Say the query logger drops bound values (closes #535)

The comment on MaxAccessLogLineBytes said the GORM adapter logs each
statement with the client's parameter written into it. Its
ParamsFilter drops every bound value, so the statement is logged with
its placeholders. The comment now says so and keeps the parts that
still hold: the widest line spends two budgets and the adapter's test
checks it against this constant.

The assertBounded doc no longer claims each line was cut, and the
postReceiver doc no longer explains itself by a log size test that is
gone.

Model: opus-5-5

Dockerfile

@@ -76,8 +76,6 @@ RUN --network=none node_modules/.bin/prettier --check '**/*.md'
 # depends on it.
 #
 # golangci/golangci-lint:v2.14.0 (Debian-based), 2026-09-24
-# Using Debian-based image because mattn/go-sqlite3 (CGO) does not
-# compile on Alpine musl (off64_t is a glibc type).
 FROM golangci/golangci-lint:v2.14.0@sha256:ad862ba6b3798cbe0fd9fd7408d498fd74fbd2623a92406b2fd3898faf0bf98f AS lint
 
 WORKDIR /src
@@ -167,9 +165,7 @@ RUN --mount=type=tmpfs,target=/tmp/tests,size=512m \
 
 # Build stage
 # golang:1.26.1-bookworm (Debian-based), 2026-03-17
-# Using Debian-based image because gorm.io/driver/sqlite pulls in
+# The image ships git and make, which the version step below uses.
-# mattn/go-sqlite3 (CGO), which does not compile on Alpine musl. The image
-# ships git and make, which the version step below uses.
 FROM golang:1.26.1-bookworm@sha256:4465644228bc2857a954b092167e12aa59c006a3492282a6c820bf4755fd64a4 AS builder
 
 # Nothing is wanted from the lint and test phases or from the stylesheet and
@@ -211,20 +207,11 @@ RUN version="$(make version VERSION="$VERSION")"; \
     fi
 
 # Builds through the Makefile's build target, which runs script/assets
-# (Alpine.js, extracted from its tarball in 3p/) first.
+# (Alpine.js, extracted from its tarball in 3p/) first. The target builds
+# with cgo off, so the binary is statically linked and runs on the Alpine
+# runtime image below as it is.
 RUN make build VERSION="$VERSION"
 
-# Rebuild with static linking for Alpine runtime.
-# make build already verified compilation.
-# The CGO binary from `make build` is dynamically linked against glibc,
-# which doesn't exist on Alpine (musl). Rebuild with static linking so
-# the binary runs on Alpine without glibc.
-#
-# The static flags go in through GO_LDFLAGS rather than a -ldflags of
-# their own: the build target composes them with the -X that stamps the
-# version, so this relink cannot silently drop the stamp.
-RUN CGO_ENABLED=1 make build VERSION="$VERSION" GO_LDFLAGS='-extldflags "-static"'
-
 # Runtime stage
 # alpine:3.21, 2026-03-17
 FROM alpine:3.21@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
@@ -268,8 +255,17 @@ EXPOSE 8080
 # port.
 ENV BIND_ADDRESS=0.0.0.0
 
+# The probe requests the container's own address, not loopback, so a
+# listener that answers only on loopback (an empty or loopback
+# BIND_ADDRESS) fails it. On a network with IPv4, hostname -i prints the
+# container's IPv4 address, which 0.0.0.0 and :: both answer. On an
+# IPv6-only network it prints none, and the probe requests the IPv6
+# address /etc/hosts lists under the container's hostname instead, which
+# only :: answers.
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/.well-known/healthcheck || exit 1
+    CMD addr="$(hostname -i 2>/dev/null | cut -d ' ' -f 1)"; \
+        [ -n "$addr" ] || addr="[$(getent hosts "$(hostname)" | cut -d ' ' -f 1)]"; \
+        wget --no-verbose --tries=1 --spider "http://$addr:8080/.well-known/healthcheck" || exit 1
 
 ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
 CMD ["/app/webhooker"]

Makefile

@@ -16,15 +16,6 @@ VERSION ?= $(shell script/version)
 # exists to correct.
 override VERSION := $(or $(strip $(VERSION)),$(shell script/version))
 
-# Extra linker flags for the build target. The static relink in the
-# Dockerfile adds -extldflags here rather than passing its own -ldflags,
-# so composing flags cannot drop the version stamp.
-#
-# The build target itself always passes -trimpath and -s -w, as the Go
-# Dockerfile in REPO_POLICIES.md does: no build paths, symbol table or
-# debug information in the binary.
-GO_LDFLAGS ?=
-
 bootstrap:
 	@script/bootstrap
 
@@ -52,8 +43,12 @@ fmt-check:
 check:
 	@script/check
 
+# Built with cgo off, -trimpath and -s -w, as the Go Dockerfile in
+# REPO_POLICIES.md does: the binary carries no build paths, symbol table or
+# debug information, and on Linux, the image's included, it is statically
+# linked.
 build: assets
-	go build -trimpath -ldflags '$(strip -s -w -X main.version=$(VERSION) $(GO_LDFLAGS))' -o bin/webhooker ./cmd/webhooker
+	CGO_ENABLED=0 go build -trimpath -ldflags '-s -w -X main.version=$(VERSION)' -o bin/webhooker ./cmd/webhooker
 
 run: build
 	./bin/webhooker

README.md

@@ -310,16 +310,17 @@ the namespace, whatever the process bound. Exposure is decided at the publish
 flag instead — `-p 127.0.0.1:8080:8080` rather than `-p 8080:8080` — which is
 the operator's to choose and is what [Running with Docker](#running-with-docker)
 shows. A loopback bind inside a container buys nothing and makes the process
-unreachable through its own published port.
+unreachable through its own published port. A container on an IPv6-only Docker
+network has no IPv4 address for `0.0.0.0` to answer on, so there it needs
+`BIND_ADDRESS=::`.
 
 The value must be an IP address literal:
 
 - `127.0.0.1` — loopback only (the binary's default). Use this with a reverse
   proxy on the same host.
-- `0.0.0.0` — every IPv4 address. The image's default; on a bare host, only
+- `0.0.0.0` — every IPv4 address and no IPv6 address. The image's default; on a
-  behind a firewall on the port.
+  bare host, only behind a firewall on the port.
-- `::` — every address, IPv6 and (on Linux, with the default
+- `::` — every IPv6 address and every IPv4 address.
-  `net.ipv6.bindv6only=0`) IPv4 as well.
 - A specific address such as `10.0.0.5` — that interface only.
 
 An **empty** value is treated as unset, as everywhere else here, and takes the
@@ -340,7 +341,8 @@ machine that has no such interface — is a valid literal, so it reaches the
 listener and fails there. The process logs the bind error and exits non-zero
 rather than staying up with nothing listening. The effective value is in the
 `bindAddress` field of the startup log line, which is the way to check what a
-running deployment actually bound.
+running deployment actually bound. On a bare host, `ss -ltn` lists the socket
+itself as `0.0.0.0:8080` for a `0.0.0.0` bind and as `*:8080` for `::`.
 
 #### Metrics credentials
 
@@ -668,9 +670,9 @@ Either set a literal or leave the variable out entirely.
 Overriding `BIND_ADDRESS` to a loopback address in a container — by that route
 or deliberately — makes the container unreachable from outside its namespace
 even with `-p`. The published port answers nothing, and the health check fails
-too: it requests `http://localhost:8080`, `localhost` resolves to `::1` first,
+too: it requests the container's own address (its IPv4 address, or its IPv6
-and a `127.0.0.1` bind is not listening there. The container then goes
+address on an IPv6-only network), where a loopback bind is not listening. The
-`unhealthy` about **65 seconds** after start — from
+container then goes `unhealthy` about **65 seconds** after start — from
 `HEALTHCHECK --start-period=5s --interval=30s --retries=3`, so failing probes at
 5s, 35s and 65s, and `unhealthy` on the third. (Docker's probe cadence during
 the start period has changed between versions; re-derive from those three values
@@ -726,8 +728,8 @@ the credentials.
       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
+      that address; the health check's own lines show the container's own
-      [Trusted proxies](#trusted-proxies).
+      address. 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`.
     - Everything else is optional; see [Configuration](#configuration).
@@ -802,7 +804,12 @@ comes up, serves pages, and is broken in a way nothing reports.
    proxy's log names it regardless. nginx's default `combined` format already
    logs `$remote_addr`; do not replace it with one that drops the client
    address, and retain those logs as long as you would want to answer a question
-   about traffic.
+   about traffic. That log also records the full request path, so it holds the
+   entrypoint UUID of every event a sender posts. webhooker's own log does not,
+   apart from the line a `log` target writes. Protect the proxy's log as you
+   would the entrypoint URLs themselves: anyone who can read it can post events
+   to every entrypoint in it (see
+   [The entrypoint URL is the authentication secret](#the-entrypoint-url-is-the-authentication-secret)).
 
 ### nginx
 
@@ -828,7 +835,9 @@ server {
     client_max_body_size 1m;
 
     # $remote_addr is the client. webhooker's own log names it, as
-    # clientIP, only while TRUSTED_PROXIES covers this proxy.
+    # clientIP, only while TRUSTED_PROXIES covers this proxy. The
+    # request path in this log holds the entrypoint UUID, so protect
+    # the file like the entrypoint URL itself.
     access_log /var/log/nginx/webhooker.access.log combined;
 
     location / {
@@ -1160,7 +1169,16 @@ What that means for an operator:
 
 - **The URL is a capability, so treat it as a secret.** Keep it out of logs,
   ticket bodies, chat messages and screenshots. Anyone who reads it anywhere can
-  post events as that sender.
+  post events as that sender. Apart from a `log` target's line, webhooker's own
+  log lines never carry the UUID: they name a request to the receiver by the
+  route pattern `/h/{uuid}`, the `webhook request received` line names the
+  entrypoint by its `entrypoint_id`, and the access log keeps only the scheme
+  and host of a `Referer`. A `log` target writes the request's headers as
+  received, so a `Referer` naming the entrypoint URL appears in its line, as it
+  does when a sender has followed a redirect from `http://` to `https://`. The
+  reverse proxy's access log does carry the UUID, in the request path, so it
+  must be protected like the URL itself (see
+  [Deployment behind a reverse proxy](#deployment-behind-a-reverse-proxy)).
 - **Rotating means minting a new entrypoint, not changing a key.** There is no
   way to rotate the UUID in place. To retire one, delete the entrypoint (or
   deactivate it, which answers `410`) and create a new one, then point the
@@ -1235,34 +1253,37 @@ markup. The CSP build runs no expressions, so every Alpine directive in
 `static/js/app.js`: `x-data="collapsible"` and `@click="toggle"`, never
 `x-data="{ open: false }"` or `@click="open = !open"`.
 
-A browser test in `internal/server` loads the webhook page, its edit pages and
+A browser test in `internal/server` loads the sign-in page, the webhook page,
-the event log under the real policy and checks that: the add entrypoint form
+its edit pages, the event log, the webhook list, the settings page, the profile
-stays hidden until Add is clicked; for every target type, the targets section's
+page and the `404` error page shown for a path that does not exist, under the
-Add shows only a choice of type with Next and Cancel, Next shows only that
+real policy and checks that: the add entrypoint form stays hidden until Add is
-type's fields (no url field for `database` or `log`), Cancel at either step
+clicked; for every target type, the targets section's Add shows only a choice of
-closes the form, and saving adds the target; a refused target comes back with
+type with Next and Cancel, Next shows only that type's fields (no url field for
-its form open, the values entered and the reason, and after Cancel the next Add
+`database` or `log`), Cancel at either step closes the form, and saving adds the
-starts with an empty form and no reason; a refused save on the target edit page
+target; a refused target comes back with its form open, the values entered and
-and on the webhook edit page comes back with the reason and every value entered;
+the reason, and after Cancel the next Add starts with an empty form and no
-the Copy button beside an entrypoint URL reads "Copied" once clicked; an
+reason; a refused save on the target edit page and on the webhook edit page
-entrypoint's Edit button shows its edit form in place of its description and
+comes back with the reason and every value entered; the Copy button beside an
-hides until the form closes, Cancel hides the form and drops what was typed, as
+entrypoint URL reads "Copied" once clicked; an entrypoint's Edit button shows
-does leaving the page and going back to it, and Save changes the description; of
+its edit form in place of its description and hides until the form closes,
-the recent events on the webhook page only the newest starts expanded, each
+Cancel hides the form and drops what was typed, as does leaving the page and
-expands and collapses, and Open leads to the event's own page; of the events in
+going back to it, and Save changes the description; of the recent events on the
-the event log only the newest starts expanded, and an event there expands and
+webhook page only the newest starts expanded, each expands and collapses, and
-collapses when its row's caret or its ID is clicked, and from the keyboard, but
+Open leads to the event's own page; of the events in the event log only the
-not when its ID is selected with the mouse, and a delivery's attempts inside it
+newest starts expanded, and an event there expands and collapses when its row's
-expand and collapse; and at phone width the menu button opens and closes the
+caret or its ID is clicked, and from the keyboard, but not when its ID is
-mobile menu, and neither the webhook page nor the event log, with a delivery's
+selected with the mouse, and a delivery's attempts inside it expand and
-attempts open, scrolls sideways or cuts anything off at the page's or a card's
+collapse; at phone width the menu button opens and closes the mobile menu, and
-edge. It also fails if the browser reports a console warning or error, an
+neither the webhook page nor the event log, with a delivery's attempts open,
-uncaught exception, or anything the policy refused. `make check` and the image
+scrolls sideways or cuts anything off at the page's or a card's edge; and a
-build lint it but do not run it, and `make test` leaves it out (its file is
+target's Delete asks first, naming the target, sends nothing when the answer is
-built only with the `browser` build tag). Run it with `make test-browser` after
+no and deletes the target when it is yes. It also fails if the browser reports a
-changing `templates/` or `static/js/`: that builds `Dockerfile.browser`, which
+console warning or error, an uncaught exception, or anything the policy refused.
-runs the test in a digest-pinned headless browser image, so the host needs no
+`make check` and the image build lint it but do not run it, and `make test`
-browser.
+leaves it out (its file is built only with the `browser` build tag). Run it with
+`make test-browser` after changing `templates/` or `static/js/`: that builds
+`Dockerfile.browser`, which runs the test in a digest-pinned headless browser
+image, so the host needs no browser.
 
 The package's tarball is committed as `3p/alpinejs-csp-3.14.9.tgz`, byte for
 byte as the npm registry publishes it. It is a dependency, not this repo's build
@@ -1295,7 +1316,9 @@ and commit the regenerated file with the change. Tailwind takes classes only
 from the files that `input.css` names in its `@source` lines; a class written in
 any other file is not generated until that file is named there too. `make check`
 and the image build fail when the committed file differs from what `make css`
-generates. `static/css/style.css` is hand-written and is not generated.
+generates. `static/css/style.css` is hand-written and is not generated. The
+pages' Content-Security-Policy refuses inline styles, so a template styles an
+element with a class, never a `style` attribute.
 
 `make css` runs the Tailwind standalone CLI in Docker, at the version and sha256
 pinned in the Dockerfile's stylesheet stages; it is never installed on the host.
@@ -1317,20 +1340,22 @@ webhooker solves this by acting as a durable intermediary:
    nothing is lost if downstream targets are unavailable.
 
 2. **Guaranteed delivery** — Events are queued for delivery to each configured
-   target. Failed deliveries are retried with configurable backoff. Every
+   target. Failed deliveries are retried with configurable backoff. Delivery
-   delivery attempt is logged with status codes, response bodies, and timing.
+   attempts are logged with status codes, response bodies, and timing.
 
     **That guarantee is at-least-once, not exactly-once.** When a send reaches
     its target but the write recording that outcome fails, the delivery is
     deliberately left in a recoverable state rather than marked done — losing a
     delivery is the worse failure — so the pending sweep picks it up about
     fifteen minutes later, or the next restart does, and the target receives a
-    payload it already got. webhooker adds no delivery identifier of its own to
+    payload it already got. A send still in flight when the service stops is
-    an outbound request, so **make your receiver idempotent** against whatever
+    left the same way: its attempt is not recorded, and the next start sends it
-    the payload itself carries.
+    again (see Shutdown). webhooker adds no delivery identifier of its own to an
+    outbound request, so **make your receiver idempotent** against whatever the
+    payload itself carries.
 
 3. **Observability** — Full request/response logging for every webhook received
-   and every delivery attempted. Prometheus metrics expose volume, latency, and
+   and for delivery attempts. Prometheus metrics expose volume, latency, and
    error rates. The web UI provides real-time visibility into event flow.
 
 4. **Fan-out** — A single incoming webhook can be delivered to multiple targets
@@ -1368,10 +1393,10 @@ It uses:
   management
 - **[go-chi](https://github.com/go-chi/chi)** for HTTP routing
 - **[GORM](https://gorm.io)** for database access with
-  **[modernc.org/sqlite](https://pkg.go.dev/modernc.org/sqlite)** as the runtime
+  **[modernc.org/sqlite](https://pkg.go.dev/modernc.org/sqlite)**, which is pure
-  SQLite driver. Note: `gorm.io/driver/sqlite` transitively depends on
+  Go, as the SQLite driver. `gorm.io/driver/sqlite` also imports
-  `mattn/go-sqlite3`, which requires CGO at build time (see [Docker](#docker)
+  `mattn/go-sqlite3`, whose stub for builds without cgo is linked into the
-  section)
+  binary but never used
 - **[slog](https://pkg.go.dev/log/slog)** (stdlib) for structured logging with
   TTY detection (text for dev, JSON for prod)
 - **[gorilla/sessions](https://github.com/gorilla/sessions)** for encrypted
@@ -1768,7 +1793,7 @@ is what bounds it.
 #### DeliveryResult
 
 The result of a single delivery attempt. Every attempt (including retries) is
-individually logged for full observability.
+individually logged, except one cut off by a stop (see Shutdown).
 
 | Field           | Type    | Description                               |
 | --------------- | ------- | ----------------------------------------- |
@@ -2110,9 +2135,7 @@ endpoint. That is the JSON key; the error text for a missing one reads
 `webhook_url is required`, which is the message, not the key.
 
 The database uses the
-[modernc.org/sqlite](https://pkg.go.dev/modernc.org/sqlite) driver at runtime,
+[modernc.org/sqlite](https://pkg.go.dev/modernc.org/sqlite) driver.
-though CGO is required at build time due to the transitive `mattn/go-sqlite3`
-dependency from `gorm.io/driver/sqlite`.
 
 #### Schema
 
@@ -2206,12 +2229,16 @@ This means:
   buffer rather than spawning more goroutines.
 - **Independent results** — each worker records its own delivery result in the
   per-webhook database without coordination.
-- **Graceful shutdown** — cancel the context, workers finish their current task
+- **Graceful shutdown** — the stop hook cancels the workers' context. A worker
-  and exit. The stop hook waits for the pool via `lifecycle.WaitForShutdown`,
+  may still take tasks already queued before it exits. An `http` or `slack`
-  which bounds that wait by fx's stop timeout rather than blocking forever on a
+  request in flight is cut off, and one started after the cancel fails at once.
-  wedged worker. On timeout it logs at `ERROR` and returns an error, and the
+  Neither is recorded or counted in the metrics, and the next start sends the
-  goroutines that did not finish are still running — an unclean shutdown is
+  delivery again (see Shutdown). A `database` or `log` task runs as normal. The
-  reported rather than hidden.
+  stop hook waits for the pool via `lifecycle.WaitForShutdown`, which bounds
+  that wait by fx's stop timeout rather than blocking forever on a wedged
+  worker. On timeout it logs at `ERROR` and returns an error, and the goroutines
+  that did not finish are still running — an unclean shutdown is reported rather
+  than hidden.
 
 **Recovery paths:**
 
@@ -2317,7 +2344,7 @@ getting anywhere.
 | Metric                                 | Type      | Meaning                                                                                                                                                                                                                                                                                                   |
 | -------------------------------------- | --------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `webhooker_events_received_total`      | counter   | Events received and durably stored. Compare against the delivery counters on one dashboard                                                                                                                                                                                                                |
-| `webhooker_delivery_attempts_total`    | counter   | Delivery attempts actually dispatched to a target. A delivery a circuit breaker refused is not one: it is counted as a retry instead, but only when the refusal moves it into `retrying`                                                                                                                  |
+| `webhooker_delivery_attempts_total`    | counter   | Delivery attempts actually dispatched to a target. A delivery a circuit breaker refused is not one: it is counted as a retry instead, but only when the refusal moves it into `retrying`. An attempt cut off by a stop is not counted (see Shutdown)                                                      |
 | `webhooker_deliveries_succeeded_total` | counter   | Deliveries that reached `delivered`                                                                                                                                                                                                                                                                       |
 | `webhooker_deliveries_failed_total`    | counter   | Deliveries that failed terminally and will not be retried                                                                                                                                                                                                                                                 |
 | `webhooker_delivery_retries_total`     | counter   | Deliveries put back into `retrying`                                                                                                                                                                                                                                                                       |
@@ -2416,27 +2443,32 @@ log volume it caps rather than eliminates. A path that names no entrypoint is
 recorded by the handler at `DEBUG`, and the aggregate limiter logs its own
 rejections at `DEBUG` and without the path, so neither appears at all under the
 default level. The per-entrypoint limiter is the loud one: it logs every
-rejection at `WARN` with the request path, which on this route is
+rejection at `WARN`, naming the route pattern `/h/{uuid}` rather than the
-attacker-controlled text. A client hammering a single invented path is served
+request path. A client hammering a single invented path is served
 `RECEIVER_RATE_LIMIT` requests and has the rest of its aggregate budget rejected
 there, so the aggregate limit is what bounds the _number_ of those `WARN` lines
 — to under ten times `RECEIVER_RATE_LIMIT` per minute per client IP, 1080 at the
-defaults, where before it there was no bound at all. Their _width_ is bounded by
+defaults, where before it there was no bound at all. The access log is bounded
-the field budgets below, the same ones the access log spends. The access log is
+by neither limit: every request is recorded once at `INFO`, served or rejected
-bounded by neither limit: every request is recorded once at `INFO`, served or
+alike.
-rejected alike.
 
-What the access log does bound is the _content_ of those lines. A 3xx or 4xx
+What the access log does bound is the _content_ of those lines. On the receiver
-response logs the chi route pattern — `/h/{uuid}`, `/user/{username}//`, or the
+route it logs the route pattern `/h/{uuid}` whatever the status, because the
-literal `(unmatched)` when the request hit no route at all — in place of the
+concrete path carries the entrypoint UUID, which is the entrypoint's credential
-concrete URL. Those are the outcomes an unauthenticated client can drive for
+(see
-free: 404 and 429 on any invented receiver path, a login redirect on any
+[The entrypoint URL is the authentication secret](#the-entrypoint-url-is-the-authentication-secret)).
-invented profile path. Logging the URL there would let a flood write text of its
+A request chi never routed, because it matched no route or because a middleware
-own choosing, at a length of its own choosing, into the log. 2xx and 5xx
+answered it first, logs the literal `(unmatched)` whatever the status. In the
-responses keep the concrete path — a success resolved against a static route or
+`dev` environment the CORS middleware answers a preflight that way, so a
-against the operator's own data (on the receiver, against a stored entrypoint
+preflight to the receiver does not log its UUID either. On every other route, a
-UUID), and a 5xx is a bug in this service, where the exact path is the evidence
+3xx or 4xx response logs the chi route pattern, such as `/user/{username}//`, in
-and no client can provoke one at will.
+place of the concrete URL. Those are the outcomes an unauthenticated client can
+drive for free: a 404 on any invented path, a login redirect on any invented
+profile path. Logging the URL there would let a flood write text of its own
+choosing, at a length of its own choosing, into the log. 2xx and 5xx responses
+keep the concrete path — a success resolved against a static route or against
+the operator's own data, and a 5xx is a bug in this service, where the exact
+path is the evidence and no client can provoke one at will.
 
 The query string is never logged; it is replaced by the fixed marker
 `?(redacted)`. It is client-chosen on every route, and
@@ -2448,6 +2480,11 @@ to, `notice`, which names the line a page shows after an action, and the event
 log's `show`, which picks the events it lists. A query string sent to an
 entrypoint is not lost either: the event stores it, and the event log shows it.
 
+The `referer` field keeps only the scheme and host of the request's `Referer`,
+and logs `(redacted)` for one without them, because its path can be an
+entrypoint URL: a sender that follows the `http://` to `https://` redirect in
+the nginx example sends the URL it was redirected from.
+
 Client-supplied request content does not leave the host by the other route
 either. The Sentry SDK attaches the request to every event it captures,
 independently of the access log, and `SendDefaultPII=false` does not cover all
@@ -2457,14 +2494,18 @@ are both taken unconditionally, the body precisely because these handlers call
 body with `(redacted)`, drops cookies and the remote-address environment, and
 reduces the headers to a fixed allowlist — `Accept`, `Content-Length`,
 `Content-Type`, `Host`, `Origin`, `Referer`, `User-Agent` and `X-Request-Id`.
+`Referer` is sent as its scheme and host only, because its path can be an
+entrypoint URL; `internal/referer.SchemeAndHost` does that reduction for both
+the access log's `referer` field and this hook.
 
 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 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
+deliver. What is sent is the chi route pattern instead: `http://host/h/{uuid}`.
-the rule the access log follows above does not carry across that boundary. What
+A tracker has its own retention, access control and deletion policy, so the
-is sent is the chi route pattern instead: `http://host/h/{uuid}`.
+pattern is sent on every route, including the 2xx and 5xx responses outside the
+receiver for which the access log keeps the concrete path.
 
 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 appending a query string
@@ -2526,8 +2567,9 @@ receiver route. What survives still names the failing route — scheme, host,
 route pattern, method — and `X-Request-Id` ties the event to the local access
 log line that holds the rest. Nothing dropped is needed for the likeliest use,
 debugging a CSRF rejection. Its three inputs are the TLS decision, `Origin` and
-`Referer`; the latter two are kept, and the first is the scheme of the retained
+`Referer`; the latter two are kept (`Referer` as its scheme and host, which is
-URL, because the SDK derives that scheme from
+all the check compares), and the first is the scheme of the retained URL,
+because the SDK derives that scheme from
 `r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https"`. That predicate
 is the SDK's own and is stricter than `internal/reqtls.IsTLS`, which this
 service now uses everywhere it decides transport: the SDK reports `http` for the
@@ -2593,9 +2635,7 @@ than it:
 | ------------------------------------------ | ------- | ------------------- | ------------------------------------------ |
 | `request body exceeds limit` (413)         | `WARN`  | path, method        | yes — `MaxBodySize` precedes `RequireAuth` |
 | `csrf: token validation failed` (403)      | `WARN`  | path, method        | yes — `CSRF` precedes `RequireAuth`        |
-| `... rate limit exceeded` (429)            | `WARN`  | path                | yes, on the receiver                       |
 | `auth middleware: unauthenticated request` | `DEBUG` | path, method        | yes, by definition                         |
-| `entrypoint not found`                     | `DEBUG` | entrypoint UUID     | yes, on the receiver                       |
 | `user not found` / `invalid password`      | `DEBUG` | username            | yes, on the sign-in form                   |
 | `login failure limit exceeded` (429)       | `WARN`  | path                | yes, on the sign-in form                   |
 | `password verification capacity exhausted` | `WARN`  | path                | yes, on the sign-in form                   |
@@ -2623,13 +2663,12 @@ wider of the two handlers spends more on than the client spent sending them.
 Every case holds each line to the 2,560-byte ceiling. That per-line ceiling is
 what the figure above states, and every row establishes it.
 
-Three of the sites go further and bound the whole flood's output — the total
+Two of the sites go further and bound the whole flood's output — the total bytes
-bytes a run of distinct invented values wrote, which is the shape an operator
+a run of distinct invented values wrote, which is the shape an operator sizing
-sizing storage cares about. They are `request body exceeds limit`
+storage cares about. They are `request body exceeds limit`
-(`TestMaxBodySize_FloodOfOversizePathsDoesNotGrowTheLog`),
+(`TestMaxBodySize_FloodOfOversizePathsDoesNotGrowTheLog`) and `user not found`
-`entrypoint not found` and `user not found` (the last two through
+(through `assertBoundedFlood`). The other rows carry no aggregate assertion; the
-`assertBoundedFlood`). The other rows carry no aggregate assertion; the per-line
+per-line ceiling is what they establish.
-ceiling is what they establish.
 
 `internal/logfield/logfield_test.go` measures the per-rune charge against what
 the handlers really emit, over roughly 3,000 code points on each, so an
@@ -2647,7 +2686,7 @@ everything else, so its lines take the level the operator set and the handler
 `internal/logger` selected, and every value it emits is spent through the same
 `internal/logfield` budget. A record-not-found is not logged as an error: it is
 the expected outcome on both of those paths, and each handler already records
-its own miss at `DEBUG` — bounded, per the table above — without the SQL. Slow
+its own miss at `DEBUG`, without the SQL and within the ceiling above. Slow
 statements are kept, at `WARN`, above the same 200 ms threshold GORM used and
 with the statement bounded, because that report is the one thing GORM's logger
 gave an operator that nothing else here does. The adapter orders its cases
@@ -3062,6 +3101,8 @@ webhooker/
 │   │   ├── ratelimit.go       # Per-IP rate limiting middleware (go-chi/httprate)
 │   │   ├── loginguard.go      # Login failure counters and the Argon2id verification semaphore
 │   │   └── middlewaretest/    # Test support: a Middleware for tests in other packages
+│   ├── referer/
+│   │   └── referer.go         # SchemeAndHost: cuts a Referer down to its scheme and host, for the access log and the Sentry hook
 │   ├── reqtls/
 │   │   └── reqtls.go          # IsTLS: the one TLS predicate, r.TLS or X-Forwarded-Proto
 │   ├── server/
@@ -3076,8 +3117,8 @@ webhooker/
 │   ├── static.go              # //go:embed directive
 │   ├── css/input.css          # Tailwind input, source for tailwind.css (make css)
 │   ├── css/tailwind.css       # Generated stylesheet the pages load
-│   ├── css/style.css          # Hand-written, loaded after tailwind.css: btn-small, the pointer cursor for input.css's buttons, the webhook list cards' focus outline
+│   ├── css/style.css          # Hand-written, loaded after tailwind.css: btn-small, the pointer cursor for input.css's buttons, the webhook list cards' focus outline, the rule hiding x-cloak elements
-│   ├── js/app.js              # Copy-to-clipboard, and the Alpine.js components
+│   ├── js/app.js              # Copy-to-clipboard, the delete prompts, and the Alpine.js components
 │   └── js/alpine.min.js       # Alpine.js CSP build, extracted from 3p/ by make assets, not committed
 ├── templates/                 # Go HTML templates (base, login, sources, etc.)
 ├── script/                    # Scripts to Rule Them All entrypoints
@@ -3131,8 +3172,9 @@ Applied to all routes in this order:
 
 1. **RequestID** — Generate unique request IDs (chi built-in)
 2. **SecurityHeaders** — Production security headers on every response (HSTS
-   unless `HSTS_MAX_AGE` is `0`, X-Content-Type-Options, X-Frame-Options, CSP,
+   unless `HSTS_MAX_AGE` is `0`, X-Content-Type-Options, X-Frame-Options, CSP
-   Referrer-Policy, Permissions-Policy)
+   `default-src 'self'; script-src 'self'; style-src 'self'`, Referrer-Policy,
+   Permissions-Policy)
 3. **Logging** — Structured request logging (method, URL, status, latency,
    remote IP, client IP, user agent, request ID)
 4. **Metrics** — Prometheus HTTP metrics (if `METRICS_USERNAME` and
@@ -3217,6 +3259,12 @@ credential check, see [The login endpoint](#the-login-endpoint).
 - Production security headers on all responses: HSTS (unless `HSTS_MAX_AGE` is
   `0`), X-Content-Type-Options (`nosniff`), X-Frame-Options (`DENY`),
   Content-Security-Policy, Referrer-Policy, and Permissions-Policy
+- The Content-Security-Policy is
+  `default-src 'self'; script-src 'self'; style-src 'self'`: a page takes
+  scripts and styles only from files webhooker serves, and the browser runs no
+  inline script or event handler and ignores any `<style>` element or `style`
+  attribute in a page. The pages need none: their scripts are in `static/js/`
+  and their styles in `static/css/`
 - Request body size limits (1 MB) on all form POST endpoints, enforced by
   middleware that runs before CSRF parses the form
 - **CSRF protection** via [gorilla/csrf](https://github.com/gorilla/csrf) on all
@@ -3284,7 +3332,8 @@ stop-hook log:
 3. `server` — the HTTP drain, bounded by `server.ShutdownTimeout` (**3
    seconds**) and by what the hooks before it left, then a Sentry flush if
    `SENTRY_DSN` is set
-4. `delivery.Engine` — waits for its workers, then closes the archive databases
+4. `delivery.Engine` — cuts off any `http` or `slack` request in flight, waits
+   for its workers, then closes the archive databases
 5. `healthcheck`
 6. `WebhookDBManager`
 7. the database close
@@ -3295,6 +3344,12 @@ by the stop context, so a wedge there consumes the 5 seconds before the HTTP
 server hook is ever entered. The hooks after the server are microsecond-scale in
 normal operation.
 
+The delivery engine cancels a delivery request in flight. That attempt is not
+recorded or counted in the metrics, and the delivery keeps its `pending` or
+`retrying` status, so startup recovery sends it again on the next start (see
+Recovery paths under Bounded Worker Pool). If the receiver already had it, it
+receives it twice: the at-least-once duplicate described under Rationale.
+
 The HTTP drain budget is deliberately **shorter** than the sequence budget. Were
 the two equal, a drain that used its whole budget would exhaust the sequence
 budget at the instant it finished, and every later hook — the delivery engine,
@@ -3417,14 +3472,12 @@ fixed independently of the compiler's:
    a step's log, and then fails. `make test` builds this stage alone.
 6. **Builder stage** (`golang:1.26.1-bookworm`) — depends on the lint and test
    phases and the `css-check` and `markdown-check` stages passing (it copies a
-   file from each), runs `make build` (which extracts Alpine.js from `3p/`
+   file from each), and runs `make build` (which extracts Alpine.js from `3p/`
-   first), and then rebuilds the binary with `CGO_ENABLED=1` and static linking
+   first). `make build` compiles with cgo off, so the binary is statically
-   so it runs on musl. Both builds go through `make build`, the relink adding
+   linked and runs on the Alpine runtime image. The version is the `VERSION`
-   its `-extldflags` via `GO_LDFLAGS`, so neither can drop the `-X` that stamps
+   build arg if one is given, otherwise derived from the `.git` in the context,
-   the version. The version is the `VERSION` build arg if one is given,
+   and the stage fails if a context with `.git` would stamp an empty version,
-   otherwise derived from the `.git` in the context, and the stage fails if a
+   `dev` or `unknown` (see [Version stamping](#version-stamping)).
-   context with `.git` would stamp an empty version, `dev` or `unknown` (see
-   [Version stamping](#version-stamping)).
 7. **Runtime stage** (`alpine:3.21`) — copies the static binary and
    `deploy/docker-entrypoint.sh`, creates the `/var/lib/webhooker` directory for
    all SQLite databases, exposes port 8080, and includes a health check against
@@ -3436,11 +3489,6 @@ The lint and test phases invoke `gofmt`, `golangci-lint` and `go test` directly
 rather than `make fmt-check`, `make lint` and `make test`: those targets build
 docker stages, which would need a docker daemon inside this build.
 
-The lint phase and the Go stages use Debian rather than Alpine because
-`gorm.io/driver/sqlite` pulls in `mattn/go-sqlite3`, which needs CGO and does
-not compile against musl. Only the final binary is statically linked, which is
-what lets it run on the Alpine runtime image.
-
 `script/cibuild` is the CI gate: it runs `script/bootstrap`, then
 `script/check`, then builds the image, whose build runs the lint and test phases
 and the stylesheet and Markdown checks again. A build that succeeds is a repo

internal/database/model_event.go

@@ -45,8 +45,7 @@ type Event struct {
 
 	// ResubmittedFromID names the event this one was copied from by
 	// an operator resubmit. It is nil for an event that arrived on
-	// the receiver, which is every event created before the column
+	// the receiver. It is not a foreign key: the source event can be
-	// existed. It is not a foreign key: the source event can be
 	// reaped by retention while its copies remain, and the id is
 	// kept as the record of where the copy came from either way.
 	ResubmittedFromID *string `gorm:"type:uuid;index:idx_events_resubmitted_from_id,priority:1;index:idx_events_entrypoint_id,priority:3" json:"resubmittedFromId,omitempty"`

internal/database/model_webhook.go

@@ -82,7 +82,7 @@ type Webhook struct {
 // value while building the insert statement, which runs after
 // BeforeSave; rewriting any later than this loses that race and the
 // row lands at 30 days. Living on the model also means a future call
-// site — a REST API, a fixture, a migration — cannot bypass it.
+// site, such as a REST API or a fixture, cannot bypass it.
 func (w *Webhook) BeforeSave(_ *gorm.DB) error {
 	if w.RetentionDays <= 0 {
 		w.RetentionDays = RetentionForeverDays
@@ -98,8 +98,8 @@ func (w *Webhook) BeforeSave(_ *gorm.DB) error {
 // are exempt from reaping.
 //
 // It accepts the RetentionForeverDays sentinel written by BeforeSave
-// and, defensively, the non-positive values that rows written before
+// and, defensively, any non-positive value, which BeforeSave treats
-// the sentinel existed may still carry.
+// as a request to retain forever.
 func retainsForever(retentionDays int) bool {
 	return retentionDays <= 0 ||
 		retentionDays >= RetentionForeverDays

internal/database/retention.go

@@ -253,7 +253,7 @@ func (r *RetentionReaper) reapWebhook(
 // row in the database: the sweep then deletes every event, delivery,
 // and delivery result, including ones created seconds ago. Rejecting
 // out-of-range input at the form is the primary guard; saturating here
-// means an old row, a migration, or a future call site cannot turn a
+// means a value that reaches the row by any other path cannot turn a
 // too-large retention into total data loss.
 func retentionCutoff(
 	now time.Time,

internal/database/sqlite_open.go

@@ -118,9 +118,8 @@ const SQLiteFilePerm fs.FileMode = 0o600
 // SQLite still reports the absence rather than this function
 // materializing an empty database the caller asked not to create.
 //
-// Chmod of a file that already exists is what tightens a data
+// The mode is set on every open, whoever created the file, so a
-// directory an earlier build left at 0644 — including a developer's
+// database or sidecar found at a wider mode is tightened too.
-// own scratch directory — without any migration machinery.
 func reserveSQLiteFile(path string, create bool) error {
 	if create {
 		// gosec G304: the path is the database file the caller asked

internal/delivery/archive_sweeper.go

@@ -201,8 +201,7 @@ func (s *ArchiveSweeper) sweep(ctx context.Context) {
 
 // sweepTarget prunes the archive of a single database target.
 // A missing, empty, or "never" expiry parses as a zero duration
-// and is skipped entirely, so those archives keep exactly the
+// and is skipped entirely, so those archives are never pruned.
-// behaviour they had before the sweep existed.
 func (s *ArchiveSweeper) sweepTarget(target *database.Target) {
 	expiry, err := parseArchiveExpiry(target.Config)
 	if err != nil {

internal/delivery/delivery_totals_test.go

@@ -32,8 +32,9 @@ func targetTotals(
 
 // TestUpdateDeliveryStatus_FinishTimeAndTargetTotals pins what a status
 // write records for the webhook page's statistics: the time a delivery
-// finished, set only when it becomes delivered or failed, and one more
+// finished, set only when it becomes delivered or failed and stored in
-// on its target's delivered or failed total.
+// the same form as created_at, and one more on its target's delivered
+// or failed total.
 func TestUpdateDeliveryStatus_FinishTimeAndTargetTotals(t *testing.T) {
 	t.Parallel()
 
@@ -75,6 +76,16 @@ func TestUpdateDeliveryStatus_FinishTimeAndTargetTotals(t *testing.T) {
 			if tt.finished {
 				require.NotNil(t, stored.FinishedAt)
 				assert.False(t, stored.FinishedAt.Before(before))
+
+				var createdAt, finishedAt string
+
+				require.NoError(t, db.Raw(
+					`SELECT CAST(created_at AS TEXT),
+						CAST(finished_at AS TEXT)
+					FROM deliveries WHERE id = ?`, d.ID,
+				).Row().Scan(&createdAt, &finishedAt))
+				assertStoredTime(t, createdAt)
+				assertStoredTime(t, finishedAt)
 			} else {
 				assert.Nil(t, stored.FinishedAt)
 			}

internal/delivery/engine.go

@@ -1702,7 +1702,10 @@ func writeDeliveryStatus(
 		}).
 		Updates(map[string]any{
 			"status": status,
-			"finished_at": time.Now(),
+			// GORM's clock, the one that stamps created_at. A bare
+			// time.Now() carries a monotonic clock reading, which the
+			// driver would store as an " m=+…" suffix.
+			"finished_at": tx.NowFunc(),
 		})
 	if res.Error != nil || res.RowsAffected == 0 {
 		return res.Error
@@ -1906,12 +1909,13 @@ func (e *Engine) takeForRedispatch(
 		return false
 	}
 
+	// GORM's clock, as writeDeliveryStatus explains.
 	res := webhookDB.
 		Model(&database.Delivery{}).
 		Where(
 			"id = ? AND status = ?", deliveryID, eligible,
 		).
-		UpdateColumn("updated_at", time.Now())
+		UpdateColumn("updated_at", webhookDB.NowFunc())
 
 	if res.Error != nil {
 		e.log.Error(

internal/delivery/engine_lifecycle_test.go

@@ -2,11 +2,16 @@ package delivery_test
 
 import (
 	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
 	"path/filepath"
+	"sync"
 	"testing"
 	"time"
 
 	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/fx"
 	"gorm.io/gorm/clause"
@@ -272,6 +277,154 @@ func TestEngine_StopHookHonoursStopTimeout(t *testing.T) {
 	requireStopHookExpires(t, lc.hooks[0], "delivery engine")
 }
 
+// seedHeldDelivery gives the setup's webhook an http target with
+// maxRetries, pointed at a receiver that keeps every request open until
+// the client gives up on it, and seeds one delivery to that target at
+// status. It returns the task that sends attempt attemptNum of the
+// delivery, and a channel that is closed when a request reaches the
+// receiver.
+func seedHeldDelivery(
+	t *testing.T,
+	s iSetup,
+	maxRetries int,
+	status database.DeliveryStatus,
+	attemptNum int,
+) (delivery.Task, <-chan struct{}) {
+	t.Helper()
+
+	arrived := make(chan struct{})
+
+	var once sync.Once
+
+	ts := httptest.NewServer(http.HandlerFunc(
+		func(_ http.ResponseWriter, r *http.Request) {
+			// The server notices the client hanging up only once the
+			// body has been read; until then r.Context() never ends.
+			_, _ = io.Copy(io.Discard, r.Body)
+
+			once.Do(func() { close(arrived) })
+
+			<-r.Context().Done()
+		},
+	))
+	t.Cleanup(ts.Close)
+
+	cfg := iHTTPConfig(ts.URL)
+	targetID := uuid.New().String()
+
+	iCreateWebhook(t, s.MainDB, s.WebhookID, "hook")
+	iCreateTarget(
+		t, s.MainDB, targetID, s.WebhookID, "held",
+		database.TargetTypeHTTP, cfg, maxRetries,
+	)
+
+	event := iSeedEvent(t, s.WebhookDB, s.WebhookID, `{"held":true}`)
+	d := iSeedDelivery(t, s.WebhookDB, event.ID, targetID, status)
+
+	bodyStr := event.Body
+
+	return iTask(
+		d, event, s.WebhookID, targetID, "held", cfg,
+		maxRetries, attemptNum, &bodyStr,
+	), arrived
+}
+
+// stopDuringAttempt waits until the receiver holds an attempt open, then
+// stops the engine through its real stop hook.
+func stopDuringAttempt(
+	t *testing.T, lc *recordingLifecycle, arrived <-chan struct{},
+) {
+	t.Helper()
+
+	select {
+	case <-arrived:
+	case <-time.After(5 * time.Second):
+		t.Fatal("the delivery attempt never reached the receiver")
+	}
+
+	require.NoError(t, lc.hooks[0].OnStop(context.Background()))
+}
+
+// requireRequeued runs restart recovery on the stopped engine and
+// requires it to queue task's attempt again on ch.
+func requireRequeued(
+	t *testing.T, s iSetup, ch <-chan delivery.Task, task delivery.Task,
+) {
+	t.Helper()
+
+	s.Engine.ExportRecoverWebhookDeliveries(
+		context.Background(), s.WebhookID,
+	)
+
+	select {
+	case got := <-ch:
+		assert.Equal(t, task.DeliveryID, got.DeliveryID)
+		assert.Equal(t, task.AttemptNum, got.AttemptNum)
+	case <-time.After(5 * time.Second):
+		t.Fatal("restart recovery did not queue the delivery again")
+	}
+}
+
+// TestEngine_StopLeavesFireAndForgetAttemptPending is the regression
+// test for a stop that turned an attempt in flight into a terminal
+// failure. Stopping the engine cancels the request; for a target with
+// no retries that was the delivery's only attempt, recorded as failed
+// with "context canceled", and nothing ever sent it again. The
+// delivery must instead stay pending, with no result and no count in
+// the attempt metrics, for restart recovery to send.
+func TestEngine_StopLeavesFireAndForgetAttemptPending(t *testing.T) {
+	t.Parallel()
+
+	s := newISetup(t)
+	reg := mIsolate(t, s)
+	lc := startEngineViaHook(t, s.Engine)
+
+	task, arrived := seedHeldDelivery(
+		t, s, 0, database.DeliveryStatusPending, 1,
+	)
+
+	s.Engine.Notify([]delivery.Task{task})
+	stopDuringAttempt(t, lc, arrived)
+
+	iAssertStatus(
+		t, s.WebhookDB, task.DeliveryID, database.DeliveryStatusPending,
+	)
+	assert.Empty(t, iResults(t, s.WebhookDB, task.DeliveryID))
+	assert.Zero(t, mCounter(t, reg, mAttempts, mTypeHTTP))
+	assert.Zero(t, mHTTPDurations(t, reg))
+
+	requireRequeued(t, s, s.Engine.ExportDeliveryCh(), task)
+}
+
+// TestEngine_StopLeavesLastRetryAttemptRetrying is the same regression
+// for a target with retries, on its last attempt: the cancelled attempt
+// used to exhaust the retries and end the delivery failed. It must stay
+// retrying with only its earlier attempt recorded, and restart recovery
+// must send that last attempt again.
+func TestEngine_StopLeavesLastRetryAttemptRetrying(t *testing.T) {
+	t.Parallel()
+
+	const maxRetries = 2
+
+	s := newISetup(t)
+	lc := startEngineViaHook(t, s.Engine)
+
+	task, arrived := seedHeldDelivery(
+		t, s, maxRetries, database.DeliveryStatusRetrying, maxRetries,
+	)
+	iSeedFailedResult(t, s.WebhookDB, task.DeliveryID)
+
+	s.Engine.ExportScheduleRetry(task, 0)
+	stopDuringAttempt(t, lc, arrived)
+
+	iAssertStatus(
+		t, s.WebhookDB, task.DeliveryID, database.DeliveryStatusRetrying,
+	)
+	assert.Len(t, iResults(t, s.WebhookDB, task.DeliveryID), 1)
+
+	requireRequeued(t, s, s.Engine.ExportRetryCh(), task)
+}
+
 // deliverToArchive gives the setup's webhook a database target,
 // runs one delivery to it through the running engine, and returns
 // the target's ID and archive file path. The archive writer holds

internal/delivery/engine_test.go

@@ -117,6 +117,18 @@ func seedDelivery(
 	return d
 }
 
+// assertStoredTime asserts that text, a timestamp as SQLite holds it,
+// is in the form GORM stores created_at in: the layout of
+// time.Time.String, with no " m=+…" monotonic clock reading after it.
+func assertStoredTime(t *testing.T, text string) {
+	t.Helper()
+
+	_, err := time.Parse(
+		"2006-01-02 15:04:05.999999999 -0700 MST", text,
+	)
+	assert.NoError(t, err, "stored as %q", text)
+}
+
 // httpDeliveryFixture holds the task and delivery needed
 // for HTTP delivery tests.
 type httpDeliveryFixture struct {

internal/delivery/inflight_test.go

@@ -462,7 +462,8 @@ func TestScheduledRetryIsNotSweptDuringBackoff(t *testing.T) {
 
 // TestRedispatchStampsTheRow pins the cadence control: a stranded
 // delivery that has just been handed out is not selected again by the
-// next tick a minute later.
+// next tick a minute later. The stamp is stored in the same form as
+// created_at.
 func TestRedispatchStampsTheRow(t *testing.T) {
 	t.Parallel()
 
@@ -493,4 +494,13 @@ func TestRedispatchStampsTheRow(t *testing.T) {
 		"a re-dispatched delivery must be stamped so the "+
 			"next tick does not select it again",
 	)
+
+	var createdAt, updatedAt string
+
+	require.NoError(t, s.WebhookDB.Raw(
+		`SELECT CAST(created_at AS TEXT), CAST(updated_at AS TEXT)
+		FROM deliveries WHERE id = ?`, d.ID,
+	).Row().Scan(&createdAt, &updatedAt))
+	assertStoredTime(t, createdAt)
+	assertStoredTime(t, updatedAt)
 }

internal/delivery/target.go

@@ -32,7 +32,8 @@ type Scheduler interface {
 // Engine.observeAttempt, alongside the DeliveryResult it records for
 // it. Deliver is also entered for attempts that never happen — an
 // open circuit breaker refuses one — so the count cannot be taken
-// from around this call.
+// from around this call. An attempt cut off by a stop is neither
+// counted nor recorded.
 type Target interface {
 	Deliver(
 		ctx context.Context,

internal/delivery/target_database_archive.go

@@ -277,7 +277,11 @@ func (w *archiveWriter) write(
 		}
 	}
 
-	row.ArchivedAt = time.Now()
+	// GORM's clock, the one that stamps created_at in the other
+	// databases, so this is stored in the same form. A bare time.Now()
+	// carries a monotonic clock reading, which the driver would store
+	// as an " m=+…" suffix.
+	row.ArchivedAt = w.db.NowFunc()
 
 	err := w.db.Create(&row).Error
 	if err != nil {

internal/delivery/target_database_test.go

@@ -150,6 +150,13 @@ func TestArchiveWriter_WritesRow(t *testing.T) {
 	assert.Equal(t, row.ContentType, got[0].ContentType)
 	assert.JSONEq(t, `{"hello":"world"}`, got[0].Body)
 	assert.False(t, got[0].ArchivedAt.IsZero())
+
+	var archivedAt string
+
+	require.NoError(t, w.DB().Raw(
+		"SELECT CAST(archived_at AS TEXT) FROM archived_events",
+	).Row().Scan(&archivedAt))
+	assertStoredTime(t, archivedAt)
 }
 
 func TestArchiveWriter_RecreatesAfterRemoval(

internal/delivery/target_headers.go

@@ -82,8 +82,8 @@ func isReservedTargetHeader(name string) bool {
 // one pair silently overwriting the other.
 //
 // An input with no pairs yields an empty map, which omitempty drops
-// from the stored config: a target configured with no headers keeps
+// from the stored config, so a target configured with no headers
-// the same config JSON it had before this field existed.
+// stores no headers key at all.
 func ParseTargetHeaders(raw string) (map[string]string, error) {
 	headers := make(map[string]string)
 

internal/delivery/target_http.go

@@ -57,7 +57,11 @@ type httpCore struct {
 // recorded and no circuit breaker is consulted. A positive
 // maxRetries gates the attempt on the circuit breaker and
 // schedules a backed-off retry on failure.
+//
+// ctx is the context attempt sends its request with. Stopping the
+// engine cancels it; see interruptedByStop.
 func (c *httpCore) deliver(
+	ctx context.Context,
 	webhookDB *gorm.DB,
 	d *database.Delivery,
 	task *Task,
@@ -66,21 +70,55 @@ func (c *httpCore) deliver(
 	attempt func() attemptResult,
 ) {
 	if maxRetries == 0 {
-		c.fireAndForget(webhookDB, d, attempt())
+		c.fireAndForget(ctx, webhookDB, d, attempt())
 
 		return
 	}
 
 	c.withRetry(
-		webhookDB, d, task, sched, maxRetries, attempt,
+		ctx, webhookDB, d, task, sched, maxRetries, attempt,
 	)
 }
 
+// interruptedByStop reports whether an attempt failed because the
+// engine is stopping, which cancels the context its request is made
+// with. Such an attempt is not recorded: no DeliveryResult, no circuit
+// breaker outcome, no status change, no count in the attempt metrics.
+// The delivery stays pending or retrying, and startup recovery sends
+// it again on the next start.
+//
+// A target's own timeout leaves that context alone, so its attempt is
+// still recorded as the failure it is.
+func (c *httpCore) interruptedByStop(
+	ctx context.Context,
+	d *database.Delivery,
+	res attemptResult,
+) bool {
+	if res.success || ctx.Err() == nil {
+		return false
+	}
+
+	c.eng.log.Warn(
+		"delivery attempt interrupted by shutdown; not recorded, "+
+			"it is sent again on the next start",
+		"delivery_id", d.ID,
+		"event_id", d.EventID,
+		"target_id", d.TargetID,
+	)
+
+	return true
+}
+
 func (c *httpCore) fireAndForget(
+	ctx context.Context,
 	webhookDB *gorm.DB,
 	d *database.Delivery,
 	res attemptResult,
 ) {
+	if c.interruptedByStop(ctx, d, res) {
+		return
+	}
+
 	c.eng.observeAttempt(d.Target.Type, res.elapsed())
 
 	err := c.eng.recordResult(
@@ -110,6 +148,7 @@ func (c *httpCore) fireAndForget(
 }
 
 func (c *httpCore) withRetry(
+	ctx context.Context,
 	webhookDB *gorm.DB,
 	d *database.Delivery,
 	task *Task,
@@ -131,6 +170,10 @@ func (c *httpCore) withRetry(
 
 	res := attempt()
 
+	if c.interruptedByStop(ctx, d, res) {
+		return
+	}
+
 	c.eng.observeAttempt(d.Target.Type, res.elapsed())
 
 	err := c.eng.recordResult(
@@ -395,7 +438,7 @@ func (t *httpTarget) Deliver(
 	}
 
 	t.deliver(
-		webhookDB, d, task, sched,
+		ctx, webhookDB, d, task, sched,
 		d.Target.MaxRetries, attempt,
 	)
 }

internal/delivery/target_redact.go

@@ -13,9 +13,9 @@ import (
 const RedactionMarker = "(redacted)"
 
 // Redactor removes one target's own credential material from
-// text that target's remote peer chose: a delivery response
+// a delivery response body, whose text the target's remote
-// body, or a delivery error stored before the delivery path
+// peer chose, and from a stored delivery error as a second
-// learned to mask the URLs it embeds.
+// line behind the delivery path's own URL masking.
 //
 // It removes byte-identical echoes of strings taken from the
 // target's stored configuration, and nothing else. Anything

internal/delivery/target_slack.go

@@ -82,7 +82,7 @@ func (t *slackTarget) Deliver(
 	}
 
 	t.deliver(
-		webhookDB, d, task, sched,
+		ctx, webhookDB, d, task, sched,
 		d.Target.MaxRetries, attempt,
 	)
 }

internal/gormlog/gormlog_test.go

@@ -146,7 +146,7 @@ func openDB(
 }
 
 // assertBounded holds every line the adapter wrote to the stated
-// ceiling and proves each was cut rather than merely short.
+// ceiling and proves no line carried a whole client value.
 func assertBounded(t *testing.T, out string) {
 	t.Helper()
 

internal/handlers/delivery_result_view.go

@@ -12,13 +12,12 @@ import (
 //
 // The bound is enforced here and in SQL, because this page's
 // memory profile must not depend on a constant in another
-// package staying where it is, and because rows predating the
+// package staying where it is, or on every stored row having
-// delivery engine's own cap or restored from an archive are
+// been written by the delivery engine under its own cap.
-// not covered by it at all.
 //
 // It happens to equal that engine cap, so a row written by the
-// current engine reaches this one exactly and is never cut
+// engine reaches this one exactly and is never cut twice.
-// twice. Nothing here may assume the two differ: see view.
+// Nothing here may assume the two differ: see view.
 const maxRenderedResponseBytes = 4096
 
 // deliveryResultColumns is the delivery attempt projection.
@@ -40,9 +39,8 @@ const deliveryResultColumns = "delivery_id, attempt_num, created_at, " +
 //
 // Both Error and ResponseBody have been through the target's
 // Redactor. The engine already masks the URL out of the
-// errors it stores, so for errors this is a second line
+// errors it stores, so for errors this is a second line; for
-// covering rows written before it did; for response bodies it
+// response bodies it is the only line, and its reach is what
-// is the only line, and its reach is what
 // delivery.Redactor documents.
 type DeliveryResultView struct {
 	AttemptNum int

internal/handlers/delivery_result_view_test.go

@@ -158,8 +158,7 @@ func TestHandleSourceLogs_RendersFailedAttempt(t *testing.T) {
 // TestHandleSourceLogs_EscapesResponseBody proves the
 // response body is treated as the untrusted remote content it
 // is. The remote chooses these bytes and the page is rendered
-// inside the operator's authenticated origin, where the
+// inside the operator's authenticated origin.
-// application's own CSP allows inline script from 'self'.
 func TestHandleSourceLogs_EscapesResponseBody(t *testing.T) {
 	t.Parallel()
 

internal/handlers/event_body.go

@@ -35,11 +35,10 @@ const eventBodyQuery = "SELECT cast(body as blob) " +
 // response is deliberately not renderable. Content-Disposition
 // makes the browser download rather than display it, and the
 // octet-stream type plus nosniff stop it being interpreted as
-// HTML or script. Without those a stored payload would execute
+// HTML or script. Without those a stored payload would be shown
-// as the logged-in operator. The application's CSP does not
+// as a page of the operator's own origin. The application's CSP
-// help here: script-src allows 'unsafe-inline' from 'self', so
+// is a second defence behind them: it allows no inline script,
-// a document served from this origin could run its own inline
+// so such a page could not run script of its own.
-// script.
 func (h *Handlers) HandleEventBodyDownload() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		webhook, ok := h.ownedWebhook(w, r)

internal/handlers/event_detail_test.go

@@ -84,7 +84,7 @@ func TestHandleEventDetail_ShowsEventWholeWithDeliveries(t *testing.T) {
 	assert.Contains(t, page, strconv.Itoa(len(body))+" bytes")
 	assert.Contains(t, page, "{\n  "pad": "xxx")
 	assert.Contains(t, page, ""tail": ""+sentinel+""\n}")
-	assert.Contains(t, page, `style="max-height: 32rem; overflow-y: auto"`)
+	assert.Contains(t, page, `break-all max-h-[32rem] overflow-y-auto"`)
 	assert.NotContains(t, page, "Showing the first")
 	assert.Contains(t, page, target.Name)
 	assert.Contains(t, page, ">failed</span>")

internal/handlers/logbound_test.go

@@ -1,19 +1,15 @@
 package handlers_test
 
-// The handler-side half of the log-field audit. Two slog calls in
+// The handler-side half of the log-field audit. The slog calls in
-// this package reach a value an UNAUTHENTICATED client picks outright
+// this package that reach a value an UNAUTHENTICATED client picks
-// and of a length it picks outright:
+// outright, and of a length it picks outright, are the failed-login
+// DEBUG lines, whose username is a form field.
 //
-//   - the unknown-entrypoint DEBUG line on /h/{uuid}, whose
+// They are at DEBUG, which is off in production by default. That is
-//     path segment matched no stored entrypoint and so is bounded by
-//     nothing;
-//   - the failed-login DEBUG lines, whose username is a form field.
-//
-// Both are at DEBUG, which is off in production by default. That is
 // not a bound: an operator turning DEBUG on to diagnose a flood must
-// not thereby hand the flood an unbounded write. Both spend the same
+// not thereby hand the flood an unbounded write. They spend the same
-// internal/logfield budget as the access log, and both are held here
+// internal/logfield budget as the access log, and are held here to
-// to middleware.MaxAccessLogLineBytes.
+// middleware.MaxAccessLogLineBytes.
 //
 // The two login lines past the username lookup — "invalid password"
 // and "user logged in" — carry the same cap without needing it, since
@@ -195,13 +191,12 @@ func receiverRouter(h *handlers.Handlers) *chi.Mux {
 	return router
 }
 
-// postReceiver sends one POST at /h/<segment>.
+// postReceiver sends one POST with an empty body at /h/<segment>
+// through router and returns the response status.
 //
 // RawPath is cleared after parsing so chi routes on the decoded path
 // and the handler sees the raw bytes rather than their percent-escaped
-// spelling. That is the harder case for the budget: the escaped
+// spelling.
-// spelling is plain ASCII, which costs one byte per byte, while the
-// decoded bytes are what the log handler has to escape.
 func postReceiver(
 	t *testing.T, router *chi.Mux, segment string,
 ) int {
@@ -260,43 +255,6 @@ func postLoginWithPassword(
 	return w.Code
 }
 
-// TestUnknownEntrypoint_LogLineDoesNotTrackPathSize drives 8 KB of
-// client-chosen path at the unauthenticated receiver's
-// unknown-entrypoint DEBUG line and holds it to the same ceiling the
-// access log states.
-func TestUnknownEntrypoint_LogLineDoesNotTrackPathSize(t *testing.T) {
-	t.Parallel()
-
-	for handlerName, newHandler := range logHandlers() {
-		for fillName, fill := range escapeFills() {
-			t.Run(handlerName+"/"+fillName, func(t *testing.T) {
-				t.Parallel()
-
-				h, buf := capturingHandlers(t, newHandler)
-				router := receiverRouter(h)
-
-				for i := range floodRequests {
-					assert.Equal(
-						t,
-						http.StatusNotFound,
-						postReceiver(
-							t, router,
-							oversizedFill(fill)+
-								strings.Repeat("y", i),
-						),
-					)
-				}
-
-				lines := logLines(t, buf)
-				require.Len(t, lines, floodRequests)
-				assertNoClientText(t, buf)
-
-				assertBoundedFlood(t, buf.Len())
-			})
-		}
-	}
-}
-
 // TestFailedLogin_LogLineDoesNotTrackUsernameSize drives 8 KB of
 // client-chosen username at the unauthenticated login endpoint's
 // DEBUG line and holds it to the same ceiling.

internal/handlers/source_detail_test.go

@@ -273,7 +273,7 @@ func TestHandleSourceDetail_FitsWideAndNarrowWindows(t *testing.T) {
 
 	assert.Contains(
 		t, body,
-		`<div class="mx-auto px-6 py-8" style="max-width: 108rem"`,
+		`<div class="max-w-[108rem] mx-auto px-6 py-8">`,
 	)
 	assert.Contains(
 		t, body,
@@ -286,8 +286,8 @@ func TestHandleSourceDetail_FitsWideAndNarrowWindows(t *testing.T) {
 // target and says what deleting it loses, that the webhook's gives its
 // number of stored events (5 received, 2 removed by retention, so 3,
 // the statistics pane's "Within retention" figure), and that an
-// entrypoint with no description is named by its URL. The template
+// entrypoint with no description is named by its URL. Each prompt is
-// writes the slashes after http: as \/, which the browser reads as /.
+// its form's data-confirm attribute, where &#10; is a line break.
 func TestHandleSourceDetail_DeletePromptsNameWhatIsLost(t *testing.T) {
 	t.Parallel()
 
@@ -325,29 +325,28 @@ func TestHandleSourceDetail_DeletePromptsNameWhatIsLost(t *testing.T) {
 	body := renderSourceDetailPage(t, h, sess, wh.ID)
 
 	assert.Contains(t, body,
-		`Delete webhook &quot;delete-me&quot;?\n\n`+
+		`data-confirm="Delete webhook &quot;delete-me&quot;?&#10;&#10;`+
 			`This deletes its stored events (3) and their deliveries. `+
-			`Any archive files it wrote are kept.`)
+			`Any archive files it wrote are kept."`)
 	assert.Contains(t, body,
-		`Delete entrypoint &quot;Stripe&quot;?\n\n`+
+		`data-confirm="Delete entrypoint &quot;Stripe&quot;?&#10;&#10;`+
 			`Senders using its URL get an error from now on, `+
-			`and the URL cannot be restored.`)
+			`and the URL cannot be restored."`)
 	assert.Contains(t, body,
-		`Delete entrypoint &quot;http:\/\/example.com/h/`+
+		`data-confirm="Delete entrypoint &quot;http://example.com/h/`+
-			unnamed.Path+`&quot;?`)
+			unnamed.Path+`&quot;?&#10;&#10;`)
 	assert.Contains(t, body,
-		`Delete target &quot;t-log&quot;?\n\n`+
+		`data-confirm="Delete target &quot;t-log&quot;?&#10;&#10;`+
 			`Nothing more is delivered to it. `+
-			`Its past deliveries stay in the event log.`)
+			`Its past deliveries stay in the event log."`)
 }
 
 // TestHandleSourceDetail_DeletePromptKeepsQuotesInName checks that a
 // webhook name with quotes, a backslash, a closing script tag and a
-// newline reaches its delete prompt escaped for the script, which the
+// newline reaches its delete prompt escaped for the attribute, which
-// browser reads back as the name typed: each quote and angle bracket
+// the browser reads back as the name typed: each quote and angle
-// as a \u escape, the slash as \/, the newline as \n and the backslash
+// bracket as a character reference, the rest as typed. An unescaped
-// doubled. An unescaped newline would break the prompt's script, and
+// double quote would end the attribute and cut the prompt short.
-// the form would then submit without asking.
 func TestHandleSourceDetail_DeletePromptKeepsQuotesInName(t *testing.T) {
 	t.Parallel()
 
@@ -373,6 +372,6 @@ func TestHandleSourceDetail_DeletePromptKeepsQuotesInName(t *testing.T) {
 	body := renderSourceDetailPage(t, h, sess, wh.ID)
 
 	assert.Contains(t, body,
-		"Delete webhook &quot;Bob\\u0027s \\u0022best\\u0022 \\\\ hook"+
+		"Delete webhook &quot;Bob&#39;s &#34;best&#34; \\ hook"+
-			"\\u003c\\/script\\u003e\\nline two&quot;?")
+			"&lt;/script&gt;\nline two&quot;?")
 }

internal/handlers/target_retries.go

@@ -49,13 +49,6 @@ var (
 // working retry configuration over a typo. A default answers a
 // question that was not asked; it never answers one that was asked
 // badly.
-//
-// A target stored with a count above the ceiling before this
-// validation existed keeps rendering and keeps delivering — nothing
-// clamps the row. Re-saving it from the edit form does have to bring
-// it into range, because the form submits the pre-filled value back
-// and accepting it would be the ceiling not applying to the edit
-// path. The 400 names the ceiling, so the fix is one field.
 func parseMaxRetries(raw string, fallback int) (int, error) {
 	raw = strings.TrimSpace(raw)
 	if raw == "" {

internal/handlers/webhook.go

@@ -10,7 +10,6 @@ import (
 	"gorm.io/gorm"
 	"sneak.berlin/go/webhooker/internal/database"
 	"sneak.berlin/go/webhooker/internal/delivery"
-	"sneak.berlin/go/webhooker/internal/logfield"
 	"sneak.berlin/go/webhooker/internal/middleware"
 )
 
@@ -49,14 +48,13 @@ func (h *Handlers) HandleWebhook() http.HandlerFunc {
 			return
 		}
 
-		// Logged only once the UUID is known to name a real
+		// Logged only once the lookup has found the entrypoint, so
-		// entrypoint. The UUID comes straight out of the path on
+		// an invented path writes no INFO line; a miss is logged at
-		// the one unauthenticated endpoint, so logging it before
+		// DEBUG. The entrypoint is named by its ID: the UUID is its
-		// the lookup let a client write an INFO line per invented
+		// credential and is never logged.
-		// path; the request itself is already in the access log
-		// and a miss is already logged at DEBUG.
 		h.log.Info("webhook request received",
-			"entrypoint_uuid", entrypointUUID,
+			"entrypoint_id", entrypoint.ID,
+			"webhook_id", entrypoint.WebhookID,
 			"method", r.Method,
 			"remoteIP", middleware.RemoteIP(r),
 			"clientIP", middleware.ClientIP(r),
@@ -133,17 +131,10 @@ func (h *Handlers) lookupEntrypoint(
 		"path = ?", entrypointUUID,
 	).First(&entrypoint)
 	if result.Error != nil {
-		// The receiver is unauthenticated and /h/{uuid}
+		// Not even an unknown UUID is logged. The receiver's log
-		// matches any single segment, so this value is entirely
+		// lines never carry the path segment, which is a credential
-		// client-chosen on exactly the branch where the lookup
+		// whenever it names an entrypoint.
-		// failed. DEBUG is off by default; the cap is what keeps
+		h.log.Debug("entrypoint not found")
-		// turning it on from restoring an unbounded write.
-		h.log.Debug(
-			"entrypoint not found",
-			"path", logfield.Truncate(
-				entrypointUUID, logfield.MaxBytes,
-			),
-		)
 		http.NotFound(w, r)
 
 		return entrypoint, false

internal/handlers/webhook_test.go

@@ -12,12 +12,15 @@ import (
 	"testing"
 
 	"github.com/go-chi/chi"
+	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"gorm.io/gorm/clause"
 	"sneak.berlin/go/webhooker/internal/config"
 	"sneak.berlin/go/webhooker/internal/database"
 	"sneak.berlin/go/webhooker/internal/handlers"
 	"sneak.berlin/go/webhooker/internal/middleware"
+	"sneak.berlin/go/webhooker/internal/middleware/middlewaretest"
 )
 
 // TestHandleWebhook_LogsClientNextToThePeer checks that the
@@ -99,6 +102,87 @@ func TestHandleWebhook_LogsClientNextToThePeer(t *testing.T) {
 	}
 }
 
+// TestHandleWebhook_LogsNoEntrypointUUID sends an accepted event, a
+// request over the receiver rate limit and a request for an unknown
+// UUID through the receiver as routes.go mounts it, and checks that
+// nothing logged, at any level, carries either UUID.
+func TestHandleWebhook_LogsNoEntrypointUUID(t *testing.T) {
+	t.Parallel()
+
+	var (
+		h  *handlers.Handlers
+		db *database.Database
+	)
+
+	cfg := &config.Config{DataDir: t.TempDir(), ReceiverRateLimit: 1}
+
+	app := newTestAppWithConfig(t, cfg, &h, &db)
+	app.RequireStart()
+
+	t.Cleanup(app.RequireStop)
+
+	buf := new(bytes.Buffer)
+	log := slog.New(slog.NewJSONHandler(
+		buf, &slog.HandlerOptions{Level: slog.LevelDebug},
+	))
+	h.SetLogForTest(log)
+	mw := middlewaretest.New(t, log, cfg, nil)
+
+	webhook := seedWebhook(t, db)
+	entrypoint := &database.Entrypoint{
+		WebhookID: webhook.ID,
+		Path:      uuid.New().String(),
+		Active:    true,
+	}
+	require.NoError(t, db.DB().Omit(clause.Associations).
+		Create(entrypoint).Error)
+
+	unknownUUID := uuid.New().String()
+
+	router := chi.NewRouter()
+	router.Use(mw.Logging())
+	router.With(mw.ReceiverRateLimit()).HandleFunc(
+		middleware.ReceiverRoute, h.HandleWebhook(),
+	)
+
+	// In order: the limit is one request per minute per path, so the
+	// second request for the known UUID is the rejected one.
+	for _, step := range []struct {
+		entrypointUUID string
+		wantStatus     int
+	}{
+		{entrypoint.Path, http.StatusOK},
+		{entrypoint.Path, http.StatusTooManyRequests},
+		{unknownUUID, http.StatusNotFound},
+	} {
+		req := httptest.NewRequestWithContext(
+			context.Background(), http.MethodPost,
+			"/h/"+step.entrypointUUID, strings.NewReader("{}"),
+		)
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, req)
+
+		require.Equal(t, step.wantStatus, w.Code)
+	}
+
+	// The lines this test is about were all written, so the checks
+	// below are not passing on an empty log.
+	for _, msg := range []string{
+		"webhook request received",
+		"webhook receiver rate limit exceeded",
+		"entrypoint not found",
+	} {
+		assert.Contains(t, buf.String(), `"msg":"`+msg+`"`)
+	}
+
+	assert.NotContains(t, buf.String(), entrypoint.Path)
+	assert.NotContains(t, buf.String(), unknownUUID)
+
+	line := receivedLine(t, buf)
+	assert.Equal(t, entrypoint.ID, line["entrypoint_id"])
+	assert.Equal(t, webhook.ID, line["webhook_id"])
+}
+
 // receivedLine returns the one "webhook request received" line in the
 // captured JSON log.
 func receivedLine(t *testing.T, buf *bytes.Buffer) map[string]any {

internal/middleware/accesslog_test.go

@@ -7,6 +7,7 @@ import (
 	"log/slog"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"strings"
 	"testing"
 
@@ -27,6 +28,13 @@ const floodRequests = 64
 // line for a redirected or rejected request may contain it.
 const attackerMarker = "QQATTACKERTEXTQQ"
 
+// knownEntrypointUUID and failingEntrypointUUID are the UUIDs the
+// stand-in receiver in accessLogRouter answers 200 and 500 to.
+const (
+	knownEntrypointUUID   = "6f1e2a9c-4b7d-4e3a-9c2f-1d8b5a7e3c60"
+	failingEntrypointUUID = "0b7c3e5a-2d9f-4a61-8e4b-7c1d6f2a9e35"
+)
+
 // maxLineBytes bounds a single access log line whose client-supplied
 // fields are of ordinary size. Well above what the fixed fields need,
 // well below the length of the oversized input the amplification tests
@@ -132,17 +140,21 @@ func accessLogRouter(m *middleware.Middleware) *chi.Mux {
 	)
 
 	router.HandleFunc(
-		"/h/{uuid}",
+		middleware.ReceiverRoute,
 		func(w http.ResponseWriter, r *http.Request) {
-			// Stands in for the real handler: an unknown entrypoint
+			// Stands in for the real handler: a known entrypoint
-			// UUID 404s, a known one succeeds.
+			// UUID succeeds, a failing one is a server error, and
-			if chi.URLParam(r, "uuid") != "known" {
+			// any other 404s.
-				http.Error(w, "not found", http.StatusNotFound)
+			switch chi.URLParam(r, "uuid") {
-
+			case knownEntrypointUUID:
-				return
-			}
-
 				w.WriteHeader(http.StatusOK)
+			case failingEntrypointUUID:
+				http.Error(
+					w, "boom", http.StatusInternalServerError,
+				)
+			default:
+				http.Error(w, "not found", http.StatusNotFound)
+			}
 		},
 	)
 
@@ -335,11 +347,13 @@ func oversizedValue(ch string) string {
 }
 
 // oversizedHeaders fills every client-supplied header the access log
-// reads with the same value.
+// reads with the same value. The Referer carries it as the host of an
+// absolute URL, because the access log keeps only a Referer's scheme
+// and host.
 func oversizedHeaders(value string) map[string]string {
 	return map[string]string{
 		"User-Agent":   value,
-		"Referer":      value,
+		"Referer":      "http://" + value,
 		"X-Request-Id": value,
 	}
 }
@@ -649,17 +663,111 @@ func TestAccessLog_SuccessKeepsConcretePathAndRedactsQuery(
 	router := accessLogRouter(m)
 
 	assert.Equal(
-		t, http.StatusOK, get(t, router, "/h/known?src=ci"),
+		t, http.StatusOK,
+		get(t, router, "/.well-known/healthcheck?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, "/.well-known/healthcheck?(redacted)", entries[0]["url"],
+	)
 	assert.NotContains(t, buf.String(), "src=ci")
 }
 
+// TestAccessLog_ReceiverNeverLogsTheUUID covers the two statuses that
+// keep the concrete path on every other route. On the receiver that
+// path carries the entrypoint UUID, so the line names the route
+// pattern instead.
+func TestAccessLog_ReceiverNeverLogsTheUUID(t *testing.T) {
+	t.Parallel()
+
+	for entrypointUUID, wantStatus := range map[string]int{
+		knownEntrypointUUID:   http.StatusOK,
+		failingEntrypointUUID: http.StatusInternalServerError,
+	} {
+		t.Run(strconv.Itoa(wantStatus), func(t *testing.T) {
+			t.Parallel()
+
+			m, buf := capturingMiddleware(t)
+			router := accessLogRouter(m)
+
+			assert.Equal(
+				t, wantStatus,
+				get(t, router, "/h/"+entrypointUUID+"?src=ci"),
+			)
+
+			entries := accessLogEntries(t, buf)
+			require.Len(t, entries, 1)
+			assert.Equal(t, middleware.ReceiverRoute, entries[0]["url"])
+			assert.NotContains(t, buf.String(), entrypointUUID)
+		})
+	}
+}
+
+// TestAccessLog_ReceiverPreflightNeverLogsTheUUID sends a CORS
+// preflight to the receiver in dev, in the production middleware
+// order. CORS answers it with 200 before chi routes it, so the line
+// names no route and carries no UUID.
+func TestAccessLog_ReceiverPreflightNeverLogsTheUUID(t *testing.T) {
+	t.Parallel()
+
+	m, buf := capturingMiddleware(t)
+
+	router := chi.NewRouter()
+	router.Use(m.Logging())
+	router.Use(m.CORS())
+	router.HandleFunc(
+		middleware.ReceiverRoute,
+		func(w http.ResponseWriter, _ *http.Request) {
+			w.WriteHeader(http.StatusOK)
+		},
+	)
+
+	req := httptest.NewRequestWithContext(
+		context.Background(), http.MethodOptions,
+		"/h/"+knownEntrypointUUID, nil,
+	)
+	req.Header.Set("Origin", "https://sender.example")
+	req.Header.Set("Access-Control-Request-Method", http.MethodPost)
+
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	assert.Equal(t, http.StatusOK, w.Code)
+
+	entries := accessLogEntries(t, buf)
+	require.Len(t, entries, 1)
+	assert.Equal(t, unmatchedRouteLiteral, entries[0]["url"])
+	assert.NotContains(t, buf.String(), knownEntrypointUUID)
+}
+
+// TestAccessLog_RefererNeverLogsTheUUID sends receiver requests whose
+// Referer is the entrypoint URL, as a sender's is after it follows a
+// redirect from http:// to https://. The referer field keeps only the
+// scheme and host, and a Referer without them is logged as a marker.
+func TestAccessLog_RefererNeverLogsTheUUID(t *testing.T) {
+	t.Parallel()
+
+	m, buf := capturingMiddleware(t)
+	router := accessLogRouter(m)
+
+	for _, referer := range []string{
+		"http://webhooker.example/h/" + knownEntrypointUUID + "?src=ci",
+		"/h/" + knownEntrypointUUID,
+	} {
+		assert.Equal(t, http.StatusOK, getWithHeaders(
+			t, router, "/h/"+knownEntrypointUUID,
+			map[string]string{"Referer": referer},
+		))
+	}
+
+	entries := accessLogEntries(t, buf)
+	require.Len(t, entries, 2)
+	assert.Equal(t, "http://webhooker.example", entries[0]["referer"])
+	assert.Equal(t, "(redacted)", entries[1]["referer"])
+	assert.NotContains(t, buf.String(), knownEntrypointUUID)
+}
+
 func TestAccessLog_ServerErrorKeepsConcreteURL(t *testing.T) {
 	t.Parallel()
 

internal/middleware/logbound_test.go

@@ -10,8 +10,10 @@ package middleware_test
 //     the client's choosing.
 //   - CSRF's 403 rejection, at WARN, also registered ahead of
 //     RequireAuth.
-//   - The rate limiters' 429 rejection, at WARN, on the
+//   - The rate limiters' 429 rejection, at WARN. On the receiver
-//     unauthenticated receiver among others.
+//     route it names the route pattern rather than the path, and
+//     the limiters that log a path sit behind RequireAuth, so its cap
+//     is defensive.
 //   - RequireAuth's own unauthenticated-request line, at DEBUG.
 //   - RecordLoginFailure's throttle rejection, at WARN. Its cap is
 //     defensive rather than load-bearing today: chi pins the one
@@ -268,10 +270,14 @@ func logSites() map[string]logSite {
 			send:       postNoToken,
 			wantStatus: http.StatusForbidden,
 		},
-		// The per-entrypoint receiver limiter, unauthenticated. Its
+		// The 429 line every limiter but the aggregate one shares.
-		// bucket is keyed on the path, so the first request through a
+		// Mounted outside any route, as here, it logs the path, as
-		// fresh path is served and only the ones after it are
+		// it does for the limiters behind RequireAuth; on
-		// rejected; sendUntilLimited absorbs that.
+		// ReceiverRoute it names the pattern instead. The
+		// per-entrypoint receiver limiter's bucket is keyed on the
+		// path, so the first request through a fresh path is served
+		// and only the ones after it are rejected; sendUntilLimited
+		// absorbs that.
 		"receiver rate limit 429": {
 			build: func(
 				t *testing.T, m *middleware.Middleware,

internal/middleware/metrics.go

@@ -41,7 +41,8 @@ const unmatchedMethod = unmatchedRoute
 // after /h/ 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.
+// while doing it. The access log and the 429 line read it for the
+// same reason: see ReceiverRoute.
 //
 // chi populates the route context during routeHTTP, so this is only
 // valid once routing has run. Every caller below is on the recording

internal/middleware/middleware.go

@@ -13,7 +13,6 @@ import (
 	"time"
 
 	basicauth "github.com/99designs/basicauth-go"
-	"github.com/go-chi/chi"
 	"github.com/go-chi/chi/middleware"
 	"github.com/go-chi/cors"
 	"github.com/prometheus/client_golang/prometheus"
@@ -23,6 +22,7 @@ import (
 	"sneak.berlin/go/webhooker/internal/config"
 	"sneak.berlin/go/webhooker/internal/globals"
 	"sneak.berlin/go/webhooker/internal/logfield"
+	"sneak.berlin/go/webhooker/internal/referer"
 	"sneak.berlin/go/webhooker/internal/session"
 )
 
@@ -96,14 +96,14 @@ const (
 	// It is also the ceiling on every OTHER line this service writes
 	// THROUGH SLOG that carries text an UNAUTHENTICATED client
 	// supplies. Those lines — the MaxBodySize rejection, the CSRF
-	// rejection, the rate-limit rejection, the unauthenticated-request
+	// rejection, the unauthenticated-request DEBUG line, the
-	// and unknown-entrypoint DEBUG lines, the failed-login DEBUG
+	// failed-login DEBUG lines, and the two login-throttle WARN
-	// lines, and the two login-throttle WARN lines ("login failure
+	// lines ("login failure limit exceeded" in loginguard.go and
-	// limit exceeded" in loginguard.go and "password verification
+	// "password verification capacity exhausted" in
-	// capacity exhausted" in internal/handlers/auth.go) — spend the
+	// internal/handlers/auth.go) — spend the same per-field budgets,
-	// same per-field budgets, and each carries strictly fewer
+	// and each carries strictly fewer client-supplied fields than the
-	// client-supplied fields than the access log does,
+	// access log does, so none of them can reach a width the access
-	// so none of them can reach a width the access log cannot. That is
+	// log cannot. That is
 	// asserted directly, per line and under both handlers, rather than
 	// left to the reasoning: see logbound_test.go in this package and
 	// in internal/handlers.
@@ -115,16 +115,15 @@ const (
 	// a caller on a parameterised route would supply, which is the
 	// only way those caps can be pinned at all.
 	//
-	// One writer in that set is not a handler's own slog call. The
+	// The GORM adapter in internal/gormlog writes through slog as well.
-	// GORM adapter in internal/gormlog logs the statement with the
+	// It logs each statement with its placeholders rather than the
-	// client-chosen parameter already interpolated into it, which on
+	// values bound to them (see its ParamsFilter), so the key a client
-	// the receiver and login lookups is exactly the value the budgets
+	// sends to the receiver or login lookup does not reach its lines.
-	// above exist for. Its widest line spends two logfield.MaxBytes
+	// Its widest line spends two logfield.MaxBytes budgets — the
-	// budgets — the statement and the driver error — against a fixed
+	// statement and the driver error — against a fixed portion smaller
-	// portion smaller than this one's, and
+	// than this one's, and internal/gormlog/gormlog_test.go asserts
-	// internal/gormlog/gormlog_test.go asserts every line it emits
+	// every line it emits against this constant directly rather than
-	// against this constant directly rather than leaving it as
+	// leaving it as arithmetic.
-	// arithmetic.
 	//
 	// What it does NOT cover, so that the figure above is not read as
 	// more than it is:
@@ -151,6 +150,12 @@ const (
 	MaxAccessLogLineBytes = 2560
 )
 
+// ReceiverRoute is the route pattern the webhook receiver is served
+// at. Its path carries the entrypoint UUID, which is the receiver's
+// only credential, so the log lines this package writes name a
+// request on this route by the pattern, never by its path.
+const ReceiverRoute = "/h/{uuid}"
+
 //nolint:revive // MiddlewareParams is a standard fx naming convention.
 type MiddlewareParams struct {
 	fx.In
@@ -268,14 +273,14 @@ func (lrw *loggingResponseWriter) Unwrap() http.ResponseWriter {
 // marker.
 //
 // The path on those branches is bounded by the service's routes or by
-// the operator's data — a 2xx on the receiver means the UUID named a
+// the operator's data — a 2xx under /s means the file is in the
-// stored entrypoint, a 2xx under /s means the file is in the embedded
+// embedded tree. The query is not bounded by anything:
-// tree. The query is not bounded by anything: /.well-known/healthcheck
+// /.well-known/healthcheck and /s/* take no authentication and sit
-// and /s/* take no authentication and sit behind no rate limiter, and
+// behind no rate limiter, and /pages/login behind only the login
-// /pages/login behind only the login limiter, so any of them will
+// limiter, so any of them will answer 200 to a URL carrying an
-// answer 200 to a URL carrying an arbitrary number of arbitrary bytes
+// arbitrary number of arbitrary bytes after the '?'. Keeping the path
-// after the '?'. Keeping the path and dropping the query is what makes
+// and dropping the query is what makes this branch as bounded as the
-// this branch as bounded as the pattern branches below.
+// pattern branches below.
 //
 // Nothing debuggable is lost. The only query parameters the service
 // reads are the login page's `next`, the page to return to,
@@ -297,36 +302,40 @@ func concreteLogURL(r *http.Request) string {
 
 // accessLogURL returns the value for the access log's url field.
 //
-// 2xx and 5xx responses get the concrete path (see concreteLogURL). A
+// On ReceiverRoute it is the route pattern whatever the status, so
-// success resolved against a static route or against the operator's
+// the entrypoint UUID in the path is never logged. A request chi never
-// own data — on the receiver, a 2xx means the UUID named a stored
+// routed gets unmatchedRoute whatever the status, for the same reason:
-// entrypoint — and a server error is our own bug, where the exact URL
+// in dev, CORS answers a preflight to the receiver before routing.
-// is the primary evidence and which no client can provoke at will.
+//
+// On every other route, 2xx and 5xx responses get the concrete path
+// (see concreteLogURL). A success resolved against a static route or
+// against the operator's own data, and a server error is our own bug,
+// where the exact URL is the primary evidence and which no client can
+// provoke at will.
 //
 // 3xx and 4xx responses get the chi route pattern instead. Those are
-// the outcomes an unauthenticated client drives for free: 404 or 429
+// the outcomes an unauthenticated client drives for free, such as a
-// on any invented /h/ path, 303 to the login page on any
+// 303 to the login page on any invented /user/ path. Logging the
-// invented /user/ path. Logging the concrete URL there lets a flood
+// concrete URL there lets a flood write attacker-chosen text, of
-// write attacker-chosen text, of attacker-chosen length, into the
+// attacker-chosen length, into the operator's log at one line per
-// operator's log at one line per request. The pattern comes from the
+// request. The pattern comes from the router's own table, so it is
-// router's own table, so it is bounded by the service's routes while
+// bounded by the service's routes while still naming which class of
-// still naming which class of request was rejected.
+// request was rejected.
 //
 // The pattern is only populated once routing has run, so this must be
 // called after the handler returns, not before.
 func accessLogURL(r *http.Request, status int) string {
+	pattern := routePatternID(r.Context())
+	if pattern == ReceiverRoute || pattern == unmatchedRoute {
+		return pattern
+	}
+
 	if status < http.StatusMultipleChoices ||
 		status >= http.StatusInternalServerError {
 		return concreteLogURL(r)
 	}
 
-	if rc := chi.RouteContext(r.Context()); rc != nil {
-		if pattern := rc.RoutePattern(); pattern != "" {
 	return pattern
-		}
-	}
-
-	return unmatchedRoute
 }
 
 // Logging returns middleware that logs each HTTP request with
@@ -379,7 +388,8 @@ func (s *Middleware) Logging() func(http.Handler) http.Handler {
 						requestID, maxLogRequestIDBytes,
 					),
 					"referer", logfield.Truncate(
-						r.Referer(), logfield.MaxBytes,
+						referer.SchemeAndHost(r.Referer()),
+						logfield.MaxBytes,
 					),
 					"proto", r.Proto,
 					"remoteIP", RemoteIP(r),
@@ -538,7 +548,9 @@ func (s *Middleware) MetricsAuth() func(http.Handler) http.Handler {
 // SecurityHeaders returns middleware that sets production security
 // headers on every response: HSTS (unless HSTS_MAX_AGE is zero),
 // X-Content-Type-Options, X-Frame-Options, CSP, Referrer-Policy, and
-// Permissions-Policy.
+// Permissions-Policy. The CSP takes scripts and styles only from
+// files on this origin, so a template may hold no inline script,
+// event handler or style attribute.
 func (s *Middleware) SecurityHeaders() func(http.Handler) http.Handler {
 	maxAge := s.params.Config.HSTSMaxAge
 	hsts := "max-age=" + strconv.FormatInt(int64(maxAge/time.Second), 10) +
@@ -560,8 +572,8 @@ func (s *Middleware) SecurityHeaders() func(http.Handler) http.Handler {
 			w.Header().Set(
 				"Content-Security-Policy",
 				"default-src 'self'; "+
-					"script-src 'self' 'unsafe-inline'; "+
+					"script-src 'self'; "+
-					"style-src 'self' 'unsafe-inline'",
+					"style-src 'self'",
 			)
 			w.Header().Set(
 				"Referrer-Policy",

internal/middleware/middleware_test.go

@@ -747,10 +747,10 @@ func TestNoCache_SetsHeaders(t *testing.T) {
 
 // --- SecurityHeaders Middleware Tests ---
 
-// hstsHeaders serves one request through SecurityHeaders built over
+// securityHeaders serves one request through SecurityHeaders built
-// a Config with the given HSTSMaxAge, and returns every
+// over a Config with the given HSTSMaxAge, and returns the response's
-// Strict-Transport-Security value on the response.
+// headers.
-func hstsHeaders(t *testing.T, maxAge time.Duration) []string {
+func securityHeaders(t *testing.T, maxAge time.Duration) http.Header {
 	t.Helper()
 
 	cfg := &config.Config{HSTSMaxAge: maxAge}
@@ -772,7 +772,7 @@ func hstsHeaders(t *testing.T, maxAge time.Duration) []string {
 
 	handler.ServeHTTP(w, req)
 
-	return w.Header().Values("Strict-Transport-Security")
+	return w.Header()
 }
 
 func TestSecurityHeaders_HSTS(t *testing.T) {
@@ -804,11 +804,28 @@ func TestSecurityHeaders_HSTS(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
 
-			assert.Equal(t, tt.expected, hstsHeaders(t, tt.maxAge))
+			assert.Equal(
+				t, tt.expected,
+				securityHeaders(t, tt.maxAge).Values(
+					"Strict-Transport-Security",
+				),
+			)
 		})
 	}
 }
 
+// TestSecurityHeaders_CSP pins the Content-Security-Policy: a page
+// takes its scripts and styles only from files on its own origin,
+// never from an inline script, event handler or style.
+func TestSecurityHeaders_CSP(t *testing.T) {
+	t.Parallel()
+
+	assert.Equal(
+		t, "default-src 'self'; script-src 'self'; style-src 'self'",
+		securityHeaders(t, 0).Get("Content-Security-Policy"),
+	)
+}
+
 // --- MaxBodySize Middleware Tests ---
 
 const testBodyLimit int64 = 64

internal/middleware/ratelimit.go

@@ -259,26 +259,28 @@ func (m *Middleware) clientAddr(r *http.Request) (netip.Addr, bool) {
 	return peer, true
 }
 
-// tooManyRequests returns the 429 handler used by the
+// tooManyRequests returns the 429 handler used by the postRateLimit
-// password-change and per-entrypoint receiver limiters: it logs the
+// limiters and the per-entrypoint receiver limiter: it logs the
 // rejection with logMessage and answers with responseMessage.
 // httprate adds the Retry-After header (RFC 6585). The aggregate
 // receiver limiter uses floodTooManyRequests instead.
 //
-// The path is capped against the same budget as the access log's url
+// On ReceiverRoute the line names the route pattern, so the
-// field. The per-entrypoint receiver limiter is unauthenticated and
+// entrypoint UUID in the path is never logged. Elsewhere it names the
-// its path is a client-chosen segment of client-chosen length, so at
+// path, capped against the same budget as the access log's url field;
-// WARN an uncapped path would let a sender pick the size of the line
+// the limiters there sit behind RequireAuth, so the cap is defensive.
-// it writes — the same defect the access log capping closed.
 func (m *Middleware) tooManyRequests(
 	logMessage, responseMessage string,
 ) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		path := r.URL.Path
+		if routePatternID(r.Context()) == ReceiverRoute {
+			path = ReceiverRoute
+		}
+
 		m.log.Warn(
 			logMessage,
-			"path", logfield.Truncate(
+			"path", logfield.Truncate(path, logfield.MaxBytes),
-				r.URL.Path, logfield.MaxBytes,
-			),
 			"remoteIP", RemoteIP(r),
 			"clientIP", ClientIP(r),
 		)

internal/referer/referer.go

@@ -0,0 +1,32 @@
+// Package referer reduces a Referer header to its scheme and host, so
+// that a URL path, which on the receiver route carries the entrypoint
+// UUID, never reaches a log line or an error report.
+package referer
+
+import "net/url"
+
+// redacted stands in for a Referer that cannot be reduced to its
+// scheme and host.
+const redacted = "(redacted)"
+
+// SchemeAndHost returns a Referer's scheme and host, never its path or
+// query. The path can be an entrypoint URL, which carries the UUID: a
+// sender that follows a redirect from http:// to https:// sends the
+// URL it was redirected from, and a browser sends the 404 page's URL
+// under /h/ when it fetches that page's stylesheet. A Referer without
+// both a scheme and a host comes back as "(redacted)".
+//
+// It is the access log's referer field, and the Referer header the
+// Sentry hook sends.
+func SchemeAndHost(referer string) string {
+	if referer == "" {
+		return ""
+	}
+
+	parsed, err := url.Parse(referer)
+	if err != nil || parsed.Scheme == "" || parsed.Host == "" {
+		return redacted
+	}
+
+	return parsed.Scheme + "://" + parsed.Host
+}

internal/referer/referer_test.go

@@ -0,0 +1,67 @@
+package referer_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sneak.berlin/go/webhooker/internal/referer"
+)
+
+// entrypointUUID is the secret part of an entrypoint URL; no case may
+// return it.
+const entrypointUUID = "0b6f7d3e-6a39-4e3c-9f0a-2c4d8e1b5a77"
+
+// redacted is what SchemeAndHost returns for a Referer it cannot
+// reduce to a scheme and host.
+const redacted = "(redacted)"
+
+func TestSchemeAndHost(t *testing.T) {
+	t.Parallel()
+
+	for _, tc := range []struct {
+		name    string
+		referer string
+		want    string
+	}{
+		{
+			name:    "no Referer",
+			referer: "",
+			want:    "",
+		},
+		{
+			name: "entrypoint URL with a query",
+			referer: "http://webhooker.example/h/" + entrypointUUID +
+				"?src=ci",
+			want: "http://webhooker.example",
+		},
+		{
+			name:    "host with a port",
+			referer: "https://webhooker.example:8443/h/" + entrypointUUID,
+			want:    "https://webhooker.example:8443",
+		},
+		{
+			name:    "path without a scheme or host",
+			referer: "/h/" + entrypointUUID,
+			want:    redacted,
+		},
+		{
+			name:    "host without a scheme",
+			referer: "webhooker.example/h/" + entrypointUUID,
+			want:    redacted,
+		},
+		{
+			name:    "not a URL",
+			referer: "http://[::1/h/" + entrypointUUID,
+			want:    redacted,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			got := referer.SchemeAndHost(tc.referer)
+
+			assert.Equal(t, tc.want, got)
+			assert.NotContains(t, got, entrypointUUID)
+		})
+	}
+}

internal/server/alpine_browser_test.go

@@ -60,8 +60,8 @@ const (
 // TestAlpineRunsUnderTheSecurityPolicy loads the webhook page and the
 // event log in a headless browser, served by the real router and so
 // under the real Content-Security-Policy, and checks that the pages'
-// Alpine.js directives and the copy control work, and that a target's
+// Alpine.js directives, the copy control and the delete prompts work,
-// row shows its delivery counts.
+// and that a target's row shows its delivery counts.
 func TestAlpineRunsUnderTheSecurityPolicy(t *testing.T) {
 	t.Parallel()
 
@@ -74,6 +74,10 @@ func TestAlpineRunsUnderTheSecurityPolicy(t *testing.T) {
 	userID, _ := env.seedUser(t, "browser", "browser-password")
 	webhook, older, event, target := seedBrowserWebhook(t, env, userID)
 
+	// The sign-in page is loaded before the browser signs in, since a
+	// signed-in visit to it is sent on to another page.
+	checkOtherPages(ctx, t, srv.URL+"/pages/login")
+
 	require.NoError(t, chromedp.Run(
 		ctx, setCookies(srv.URL, env.authCookies(t, userID, "browser")),
 	))
@@ -99,6 +103,11 @@ func TestAlpineRunsUnderTheSecurityPolicy(t *testing.T) {
 	checkEventLog(ctx, t, page+"/events", event.ID, older.ID, target.Name)
 	checkMobileMenu(ctx, t, page)
 	checkPhoneWidth(ctx, t, page, page+"/events", target.Name)
+	checkOtherPages(ctx, t,
+		srv.URL+"/hooks", srv.URL+"/settings", srv.URL+"/user/browser",
+		// A path that does not exist, which gets the 404 error page.
+		srv.URL+"/no-such-page")
+	checkDeletePrompt(ctx, t, page, target)
 
 	assert.Empty(t, problems(), "the browser reported problems")
 }
@@ -1388,3 +1397,75 @@ func checkPhoneWidth(
 	assert.False(t, sideways, "the event log scrolls sideways on a phone")
 	assert.Empty(t, cutOff, "the event log cuts these off on a phone")
 }
+
+// checkOtherPages loads the pages at urls, which no other check opens,
+// so that anything the browser reports going wrong on them fails the
+// test too.
+func checkOtherPages(ctx context.Context, t *testing.T, urls ...string) {
+	t.Helper()
+
+	for _, url := range urls {
+		require.NoError(t, chromedp.Run(ctx, loadPage(url)))
+	}
+}
+
+// answerPrompt returns a script that stands in for the user at the
+// browser's prompt: it makes window.confirm record the question in
+// window.asked and give answer. It also records in window.sent whether
+// a form is sent once its submit event is handled, from a listener on
+// window, which the event reaches after the listener static/js/app.js
+// adds to document.
+func answerPrompt(answer bool) string {
+	return fmt.Sprintf(`
+		window.asked = "";
+		window.sent = false;
+		window.confirm = (question) => {
+			window.asked = question;
+			return %t;
+		};
+		window.addEventListener("submit", (event) => {
+			window.sent = !event.defaultPrevented;
+		});`, answer)
+}
+
+// checkDeletePrompt loads a webhook page and clicks Delete beside
+// target. It checks that the browser asks first, naming the target,
+// that answering no leaves the form unsent, and that answering yes
+// sends it and the target is deleted.
+func checkDeletePrompt(
+	ctx context.Context, t *testing.T, url string, target *database.Target,
+) {
+	t.Helper()
+
+	form := `form[action$="/targets/` + target.ID + `/delete"]`
+	question := `Delete target "` + target.Name + `"?` + "\n\n" +
+		"Nothing more is delivered to it. " +
+		"Its past deliveries stay in the event log."
+
+	var (
+		asked  string
+		sent   bool
+		listed bool
+	)
+
+	require.NoError(t, chromedp.Run(
+		ctx, loadPage(url), chromedp.Evaluate(answerPrompt(false), nil),
+	))
+	click(ctx, t, form+" button")
+	require.NoError(t, chromedp.Run(
+		ctx,
+		chromedp.Evaluate(`window.asked`, &asked),
+		chromedp.Evaluate(`window.sent`, &sent),
+	))
+	assert.Equal(t, question, asked, "Delete does not ask about the target")
+	assert.False(t, sent, "answering no still sends the delete form")
+
+	require.NoError(t, chromedp.Run(
+		ctx, chromedp.Evaluate(answerPrompt(true), nil),
+	))
+	clickAndLoad(ctx, t, form+" button")
+	require.NoError(t, chromedp.Run(ctx, chromedp.Evaluate(
+		`document.querySelector('`+form+`') !== null`, &listed,
+	)))
+	assert.False(t, listed, "answering yes does not delete the target")
+}

internal/server/bind_address_test.go

@@ -5,6 +5,7 @@ import (
 	"net"
 	"net/http"
 	"strconv"
+	"syscall"
 	"testing"
 	"time"
 
@@ -25,6 +26,11 @@ const (
 	// its network namespace even with a published port.
 	wildcardV4 = "0.0.0.0"
 
+	// loopbackV6 and wildcardV6 are the IPv6 counterparts of the two
+	// above.
+	loopbackV6 = "::1"
+	wildcardV6 = "::"
+
 	// unavailableAddr is a TEST-NET-1 address (RFC 5737). It is a
 	// well-formed literal that no host is assigned, so binding it
 	// fails with EADDRNOTAVAIL rather than succeeding somewhere
@@ -116,6 +122,24 @@ func otherLocalAddr(t *testing.T) string {
 	return ""
 }
 
+// skipWithoutIPv6 skips the test when this host cannot bind
+// loopbackV6. Without IPv6 there is no second family for a bind to
+// claim or leave alone.
+func skipWithoutIPv6(t *testing.T) {
+	t.Helper()
+
+	var listenCfg net.ListenConfig
+
+	l, err := listenCfg.Listen(
+		t.Context(), "tcp6", net.JoinHostPort(loopbackV6, "0"),
+	)
+	if err != nil {
+		t.Skip("host has no IPv6 loopback to bind")
+	}
+
+	require.NoError(t, l.Close())
+}
+
 // startBoundServer starts the wired app with the given bind address
 // on a free port and returns that port. The app is stopped on
 // cleanup.
@@ -292,6 +316,59 @@ func TestBindAddress_WildcardReachesOtherAddresses(t *testing.T) {
 	requireDialable(t, net.JoinHostPort(other, strconv.Itoa(port)))
 }
 
+// TestBindAddress_WildcardV4IsIPv4Only pins that 0.0.0.0 answers on
+// IPv4 alone, as the README says, whether it is written as 0.0.0.0 or
+// as the IPv4-mapped ::ffff:0.0.0.0. Go listens on 0.0.0.0 with a
+// socket that answers IPv6 too unless told otherwise, which put the
+// admin UI and the receiver on every IPv6 address of a host whose
+// operator had chosen an IPv4 bind.
+func TestBindAddress_WildcardV4IsIPv4Only(t *testing.T) {
+	t.Parallel()
+
+	skipWithoutIPv6(t)
+
+	for _, bindAddress := range []string{wildcardV4, "::ffff:0.0.0.0"} {
+		t.Run(bindAddress, func(t *testing.T) {
+			t.Parallel()
+
+			port := startBoundServer(t, bindAddress)
+
+			// Positive control: the service really is up, on IPv4.
+			requireDialable(
+				t, net.JoinHostPort(loopbackV4, strconv.Itoa(port)),
+			)
+
+			dialer := net.Dialer{Timeout: dialTimeout}
+
+			conn, err := dialer.DialContext(
+				t.Context(), "tcp",
+				net.JoinHostPort(loopbackV6, strconv.Itoa(port)),
+			)
+			if err == nil {
+				_ = conn.Close()
+			}
+
+			require.ErrorIs(
+				t, err, syscall.ECONNREFUSED,
+				"a %s bind answered on %s", bindAddress, loopbackV6,
+			)
+		})
+	}
+}
+
+// TestBindAddress_WildcardV6ReachesBothFamilies is the counterpart:
+// :: is the value that binds IPv6, and it answers IPv4 as well.
+func TestBindAddress_WildcardV6ReachesBothFamilies(t *testing.T) {
+	t.Parallel()
+
+	skipWithoutIPv6(t)
+
+	port := startBoundServer(t, wildcardV6)
+
+	requireDialable(t, net.JoinHostPort(loopbackV6, strconv.Itoa(port)))
+	requireDialable(t, net.JoinHostPort(loopbackV4, strconv.Itoa(port)))
+}
+
 // TestBindAddress_ServesRequestsOnConfiguredAddress proves the bound
 // listener serves the application rather than merely accepting TCP,
 // so a bind address that is honoured cannot be mistaken for one that

internal/server/http.go

@@ -1,9 +1,11 @@
 package server
 
 import (
+	"context"
 	"errors"
 	"net"
 	"net/http"
+	"net/netip"
 	"strconv"
 	"time"
 )
@@ -39,6 +41,23 @@ func (s *Server) listenAddr() string {
 	)
 }
 
+// listenNetwork returns the network the HTTP listener binds on, "tcp4"
+// for an IPv4 BindAddress and "tcp" for any other.
+//
+// On "tcp", Go binds 0.0.0.0 with a socket that answers IPv6 as well,
+// exactly as it binds ::. "tcp4" keeps 0.0.0.0 to IPv4, which is what
+// the README says it means. :: stays on "tcp" and answers both. An
+// IPv4-mapped address such as ::ffff:0.0.0.0 is the IPv4 address it
+// carries to Go's listener, so it gets "tcp4" too.
+func (s *Server) listenNetwork() string {
+	addr, err := netip.ParseAddr(s.params.Config.BindAddress)
+	if err == nil && addr.Unmap().Is4() {
+		return "tcp4"
+	}
+
+	return "tcp"
+}
+
 // newHTTPServer builds the HTTP server for this Server's
 // configuration.
 //
@@ -67,7 +86,17 @@ func (s *Server) serveUntilShutdown() {
 
 	s.log.Info("http begin listen", "listenaddr", s.httpServer.Addr)
 
-	err := s.httpServer.ListenAndServe()
+	// ListenAndServe always listens on "tcp", which would undo
+	// listenNetwork.
+	var listenCfg net.ListenConfig
+
+	listener, err := listenCfg.Listen(
+		context.Background(), s.listenNetwork(), s.httpServer.Addr,
+	)
+	if err == nil {
+		err = s.httpServer.Serve(listener)
+	}
+
 	if err != nil && !errors.Is(err, http.ErrServerClosed) {
 		s.log.Error("listen error", "error", err)
 		s.shutdownWithFailure()

internal/server/routes.go

@@ -6,7 +6,8 @@ import (
 
 	sentryhttp "github.com/getsentry/sentry-go/http"
 	"github.com/go-chi/chi"
-	"github.com/go-chi/chi/middleware"
+	chimw "github.com/go-chi/chi/middleware"
+	"sneak.berlin/go/webhooker/internal/middleware"
 	"sneak.berlin/go/webhooker/static"
 )
 
@@ -60,7 +61,7 @@ func (s *Server) SetupRoutes() {
 }
 
 func (s *Server) setupGlobalMiddleware() {
-	s.router.Use(middleware.RequestID)
+	s.router.Use(chimw.RequestID)
 	s.router.Use(s.mw.SecurityHeaders())
 	s.router.Use(s.mw.Logging())
 
@@ -345,7 +346,7 @@ func (s *Server) setupWebhookRoutes() {
 	// unauthenticated endpoint's body; TestReceiver_OversizeBodyRefused
 	// pins it.
 	s.router.With(s.mw.ReceiverRateLimit()).HandleFunc(
-		"/h/{uuid}",
+		middleware.ReceiverRoute,
 		s.h.HandleWebhook(),
 	)
 }

internal/server/sentry.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/getsentry/sentry-go"
 	"github.com/go-chi/chi"
+	"sneak.berlin/go/webhooker/internal/referer"
 )
 
 // sentryRedacted stands in for a withheld field on every event shipped
@@ -253,6 +254,7 @@ func sentryTransactionName(name, pattern string) string {
 // gorilla/csrf accepts in place of the form field — and the shared
 // secrets senders put on the receiver route (X-Gitlab-Token and the
 // per-provider signature headers) would otherwise ship verbatim.
+// The Referer it keeps is cut down to its scheme and host.
 func keptSentryHeaders(headers map[string]string) map[string]string {
 	if len(headers) == 0 {
 		return headers
@@ -261,9 +263,15 @@ func keptSentryHeaders(headers map[string]string) map[string]string {
 	kept := make(map[string]string, len(headers))
 
 	for name, value := range headers {
-		if sentryKeepsHeader(name) {
+		if !sentryKeepsHeader(name) {
-			kept[name] = value
+			continue
 		}
+
+		if http.CanonicalHeaderKey(name) == "Referer" {
+			value = referer.SchemeAndHost(value)
+		}
+
+		kept[name] = value
 	}
 
 	return kept
@@ -271,11 +279,14 @@ func keptSentryHeaders(headers map[string]string) map[string]string {
 
 // sentryKeepsHeader reports whether a request header is routing or
 // content metadata rather than client-chosen payload. Referer is kept
-// on the reasoning that it is browser-set, that the only query
+// only as its scheme and host, through referer.SchemeAndHost, which
-// parameters in this service's own URLs are the login page's `next`,
+// the access log uses too: its path can be an entrypoint URL, which
-// `notice` and the event log's `show`, and that Referrer-Policy is set to
+// carries the UUID, as when a sender follows a redirect from http://
-// strict-origin-when-cross-origin. X-Request-Id ties the event to the
+// to https:// or a browser fetches the 404 page's stylesheet from
-// local access log line, which holds the rest of the detail.
+// under /h/. The scheme and host are all gorilla/csrf compares a
+// Referer by, so a CSRF rejection is still readable from the event.
+// X-Request-Id ties the event to the local access log line, which
+// holds the rest of the detail.
 func sentryKeepsHeader(name string) bool {
 	switch http.CanonicalHeaderKey(name) {
 	case "Accept",

internal/server/sentry_test.go

@@ -325,6 +325,37 @@ func TestSentryScrub_ReplacesTheCapabilityPathWithTheRoutePattern(
 	)
 }
 
+// TestSentryScrub_KeepsOnlyTheRefererSchemeAndHost sends a receiver
+// request whose Referer is the entrypoint URL, as a sender's is after
+// it follows the README's redirect from http:// to https://. The event
+// keeps the Referer's scheme and host, and carries the UUID nowhere.
+func TestSentryScrub_KeepsOnlyTheRefererSchemeAndHost(t *testing.T) {
+	t.Parallel()
+
+	event := onlyEvent(t, sentryCase{
+		scrub:  true,
+		panics: true,
+		request: func(client *sentry.Client) *http.Request {
+			req := sentryReceiverRequest(client)
+			req.Header.Set(
+				"Referer",
+				"http://webhooker.example/h/"+sentryReceiverUUID,
+			)
+
+			return req
+		},
+	}.capture(t))
+
+	assert.NotContains(
+		t, marshalEvent(t, event), sentryReceiverUUID,
+	)
+	assert.Equal(
+		t,
+		"http://webhooker.example",
+		event.Request.Headers["Referer"],
+	)
+}
+
 // TestSentryScrub_KeepsTheRoutingContext checks the hook does not cost
 // the debugging signal: the route, its scheme and host, the method and
 // the metadata headers still identify what failed. On a static route

internal/server/server.go

@@ -135,6 +135,8 @@ func New(lc fx.Lifecycle, params ServerParams) (*Server, error) {
 	s.httpServer = s.newHTTPServer()
 
 	lc.Append(fx.Hook{
+		//nolint:contextcheck // The listener outlives this hook, whose
+		// context fx cancels once the app has started.
 		OnStart: func(_ context.Context) error {
 			s.startupTime = time.Now()
 			go s.Run()

internal/session/session.go

@@ -441,10 +441,9 @@ func (s *Session) Regenerate(
 //
 // Whichever comes first ends the session.
 //
-// A session that claims to be authenticated but carries no
+// A session that claims to be authenticated but lacks the timestamp
-// timestamps predates this check; it is treated as expired so the
+// a deadline is measured from is treated as expired, so the user
-// user re-authenticates rather than being granted an unbounded
+// re-authenticates rather than being granted an unbounded session.
-// session.
 func (s *Session) expired(sess *sessions.Session) bool {
 	now := s.now()
 

internal/versionscript/version_script_test.go

@@ -153,17 +153,15 @@ func TestVersion_IsStableAcrossInvocations(t *testing.T) {
 	require.Equal(t, first, second)
 }
 
-// The build target is the only place composing linker flags. If a
+// The build target is the only place that stamps the version. If a
-// future edit drops either half, the binary silently reports "dev"
+// future edit drops the -X flag, the binary silently reports "dev"
-// again (the defect this package exists for) or fails to link on
+// again, the defect this package exists for.
-// Alpine.
+func TestMakefile_BuildStampsTheVersion(t *testing.T) {
-func TestMakefile_BuildComposesVersionAndExtraFlags(t *testing.T) {
 	t.Parallel()
 
 	makefile := read(t, makefilePath)
 
 	require.Contains(t, makefile, "-X main.version=$(VERSION)")
-	require.Contains(t, makefile, "$(GO_LDFLAGS)")
 	require.Contains(t, makefile, "VERSION ?= $(shell script/version)")
 }
 
@@ -222,8 +220,8 @@ func requireMake(t *testing.T) {
 	}
 }
 
-// Every compile in the image goes through the build target, so the
+// The image compiles through the build target, so it carries the
-// static relink cannot replace the flags that carry the stamp.
+// target's version stamp.
 func TestDockerfile_BuildsThroughTheMakeTarget(t *testing.T) {
 	t.Parallel()
 
@@ -232,8 +230,7 @@ func TestDockerfile_BuildsThroughTheMakeTarget(t *testing.T) {
 	require.NotContains(t, dockerfile, "go build",
 		"a raw go build bypasses the Makefile's -X flag")
 	require.Contains(t, dockerfile, "ARG VERSION")
-	require.Contains(t, dockerfile,
+	require.Contains(t, dockerfile, `RUN make build VERSION="$VERSION"`)
-		`make build VERSION="$VERSION" GO_LDFLAGS='-extldflags "-static"'`)
 }
 
 func read(t *testing.T, path string) string {

static/css/style.css

@@ -1,7 +1,7 @@
 /*
- * The two shared styles for the controls a user clicks. Every page loads
+ * The two shared styles for the controls a user clicks, and the rule that
- * this file after tailwind.css. It is plain CSS: make css does not build
+ * hides an element marked x-cloak. Every page loads this file after
- * it.
+ * tailwind.css. It is plain CSS: make css does not build it.
  *
  * A button is btn-primary, btn-secondary or btn-danger, from input.css.
  * A secondary or inline action, such as Copy beside an entrypoint URL or
@@ -46,3 +46,11 @@
         outline-offset: 2px;
     }
 }
+
+/*
+ * Alpine.js removes x-cloak from an element once it has started, so
+ * something Alpine hides is not seen on the page while it loads.
+ */
+[x-cloak] {
+    display: none !important;
+}

static/js/app.js

@@ -58,6 +58,18 @@
     }
 })();
 
+// Asks before a form with a data-confirm attribute is sent, such as a
+// delete form on the webhook page. The browser's own prompt shows the
+// attribute's text, and the form is sent only if the user accepts.
+document.addEventListener("submit", function (event) {
+    "use strict";
+
+    const message = event.target.getAttribute("data-confirm");
+    if (message !== null && !window.confirm(message)) {
+        event.preventDefault();
+    }
+});
+
 // Alpine.js components.
 //
 // The pages' Content-Security-Policy forbids eval, so the UI loads

templates/event_body.html

@@ -5,7 +5,7 @@
 {{if .Binary}}
 <p class="text-xs text-gray-500">This body is binary ({{.Size}} bytes) and is not shown. <a href="{{.EventURL}}/body" class="btn-small">Download the body</a></p>
 {{else if .Text}}
-<pre class="rounded-md border border-gray-200 bg-white p-2 text-xs text-gray-700 overflow-x-auto whitespace-pre-wrap break-all"{{if .Scroll}} style="max-height: 32rem; overflow-y: auto"{{end}}>{{.Text}}</pre>
+<pre class="rounded-md border border-gray-200 bg-white p-2 text-xs text-gray-700 overflow-x-auto whitespace-pre-wrap break-all{{if .Scroll}} max-h-[32rem] overflow-y-auto{{end}}">{{.Text}}</pre>
 {{if .Cut}}
 <p class="mt-2 text-xs text-gray-500">Showing the first {{.ShownBytes}} of {{.Size}} bytes, unformatted. <a href="{{.EventURL}}" class="btn-small">Show the whole body</a> <a href="{{.EventURL}}/body" class="btn-small">Download the body</a></p>
 {{end}}

templates/htmlheader.html

@@ -4,6 +4,5 @@
 <title>{{block "title" .}}Webhooker{{end}}</title>
 <link rel="stylesheet" href="/s/css/tailwind.css">
 <link rel="stylesheet" href="/s/css/style.css">
-<style>[x-cloak] { display: none !important; }</style>
 {{block "head" .}}{{end}}
 {{end}}

templates/settings.html

@@ -13,13 +13,11 @@
             <div class="p-4">
                 <!-- A value too wide to sit beside its name moves to the
                      next line, where a list breaks only at the spaces
-                     between its entries. overflow-wrap: anywhere breaks
+                     between its entries. wrap-anywhere breaks inside a
-                     inside a value only when it alone is wider than the
+                     value only when it alone is wider than the line. -->
-                     line; an inline style, because the committed
-                     tailwind.css has no class for it. -->
                 <div class="flex flex-wrap justify-between items-start gap-4">
                     <code class="text-sm font-medium text-gray-900">{{.Name}}</code>
-                    <code class="text-sm text-gray-900" style="overflow-wrap: anywhere">{{.Value}}</code>
+                    <code class="text-sm text-gray-900 wrap-anywhere">{{.Value}}</code>
                 </div>
                 <p class="text-sm text-gray-500 mt-1">{{.Description}}</p>
             </div>

templates/source_detail.html

@@ -5,12 +5,10 @@
 {{define "content"}}
 <!-- 108rem, half again the 72rem (max-w-6xl) of the webhook list, the
      event log, the navbar and the footer, so an entrypoint URL fits on
-     one line. An inline style, because the committed tailwind.css has
+     one line. wrap-anywhere goes only on names and descriptions: a
-     no class this wide. wrap-anywhere goes only on names and
+     row too wide for a phone must still run past the edge, where the
-     descriptions: a row too wide for a phone must still run past the
+     browser test sees it, rather than break its controls mid-word. -->
-     edge, where the browser test sees it, rather than break its
+<div class="max-w-[108rem] mx-auto px-6 py-8">
-     controls mid-word. -->
-<div class="mx-auto px-6 py-8" style="max-width: 108rem">
     <div class="mb-6">
         <a href="/hooks" class="btn-small">&larr; Back to webhooks</a>
         <div class="flex flex-wrap justify-between items-center gap-2 mt-2">
@@ -23,11 +21,12 @@
             <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>
-                <!-- The delete prompts are the browser's own, so they
+                <!-- Before a delete form is sent, static/js/app.js
-                     work without the page's scripts. The template
+                     asks in the browser's own prompt, with the form's
-                     escapes each name for the script, so a quote or a
+                     data-confirm text; &#10; is a line break. The
-                     backslash in it shows as typed. -->
+                     template escapes each name for the attribute, so a
-                <form method="POST" action="/hook/{{.Webhook.ID}}/delete" onsubmit="return confirm('Delete webhook &quot;{{.Webhook.Name}}&quot;?\n\nThis deletes its stored events{{with .Stats}} ({{.WithinRetention.Events}}){{end}} and their deliveries. Any archive files it wrote are kept.')">
+                     quote in it shows as typed. -->
+                <form method="POST" action="/hook/{{.Webhook.ID}}/delete" data-confirm="Delete webhook &quot;{{.Webhook.Name}}&quot;?&#10;&#10;This deletes its stored events{{with .Stats}} ({{.WithinRetention.Events}}){{end}} and their deliveries. Any archive files it wrote are kept.">
                     <input type="hidden" name="csrf_token" value="{{.CSRFToken}}">
                     <button type="submit" class="btn-danger">Delete</button>
                 </form>
@@ -90,7 +89,7 @@
                                     {{if .Active}}Deactivate{{else}}Activate{{end}}
                                 </button>
                             </form>
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/entrypoints/{{.ID}}/delete" onsubmit="return confirm('Delete entrypoint &quot;{{if .Description}}{{.Description}}{{else}}{{$.BaseURL}}/h/{{.Path}}{{end}}&quot;?\n\nSenders using its URL get an error from now on, and the URL cannot be restored.')" class="inline">
+                            <form method="POST" action="/hook/{{$.Webhook.ID}}/entrypoints/{{.ID}}/delete" data-confirm="Delete entrypoint &quot;{{if .Description}}{{.Description}}{{else}}{{$.BaseURL}}/h/{{.Path}}{{end}}&quot;?&#10;&#10;Senders using its URL get an error from now on, and the URL cannot be restored." class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="btn-small text-red-600" title="Delete">Delete</button>
                             </form>
@@ -278,7 +277,7 @@
                                     {{if .Active}}Deactivate{{else}}Activate{{end}}
                                 </button>
                             </form>
-                            <form method="POST" action="/hook/{{$.Webhook.ID}}/targets/{{.ID}}/delete" onsubmit="return confirm('Delete target &quot;{{.Name}}&quot;?\n\nNothing more is delivered to it. Its past deliveries stay in the event log.')" class="inline">
+                            <form method="POST" action="/hook/{{$.Webhook.ID}}/targets/{{.ID}}/delete" data-confirm="Delete target &quot;{{.Name}}&quot;?&#10;&#10;Nothing more is delivered to it. Its past deliveries stay in the event log." class="inline">
                                 <input type="hidden" name="csrf_token" value="{{$.CSRFToken}}">
                                 <button type="submit" class="btn-small text-red-600" title="Delete">Delete</button>
                             </form>