUSTED_PROXIES
+		// does not cover it, every client shares one bucket, so a
+		// limiter spent on arrival lets any stranger deny the operator
+		// the only administrative path. The handler verifies
+		// credentials first and charges only failures; see
+		// Handlers.authenticateUser.
 		r.Get("/login", s.h.HandleLoginPage())
 		r.Post("/login", s.h.HandleLoginSubmit())
 
@@ -168,10 +190,13 @@ func (s *Server) setupPageRoutes() {
 
 func (s *Server) setupUserRoutes() {
 	s.router.Route("/user/{username}", func(r chi.Router) {
+		s.recoverPanics(
+			r, s.h.HandleErrorPage(http.StatusInternalServerError),
+		)
 		// MaxBodySize precedes CSRF and RequireAuth deliberately;
 		// see maxFormBodySize for why, and for what it costs.
 		r.Use(s.mw.MaxBodySize(maxFormBodySize))
-		r.Use(s.mw.CSRF())
+		r.Use(s.mw.CSRF(s.h.HandleErrorPage(http.StatusForbidden)))
 		r.Use(s.mw.NoCache())
 		r.Use(s.mw.RequireAuth())
 		r.Get("/", s.h.HandleProfile())
@@ -182,11 +207,14 @@ func (s *Server) setupUserRoutes() {
 }
 
 func (s *Server) setupSourceRoutes() {
-	s.router.Route("/hooks", func(r chi.Router) {
+	s.router.Route("/sources", func(r chi.Router) {
+		s.recoverPanics(
+			r, s.h.HandleErrorPage(http.StatusInternalServerError),
+		)
 		// MaxBodySize precedes CSRF and RequireAuth deliberately;
 		// see maxFormBodySize for why, and for what it costs.
 		r.Use(s.mw.MaxBodySize(maxFormBodySize))
-		r.Use(s.mw.CSRF())
+		r.Use(s.mw.CSRF(s.h.HandleErrorPage(http.StatusForbidden)))
 		r.Use(s.mw.NoCache())
 		r.Use(s.mw.RequireAuth())
 		r.Get("/", s.h.HandleSourceList())
@@ -194,25 +222,28 @@ func (s *Server) setupSourceRoutes() {
 		r.Post("/new", s.h.HandleSourceCreateSubmit())
 	})
 
-	s.router.Route("/hook/{sourceID}", func(r chi.Router) {
+	s.router.Route("/source/{sourceID}", func(r chi.Router) {
+		s.recoverPanics(
+			r, s.h.HandleErrorPage(http.StatusInternalServerError),
+		)
 		// MaxBodySize precedes CSRF and RequireAuth deliberately;
 		// see maxFormBodySize for why, and for what it costs.
 		r.Use(s.mw.MaxBodySize(maxFormBodySize))
-		r.Use(s.mw.CSRF())
+		r.Use(s.mw.CSRF(s.h.HandleErrorPage(http.StatusForbidden)))
 		r.Use(s.mw.NoCache())
 		r.Use(s.mw.RequireAuth())
 		r.Get("/", s.h.HandleSourceDetail())
 		r.Get("/edit", s.h.HandleSourceEdit())
 		r.Post("/edit", s.h.HandleSourceEditSubmit())
 		r.Post("/delete", s.h.HandleSourceDelete())
-		r.Get("/events", s.h.HandleSourceLogs())
+		r.Get("/logs", s.h.HandleSourceLogs())
 		// The log page renders each body only up to its cap, so
 		// this is the only route that serves a whole one. It
 		// belongs to this group for its RequireAuth and
 		// NoCache; see HandleEventBodyDownload for the headers
 		// that keep the bytes it returns inert.
 		r.Get(
-			"/events/{eventID}/body",
+			"/logs/{eventID}/body",
 			s.h.HandleEventBodyDownload(),
 		)
 		// Replay is the one page action that queues outbound work:
@@ -279,7 +310,7 @@ func (s *Server) setupSourceRoutes() {
 
 func (s *Server) setupWebhookRoutes() {
 	s.router.With(s.mw.ReceiverRateLimit()).HandleFunc(
-		"/h/{uuid}",
+		"/webhook/{uuid}",
 		s.h.HandleWebhook(),
 	)
 }

internal/server/routes_test.go

@@ -674,7 +674,7 @@ func TestPagesLogin_CookiesFromAnEarlierDatabase(t *testing.T) {
 
 	require.NotNil(t, fresh, "login must set a session cookie")
 	assert.Equal(
-		t, "/hooks",
+		t, "/sources",
 		env.get("/", []*http.Cookie{fresh}).Header().Get("Location"),
 		"the new session cookie must authenticate",
 	)
@@ -741,7 +741,7 @@ func TestPasswordChange_UnderLimit_Succeeds(t *testing.T) {
 	)
 }
 
-// --- /hook/{sourceID} group ---
+// --- /source/{sourceID} group ---
 
 // TestSourceLogs_TruncationLinkDownloadsTheBody walks the whole
 // feature the way a user does: render the event log page through
@@ -769,11 +769,11 @@ func TestSourceLogs_TruncationLinkDownloadsTheBody(t *testing.T) {
 	wh := env.seedWebhook(t, userID)
 	env.seedEvent(t, wh.ID, stored)
 
-	page := env.get("/hook/"+wh.ID+"/events", cookies)
+	page := env.get("/source/"+wh.ID+"/logs", cookies)
 	require.Equal(t, http.StatusOK, page.Code)
 
 	link := regexp.MustCompile(
-		`href="(/hook/[^"]+/body)"`,
+		`href="(/source/[^"]+/body)"`,
 	).FindStringSubmatch(page.Body.String())
 	require.Len(
 		t, link, 2,
@@ -819,7 +819,7 @@ func TestSourceLogsBody_OtherUser404s(t *testing.T) {
 	const payload = "OWNERS-PAYLOAD-77c1"
 
 	evt := env.seedEvent(t, wh.ID, payload)
-	path := "/hook/" + wh.ID + "/events/" + evt.ID + "/body"
+	path := "/source/" + wh.ID + "/logs/" + evt.ID + "/body"
 
 	intruderID, _ := env.seedUser(t, "intruder", "somepassword")
 	intruder := env.authCookies(t, intruderID, "intruder")
@@ -853,7 +853,7 @@ func TestDeliveryReplay_PostOnlyAndCSRFProtected(t *testing.T) {
 	evt := env.seedEvent(t, wh.ID, `{"replay":"me"}`)
 	dlv := env.seedFailedDelivery(t, wh.ID, evt.ID, tgt.ID)
 
-	path := "/hook/" + wh.ID + "/deliveries/" + dlv.ID +
+	path := "/source/" + wh.ID + "/deliveries/" + dlv.ID +
 		"/replay"
 
 	assert.Equal(
@@ -879,7 +879,7 @@ func TestDeliveryReplay_PostOnlyAndCSRFProtected(t *testing.T) {
 	// The token and the action URL both come out of the rendered
 	// page, so a typo in either the route pattern or the template
 	// fails here.
-	logsPath := "/hook/" + wh.ID + "/events"
+	logsPath := "/source/" + wh.ID + "/logs"
 
 	token, cookies := env.csrfFrom(t, logsPath, cookies)
 
@@ -887,7 +887,7 @@ func TestDeliveryReplay_PostOnlyAndCSRFProtected(t *testing.T) {
 	require.Equal(t, http.StatusOK, page.Code)
 
 	action := regexp.MustCompile(
-		`action="(/hook/[^"]+/replay)"`,
+		`action="(/source/[^"]+/replay)"`,
 	).FindStringSubmatch(page.Body.String())
 	require.Len(
 		t, action, 2,
@@ -912,59 +912,6 @@ func TestDeliveryReplay_PostOnlyAndCSRFProtected(t *testing.T) {
 	)
 }
 
-// --- /h/{uuid} receiver ---
-
-// TestReceiver_EntrypointURLIsRateLimited takes the entrypoint URL
-// the webhook page shows and posts to it through the production
-// router until the receiver rate limit refuses it. The URL has to
-// reach the receiver, and the limit has to apply to it.
-func TestReceiver_EntrypointURLIsRateLimited(t *testing.T) {
-	t.Parallel()
-
-	const limit = 2
-
-	env := newTestEnvWithConfig(t, &config.Config{
-		DataDir:           t.TempDir(),
-		Environment:       config.EnvironmentDev,
-		ReceiverRateLimit: limit,
-	})
-
-	userID, _ := env.seedUser(t, "receiver", "somepassword")
-	cookies := env.authCookies(t, userID, "receiver")
-
-	wh := env.seedWebhook(t, userID)
-	require.NoError(t, env.db.DB().Omit(clause.Associations).Create(
-		&database.Entrypoint{
-			WebhookID: wh.ID,
-			Path:      "6f1e2a9c-4b7d-4e3a-9c2f-1d8b5a7e3c60",
-			Active:    true,
-		},
-	).Error)
-
-	page := env.get("/hook/"+wh.ID, cookies)
-	require.Equal(t, http.StatusOK, page.Code)
-
-	shown := regexp.MustCompile(`(/h/[^<]+)</code>`).
-		FindStringSubmatch(page.Body.String())
-	require.Len(
-		t, shown, 2, "the webhook page should show the entrypoint URL",
-	)
-
-	for i := range limit {
-		assert.Equal(
-			t, http.StatusOK,
-			env.post(shown[1], url.Values{}, nil).Code,
-			"request %d should reach the receiver", i,
-		)
-	}
-
-	assert.Equal(
-		t, http.StatusTooManyRequests,
-		env.post(shown[1], url.Values{}, nil).Code,
-		"the receiver rate limit must apply to the entrypoint URL",
-	)
-}
-
 // metricsConfig is a Config differing from the routing default only
 // in the two /metrics credentials.
 func metricsConfig(

internal/server/sentry.go

@@ -55,7 +55,7 @@ func sentryClientOptions(dsn, release string) sentry.ClientOptions {
 //
 // URL is the third such field. NewRequest builds it as
 // scheme://host/path (interfaces.go:183), and on the receiver route
-// that path is /h/<uuid> in full — a write capability, not an
+// that path is /webhook/<uuid> in full — a write capability, not an
 // identifier. It is rebuilt here from the chi route pattern, on every
 // route, keeping the scheme and the host.
 //

internal/server/sentry_test.go

@@ -153,7 +153,7 @@ func (c sentryCase) router() http.Handler {
 		sentryhttp.New(sentryhttp.Options{Repanic: true}).Handle,
 	)
 	router.HandleFunc("/pages/login", handler)
-	router.HandleFunc("/h/{uuid}", handler)
+	router.HandleFunc("/webhook/{uuid}", handler)
 
 	return router
 }
@@ -191,7 +191,7 @@ func sentryLoginRequest(client *sentry.Client) *http.Request {
 // concrete path carries the entrypoint capability.
 func sentryReceiverRequest(client *sentry.Client) *http.Request {
 	return sentryRequest(
-		client, "/h/"+sentryReceiverUUID, "payload=hello",
+		client, "/webhook/"+sentryReceiverUUID, "payload=hello",
 	)
 }
 
@@ -316,7 +316,7 @@ func TestSentryScrub_ReplacesTheCapabilityPathWithTheRoutePattern(
 		t, marshalEvent(t, event), sentryReceiverUUID,
 	)
 	assert.Equal(
-		t, "http://example.com/h/{uuid}", event.Request.URL,
+		t, "http://example.com/webhook/{uuid}", event.Request.URL,
 	)
 }
 
@@ -401,7 +401,7 @@ func TestSentryScrub_TransactionDispatchIsUnscrubbedWithoutTheHook(
 func TestSentryScrub_FallsBackWithoutARoutePattern(t *testing.T) {
 	t.Parallel()
 
-	concrete := "https://example.com/h/" + sentryReceiverUUID
+	concrete := "https://example.com/webhook/" + sentryReceiverUUID
 
 	// A request with no chi routing context on it at all, which is
 	// what an event captured outside the router would carry.
@@ -426,7 +426,7 @@ func TestSentryScrub_FallsBackWithoutARoutePattern(t *testing.T) {
 
 			event := sentry.NewEvent()
 			event.Request = &sentry.Request{URL: concrete}
-			event.Transaction = "POST /h/" +
+			event.Transaction = "POST /webhook/" +
 				sentryReceiverUUID
 
 			scrubbed := server.ScrubSentryRequestForTest(
@@ -459,9 +459,9 @@ func TestSentryScrub_WithholdsUnparseableValues(t *testing.T) {
 
 	event := sentry.NewEvent()
 	event.Request = &sentry.Request{
-		URL: "/h/" + sentryReceiverUUID,
+		URL: "/webhook/" + sentryReceiverUUID,
 	}
-	event.Transaction = "/h/" + sentryReceiverUUID
+	event.Transaction = "/webhook/" + sentryReceiverUUID
 
 	scrubbed := server.ScrubSentryRequestForTest(event, nil)
 	require.NotNil(t, scrubbed)

templates/error.html

@@ -0,0 +1,15 @@
+{{template "base" .}}
+
+{{define "title"}}{{.StatusText}} - Webhooker{{end}}
+
+{{define "content"}}
+<div class="max-w-4xl mx-auto px-6 py-12">
+    <h1 class="text-2xl font-medium text-gray-900 mb-4">{{.Status}} {{.StatusText}}</h1>
+    <p class="text-gray-600 mb-6">{{.Message}}</p>
+    {{if .User}}
+    <a href="/sources" class="btn-secondary">Back to webhooks</a>
+    {{else}}
+    <a href="/pages/login" class="btn-primary">Sign in</a>
+    {{end}}
+</div>
+{{end}}

templates/navbar.html

@@ -16,7 +16,7 @@
         <!-- Desktop navigation -->
         <div class="hidden md:flex items-center gap-4">
             {{if .User}}
-            <a href="/hooks" class="btn-text">Webhooks</a>
+            <a href="/sources" class="btn-text">Webhooks</a>
             <a href="/user/{{.User.Username}}" class="btn-text">
                 <svg class="w-5 h-5 mr-1" fill="currentColor" viewBox="0 0 16 16">
                     <path d="M11 6a3 3 0 1 1-6 0 3 3 0 0 1 6 0z"/>
@@ -24,10 +24,14 @@
                 </svg>
                 {{.User.Username}}
             </a>
+            {{/* An error page can be served before a form token is issued,
+                 and a logout without one is refused. */}}
+            {{if .CSRFToken}}
             <form method="POST" action="/pages/logout" class="inline">
                 <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                 <button type="submit" class="btn-text">Logout</button>
             </form>
+            {{end}}
             {{else}}
             <a href="/pages/login" class="btn-primary">Login</a>
             {{end}}
@@ -38,12 +42,14 @@
     <div x-show="open" x-cloak x-transition class="md:hidden mt-4 pt-4 border-t border-gray-200">
         <div class="flex flex-col gap-2">
             {{if .User}}
-            <a href="/hooks" class="btn-text w-full text-left">Webhooks</a>
+            <a href="/sources" class="btn-text w-full text-left">Webhooks</a>
             <a href="/user/{{.User.Username}}" class="btn-text w-full text-left">Profile</a>
+            {{if .CSRFToken}}
             <form method="POST" action="/pages/logout">
                 <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                 <button type="submit" class="btn-text w-full text-left">Logout</button>
             </form>
+            {{end}}
             {{else}}
             <a href="/pages/login" class="btn-primary w-full">Login</a>
             {{end}}

templates/source_detail.html

@@ -5,7 +5,7 @@
 {{define "content"}}
 <div class="max-w-6xl mx-auto px-6 py-8" x-data="{ showAddEntrypoint: false, showAddTarget: false }">
     <div class="mb-6">
-        <a href="/hooks" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to webhooks</a>
+        <a href="/sources" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to webhooks</a>
         <div class="flex justify-between items-center mt-2">
             <div>
                 <h1 class="text-2xl font-medium text-gray-900">{{.Webhook.Name}}</h1>
@@ -14,9 +14,9 @@
                 {{end}}
             </div>
             <div class="flex gap-2">
-                <a href="/hook/{{.Webhook.ID}}/events" class="btn-secondary">Full Event Log</a>
-                <a href="/hook/{{.Webhook.ID}}/edit" class="btn-secondary">Edit</a>
-                <form method="POST" action="/hook/{{.Webhook.ID}}/delete" onsubmit="return confirm('Delete this webhook and all its data?')">
+                <a href="/source/{{.Webhook.ID}}/logs" class="btn-secondary">Event Log</a>
+                <a href="/source/{{.Webhook.ID}}/edit" class="btn-secondary">Edit</a>
+                <form method="POST" action="/source/{{.Webhook.ID}}/delete" onsubmit="return confirm('Delete this webhook and all its data?')">
                     <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                     <button type="submit" class="btn-danger">Delete</button>
                 </form>
@@ -39,7 +39,7 @@
 
             <!-- Add entrypoint form -->
             <div x-show="showAddEntrypoint" x-cloak class="p-4 bg-gray-50 border-b border-gray-200">
-                <form method="POST" action="/hook/{{.Webhook.ID}}/entrypoints" class="flex gap-2">
+                <form method="POST" action="/source/{{.Webhook.ID}}/entrypoints" class="flex gap-2">
                     <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                     <input type="text" name="description" placeholder="Description (optional)" class="input text-sm flex-1">
                     <button type="submit" class="btn-primary text-sm">Add</button>
@@ -57,20 +57,20 @@
                             {{else}}
                             <span class="badge-error">Inactive</span>
                             {{end}}
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/entrypoints/{{.ID}}/toggle" class="inline">
+                            <form method="POST" action="/source/{{$.Webhook.ID}}/entrypoints/{{.ID}}/toggle" class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="text-xs text-gray-500 hover:text-primary-600" title="{{if .Active}}Deactivate{{else}}Activate{{end}}">
                                     {{if .Active}}Deactivate{{else}}Activate{{end}}
                                 </button>
                             </form>
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/entrypoints/{{.ID}}/delete" onsubmit="return confirm('Delete this entrypoint?')" class="inline">
+                            <form method="POST" action="/source/{{$.Webhook.ID}}/entrypoints/{{.ID}}/delete" onsubmit="return confirm('Delete this entrypoint?')" class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="text-xs text-red-500 hover:text-red-700" title="Delete">Delete</button>
                             </form>
                         </div>
                     </div>
                     <div class="flex items-start gap-2 mt-1">
-                        <code id="entrypoint-url-{{.ID}}" class="text-xs text-gray-500 break-all block flex-1">{{$.BaseURL}}/h/{{.Path}}</code>
+                        <code id="entrypoint-url-{{.ID}}" class="text-xs text-gray-500 break-all block flex-1">{{$.BaseURL}}/webhook/{{.Path}}</code>
                         <!-- Hidden until app.js reveals it; without the
                              script the URL above stays selectable. -->
                         <button type="button" hidden data-copy-target="entrypoint-url-{{.ID}}" class="text-xs text-gray-500 hover:text-primary-600">Copy</button>
@@ -98,7 +98,7 @@
 
             <!-- Add target form -->
             <div x-show="showAddTarget" x-cloak class="p-4 bg-gray-50 border-b border-gray-200">
-                <form method="POST" action="/hook/{{.Webhook.ID}}/targets" x-data="{ targetType: 'http' }" class="space-y-3">
+                <form method="POST" action="/source/{{.Webhook.ID}}/targets" x-data="{ targetType: 'http' }" class="space-y-3">
                     <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                     <div class="flex gap-2">
                         <input type="text" name="name" placeholder="Target name" required class="input text-sm flex-1">
@@ -151,14 +151,14 @@
                             {{else}}
                             <span class="badge-error">Inactive</span>
                             {{end}}
-                            <a href="/hook/{{$.Webhook.ID}}/targets/{{.ID}}/edit" class="text-xs text-gray-500 hover:text-primary-600" title="Edit">Edit</a>
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/targets/{{.ID}}/toggle" class="inline">
+                            <a href="/source/{{$.Webhook.ID}}/targets/{{.ID}}/edit" class="text-xs text-gray-500 hover:text-primary-600" title="Edit">Edit</a>
+                            <form method="POST" action="/source/{{$.Webhook.ID}}/targets/{{.ID}}/toggle" class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="text-xs text-gray-500 hover:text-primary-600" title="{{if .Active}}Deactivate{{else}}Activate{{end}}">
                                     {{if .Active}}Deactivate{{else}}Activate{{end}}
                                 </button>
                             </form>
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/targets/{{.ID}}/delete" onsubmit="return confirm('Delete this target?')" class="inline">
+                            <form method="POST" action="/source/{{$.Webhook.ID}}/targets/{{.ID}}/delete" onsubmit="return confirm('Delete this target?')" class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="text-xs text-red-500 hover:text-red-700" title="Delete">Delete</button>
                             </form>
@@ -182,7 +182,7 @@
     <div class="card mt-6">
         <div class="p-4 border-b border-gray-200 flex justify-between items-center">
             <h2 class="text-lg font-medium text-gray-900">50 Most Recent Events</h2>
-            <a href="/hook/{{.Webhook.ID}}/events" class="btn-text text-sm">Full Event Log</a>
+            <a href="/source/{{.Webhook.ID}}/logs" class="btn-text text-sm">View All</a>
         </div>
         <div class="divide-y divide-gray-100">
             {{range .Events}}

templates/source_edit.html

@@ -5,7 +5,7 @@
 {{define "content"}}
 <div class="max-w-2xl mx-auto px-6 py-8">
     <div class="mb-6">
-        <a href="/hook/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
+        <a href="/source/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
         <h1 class="text-2xl font-medium text-gray-900 mt-2">Edit Webhook</h1>
     </div>
 
@@ -14,7 +14,7 @@
         <div class="alert-error">{{.Error}}</div>
         {{end}}
 
-        <form method="POST" action="/hook/{{.Webhook.ID}}/edit" class="space-y-6">
+        <form method="POST" action="/source/{{.Webhook.ID}}/edit" class="space-y-6">
             <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
             <div class="form-group">
                 <label for="name" class="label">Name</label>
@@ -34,7 +34,7 @@
 
             <div class="flex gap-3">
                 <button type="submit" class="btn-primary">Save Changes</button>
-                <a href="/hook/{{.Webhook.ID}}" class="btn-secondary">Cancel</a>
+                <a href="/source/{{.Webhook.ID}}" class="btn-secondary">Cancel</a>
             </div>
         </form>
     </div>

templates/source_logs.html

@@ -1,13 +1,13 @@
 {{template "base" .}}
 
-{{define "title"}}Full Event Log - {{.Webhook.Name}} - Webhooker{{end}}
+{{define "title"}}Event Log - {{.Webhook.Name}} - Webhooker{{end}}
 
 {{define "content"}}
 <div class="max-w-6xl mx-auto px-6 py-8">
     <div class="mb-6">
-        <a href="/hook/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
+        <a href="/source/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
         <div class="flex justify-between items-center mt-2">
-            <h1 class="text-2xl font-medium text-gray-900">Full Event Log</h1>
+            <h1 class="text-2xl font-medium text-gray-900">Event Log</h1>
             <span class="text-sm text-gray-500">{{.TotalEvents}} total event{{if ne .TotalEvents 1}}s{{end}}</span>
         </div>
     </div>
@@ -55,7 +55,7 @@
                             {{if .ResubmittedFrom}}Resubmitted from event <span class="font-mono">{{.ResubmittedFromID}}</span>.{{end}}
                             {{if .ResubmitCount}}Resubmitted as {{.ResubmitCount}} new event{{if ne .ResubmitCount 1}}s{{end}}.{{end}}
                         </div>
-                        <form method="POST" action="/hook/{{$.Webhook.ID}}/events/{{.ID}}/resubmit" class="inline">
+                        <form method="POST" action="/source/{{$.Webhook.ID}}/events/{{.ID}}/resubmit" class="inline">
                             <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                             <input type="hidden" name="page" value="{{$.Page}}">
                             <button type="submit" class="text-xs text-primary-600 hover:text-primary-700" title="Submit this event again as a new event, to every currently active target">Resubmit</button>
@@ -63,7 +63,7 @@
                     </div>
                     <pre class="text-xs text-gray-700 overflow-x-auto whitespace-pre-wrap break-all">{{.Body}}</pre>
                     {{if .BodyTruncated}}
-                    <p class="mt-2 text-xs text-gray-500">Body truncated for display: showing {{.BodyShownBytes}} of {{.BodyBytes}} bytes. The stored body is unchanged &mdash; <a href="/hook/{{$.Webhook.ID}}/events/{{.ID}}/body" class="text-primary-600 hover:text-primary-700 underline">download the full body</a>.</p>
+                    <p class="mt-2 text-xs text-gray-500">Body truncated for display: showing {{.BodyShownBytes}} of {{.BodyBytes}} bytes. The stored body is unchanged &mdash; <a href="/source/{{$.Webhook.ID}}/logs/{{.ID}}/body" class="text-primary-600 hover:text-primary-700 underline">download the full body</a>.</p>
                     {{end}}
 
                     {{if .Deliveries}}
@@ -79,7 +79,7 @@
                                     </div>
                                     <div class="flex items-center gap-3">
                                         {{if .Status.Terminal}}
-                                        <form method="POST" action="/hook/{{$.Webhook.ID}}/deliveries/{{.ID}}/replay" class="inline" @click.stop>
+                                        <form method="POST" action="/source/{{$.Webhook.ID}}/deliveries/{{.ID}}/replay" class="inline" @click.stop>
                                             <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                             <input type="hidden" name="page" value="{{$.Page}}">
                                             <button type="submit" class="text-xs text-primary-600 hover:text-primary-700" title="Send this event to the target again">Replay</button>
@@ -139,11 +139,11 @@
     {{if or .HasPrev .HasNext}}
     <div class="flex justify-center gap-2 mt-6">
         {{if .HasPrev}}
-        <a href="/hook/{{.Webhook.ID}}/events?page={{.PrevPage}}" class="btn-secondary text-sm">&larr; Previous</a>
+        <a href="/source/{{.Webhook.ID}}/logs?page={{.PrevPage}}" class="btn-secondary text-sm">&larr; Previous</a>
         {{end}}
         <span class="inline-flex items-center px-4 py-2 text-sm text-gray-500">Page {{.Page}} of {{.TotalPages}}</span>
         {{if .HasNext}}
-        <a href="/hook/{{.Webhook.ID}}/events?page={{.NextPage}}" class="btn-secondary text-sm">Next &rarr;</a>
+        <a href="/source/{{.Webhook.ID}}/logs?page={{.NextPage}}" class="btn-secondary text-sm">Next &rarr;</a>
         {{end}}
     </div>
     {{end}}

templates/sources_list.html

@@ -6,7 +6,7 @@
 <div class="max-w-6xl mx-auto px-6 py-8">
     <div class="flex justify-between items-center mb-6">
         <h1 class="text-2xl font-medium text-gray-900">Webhooks</h1>
-        <a href="/hooks/new" class="btn-primary">
+        <a href="/sources/new" class="btn-primary">
             <svg class="w-5 h-5 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/>
             </svg>
@@ -17,7 +17,7 @@
     {{if .Webhooks}}
     <div class="grid gap-4">
         {{range .Webhooks}}
-        <a href="/hook/{{.ID}}" class="card-elevated p-6 block">
+        <a href="/source/{{.ID}}" class="card-elevated p-6 block">
             <div class="flex justify-between items-start">
                 <div>
                     <h2 class="text-lg font-medium text-gray-900">{{.Name}}</h2>
@@ -42,7 +42,7 @@
         </svg>
         <h2 class="text-lg font-medium text-gray-900 mb-2">No webhooks yet</h2>
         <p class="text-gray-500 mb-6">Create your first webhook to start receiving and forwarding events.</p>
-        <a href="/hooks/new" class="btn-primary">Create Webhook</a>
+        <a href="/sources/new" class="btn-primary">Create Webhook</a>
     </div>
     {{end}}
 </div>

templates/sources_new.html

@@ -5,7 +5,7 @@
 {{define "content"}}
 <div class="max-w-2xl mx-auto px-6 py-8">
     <div class="mb-6">
-        <a href="/hooks" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to webhooks</a>
+        <a href="/sources" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to webhooks</a>
         <h1 class="text-2xl font-medium text-gray-900 mt-2">Create Webhook</h1>
     </div>
 
@@ -14,7 +14,7 @@
         <div class="alert-error">{{.Error}}</div>
         {{end}}
 
-        <form method="POST" action="/hooks/new" class="space-y-6">
+        <form method="POST" action="/sources/new" class="space-y-6">
             <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
             <div class="form-group">
                 <label for="name" class="label">Name</label>
@@ -34,7 +34,7 @@
 
             <div class="flex gap-3">
                 <button type="submit" class="btn-primary">Create Webhook</button>
-                <a href="/hooks" class="btn-secondary">Cancel</a>
+                <a href="/sources" class="btn-secondary">Cancel</a>
             </div>
         </form>
     </div>

templates/target_edit.html

@@ -5,7 +5,7 @@
 {{define "content"}}
 <div class="max-w-2xl mx-auto px-6 py-8">
     <div class="mb-6">
-        <a href="/hook/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
+        <a href="/source/{{.Webhook.ID}}" class="text-sm text-primary-600 hover:text-primary-700">&larr; Back to {{.Webhook.Name}}</a>
         <h1 class="text-2xl font-medium text-gray-900 mt-2">Edit Target</h1>
         <p class="text-sm text-gray-500 mt-1">Type: {{.Target.Type}}. A target's type cannot be changed; create a new target to deliver a different way.</p>
     </div>
@@ -21,7 +21,7 @@
         </div>
         {{end}}
 
-        <form method="POST" action="/hook/{{.Webhook.ID}}/targets/{{.Target.ID}}/edit" class="space-y-6">
+        <form method="POST" action="/source/{{.Webhook.ID}}/targets/{{.Target.ID}}/edit" class="space-y-6">
             <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
 
             <div class="form-group">
@@ -75,7 +75,7 @@
 
             <div class="flex gap-3">
                 <button type="submit" class="btn-primary">Save Changes</button>
-                <a href="/hook/{{.Webhook.ID}}" class="btn-secondary">Cancel</a>
+                <a href="/source/{{.Webhook.ID}}" class="btn-secondary">Cancel</a>
             </div>
         </form>
     </div>