Rename internal/proxy to internal/servewaf (closes #173)

The package passes nothing to an app since rproxy took that over, so it
is named after the command it serves. The rproxy tests call their
stand-in for servewaf standIn, since a local servewaf would hide the
package. No change of behaviour.

Model: opus-5-5

internal/rproxy/limits_test.go

@@ -16,9 +16,9 @@ import (
 	"time"
 
 	"sneak.berlin/go/smallwebwaf/internal/config"
-	"sneak.berlin/go/smallwebwaf/internal/proxy"
 	"sneak.berlin/go/smallwebwaf/internal/requestlog"
 	"sneak.berlin/go/smallwebwaf/internal/rproxy"
+	"sneak.berlin/go/smallwebwaf/internal/servewaf"
 )
 
 // post is the start of a POST whose headers end with what follows it.
@@ -71,11 +71,11 @@ func TestABodyAnnouncedOverItsLimitIsRefusedOnceServeWAFAllowsIt(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, allow)
+			standIn := startServeWAF(t, allow)
 			app := startApp(t, func(http.ResponseWriter, *http.Request) {
 				t.Error("the app was asked")
 			})
-			addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+			addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 				maxRequestSize: tc.limit,
 			})
 
@@ -85,11 +85,11 @@ func TestABodyAnnouncedOverItsLimitIsRefusedOnceServeWAFAllowsIt(t *testing.T) {
 				t.Errorf("answered %+v, want 413", got)
 			}
 
-			if asked := servewaf.question(t); len(asked.body) != tc.asked {
+			if asked := standIn.question(t); len(asked.body) != tc.asked {
 				t.Errorf("the question carries %d bytes, want %d", len(asked.body), tc.asked)
 			}
 
-			report := servewaf.report(t)
+			report := standIn.report(t)
 			if report.Status != http.StatusRequestEntityTooLarge {
 				t.Errorf("report %+v, want status 413", report)
 			}
@@ -100,9 +100,9 @@ func TestABodyAnnouncedOverItsLimitIsRefusedOnceServeWAFAllowsIt(t *testing.T) {
 func TestADenyOutranksTheBodySizeLimit(t *testing.T) {
 	t.Parallel()
 
-	servewaf := startServeWAF(t, deny)
+	standIn := startServeWAF(t, deny)
 	app := startApp(t, greet)
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxRequestSize: "1K",
 	})
 
@@ -132,12 +132,12 @@ func TestABodyNotAnnouncedOverItsLimitIsRefused(t *testing.T) {
 
 			var asked atomic.Bool
 
-			servewaf := startServeWAF(t, allow)
+			standIn := startServeWAF(t, allow)
 			app := startApp(t, func(w http.ResponseWriter, r *http.Request) {
 				asked.Store(true)
 				greet(w, r)
 			})
-			addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+			addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 				maxRequestSize: tc.limit,
 			})
 
@@ -165,12 +165,12 @@ func TestAResponseOverItsLimit(t *testing.T) {
 	t.Run("announced, is refused", func(t *testing.T) {
 		t.Parallel()
 
-		servewaf := startServeWAF(t, allow)
+		standIn := startServeWAF(t, allow)
 		app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 			w.Header().Set(contentLengthHeader, strconv.Itoa(len(large)))
 			_, _ = io.WriteString(w, large)
 		})
-		addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+		addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 			maxResponseSize: "1K",
 		})
 
@@ -179,7 +179,7 @@ func TestAResponseOverItsLimit(t *testing.T) {
 			t.Errorf("answered %d, want 502", got.status)
 		}
 
-		if report := servewaf.report(t); report.Status != http.StatusBadGateway {
+		if report := standIn.report(t); report.Status != http.StatusBadGateway {
 			t.Errorf("report %+v, want status 502", report)
 		}
 	})
@@ -187,13 +187,13 @@ func TestAResponseOverItsLimit(t *testing.T) {
 	t.Run("not announced, is cut off", func(t *testing.T) {
 		t.Parallel()
 
-		servewaf := startServeWAF(t, allow)
+		standIn := startServeWAF(t, allow)
 		app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 			_, _ = io.WriteString(w, large[:1])
 			_ = http.NewResponseController(w).Flush()
 			_, _ = io.WriteString(w, large[1:])
 		})
-		addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+		addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 			maxResponseSize: "1K",
 		})
 
@@ -205,7 +205,7 @@ func TestAResponseOverItsLimit(t *testing.T) {
 			t.Errorf("read %d bytes (%v), want the answer cut off", len(text), err)
 		}
 
-		report := servewaf.report(t)
+		report := standIn.report(t)
 		if report.Status != http.StatusOK || report.ResponseBytes > 1<<10 {
 			t.Errorf("report %+v, want status 200 and at most 1K of the answer", report)
 		}
@@ -217,11 +217,11 @@ func TestAHeadWhoseAnswerAnnouncesMoreThanTheResponseLimitIsPassedOn(t *testing.
 
 	const announced = "2048"
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 		w.Header().Set(contentLengthHeader, announced)
 	})
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxResponseSize: "1K",
 	})
 
@@ -240,9 +240,9 @@ func TestASettingOfOffSetsNoLimit(t *testing.T) {
 		t.Run(setting, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, allow)
+			standIn := startServeWAF(t, allow)
 			app := startApp(t, greet)
-			addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+			addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 				setting: "off",
 			})
 
@@ -251,7 +251,7 @@ func TestASettingOfOffSetsNoLimit(t *testing.T) {
 			wantGreeting(t, visit(t, newRequest(t, http.MethodPost, addr, "/",
 				strings.NewReader("a body"))))
 
-			if got := get(t, addr, proxy.HealthPath); got.status != http.StatusOK {
+			if got := get(t, addr, servewaf.HealthPath); got.status != http.StatusOK {
 				t.Errorf("answered %+v, want rproxy's own 200", got)
 			}
 		})
@@ -270,9 +270,9 @@ func TestAVisitorTooSlowToSendTheFirstPartIsAnswered408(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, allow)
+			standIn := startServeWAF(t, allow)
 			app := startApp(t, greet)
-			addr, out := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+			addr, out := startRProxy(t, standIn.URL, app.URL, map[string]string{
 				maxRequestTime: "500",
 			})
 
@@ -288,11 +288,11 @@ func TestAVisitorTooSlowToSendTheFirstPartIsAnswered408(t *testing.T) {
 				t.Errorf("line %v, want no disposition and 10 bytes", line)
 			}
 
-			if len(servewaf.questions) != 0 {
+			if len(standIn.questions) != 0 {
 				t.Error("servewaf was asked")
 			}
 
-			servewaf.wantNoReport(t)
+			standIn.wantNoReport(t)
 		})
 	}
 }
@@ -300,9 +300,9 @@ func TestAVisitorTooSlowToSendTheFirstPartIsAnswered408(t *testing.T) {
 func TestAVisitorThatGoesAwayBeforeTheFirstPartIsNotAsked(t *testing.T) {
 	t.Parallel()
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, greet)
-	addr, out := startRProxy(t, servewaf.URL, app.URL, nil)
+	addr, out := startRProxy(t, standIn.URL, app.URL, nil)
 
 	conn := dial(t, addr)
 	send(t, conn, post+announcedLength(100)+"some of it")
@@ -313,7 +313,7 @@ func TestAVisitorThatGoesAwayBeforeTheFirstPartIsNotAsked(t *testing.T) {
 		t.Errorf("line %v, want no answer and no disposition", line)
 	}
 
-	if len(servewaf.questions) != 0 {
+	if len(standIn.questions) != 0 {
 		t.Error("servewaf was asked")
 	}
 }
@@ -334,9 +334,9 @@ func TestABodyThatCannotBeReadClosesTheConnectionWithoutAnAnswer(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, allow)
+			standIn := startServeWAF(t, allow)
 			app := startApp(t, greet)
-			addr, out := startRProxy(t, servewaf.URL, app.URL, nil)
+			addr, out := startRProxy(t, standIn.URL, app.URL, nil)
 
 			conn := dial(t, addr)
 			send(t, conn, tc.request)
@@ -364,7 +364,7 @@ func TestABodyThatCannotBeReadClosesTheConnectionWithoutAnAnswer(t *testing.T) {
 				t.Errorf("line %v, want no answer and no disposition", line)
 			}
 
-			if len(servewaf.questions) != 0 {
+			if len(standIn.questions) != 0 {
 				t.Error("servewaf was asked")
 			}
 		})
@@ -404,11 +404,11 @@ func TestABodyLeftUnreadIsReadOnlyUntilTheRequestTimeLimit(t *testing.T) {
 		announced = 100 * questionBodyMaxBytes
 	)
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNoContent)
 	})
-	_, _, server := startServer(t, servewaf.URL, app.URL, map[string]string{
+	_, _, server := startServer(t, standIn.URL, app.URL, map[string]string{
 		maxRequestTime: strconv.FormatInt(limit.Milliseconds(), 10),
 	})
 
@@ -454,9 +454,9 @@ func TestAnAnswerRProxyGivesItselfHasTheResponseTimeToBeSent(t *testing.T) {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, deny)
+			standIn := startServeWAF(t, deny)
 			app := startApp(t, greet)
-			_, _, server := startServer(t, servewaf.URL, app.URL, map[string]string{
+			_, _, server := startServer(t, standIn.URL, app.URL, map[string]string{
 				maxResponseTime: strconv.FormatInt(limit.Milliseconds(), 10),
 			})
 
@@ -484,9 +484,9 @@ func TestAnAnswerRProxyGivesItselfHasTheResponseTimeToBeSent(t *testing.T) {
 func TestAVisitorTooSlowToSendTheRestIsAnswered408(t *testing.T) {
 	t.Parallel()
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, greet)
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxRequestTime: "3000",
 	})
 
@@ -498,11 +498,11 @@ func TestAVisitorTooSlowToSendTheRestIsAnswered408(t *testing.T) {
 		t.Errorf("status %d, want 408", status)
 	}
 
-	if asked := servewaf.question(t); len(asked.body) != questionBodyMaxBytes {
+	if asked := standIn.question(t); len(asked.body) != questionBodyMaxBytes {
 		t.Errorf("the question carries %d bytes", len(asked.body))
 	}
 
-	if report := servewaf.report(t); report.Status != http.StatusRequestTimeout {
+	if report := standIn.report(t); report.Status != http.StatusRequestTimeout {
 		t.Errorf("report %+v, want status 408", report)
 	}
 }
@@ -553,8 +553,8 @@ func TestAnAppTooSlowToTakeTheRequestIsAnswered504(t *testing.T) {
 		writeSize = 32 << 10
 	)
 
-	servewaf := startServeWAF(t, allow)
-	addr, _ := startRProxy(t, servewaf.URL, startAppThatTakesNothing(t),
+	standIn := startServeWAF(t, allow)
+	addr, _ := startRProxy(t, standIn.URL, startAppThatTakesNothing(t),
 		map[string]string{maxRequestTime: "3000"})
 
 	conn := dial(t, addr)
@@ -580,14 +580,14 @@ func TestAnAppTooSlowToAnswerIsAnswered504(t *testing.T) {
 	t.Parallel()
 
 	release := make(chan struct{})
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(http.ResponseWriter, *http.Request) {
 		<-release
 	})
 
 	t.Cleanup(func() { close(release) })
 
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxResponseTime: "300",
 	})
 
@@ -596,7 +596,7 @@ func TestAnAppTooSlowToAnswerIsAnswered504(t *testing.T) {
 		t.Errorf("answered %d, want 504", got.status)
 	}
 
-	if report := servewaf.report(t); report.Status != http.StatusGatewayTimeout {
+	if report := standIn.report(t); report.Status != http.StatusGatewayTimeout {
 		t.Errorf("report %+v, want status 504", report)
 	}
 }
@@ -607,7 +607,7 @@ func TestAnAppTooSlowToFinishItsAnswerIsCutOff(t *testing.T) {
 	const start = "the start"
 
 	release := make(chan struct{})
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 		_, _ = io.WriteString(w, start)
 		_ = http.NewResponseController(w).Flush()
@@ -619,7 +619,7 @@ func TestAnAppTooSlowToFinishItsAnswerIsCutOff(t *testing.T) {
 
 	// The time limit is long enough for a loaded host to pass on the start of the
 	// answer before it runs out.
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxResponseTime: "3000",
 	})
 
@@ -642,7 +642,7 @@ func TestAnAppTooSlowToFinishItsAnswerIsCutOff(t *testing.T) {
 			res.StatusCode, body, err, start)
 	}
 
-	if report := servewaf.report(t); report.Status != http.StatusOK {
+	if report := standIn.report(t); report.Status != http.StatusOK {
 		t.Errorf("report %+v, want the status the visitor got", report)
 	}
 }
@@ -656,7 +656,7 @@ func TestAVisitorTooSlowToTakeTheAnswerIsCutOff(t *testing.T) {
 		writeSize = 32 << 10
 	)
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 		part := make([]byte, writeSize)
 
@@ -669,7 +669,7 @@ func TestAVisitorTooSlowToTakeTheAnswerIsCutOff(t *testing.T) {
 	})
 	// The time limit is long enough for a loaded host to start passing on the
 	// answer before it runs out.
-	addr, out := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, out := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxResponseTime: "3000",
 	})
 
@@ -684,7 +684,7 @@ func TestAVisitorTooSlowToTakeTheAnswerIsCutOff(t *testing.T) {
 		t.Errorf("line %v, want status 200 and the answer cut off", line)
 	}
 
-	report := servewaf.report(t)
+	report := standIn.report(t)
 	if report.Status != http.StatusOK || report.ResponseBytes >= bodySize {
 		t.Errorf("report %+v, want status 200 and the answer cut off", report)
 	}
@@ -693,15 +693,15 @@ func TestAVisitorTooSlowToTakeTheAnswerIsCutOff(t *testing.T) {
 func TestAnAppThatCannotBeReachedIsAnswered502WithAReport(t *testing.T) {
 	t.Parallel()
 
-	servewaf := startServeWAF(t, allow)
-	addr, _ := startRProxy(t, servewaf.URL, nowhere, nil)
+	standIn := startServeWAF(t, allow)
+	addr, _ := startRProxy(t, standIn.URL, nowhere, nil)
 
 	got := get(t, addr, "/")
 	if got.status != http.StatusBadGateway {
 		t.Errorf("answered %d, want 502", got.status)
 	}
 
-	if report := servewaf.report(t); report.Status != http.StatusBadGateway {
+	if report := standIn.report(t); report.Status != http.StatusBadGateway {
 		t.Errorf("report %+v, want status 502", report)
 	}
 }
@@ -709,11 +709,11 @@ func TestAnAppThatCannotBeReachedIsAnswered502WithAReport(t *testing.T) {
 func TestAVisitorThatStopsSendingAfterTheAppHasAnsweredGetsTheAnswer(t *testing.T) {
 	t.Parallel()
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, _ *http.Request) {
 		_, _ = io.WriteString(w, greeting)
 	})
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxRequestTime: "3000",
 	})
 
@@ -732,12 +732,12 @@ func TestAVisitorThatStopsSendingWhileTheAppWorksGetsNoAnswer(t *testing.T) {
 	t.Parallel()
 
 	working := make(chan struct{})
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(_ http.ResponseWriter, r *http.Request) {
 		close(working)
 		<-r.Context().Done()
 	})
-	addr, out := startRProxy(t, servewaf.URL, app.URL, nil)
+	addr, out := startRProxy(t, standIn.URL, app.URL, nil)
 
 	conn := dial(t, addr)
 	send(t, conn, "GET / HTTP/1.1\r\nHost: site.example\r\n\r\n")
@@ -773,7 +773,7 @@ func TestTheRequestTimeLimitDoesNotCutAnAnswerOnceTheAppHasTheRequest(t *testing
 
 	const answer = "the end of a long answer"
 
-	servewaf := startServeWAF(t, allow)
+	standIn := startServeWAF(t, allow)
 	app := startApp(t, func(w http.ResponseWriter, r *http.Request) {
 		_, _ = io.Copy(io.Discard, r.Body)
 		_ = http.NewResponseController(w).Flush()
@@ -782,7 +782,7 @@ func TestTheRequestTimeLimitDoesNotCutAnAnswerOnceTheAppHasTheRequest(t *testing
 
 		_, _ = io.WriteString(w, answer)
 	})
-	addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+	addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 		maxRequestTime: "2000",
 	})
 
@@ -802,18 +802,18 @@ func TestAVisitorThatStopsSendingGetsAnAnswerRProxyGivesByTheDeadline(t *testing
 		{"a deny", post, http.StatusForbidden},
 		{
 			"the health check",
-			"GET " + proxy.HealthPath + " HTTP/1.1\r\nHost: site.example\r\n",
+			"GET " + servewaf.HealthPath + " HTTP/1.1\r\nHost: site.example\r\n",
 			http.StatusOK,
 		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
 
-			servewaf := startServeWAF(t, deny)
+			standIn := startServeWAF(t, deny)
 			app := startApp(t, greet)
 			// The time limit is long enough for a loaded host to read the first part of
 			// the body before it runs out.
-			addr, _ := startRProxy(t, servewaf.URL, app.URL, map[string]string{
+			addr, _ := startRProxy(t, standIn.URL, app.URL, map[string]string{
 				maxRequestTime: "3000",
 			})