Rewrite the README sentence by sentence (closes #157)

The old text failed the issue's prose rules: a 60-word sentence on the
content security policy, a markdown table of settings, comma-chained
lists of batch sizes and error codes, undefined jargon and an edge case
in the opening. The new text leads with what RouteWatch is, why it
exists and how to run it, then the pages, the API and the blocklists,
then the settings, memory and upaas, and last the design and the
development workflow. Every statement was checked against the code on
next. The PR body lists where the old text disagreed with the code.

Model: fable-5-1

API_POLICIES.md

@@ -0,0 +1,20 @@
+---
+title: API Policies
+last_modified: 2026-10-27
+---
+
+A value in an API response is never a string with a label or unit in it. A value
+of a native type is sent as that type, and its unit goes in the field name, for
+example `_ms`.
+
+Wrong:
+
+```json
+{ "execution_time": "0 ms" }
+```
+
+Right:
+
+```json
+{ "execution_time_ms": 0 }
+```

REPO_POLICIES.md

@@ -1,6 +1,6 @@
 ---
 title: Repository Policies
-last_modified: 2026-10-18
+last_modified: 2026-10-27
 ---
 
 This document covers repository structure, tooling, and workflow standards. Code
@@ -12,6 +12,7 @@ style conventions are in separate documents:
 - [JavaScript](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE_JS.md)
 - [Python](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE_PYTHON.md)
 - [Go HTTP Server Conventions](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/GO_HTTP_SERVER_CONVENTIONS.md)
+- [API Policies](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/API_POLICIES.md)
 
 ---
 
@@ -174,27 +175,32 @@ style conventions are in separate documents:
   `script/cibuild`. `script/lint`, `script/test`, `script/cibuild` and
   `script/docker` are the four, and there is no fifth — `script/check` runs the
   two gate phases and `script/fmt-check`, and builds no image of its own. In
-  every stage of the `Dockerfile`, `ARG CACHEBUST` comes right after the steps
-  that install system packages and download Go's modules, or right after `FROM`
-  in a stage with neither, and every step that lints, tests or compiles comes
-  after it. A step that installs anything else as well, such as a
-  `script/bootstrap` that also installs node packages, comes after it too. A new
-  value reruns every `RUN` step after that line; `COPY` steps are compared by
-  content and need nothing. Docker keeps the layers above the line until the
-  base image, their own lines or the files they copy change. A stage without the
-  `ARG` line is served from cache on an unchanged tree, so a repository
-  re-vendors the scripts and adds the `ARG` lines in one commit. The scripts do
-  not pass `--no-cache`: it reruns every step too, but it also builds the layers
-  above the line again and empties every cache mount, so Go's build cache and
-  golangci-lint's, which the canonical Go `Dockerfile` below mounts so that they
-  survive between check builds, would start empty every time. A bare
-  `docker build .` is not evidence that anything ran: a sub-second build
-  reporting success is a cache hit, not a result. Never invalidate by pruning —
-  `docker builder prune` and friends destroy a build cache shared with every
-  other build on the host. When a check is added or changed, prove it works by
-  planting a defect it must catch and watching the run fail on it, then revert
-  the defect. A green run alone shows neither that the check ran nor that it
-  covers what it should.
+  every stage of the `Dockerfile`, every step that lints, tests or compiles
+  comes after `ARG CACHEBUST`. `ARG CACHEBUST` comes right after these steps:
+    - the steps that install system packages
+    - the steps that download Go's modules
+    - the step that runs `script/bootstrap` to install a Python `test` phase's
+      packages from `Pipfile.lock`
+
+    A stage with none of these steps declares `ARG CACHEBUST` right after
+    `FROM`. A step that installs anything else as well, such as a
+    `script/bootstrap` that also installs node packages, comes after it too. A
+    new value reruns every `RUN` step after that line; `COPY` steps are compared
+    by content and need nothing. Docker keeps the layers above the line until
+    the base image, their own lines or the files they copy change. A stage
+    without the `ARG` line is served from cache on an unchanged tree, so a
+    repository re-vendors the scripts and adds the `ARG` lines in one commit.
+    The scripts do not pass `--no-cache`: it reruns every step too, but it also
+    builds the layers above the line again and empties every cache mount, so
+    Go's build cache and golangci-lint's, which the canonical Go `Dockerfile`
+    below mounts so that they survive between check builds, would start empty
+    every time. A bare `docker build .` is not evidence that anything ran: a
+    sub-second build reporting success is a cache hit, not a result. Never
+    invalidate by pruning — `docker builder prune` and friends destroy a build
+    cache shared with every other build on the host. When a check is added or
+    changed, prove it works by planting a defect it must catch and watching the
+    run fail on it, then revert the defect. A green run alone shows neither that
+    the check ran nor that it covers what it should.
 
 - **The gate phases are separate stages, and the build stage depends on both.**
   The lint phase is based on the `golangci/golangci-lint` image (pinned by
@@ -309,6 +315,9 @@ style conventions are in separate documents:
           a package's findings only when the package's files and those of every
           package it imports, `go.mod`, the linters and their settings in
           `.golangci.yml`, and the golangci-lint version are all unchanged.
+        - In a Python `test` phase, the layer of the step that runs
+          `script/bootstrap` to install the packages from `Pipfile.lock`, as
+          described for that phase below.
     - If the project uses `//go:embed` directives that reference build artifacts
       (e.g. a web frontend compiled in a separate stage), the lint phase must
       create placeholder files so the embed directives resolve. Example:
@@ -363,6 +372,67 @@ style conventions are in separate documents:
       `--build-arg VERSION=...`, as `script/docker` and `script/cibuild` already
       do.
 
+- **A Python `test` phase that installs its packages from `Pipfile.lock` does it
+  above `ARG CACHEBUST`, so check builds keep them.** The steps are
+  `COPY script/ script/`, `COPY Pipfile Pipfile.lock ./` and
+  `RUN script/bootstrap`, with `ARG CACHEBUST` right after them. Docker keeps
+  what that `RUN` installed until the base image, `script/`, `Pipfile`,
+  `Pipfile.lock` or a line up to and including the `RUN` changes. The tests run
+  after `ARG CACHEBUST`, on every check build. In every other stage, a step that
+  installs Python packages comes after `ARG CACHEBUST`.
+    - When `script/bootstrap` runs in that step, it installs nothing beyond
+      system packages, pipenv and its dependencies, and the packages from
+      `Pipfile.lock`. It installs no Python there: the tests use the base
+      image's Python, which the image's hash pins. If it installs anything else
+      there, the step goes after `ARG CACHEBUST`.
+    - Every external reference must be pinned by hash, so `script/bootstrap`
+      installs pipenv and its dependencies by hash. It does so with
+      `pip install --require-hashes -r` and a requirements file in `script/`
+      that lists each of them with `==` and its `--hash`. pip refuses to install
+      a dependency the file does not list.
+    - It then runs `pipenv install --deploy`, with `--dev` when the tests need
+      the development packages. `--deploy` installs only what `Pipfile.lock`
+      names, checks every package against the lockfile's hashes, and fails when
+      the lockfile is out of date with `Pipfile`.
+    - A kept layer holds nothing a new install would refuse: pip checked pipenv
+      and its dependencies, and pipenv checked the lockfile's packages, against
+      their hashes. pipenv creates its virtual environment with the `virtualenv`
+      package. The packages that `virtualenv` adds come from wheels inside that
+      package, so the hash pip checked for it covers them. Two things in the
+      layer are not fixed by a hash. A package with no ready-built wheel for the
+      image is built from source. pip downloads the build tools without a hash
+      check, so a kept layer's build of such a package may differ from a new
+      one. And system packages keep the versions the package manager gave when
+      the layer was built; a new install may get newer ones.
+    - As with Go's modules, the packages are kept in a layer, not a cache mount.
+      A cache mount is shared by every build on the host, and nothing checks its
+      files again.
+
+    In this example, `script/bootstrap` finds `make` and `git` already
+    installed, installs pipenv and its dependencies by hash, and runs
+    `pipenv install --dev --deploy`:
+
+    ```dockerfile
+    # Test phase. The 90-second timeout covers both pytest runs.
+    # python:3.x-slim, YYYY-MM-DD
+    FROM python@sha256:... AS test
+    # make and git are base tools that script/bootstrap installs when they
+    # are missing. Installed here, they stay in their own layer when
+    # script/ changes.
+    RUN apt-get update \
+        && apt-get install -y --no-install-recommends make git \
+        && rm -rf /var/lib/apt/lists/*
+    WORKDIR /app
+    COPY script/ script/
+    COPY Pipfile Pipfile.lock ./
+    RUN script/bootstrap
+    ARG CACHEBUST
+    COPY . .
+    RUN timeout 90 sh -c 'pipenv run pytest || { \
+            echo "--- Rerunning with -v for details ---"; \
+            pipenv run pytest -v; exit 1; }'
+    ```
+
 - Every repo should have a Gitea Actions workflow (`.gitea/workflows/`) that
   runs `script/cibuild` on push, and checks out the repo as its only other step,
   with `persist-credentials: false`: `script/cibuild` needs no token, and

TODO.md

@@ -35,6 +35,26 @@ tested.
 
 # Completed Steps
 
+- 2026-10-27: README "Rationale" says why RouteWatch exists: to answer our other
+  services' questions about IP addresses, from its own routing table and the
+  WHOIS details it keeps. It still says what RIS Live does not give (closes
+  #204)
+- 2026-10-27: every JSON answer carries `@meta`. A panic on a JSON route answers
+  500 with the JSON error body. `/status.json` and the health check answer 405
+  with the JSON error body to any method they do not take. The 500 and the 405
+  used to have an empty body. The home page's IP lookup shows the whole JSON
+  answer, `@meta` included. It used to show only the answer's `data`, or only
+  the message of an error answer. A test checks `@meta` on every JSON route, in
+  its successes and its errors (closes #201)
+- 2026-10-27: every value in a JSON answer that has a unit is a number, with the
+  unit at the end of its field name. `@meta.execution_time` is now
+  `execution_time_ms`. The stats' `uptime`, `connection_duration` and
+  `memory_usage` are now `uptime_seconds`, `connection_duration_seconds` and
+  `memory_usage_bytes`. `whois_stats.current_interval` is now
+  `current_interval_seconds`. They used to be strings such as "12 ms",
+  "1h18m34s" or "1.1 GB". `connection_duration_seconds` is null while the feed
+  is not connected. `API_POLICIES.md` is vendored from `sneak/prompts`, and
+  `REPO_POLICIES.md` re-vendored (closes #199)
 - 2026-10-27: every result of the IP lookup has the same fields. A field without
   a value is null. It used to be left out. An address with no live route has
   every route and AS field set to null, and `ptr` is an empty list when there

internal/server/handlers.go

@@ -23,7 +23,6 @@ import (
 	"git.eeqj.de/sneak/routewatch/internal/streamer"
 	"git.eeqj.de/sneak/routewatch/internal/templates"
 	asinfo "git.eeqj.de/sneak/routewatch/pkg/asinfo"
-	"github.com/dustin/go-humanize"
 	"github.com/go-chi/chi/v5"
 )
 
@@ -226,18 +225,23 @@ type WHOISStatsInfo struct {
 	NeverFetched      int     `json:"never_fetched"`
 	SuccessesLastHour int     `json:"successes_last_hour"`
 	ErrorsLastHour    int     `json:"errors_last_hour"`
-	CurrentInterval   string  `json:"current_interval"`
 	ConsecutiveFails  int     `json:"consecutive_fails"`
 	FreshPercent      float64 `json:"fresh_percent"`
+
+	// CurrentIntervalSeconds is the wait between two fetches. It can have a
+	// fractional part, such as 22.5.
+	CurrentIntervalSeconds float64 `json:"current_interval_seconds"`
 }
 
 // Stats is the /status.json answer: uptime, message counts, database stats,
-// and the routing table's figures. OldestRoute and NewestRoute are the times
-// of the oldest and the newest kept routes.
+// and the routing table's figures. UptimeSeconds is the time since the stream
+// last connected, or 0 if it has never connected. MemoryUsageBytes is the Go
+// heap in use. OldestRoute and NewestRoute are the times of the oldest and the
+// newest kept routes.
 //
 //nolint:tagliatelle // field names are the existing JSON API
 type Stats struct {
-	Uptime                 string               `json:"uptime"`
+	UptimeSeconds          int64                `json:"uptime_seconds"`
 	TotalMessages          uint64               `json:"total_messages"`
 	TotalBytes             uint64               `json:"total_bytes"`
 	TotalWireBytes         uint64               `json:"total_wire_bytes"`
@@ -247,7 +251,7 @@ type Stats struct {
 	Connected              bool                 `json:"connected"`
 	GoVersion              string               `json:"go_version"`
 	Goroutines             int                  `json:"goroutines"`
-	MemoryUsage            string               `json:"memory_usage"`
+	MemoryUsageBytes       uint64               `json:"memory_usage_bytes"`
 	ASNs                   int                  `json:"asns"`
 	Prefixes               int                  `json:"prefixes"`
 	IPv4Prefixes           int                  `json:"ipv4_prefixes"`
@@ -362,7 +366,7 @@ func (s *Server) statusStats(
 	runtime.ReadMemStats(&memStats)
 
 	return Stats{
-		Uptime:                 streamUptime(streamMetrics.ConnectedSince),
+		UptimeSeconds:          uptimeSeconds(streamMetrics.ConnectedSince),
 		TotalMessages:          streamMetrics.TotalMessages,
 		TotalBytes:             streamMetrics.TotalBytes,
 		TotalWireBytes:         streamMetrics.TotalWireBytes,
@@ -372,7 +376,7 @@ func (s *Server) statusStats(
 		Connected:              streamMetrics.Connected,
 		GoVersion:              runtime.Version(),
 		Goroutines:             runtime.NumGoroutine(),
-		MemoryUsage:            humanize.Bytes(memStats.Alloc),
+		MemoryUsageBytes:       memStats.Alloc,
 		ASNs:                   dbStats.ASNs,
 		Prefixes:               counts.IPv4Prefixes + counts.IPv6Prefixes,
 		IPv4Prefixes:           counts.IPv4Prefixes,
@@ -439,30 +443,31 @@ func (s *Server) getWHOISStats(ctx context.Context) *WHOISStatsInfo {
 		NeverFetched:      dbStats.NeverFetched,
 		SuccessesLastHour: fetcherStats.SuccessesLastHour,
 		ErrorsLastHour:    fetcherStats.ErrorsLastHour,
-		CurrentInterval:   fetcherStats.CurrentInterval.String(),
 		ConsecutiveFails:  fetcherStats.ConsecutiveFails,
 		FreshPercent:      freshPercent,
+
+		CurrentIntervalSeconds: fetcherStats.CurrentInterval.Seconds(),
 	}
 }
 
-// streamUptime is how long the stream has been connected, to the second, or
-// "0s" if it has never connected.
-func streamUptime(connectedSince time.Time) string {
+// uptimeSeconds is the number of whole seconds since the stream last
+// connected, or 0 if it has never connected.
+func uptimeSeconds(connectedSince time.Time) int64 {
 	if connectedSince.IsZero() {
-		return "0s"
+		return 0
 	}
 
-	return time.Since(connectedSince).Truncate(time.Second).String()
+	return int64(time.Since(connectedSince) / time.Second)
 }
 
-// connectionDuration is how long the stream has been connected, to the
-// second, or "disconnected".
-func connectionDuration(connected bool, connectedSince time.Time) string {
+// connectionDurationSeconds is the number of whole seconds the stream has
+// been connected, or nil while it is not connected.
+func connectionDurationSeconds(connected bool, connectedSince time.Time) *int64 {
 	if !connected || connectedSince.IsZero() {
-		return "disconnected"
+		return nil
 	}
 
-	return time.Since(connectedSince).Truncate(time.Second).String()
+	return new(uptimeSeconds(connectedSince))
 }
 
 // whoisStaleThreshold matches the fetcher's threshold for consistency.
@@ -512,7 +517,7 @@ type StreamStats struct {
 //
 //nolint:tagliatelle // field names are the existing JSON API
 type StatsResponse struct {
-	Uptime                 string               `json:"uptime"`
+	UptimeSeconds          int64                `json:"uptime_seconds"`
 	TotalMessages          uint64               `json:"total_messages"`
 	TotalBytes             uint64               `json:"total_bytes"`
 	TotalWireBytes         uint64               `json:"total_wire_bytes"`
@@ -520,11 +525,10 @@ type StatsResponse struct {
 	MbitsPerSec            float64              `json:"mbits_per_sec"`
 	WireMbitsPerSec        float64              `json:"wire_mbits_per_sec"`
 	Connected              bool                 `json:"connected"`
-	ConnectionDuration     string               `json:"connection_duration"`
 	ReconnectCount         uint64               `json:"reconnect_count"`
 	GoVersion              string               `json:"go_version"`
 	Goroutines             int                  `json:"goroutines"`
-	MemoryUsage            string               `json:"memory_usage"`
+	MemoryUsageBytes       uint64               `json:"memory_usage_bytes"`
 	GC                     GCStats              `json:"gc"`
 	Stream                 StreamStats          `json:"stream"`
 	ASNs                   int                  `json:"asns"`
@@ -546,6 +550,9 @@ type StatsResponse struct {
 	IPv6PrefixDistribution []PrefixDistribution `json:"ipv6_prefix_distribution"`
 	WHOISStats             *WHOISStatsInfo      `json:"whois_stats,omitempty"`
 
+	// ConnectionDurationSeconds is null while the stream is not connected.
+	ConnectionDurationSeconds *int64 `json:"connection_duration_seconds"`
+
 	OriginsWithoutKeptRoute int `json:"origins_without_kept_route"`
 }
 
@@ -684,20 +691,18 @@ func (s *Server) statsResponse(
 	runtime.ReadMemStats(&memStats)
 
 	return StatsResponse{
-		Uptime:          streamUptime(streamMetrics.ConnectedSince),
-		TotalMessages:   streamMetrics.TotalMessages,
-		TotalBytes:      streamMetrics.TotalBytes,
-		TotalWireBytes:  streamMetrics.TotalWireBytes,
-		MessagesPerSec:  streamMetrics.MessagesPerSec,
-		MbitsPerSec:     streamMetrics.BitsPerSec / bitsPerMegabit,
-		WireMbitsPerSec: streamMetrics.WireBitsPerSec / bitsPerMegabit,
-		Connected:       streamMetrics.Connected,
-		ConnectionDuration: connectionDuration(
-			streamMetrics.Connected, streamMetrics.ConnectedSince),
+		UptimeSeconds:          uptimeSeconds(streamMetrics.ConnectedSince),
+		TotalMessages:          streamMetrics.TotalMessages,
+		TotalBytes:             streamMetrics.TotalBytes,
+		TotalWireBytes:         streamMetrics.TotalWireBytes,
+		MessagesPerSec:         streamMetrics.MessagesPerSec,
+		MbitsPerSec:            streamMetrics.BitsPerSec / bitsPerMegabit,
+		WireMbitsPerSec:        streamMetrics.WireBitsPerSec / bitsPerMegabit,
+		Connected:              streamMetrics.Connected,
 		ReconnectCount:         streamMetrics.ReconnectCount,
 		GoVersion:              runtime.Version(),
 		Goroutines:             runtime.NumGoroutine(),
-		MemoryUsage:            humanize.Bytes(memStats.Alloc),
+		MemoryUsageBytes:       memStats.Alloc,
 		GC:                     gcStats(&memStats),
 		Stream:                 s.streamStats(),
 		ASNs:                   dbStats.ASNs,
@@ -719,6 +724,9 @@ func (s *Server) statsResponse(
 		IPv6PrefixDistribution: prefixDistribution(counts.IPv6PrefixesByLength),
 		WHOISStats:             whoisStats,
 
+		ConnectionDurationSeconds: connectionDurationSeconds(
+			streamMetrics.Connected, streamMetrics.ConnectedSince),
+
 		OriginsWithoutKeptRoute: counts.OriginsWithoutKeptRoute,
 	}
 }

internal/server/handlers_internal_test.go

@@ -73,8 +73,8 @@ func emptyTable() *routetable.Table {
 // Paths several tests request.
 const (
 	asPagePath           = "/as/64500"
+	asJSONPath           = "/api/v1/as/64500"
 	prefixLengthPagePath = "/prefixlength/24"
-	statusJSONPath       = "/status.json"
 	statsPath            = "/api/v1/stats"
 )
 
@@ -295,6 +295,167 @@ func TestStatsAnswerCarriesChurnPerMinute(t *testing.T) {
 	}
 }
 
+// fixedIntervalASNFetcher is a WHOIS fetcher that does nothing and reports
+// interval as its wait between fetches.
+type fixedIntervalASNFetcher struct {
+	idleASNFetcher
+
+	interval time.Duration
+}
+
+func (f fixedIntervalASNFetcher) GetStats() ASNFetcherStats {
+	return ASNFetcherStats{CurrentInterval: f.interval}
+}
+
+// unitStats holds the figures of a stats answer that carry a unit. Each is a
+// pointer, so that a figure missing from the answer is nil.
+//
+//nolint:tagliatelle // field names are the existing JSON API
+type unitStats struct {
+	UptimeSeconds    *int64  `json:"uptime_seconds"`
+	MemoryUsageBytes *uint64 `json:"memory_usage_bytes"`
+	WHOISStats       struct {
+		CurrentIntervalSeconds *float64 `json:"current_interval_seconds"`
+	} `json:"whois_stats"`
+	GC struct {
+		HeapAllocBytes uint64 `json:"heap_alloc_bytes"`
+	} `json:"gc"`
+}
+
+// TestStatsAnswersGiveUnitsInFieldNames checks that the figures of both stats
+// answers that carry a unit are numbers, with the unit at the end of their
+// names. They used to be strings with the unit in them, such as "1h18m34s" or
+// "1.1 GB" (https://git.eeqj.de/sneak/routewatch/issues/199). The stream has
+// never connected, so the uptime is 0. The memory use in /api/v1/stats is the
+// same number of bytes as its gc.heap_alloc_bytes.
+func TestStatsAnswersGiveUnitsInFieldNames(t *testing.T) {
+	t.Parallel()
+
+	const fetchInterval = 18200 * time.Millisecond
+
+	s := newServerWithTestRoutes(t)
+	s.SetASNFetcher(fixedIntervalASNFetcher{interval: fetchInterval})
+
+	for _, path := range []string{statusJSONPath, statsPath} {
+		answer := get(t, s, path).Body.Bytes()
+
+		var body struct {
+			Data unitStats `json:"data"`
+		}
+
+		err := json.Unmarshal(answer, &body)
+		if err != nil {
+			t.Errorf("%s: figures are not numbers: %v; answer %s", path, err, answer)
+
+			continue
+		}
+
+		got := body.Data
+		if got.UptimeSeconds == nil || *got.UptimeSeconds != 0 {
+			t.Errorf("%s: uptime_seconds is not 0: %s", path, answer)
+		}
+
+		if got.MemoryUsageBytes == nil || *got.MemoryUsageBytes == 0 {
+			t.Errorf("%s: memory_usage_bytes is not a number of bytes: %s",
+				path, answer)
+		}
+
+		interval := got.WHOISStats.CurrentIntervalSeconds
+		if interval == nil || *interval != fetchInterval.Seconds() {
+			t.Errorf("%s: whois_stats.current_interval_seconds is not %v: %s",
+				path, fetchInterval.Seconds(), answer)
+		}
+
+		if path == statsPath && got.MemoryUsageBytes != nil &&
+			*got.MemoryUsageBytes != got.GC.HeapAllocBytes {
+			t.Errorf("%s: memory_usage_bytes %d, want gc.heap_alloc_bytes %d",
+				path, *got.MemoryUsageBytes, got.GC.HeapAllocBytes)
+		}
+	}
+}
+
+// TestStatsAnswerGivesConnectionDurationInSeconds checks that the
+// connection_duration_seconds of /api/v1/stats is null while the stream is not
+// connected, and a whole number of seconds once it is. It used to be the
+// string "disconnected", or a Go duration such as "1h18m34s"
+// (https://git.eeqj.de/sneak/routewatch/issues/199).
+func TestStatsAnswerGivesConnectionDurationInSeconds(t *testing.T) {
+	t.Parallel()
+
+	s := newServerWithTestRoutes(t)
+
+	connectionDuration := func() json.RawMessage {
+		answer := get(t, s, statsPath).Body.Bytes()
+
+		var body struct {
+			Data map[string]json.RawMessage `json:"data"`
+		}
+
+		err := json.Unmarshal(answer, &body)
+		if err != nil {
+			t.Fatalf("decoding the answer: %v; answer %s", err, answer)
+		}
+
+		duration, ok := body.Data["connection_duration_seconds"]
+		if !ok {
+			t.Fatalf("no connection_duration_seconds: %s", answer)
+		}
+
+		return duration
+	}
+
+	disconnected := connectionDuration()
+	if string(disconnected) != "null" {
+		t.Errorf("disconnected: connection_duration_seconds = %s, want null",
+			disconnected)
+	}
+
+	s.streamer.GetMetricsTracker().SetConnected(true)
+
+	var seconds int64
+
+	connected := connectionDuration()
+
+	err := json.Unmarshal(connected, &seconds)
+	if err != nil || seconds != 0 {
+		t.Errorf("just connected: connection_duration_seconds = %s, want 0",
+			connected)
+	}
+}
+
+// TestStreamDurationsCountSeconds checks that the uptime and the connection
+// duration of a stream that connected 90 seconds ago are both 90. A stream
+// that has never connected has an uptime of 0, and one that is not connected
+// has no connection duration.
+func TestStreamDurationsCountSeconds(t *testing.T) {
+	t.Parallel()
+
+	const connectedFor = 90 * time.Second
+
+	connectedSince := time.Now().Add(-connectedFor)
+	want := int64(connectedFor / time.Second)
+
+	if got := uptimeSeconds(connectedSince); got != want {
+		t.Errorf("uptimeSeconds = %d, want %d", got, want)
+	}
+
+	if got := uptimeSeconds(time.Time{}); got != 0 {
+		t.Errorf("uptimeSeconds before any connection = %d, want 0", got)
+	}
+
+	switch got := connectionDurationSeconds(true, connectedSince); {
+	case got == nil:
+		t.Errorf("connectionDurationSeconds = nil, want %d", want)
+	case *got != want:
+		t.Errorf("connectionDurationSeconds = %d, want %d", *got, want)
+	}
+
+	if got := connectionDurationSeconds(false, connectedSince); got != nil {
+		t.Errorf("connectionDurationSeconds while not connected = %d, want nil",
+			*got)
+	}
+}
+
 // newTestTable returns a routing table that holds a route for testPrefixV4,
 // with origin AS 64500, and one for testPrefixV6, with origin AS 64501.
 func newTestTable() *routetable.Table {
@@ -766,7 +927,7 @@ func TestRoutesAnswer504WhenDatabaseReadIsCutOff(t *testing.T) {
 		{path: "/ip/" + addrInTestPrefixV4, wantJSONBody: true},
 		{path: statsPath, wantJSONBody: true},
 		{path: "/api/v1/ip/" + addrInTestPrefixV4, wantJSONBody: true},
-		{path: "/api/v1/as/64500", wantJSONBody: true},
+		{path: asJSONPath, wantJSONBody: true},
 	}
 
 	for _, tt := range tests {
@@ -947,10 +1108,10 @@ func TestJSONRoutesDoNotSendErrorDetails(t *testing.T) {
 		path     string
 		wantCode int
 	}{
-		{"/.well-known/healthcheck.json", http.StatusServiceUnavailable},
+		{healthCheckPath, http.StatusServiceUnavailable},
 		{statusJSONPath, http.StatusInternalServerError},
 		{statsPath, http.StatusInternalServerError},
-		{"/api/v1/as/64500", http.StatusInternalServerError},
+		{asJSONPath, http.StatusInternalServerError},
 		{"/api/v1/ip/" + addrInTestPrefixV4, http.StatusInternalServerError},
 		{"/api/v1/prefix/foo/24", http.StatusBadRequest},
 	}
@@ -1316,6 +1477,9 @@ func TestIPLookupReportsBlocklists(t *testing.T) {
 // jsonNull is how JSON writes a field without a value.
 const jsonNull = "null"
 
+// jsonEmptyList is how JSON writes an empty list.
+const jsonEmptyList = "[]"
+
 // resultFields decodes an IP lookup answer and returns each of its results as
 // its JSON fields.
 func resultFields(t *testing.T, answer []byte) []map[string]json.RawMessage {
@@ -1451,6 +1615,37 @@ func TestIPLookupResultsHaveTheSameFields(t *testing.T) {
 	}
 }
 
+// TestIPLookupOfAnAddressWithoutPTRNamesOrStoredNetblock looks up a routed
+// address that has no PTR names, and whose netblock the database has not
+// stored. Its ptr is an empty list and its first_seen is null. Before the fix
+// ptr was left out, and first_seen was 0001-01-01T00:00:00Z
+// (https://git.eeqj.de/sneak/routewatch/issues/200).
+func TestIPLookupOfAnAddressWithoutPTRNamesOrStoredNetblock(t *testing.T) {
+	t.Parallel()
+
+	s := newServerWithTestRoutes(t)
+	s.resolver = &fakeResolver{}
+
+	path := "/api/v1/ip/" + addrInTestPrefixV4
+
+	results := resultFields(t, get(t, s, path).Body.Bytes())
+	if len(results) != 1 {
+		t.Fatalf("%s: %d results, want 1", path, len(results))
+	}
+
+	want := map[string]string{
+		"ptr":        jsonEmptyList,
+		"first_seen": jsonNull,
+	}
+
+	for name, value := range want {
+		got := string(results[0][name])
+		if got != value {
+			t.Errorf("%s: %s is %s, want %s", path, name, got, value)
+		}
+	}
+}
+
 // TestIPLookupAnswersMayBeCached checks the Cache-Control header of the IP
 // lookup answers. Caches may keep them for the blocklists' shortest interval,
 // and only the caller's own browser may keep the answer about the caller's

internal/server/middleware.go

@@ -16,6 +16,7 @@ import (
 	"time"
 
 	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
 )
 
 // responseWriter wraps http.ResponseWriter to capture the response
@@ -53,6 +54,15 @@ func (rw *responseWriter) Header() http.Header {
 	return rw.ResponseWriter.Header()
 }
 
+// The @meta object JSONResponseMiddleware adds to a JSON answer: its key, and
+// the keys of its fields.
+const (
+	jsonKeyMeta            = "@meta"
+	metaKeyTimeZone        = "time_zone"
+	metaKeyAPIVersion      = "api_version"
+	metaKeyExecutionTimeMs = "execution_time_ms"
+)
+
 // JSONResponseMiddleware is an HTTP middleware that wraps all JSON responses
 // with a @meta field containing execution metadata. The metadata includes the
 // time zone (always UTC), API version, and request execution time in milliseconds.
@@ -106,10 +116,10 @@ func JSONResponseMiddleware(next http.Handler) http.Handler {
 		}
 
 		// Add @meta field
-		originalResponse["@meta"] = map[string]any{
-			"time_zone":      "UTC",
-			"api_version":    1,
-			"execution_time": fmt.Sprintf("%d ms", execTime.Milliseconds()),
+		originalResponse[jsonKeyMeta] = map[string]any{
+			metaKeyTimeZone:        "UTC",
+			metaKeyAPIVersion:      1,
+			metaKeyExecutionTimeMs: execTime.Milliseconds(),
 		}
 
 		// Write the enhanced response
@@ -145,7 +155,8 @@ func deadlinePassed(ctx context.Context) bool {
 // has passed, it answers 504 with the error message "Request timeout". A 4xx
 // keeps its status, with the status's standard text as the message. For other
 // errors, it returns "Internal server error", with status 500 if the original
-// status was 200.
+// status was 200. A panic in the handler answers 500 with "Internal server
+// error" too.
 //
 // Non-JSON responses are passed through unchanged.
 func JSONValidationMiddleware(next http.Handler) http.Handler {
@@ -157,8 +168,9 @@ func JSONValidationMiddleware(next http.Handler) http.Handler {
 			statusCode:     http.StatusOK,
 		}
 
-		// Serve the request
-		next.ServeHTTP(rw, r)
+		// Serve the request. Recoverer logs a panic in the handler and turns it
+		// into a 500 without a body, which gets the JSON error body below.
+		middleware.Recoverer(next).ServeHTTP(rw, r)
 
 		// Check if it's meant to be a JSON response
 		contentType := rw.Header().Get("Content-Type")

internal/server/middleware_internal_test.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"io"
 	"log/slog"
@@ -10,6 +11,7 @@ import (
 	"net/http/httptest"
 	"net/netip"
 	"os"
+	"regexp"
 	"strings"
 	"testing"
 	"time"
@@ -100,6 +102,219 @@ func TestJSONValidationKeeps4xxWithoutBody(t *testing.T) {
 	checkJSONErrorMessage(t, name, rec, http.StatusText(http.StatusBadRequest))
 }
 
+// TestJSONAnswersPutNoUnitInAString sends a request to each JSON route and
+// checks each answer. Its @meta.execution_time_ms is a number, and none of its
+// strings is a number with a unit, such as "12 ms", "1.1 GB" or "1h18m34s"
+// (https://git.eeqj.de/sneak/routewatch/issues/199). The health check answers
+// 503, since the stream is not connected, and the last path matches no route.
+func TestJSONAnswersPutNoUnitInAString(t *testing.T) {
+	t.Parallel()
+
+	numberWithUnit := regexp.MustCompile(
+		`^([0-9]+(\.[0-9]+)? ?(ns|µs|ms|s|m|h|B|kB|MB|GB|TB))+$`)
+
+	s := newServerWithTestRoutes(t)
+	s.resolver = &fakeResolver{}
+	s.SetASNFetcher(fixedIntervalASNFetcher{interval: time.Second})
+
+	paths := []string{
+		statusJSONPath,
+		statsPath,
+		healthCheckPath,
+		"/api/v1/ip/" + untrustedPeerAddr,
+		"/ip/" + untrustedPeerAddr,
+		asJSONPath,
+		"/api/v1/prefix/" + testPrefixV4,
+		"/api/v1/search/as?q=google",
+		"/api/v1/no-such-route",
+	}
+
+	for _, path := range paths {
+		rec := httptest.NewRecorder()
+		s.router.ServeHTTP(rec, httptest.NewRequestWithContext(
+			t.Context(), http.MethodGet, path, nil))
+
+		var answer map[string]any
+
+		err := json.Unmarshal(rec.Body.Bytes(), &answer)
+		if err != nil {
+			t.Errorf("%s: decoding the answer: %v; answer %s", path, err, rec.Body)
+
+			continue
+		}
+
+		meta, _ := answer["@meta"].(map[string]any)
+		if _, ok := meta["execution_time_ms"].(float64); !ok {
+			t.Errorf("%s: @meta.execution_time_ms is not a number: %s",
+				path, rec.Body)
+		}
+
+		for _, value := range stringsIn(answer) {
+			if numberWithUnit.MatchString(value) {
+				t.Errorf("%s: %q is a number with a unit in a string", path, value)
+			}
+		}
+	}
+}
+
+// TestJSONAnswersCarryMeta sends requests to every JSON route through the
+// server's router, and checks that each answer carries @meta with its three
+// fields. The answers include successes, and errors that the handlers, the
+// router and the middleware write. Before the fix a panic in a handler, and a
+// method /status.json or the health check does not take, answered with an
+// empty body (https://git.eeqj.de/sneak/routewatch/issues/201).
+func TestJSONAnswersCarryMeta(t *testing.T) {
+	t.Parallel()
+
+	// JSON routes whose handlers write nothing or panic, so that the JSON
+	// check on the route writes the error answer itself.
+	const (
+		writesNothingPath = "/writes-nothing.json"
+		panicsPath        = "/panics.json"
+	)
+
+	s := newServerWithTestRoutes(t)
+	s.resolver = &fakeResolver{}
+	s.streamer.GetMetricsTracker().SetConnected(true)
+	s.router.Get(writesNothingPath, JSONValidationMiddleware(http.HandlerFunc(
+		func(http.ResponseWriter, *http.Request) {})).ServeHTTP)
+	s.router.Get(panicsPath, JSONValidationMiddleware(http.HandlerFunc(
+		func(http.ResponseWriter, *http.Request) { panic(errDiskIO) })).ServeHTTP)
+
+	tests := []struct {
+		method   string
+		path     string
+		wantCode int
+	}{
+		// Answers that succeed
+		{http.MethodGet, statusJSONPath, http.StatusOK},
+		{http.MethodGet, healthCheckPath, http.StatusOK},
+		{http.MethodGet, "/ip", http.StatusOK},
+		{http.MethodGet, ownAddressPath, http.StatusOK},
+		{http.MethodGet, "/ip/" + addrInTestPrefixV4, http.StatusOK},
+		{http.MethodGet, statsPath, http.StatusOK},
+		{http.MethodGet, "/api/v1/ip/" + addrInTestPrefixV4, http.StatusOK},
+		{http.MethodGet, asJSONPath, http.StatusOK},
+		{http.MethodGet, "/api/v1/prefix/" + testPrefixV4, http.StatusOK},
+		{http.MethodGet, "/api/v1/search/as?q=google", http.StatusOK},
+		// Errors the handlers write
+		{http.MethodGet, "/ip/no-such-host.example", http.StatusBadRequest},
+		{http.MethodGet, "/api/v1/ip/no-such-host.example", http.StatusBadRequest},
+		{http.MethodGet, "/api/v1/as/foo", http.StatusBadRequest},
+		{http.MethodGet, "/api/v1/as/0", http.StatusNotFound},
+		{http.MethodGet, "/api/v1/prefix/192.0.2.0/33", http.StatusBadRequest},
+		{http.MethodGet, "/api/v1/prefix/198.51.100.0/24", http.StatusNotFound},
+		{http.MethodGet, "/api/v1/search/as", http.StatusBadRequest},
+		// Errors the router and the middleware write
+		{http.MethodGet, "/api/v1/no-such-route", http.StatusNotFound},
+		{http.MethodGet, "/ip/192.0.2.1/nothing", http.StatusNotFound},
+		{http.MethodPost, statsPath, http.StatusMethodNotAllowed},
+		{http.MethodPost, ownAddressPath, http.StatusMethodNotAllowed},
+		{http.MethodPost, statusJSONPath, http.StatusMethodNotAllowed},
+		{http.MethodPut, healthCheckPath, http.StatusMethodNotAllowed},
+		{http.MethodGet, writesNothingPath, http.StatusInternalServerError},
+		{http.MethodGet, panicsPath, http.StatusInternalServerError},
+	}
+
+	for _, tt := range tests {
+		checkAnswerCarriesMeta(t, s, httptest.NewRequestWithContext(
+			t.Context(), tt.method, tt.path, nil), tt.wantCode)
+	}
+
+	// A request whose time limit has already passed answers 504. The handlers
+	// write the answers of the first five routes, and the JSON check on the
+	// route writes the last.
+	pastTimeLimit, cancel := context.WithDeadline(t.Context(), time.Now())
+	defer cancel()
+
+	for _, path := range []string{
+		statusJSONPath, statsPath, "/ip/" + addrInTestPrefixV4,
+		"/api/v1/ip/" + addrInTestPrefixV4, asJSONPath, writesNothingPath,
+	} {
+		checkAnswerCarriesMeta(t, s, httptest.NewRequestWithContext(
+			pastTimeLimit, http.MethodGet, path, nil), http.StatusGatewayTimeout)
+	}
+
+	// With a store whose reads fail, the health check answers 503, and the
+	// handlers of the other routes 500.
+	failing := New(failingDB{}, newTestTable(),
+		streamer.New(logger.New(), metrics.New()), logger.New(), &config.Config{})
+	failing.resolver = &fakeResolver{}
+
+	checkAnswerCarriesMeta(t, failing, httptest.NewRequestWithContext(
+		t.Context(), http.MethodGet, healthCheckPath, nil),
+		http.StatusServiceUnavailable)
+
+	for _, path := range []string{
+		statusJSONPath, statsPath, asJSONPath,
+		"/api/v1/ip/" + addrInTestPrefixV4, "/ip/" + addrInTestPrefixV4,
+	} {
+		checkAnswerCarriesMeta(t, failing, httptest.NewRequestWithContext(
+			t.Context(), http.MethodGet, path, nil), http.StatusInternalServerError)
+	}
+}
+
+// checkAnswerCarriesMeta serves req through the server's router, and checks
+// that it answers wantCode with @meta and its three fields.
+func checkAnswerCarriesMeta(
+	t *testing.T, s *Server, req *http.Request, wantCode int,
+) {
+	t.Helper()
+
+	// The values README "API v1" gives the two fields that never change.
+	const (
+		wantTimeZone   = "UTC"
+		wantAPIVersion = 1
+	)
+
+	name := req.Method + " " + req.URL.String()
+
+	rec := httptest.NewRecorder()
+	s.router.ServeHTTP(rec, req)
+
+	if rec.Code != wantCode {
+		t.Errorf("%s: status %d, want %d; body %s", name, rec.Code, wantCode, rec.Body)
+	}
+
+	var answer map[string]any
+
+	err := json.Unmarshal(rec.Body.Bytes(), &answer)
+	if err != nil {
+		t.Errorf("%s: decoding the answer %q: %v", name, rec.Body, err)
+
+		return
+	}
+
+	meta, _ := answer[jsonKeyMeta].(map[string]any)
+	_, timeIsNumber := meta[metaKeyExecutionTimeMs].(float64)
+
+	if meta[metaKeyTimeZone] != wantTimeZone ||
+		meta[metaKeyAPIVersion] != float64(wantAPIVersion) || !timeIsNumber {
+		t.Errorf("%s: @meta %v, want time_zone %q, api_version %d and a "+
+			"number in execution_time_ms", name, meta, wantTimeZone, wantAPIVersion)
+	}
+}
+
+// stringsIn returns every string in a decoded JSON value, at any depth.
+func stringsIn(value any) []string {
+	var found []string
+
+	switch v := value.(type) {
+	case string:
+		found = append(found, v)
+	case []any:
+		for _, item := range v {
+			found = append(found, stringsIn(item)...)
+		}
+	case map[string]any:
+		for _, item := range v {
+			found = append(found, stringsIn(item)...)
+		}
+	}
+
+	return found
+}
+
 // TestPagesCarryTheCSPNonce checks that every script and style block of each
 // page carries the nonce its Content-Security-Policy header names, so that the
 // browser runs and applies them, that each answer has a nonce of its own, and

internal/server/routes.go

@@ -8,8 +8,8 @@ import (
 	"github.com/go-chi/chi/v5/middleware"
 )
 
-// The error messages the JSON routes under /api/v1 and /ip answer with when no
-// route matches the path, and when none takes the method.
+// The error messages the JSON routes answer with when no route matches the
+// path, and when the route does not take the method.
 const (
 	notFoundMessage         = "Not found"
 	methodNotAllowedMessage = "Method not allowed"
@@ -19,6 +19,13 @@ const (
 	jsonRoutesAllow = "GET, HEAD"
 )
 
+// The paths of the status figures and the health check, the two JSON routes
+// outside /api/v1 and /ip.
+const (
+	statusJSONPath  = "/status.json"
+	healthCheckPath = "/.well-known/healthcheck.json"
+)
+
 // setupRoutes configures the HTTP routes
 func (s *Server) setupRoutes() {
 	r := chi.NewRouter()
@@ -32,6 +39,8 @@ func (s *Server) setupRoutes() {
 	r.Use(middleware.RequestID)
 	r.Use(RealIPMiddleware(s.trustedProxies))
 	r.Use(RequestLoggerMiddleware(s.logger.Logger)) // Structured request logging
+	// Recoverer answers a panic on a page. JSONValidationMiddleware recovers a
+	// panic on a JSON route itself, so that the answer is JSON with @meta.
 	r.Use(middleware.Recoverer)
 	r.Use(JSONResponseMiddleware)
 	// Timeout must come after JSONResponseMiddleware, which sends its answer
@@ -43,11 +52,6 @@ func (s *Server) setupRoutes() {
 	// Routes
 	r.Get("/", s.handleIndex())
 	r.Get("/status", s.handleStatusHTML())
-	r.Get("/status.json", JSONValidationMiddleware(s.handleStatusJSON()).ServeHTTP)
-	r.Get(
-		"/.well-known/healthcheck.json",
-		JSONValidationMiddleware(s.handleHealthCheck()).ServeHTTP,
-	)
 
 	// AS and prefix detail pages
 	r.Get("/as/{asn}", s.handleASDetail())
@@ -70,6 +74,21 @@ func (s *Server) setupRoutes() {
 		s.writeJSONError(w, http.StatusMethodNotAllowed, methodNotAllowedMessage)
 	}
 
+	// The status figures and the health check. chi sets one 405 answer for a
+	// whole router. These two routes are on the pages' router, whose 405 stays
+	// chi's own. So each method they do not take is routed to the JSON 405
+	// here.
+	r.Get(statusJSONPath, JSONValidationMiddleware(s.handleStatusJSON()).ServeHTTP)
+	r.Get(healthCheckPath, JSONValidationMiddleware(s.handleHealthCheck()).ServeHTTP)
+
+	for _, method := range []string{
+		http.MethodPost, http.MethodPut, http.MethodPatch, http.MethodDelete,
+		http.MethodOptions, http.MethodTrace, http.MethodConnect,
+	} {
+		r.MethodFunc(method, statusJSONPath, jsonMethodNotAllowed)
+		r.MethodFunc(method, healthCheckPath, jsonMethodNotAllowed)
+	}
+
 	// IP info JSON endpoints (replaces old /ip redirect)
 	r.Route("/ip", func(r chi.Router) {
 		r.Use(JSONValidationMiddleware)

internal/server/routes_internal_test.go

@@ -17,7 +17,7 @@ func TestRoutesAnswerHEAD(t *testing.T) {
 
 	s := newServerWithTestRoutes(t)
 
-	for _, path := range []string{"/", statsPath, "/ip", "/ip/"} {
+	for _, path := range []string{"/", statusJSONPath, statsPath, "/ip", "/ip/"} {
 		rec := httptest.NewRecorder()
 		s.router.ServeHTTP(rec, httptest.NewRequestWithContext(
 			t.Context(), http.MethodHead, path, nil))
@@ -31,10 +31,13 @@ func TestRoutesAnswerHEAD(t *testing.T) {
 
 // TestJSONRoutesAnswerUnmatchedRequestsWithJSONErrors sends a method the JSON
 // routes do not take, and a path none of them matches, to each group of JSON
-// routes through the server's router. Each must answer with the JSON error
+// routes through the server's router. It also sends a method they do not take
+// to /status.json and the health check. Each must answer with the JSON error
 // body, and a 405 must name the methods the routes take in its Allow header.
 // Before the fix a 405 said "Internal server error" and a 404 was chi's plain
 // text answer (https://git.eeqj.de/sneak/routewatch/issues/111).
+// /status.json and the health check gave chi's empty 405
+// (https://git.eeqj.de/sneak/routewatch/issues/201).
 func TestJSONRoutesAnswerUnmatchedRequestsWithJSONErrors(t *testing.T) {
 	t.Parallel()
 
@@ -48,6 +51,14 @@ func TestJSONRoutesAnswerUnmatchedRequestsWithJSONErrors(t *testing.T) {
 	}{
 		{http.MethodPost, statsPath, http.StatusMethodNotAllowed, methodNotAllowedMessage},
 		{http.MethodPost, "/ip/", http.StatusMethodNotAllowed, methodNotAllowedMessage},
+		{
+			http.MethodDelete, statusJSONPath,
+			http.StatusMethodNotAllowed, methodNotAllowedMessage,
+		},
+		{
+			http.MethodOptions, healthCheckPath,
+			http.StatusMethodNotAllowed, methodNotAllowedMessage,
+		},
 		{http.MethodGet, "/api/v1/nothing", http.StatusNotFound, notFoundMessage},
 		{http.MethodGet, "/ip/192.0.2.1/nothing", http.StatusNotFound, notFoundMessage},
 	}

internal/templates/index.html

@@ -714,7 +714,8 @@
                 });
         });
 
-        // IP lookup
+        // IP lookup: show the whole JSON answer, its @meta and an error answer
+        // included, as the IP information API card does.
         document.getElementById('ip-form').addEventListener('submit', function(e) {
             e.preventDefault();
             const ip = document.getElementById('ip-input').value.trim();
@@ -730,18 +731,11 @@
 
             fetch('/ip/' + encodeURIComponent(ip))
                 .then(response => response.json())
-                .then(response => {
-                    contentEl.classList.remove('loading');
-                    if (response.status === 'error') {
-                        contentEl.className = 'error';
-                        contentEl.textContent = 'Error: ' + response.error.msg;
-                    } else {
-                        contentEl.className = '';
-                        contentEl.textContent = JSON.stringify(response.data, null, 2);
-                    }
+                .then(answer => {
+                    contentEl.className = '';
+                    contentEl.textContent = JSON.stringify(answer, null, 2);
                 })
                 .catch(error => {
-                    contentEl.classList.remove('loading');
                     contentEl.className = 'error';
                     contentEl.textContent = 'Error: ' + error.message;
                 });

internal/templates/status.html

@@ -401,6 +401,8 @@
         const REFRESH_PERIOD_MS = 2000;
         const STALE_AFTER_REFRESHES = 3;
         const MS_PER_SECOND = 1000;
+        const SECONDS_PER_MINUTE = 60;
+        const SECONDS_PER_HOUR = 3600;
         const SPINNER_FRAMES = ['⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧', '⠇', '⠏'];
         const SPINNER_COLOURS = ['#e74c3c', '#e67e22', '#f1c40f', '#27ae60', '#3498db', '#9b59b6'];
 
@@ -443,7 +445,18 @@
         function formatNumber(num) {
             return num.toLocaleString();
         }
-        
+
+        // formatDuration writes a number of seconds in hours, minutes and
+        // seconds, such as "1h 18m 34s" or "18.2s", with at most one decimal.
+        function formatDuration(totalSeconds) {
+            const hours = Math.floor(totalSeconds / SECONDS_PER_HOUR);
+            const minutes = Math.floor(totalSeconds % SECONDS_PER_HOUR / SECONDS_PER_MINUTE);
+            const seconds = parseFloat((totalSeconds % SECONDS_PER_MINUTE).toFixed(1));
+            if (hours > 0) return hours + 'h ' + minutes + 'm ' + seconds + 's';
+            if (minutes > 0) return minutes + 'm ' + seconds + 's';
+            return seconds + 's';
+        }
+
         function formatProcessingTime(ms) {
             if (ms < 0.001) {
                 return (ms * 1000).toFixed(0) + ' µs';
@@ -619,11 +632,13 @@
                     noteMessageCount(data.total_messages);
 
                     // Update all metrics
-                    document.getElementById('uptime').textContent = data.uptime;
+                    document.getElementById('uptime').textContent = formatDuration(data.uptime_seconds);
                     document.getElementById('go_version').textContent = data.go_version;
                     document.getElementById('goroutines').textContent = formatNumber(data.goroutines);
-                    document.getElementById('memory_usage').textContent = data.memory_usage;
-                    document.getElementById('connection_duration').textContent = data.connection_duration;
+                    document.getElementById('memory_usage').textContent = formatBytes(data.memory_usage_bytes);
+                    // connection_duration_seconds is null while the stream is not connected.
+                    document.getElementById('connection_duration').textContent =
+                        data.connection_duration_seconds === null ? 'disconnected' : formatDuration(data.connection_duration_seconds);
                     document.getElementById('reconnect_count').textContent = formatNumber(data.reconnect_count);
                     document.getElementById('total_messages').textContent = formatNumber(data.total_messages);
                     document.getElementById('messages_per_sec').textContent = formatNumber(Math.round(data.messages_per_sec));
@@ -672,7 +687,7 @@
                         const errorsEl = document.getElementById('whois_errors');
                         errorsEl.textContent = formatNumber(data.whois_stats.errors_last_hour);
                         errorsEl.className = 'metric-value' + (data.whois_stats.errors_last_hour > 0 ? ' disconnected' : '');
-                        document.getElementById('whois_interval').textContent = data.whois_stats.current_interval;
+                        document.getElementById('whois_interval').textContent = formatDuration(data.whois_stats.current_interval_seconds);
                     }
 
                     // Update handler stats