Make every clickable control look clickable, in two shared styles (closes #375)

Buttons keep btn-primary, btn-secondary and btn-danger and gain a
pointer cursor; the site name and the navigation links become
btn-secondary buttons. Every control that was plain coloured text
(Copy, both Add, the row actions, Resubmit, Replay, the back, footer
and download links) now uses btn-small, bordered at rest with hover
and focus states. Each card on the webhook list shows an Open label in
btn-small and takes its focus outline. Both styles are in
static/css/style.css, which the layout now loads.

The event log's clickable rows become buttons, so they work by
keyboard; Replay moves beside its delivery's row. Rows on the webhook
page and in the event log wrap at phone width. The browser test now
checks that Copy reads "Copied".

Model: opus-5-5

cmd/webhooker/main_test.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"sneak.berlin/go/webhooker/internal/config"
 	"sneak.berlin/go/webhooker/internal/datadir"
 	"sneak.berlin/go/webhooker/internal/resetpw"
 	"sneak.berlin/go/webhooker/internal/server"
@@ -36,6 +37,7 @@ const dockerStopGrace = 10 * time.Second
 // fx.New applies options before it executes invokes, so the timeout
 // is set whether or not the graph itself can be constructed here.
 func TestNewApp_StopTimeout(t *testing.T) {
+	config.ClearEnvForTest(t)
 	t.Setenv("DATA_DIR", t.TempDir())
 
 	got := newApp().StopTimeout()
@@ -73,6 +75,7 @@ func freePort(t *testing.T) int {
 // anything is built, and the run of logger.New, which happens before
 // the configuration sets the level.
 func TestNewApp_SendsFxEventsToTheLogger(t *testing.T) {
+	config.ClearEnvForTest(t)
 	t.Setenv("DATA_DIR", t.TempDir())
 	t.Setenv("PORT", strconv.Itoa(freePort(t)))
 	t.Setenv("DEBUG", "true")

internal/delivery/engine_integration_test.go

@@ -355,9 +355,14 @@ func TestProcessRetryTask_SuccessfulRetry(t *testing.T) {
 
 	s := newISetup(t)
 
+	var receivedBody string
+
 	ts := httptest.NewServer(
 		http.HandlerFunc(
-			func(w http.ResponseWriter, _ *http.Request) {
+			func(w http.ResponseWriter, r *http.Request) {
+				body, _ := io.ReadAll(r.Body)
+				receivedBody = string(body)
+
 				w.WriteHeader(http.StatusOK)
 			},
 		),
@@ -397,6 +402,8 @@ func TestProcessRetryTask_SuccessfulRetry(t *testing.T) {
 		context.TODO(), &task,
 	)
 
+	assert.Equal(t, event.Body, receivedBody)
+
 	iAssertStatus(t, s.WebhookDB, d.ID,
 		database.DeliveryStatusDelivered,
 	)
@@ -443,9 +450,14 @@ func TestProcessRetryTask_LargeBody_FetchFromDB(
 
 	s := newISetup(t)
 
+	var receivedBody string
+
 	ts := httptest.NewServer(
 		http.HandlerFunc(
-			func(w http.ResponseWriter, _ *http.Request) {
+			func(w http.ResponseWriter, r *http.Request) {
+				body, _ := io.ReadAll(r.Body)
+				receivedBody = string(body)
+
 				w.WriteHeader(http.StatusOK)
 			},
 		),
@@ -482,6 +494,8 @@ func TestProcessRetryTask_LargeBody_FetchFromDB(
 		context.TODO(), &task,
 	)
 
+	assert.Equal(t, largeBody, receivedBody)
+
 	iAssertStatus(t, s.WebhookDB, d.ID,
 		database.DeliveryStatusDelivered,
 	)

internal/logfield/logfield_test.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"log/slog"
 	"strings"
+	"sync"
 	"testing"
 	"unicode/utf8"
 
@@ -18,15 +19,11 @@ import (
 // width.
 const budget = 64
 
-// sampleRunes is how many runes wide the values in the charge test
-// are. The handlers add a constant per field — a pair of quotes when
-// the value needs quoting — so the per-rune charge is only visible
-// once it is amortised over a run of them.
-const sampleRunes = 64
-
-// quotingSlack is that constant: the pair of quotes a handler adds to
-// a value that needs them and omits from one that does not.
-const quotingSlack = 2
+// batchRunes is how many consecutive code points the charge test logs
+// in one value from U+1000 up. Logging each of those on its own line
+// is too slow for the suite under the race detector; 4,096 at a time
+// is 271 batches, each logged on two lines, so 542 lines per handler.
+const batchRunes = 4096
 
 // newHandlers are the two handlers internal/logger can install. Time
 // is dropped so a line's width is a function of its value alone —
@@ -66,46 +63,48 @@ func renderedWidth(
 	return buf.Len()
 }
 
-// chargeTestRunes is the set of code points the charge test measures:
-// every rune in the first two planes' worth of the BMP that the
-// handlers are most likely to treat specially, the separators that
-// only slog's JSON handler escapes, and a stratified sample across
-// the rest of Unicode so the astral charge is exercised on more than
-// one hand-picked rune.
-func chargeTestRunes() []rune {
-	const (
-		denseCeiling = 0x800
-		stride       = 1021
-		surrogateLo  = 0xD800
-		surrogateHi  = 0xDFFF
-	)
-
-	var runes []rune
-
-	keep := func(r rune) {
-		if r >= surrogateLo && r <= surrogateHi {
-			return
+// emittedBytes is what a handler writes for the runes of s alone, in a
+// value that starts with prefix: the width of a line carrying prefix
+// and then s twice, less that of a line carrying prefix and s once.
+// Both values start the same way and hold the same runes, so the text
+// handler quotes both or neither, and the quotes cancel along with the
+// prefix and everything else on the line.
+func emittedBytes(
+	newHandler func(io.Writer) slog.Handler,
+	prefix, s string,
+) int {
+	return renderedWidth(newHandler, prefix+s+s) -
+		renderedWidth(newHandler, prefix+s)
 }
 
-		runes = append(runes, r)
+// firstUndercharged returns the first rune in s that the handler
+// writes in more bytes than EncodedBytes charges for it, and how many
+// runes in s are undercharged that way. It measures one rune per line,
+// in a value of that rune alone and again after a space, which makes
+// the text handler quote the value. The charge test calls it on the
+// code points below U+1000, and from there up only on a batch that has
+// already failed, to name the code points rather than just their range.
+func firstUndercharged(
+	newHandler func(io.Writer) slog.Handler,
+	s string,
+) (rune, int) {
+	first, count := rune(-1), 0
+
+	for _, r := range s {
+		charge := logfield.EncodedBytes(r)
+		if emittedBytes(newHandler, "", string(r)) <= charge &&
+			emittedBytes(newHandler, " ", string(r)) <= charge {
+			continue
 		}
 
-	for r := range rune(denseCeiling) {
-		keep(r)
+		if count == 0 {
+			first = r
 		}
 
-	for _, r := range []rune{
-		0x2028, 0x2029, 0x200B, 0x4E00, 0xE000, 0xFFFD,
-		0x1000C, 0x1F600, 0xE0001, 0x10FFFF,
-	} {
-		keep(r)
+		count++
 	}
 
-	for r := rune(denseCeiling); r <= utf8.MaxRune; r += stride {
-		keep(r)
-	}
-
-	return runes
+	return first, count
 }
 
 // TestEncodedBytes_ChargesAtLeastWhatTheHandlersEmit is the property
@@ -114,33 +113,93 @@ func chargeTestRunes() []rune {
 // how a stated ceiling becomes false without any test noticing, so
 // the charge is measured against what the handlers actually write
 // rather than against the escaping rules as read.
+//
+// Every code point below U+1000 is checked on its own, for both
+// handlers. That range holds the quote, the backslash and the control
+// characters the handlers escape, next to code points each handler
+// writes in fewer bytes than their charge, which in a sum would cover
+// a neighbour charged too little. Each is measured in a value of it
+// alone and again in one the text handler quotes, because that handler
+// writes U+007F as one raw byte in a value it leaves bare but as \x7f,
+// four bytes, in one it quotes.
+//
+// From U+1000 up the text handler writes every code point in exactly
+// its charge, so the rest of Unicode is checked batchRunes at a time:
+// each batch's summed charge must cover what the handler writes for
+// the whole batch. The sums there can miss the JSON handler alone
+// writing one code point in more bytes than its charge, when it writes
+// others in the same batch in fewer.
 func TestEncodedBytes_ChargesAtLeastWhatTheHandlersEmit(t *testing.T) {
 	t.Parallel()
 
+	var below strings.Builder
+	for r := range rune(0x1000) {
+		below.WriteRune(r)
+	}
+
+	var batches []string
+
+	for lo := rune(0x1000); lo <= utf8.MaxRune; lo += batchRunes {
+		var batch strings.Builder
+
+		for r := lo; r < lo+batchRunes; r++ {
+			// Surrogate halves are not runes a string can carry.
+			if utf8.ValidRune(r) {
+				batch.WriteRune(r)
+			}
+		}
+
+		batches = append(batches, batch.String())
+	}
+
+	// What EncodedBytes charges for each batch. Under -race -cover this
+	// takes longer than logging the batches, so it is worked out once,
+	// by whichever handler finishes logging first, while the other is
+	// still logging.
+	charged := sync.OnceValue(func() []int {
+		costs := make([]int, len(batches))
+
+		for i, batch := range batches {
+			for _, r := range batch {
+				costs[i] += logfield.EncodedBytes(r)
+			}
+		}
+
+		return costs
+	})
+
 	for name, newHandler := range newHandlers() {
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 
-			// 'a' is a printable ASCII rune, charged exactly one
-			// byte, so it is the zero point the other runes are
-			// measured against.
-			base := renderedWidth(
-				newHandler, strings.Repeat("a", sampleRunes),
+			if first, count := firstUndercharged(newHandler, below.String()); count > 0 {
+				t.Errorf(
+					"%d code points below U+1000 cost more than "+
+						"EncodedBytes charges, the first U+%04X",
+					count, first,
 				)
+			}
 
-			for _, r := range chargeTestRunes() {
-				got := renderedWidth(
-					newHandler,
-					strings.Repeat(string(r), sampleRunes),
+			emitted := make([]int, len(batches))
+			for i, batch := range batches {
+				emitted[i] = emittedBytes(newHandler, "", batch)
+			}
+
+			for i, cost := range charged() {
+				if emitted[i] <= cost {
+					continue
+				}
+
+				lo := rune(0x1000 + i*batchRunes)
+				first, count := firstUndercharged(
+					newHandler, batches[i],
 				)
-				charged := sampleRunes *
-					(logfield.EncodedBytes(r) - 1)
-
-				require.LessOrEqual(
-					t, got-base, charged+quotingSlack,
-					"U+%04X costs more on the line than "+
-						"EncodedBytes charges for it",
-					r,
+				t.Errorf(
+					"U+%04X to U+%04X emit %d bytes but are "+
+						"charged %d; %d of them cost more than "+
+						"EncodedBytes charges, the first U+%04X",
+					lo, lo+batchRunes-1, emitted[i], cost,
+					count, first,
 				)
 			}
 		})

internal/middleware/middleware.go

@@ -600,7 +600,10 @@ func bodyLimitedMethod(method string) bool {
 }
 
 // MaxBodySize returns middleware that limits the size of
-// POST/PUT/PATCH request bodies to maxBytes. It must be registered
+// POST/PUT/PATCH request bodies to maxBytes. A request with any other
+// method passes through uncapped, deliberately: no route behind it
+// reads a body on GET, HEAD or DELETE. A handler that starts to needs
+// its method added to bodyLimitedMethod first. It must be registered
 // before any middleware that parses the body — notably CSRF, which
 // calls r.PostFormValue — so that form parsing happens under this
 // cap rather than net/http's 10 MB default.

internal/middleware/middleware_test.go

@@ -730,10 +730,8 @@ func TestNoCache_SetsHeaders(t *testing.T) {
 
 const testBodyLimit int64 = 64
 
-// maxBodySizeHandler wraps a sentinel handler in MaxBodySize with
-// testBodyLimit. The sentinel records whether it ran and how much of
-// the body it managed to read, so tests can distinguish "never
-// reached" from "reached but truncated".
+// maxBodySizeResult is what runMaxBodySize's sentinel handler saw,
+// together with the response.
 type maxBodySizeResult struct {
 	called   bool
 	read     int
@@ -741,6 +739,10 @@ type maxBodySizeResult struct {
 	response *httptest.ResponseRecorder
 }
 
+// runMaxBodySize wraps a sentinel handler in MaxBodySize with
+// testBodyLimit and serves req through it. The sentinel records
+// whether it ran and how much of the body it managed to read, so
+// tests can distinguish "never reached" from "reached but truncated".
 func runMaxBodySize(
 	t *testing.T,
 	req *http.Request,

internal/server/error_page_test.go

@@ -191,7 +191,7 @@ func TestErrorPage_PanicOnAdminPage(t *testing.T) {
 
 	w := serve(
 		server.NewRouterWithPageProbeForTest(
-			env.log.Get(), env.cfg, env.mw, env.hnd,
+			t, env.log, env.cfg, env.mw, env.hnd,
 			true, panicProbeHandler,
 		),
 		server.PageProbePattern,
@@ -200,7 +200,7 @@ func TestErrorPage_PanicOnAdminPage(t *testing.T) {
 
 	w = serve(
 		server.NewRouterWithProbeForTest(
-			env.log.Get(), env.cfg, env.mw, env.hnd,
+			t, env.log, env.cfg, env.mw, env.hnd,
 			true, panicProbeHandler,
 		),
 		server.ProbePattern,

internal/server/export_test.go

@@ -1,13 +1,16 @@
 package server
 
 import (
-	"log/slog"
 	"net/http"
+	"testing"
 
 	"github.com/getsentry/sentry-go"
 	"github.com/go-chi/chi"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/fx/fxtest"
 	"sneak.berlin/go/webhooker/internal/config"
 	"sneak.berlin/go/webhooker/internal/handlers"
+	"sneak.berlin/go/webhooker/internal/logger"
 	"sneak.berlin/go/webhooker/internal/middleware"
 )
 
@@ -34,23 +37,45 @@ func SentryClientOptionsForTest(
 	return sentryClientOptions(dsn, release)
 }
 
+// newServerForTest builds a Server through New, as the application
+// does, on a lifecycle that is never started: the hooks New adds to
+// it never run, so nothing listens.
+func newServerForTest(
+	t *testing.T,
+	log *logger.Logger,
+	cfg *config.Config,
+	mw *middleware.Middleware,
+	h *handlers.Handlers,
+) *Server {
+	t.Helper()
+
+	s, err := New(fxtest.NewLifecycle(t), ServerParams{
+		Logger:     log,
+		Config:     cfg,
+		Middleware: mw,
+		Handlers:   h,
+	})
+	require.NoError(t, err)
+
+	return s
+}
+
 // NewRouterForTest builds the real route tree via SetupRoutes with
-// the supplied middleware and handlers, bypassing the fx lifecycle
-// and the HTTP listener. Tests use it so that route-group middleware
-// registration order is exercised exactly as it ships, rather than
-// against a hand-rebuilt chain that could drift from routes.go.
+// the supplied middleware and handlers, on a Server from New whose
+// lifecycle is never started, so no HTTP listener runs. Tests use it
+// so that route-group middleware registration order is exercised
+// exactly as it ships, rather than against a hand-rebuilt chain that
+// could drift from routes.go.
 func NewRouterForTest(
-	log *slog.Logger,
+	t *testing.T,
+	log *logger.Logger,
 	cfg *config.Config,
 	mw *middleware.Middleware,
 	h *handlers.Handlers,
 ) http.Handler {
-	s := &Server{
-		log:    log,
-		mw:     mw,
-		h:      h,
-		params: ServerParams{Config: cfg},
-	}
+	t.Helper()
+
+	s := newServerForTest(t, log, cfg, mw, h)
 	s.SetupRoutes()
 
 	return s.router
@@ -83,19 +108,17 @@ const ProbePattern = "/probe"
 // option and the recoverer registered outside it is the thing a test
 // has to be able to pin.
 func NewRouterWithProbeForTest(
-	log *slog.Logger,
+	t *testing.T,
+	log *logger.Logger,
 	cfg *config.Config,
 	mw *middleware.Middleware,
 	h *handlers.Handlers,
 	sentryEnabled bool,
 	probe http.HandlerFunc,
 ) http.Handler {
-	s := &Server{
-		log:    log,
-		mw:     mw,
-		h:      h,
-		params: ServerParams{Config: cfg},
-	}
+	t.Helper()
+
+	s := newServerForTest(t, log, cfg, mw, h)
 	s.sentryEnabled.Store(sentryEnabled)
 	s.SetupRoutes()
 	s.router.Handle(ProbePattern, probe)
@@ -113,19 +136,17 @@ const PageProbePattern = "/pages/probe"
 // it, so the probe runs behind that group's own middleware exactly as
 // the group's real routes do.
 func NewRouterWithPageProbeForTest(
-	log *slog.Logger,
+	t *testing.T,
+	log *logger.Logger,
 	cfg *config.Config,
 	mw *middleware.Middleware,
 	h *handlers.Handlers,
 	sentryEnabled bool,
 	probe http.HandlerFunc,
 ) http.Handler {
-	s := &Server{
-		log:    log,
-		mw:     mw,
-		h:      h,
-		params: ServerParams{Config: cfg},
-	}
+	t.Helper()
+
+	s := newServerForTest(t, log, cfg, mw, h)
 	s.sentryEnabled.Store(sentryEnabled)
 	s.SetupRoutes()
 

internal/server/recoverer_test.go

@@ -199,7 +199,7 @@ func TestPanicProbeChild(t *testing.T) {
 	env := newTestEnv(t)
 
 	router := server.NewRouterWithProbeForTest(
-		env.log.Get(), env.cfg, env.mw, env.hnd,
+		t, env.log, env.cfg, env.mw, env.hnd,
 		false, panicProbeHandler,
 	)
 
@@ -253,7 +253,7 @@ func TestSentryStillSeesAPanic(t *testing.T) {
 	require.NoError(t, err)
 
 	router := server.NewRouterWithProbeForTest(
-		env.log.Get(), env.cfg, env.mw, env.hnd,
+		t, env.log, env.cfg, env.mw, env.hnd,
 		true, panicProbeHandler,
 	)
 

internal/server/response_controller_test.go

@@ -67,11 +67,11 @@ func TestResponseControllerThroughProductionRouter(t *testing.T) {
 
 			routers := map[string]http.Handler{
 				server.ProbePattern: server.NewRouterWithProbeForTest(
-					env.log.Get(), env.cfg, env.mw, env.hnd,
+					t, env.log, env.cfg, env.mw, env.hnd,
 					tc.sentryEnabled, probe,
 				),
 				server.PageProbePattern: server.NewRouterWithPageProbeForTest(
-					env.log.Get(), env.cfg, env.mw, env.hnd,
+					t, env.log, env.cfg, env.mw, env.hnd,
 					tc.sentryEnabled, probe,
 				),
 			}

internal/server/routes_test.go

@@ -136,7 +136,7 @@ func newTestEnvWithConfig(
 	t.Cleanup(app.RequireStop)
 
 	return &testEnv{
-		router: server.NewRouterForTest(log.Get(), cfg, mw, hnd),
+		router: server.NewRouterForTest(t, log, cfg, mw, hnd),
 		sess:   sess,
 		db:     db,
 		dbMgr:  dbMgr,
@@ -531,6 +531,48 @@ func TestStaticServesOnlyGetAndHead(t *testing.T) {
 	}
 }
 
+// --- every page route group ---
+
+// TestPageRouteGroups_OversizeBody_RejectedBeforeCSRF pins the body
+// cap ahead of CSRF and RequireAuth in every page route group. The
+// requests carry no session and no CSRF token, so if either ran first
+// the answer would be a 403 or a redirect to the login page rather
+// than 413, and CSRF would issue its cookie (see
+// TestPagesLogin_UnderLimit_NoToken_CSRFRejects). /settings has no
+// POST route, but its group's middleware runs before the method is
+// matched, so a POST there still reaches CSRF's form parsing if the
+// cap moves after it. The user and webhook in the paths need not
+// exist: nothing after the cap runs.
+func TestPageRouteGroups_OversizeBody_RejectedBeforeCSRF(
+	t *testing.T,
+) {
+	t.Parallel()
+
+	env := newTestEnv(t)
+
+	form := url.Values{}
+	form.Set("name", oversizeValue())
+
+	for _, path := range []string{
+		"/pages/login",
+		"/user/nobody/password",
+		"/settings/",
+		"/hooks/new",
+		"/hook/nonexistent/edit",
+	} {
+		w := env.post(path, form, nil)
+
+		assert.Equal(
+			t, http.StatusRequestEntityTooLarge, w.Code, path,
+		)
+		assert.False(
+			t, csrfCookieSet(w),
+			"CSRF middleware must not run for an oversized body to %s",
+			path,
+		)
+	}
+}
+
 // --- /pages group ---
 
 // TestPagesLogin_OversizeBody_RejectedBeforeCSRF proves the cap runs
@@ -1610,7 +1652,7 @@ func TestTwoMetricsRoutersInOneProcess(t *testing.T) {
 	)
 	third := &testEnv{
 		router: server.NewRouterForTest(
-			first.log.Get(), first.cfg, first.mw, first.hnd,
+			t, first.log, first.cfg, first.mw, first.hnd,
 		),
 	}