summaryrefslogtreecommitdiff
path: root/vendor/golang.org/x/net/http2/server_push_test.go
blob: 918fd30dc4d5537b3410d3297d28013623113cb9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build go1.8

package http2

import (
	"errors"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"reflect"
	"strconv"
	"sync"
	"testing"
	"time"
)

func TestServer_Push_Success(t *testing.T) {
	const (
		mainBody   = "<html>index page</html>"
		pushedBody = "<html>pushed page</html>"
		userAgent  = "testagent"
		cookie     = "testcookie"
	)

	var stURL string
	checkPromisedReq := func(r *http.Request, wantMethod string, wantH http.Header) error {
		if got, want := r.Method, wantMethod; got != want {
			return fmt.Errorf("promised Req.Method=%q, want %q", got, want)
		}
		if got, want := r.Header, wantH; !reflect.DeepEqual(got, want) {
			return fmt.Errorf("promised Req.Header=%q, want %q", got, want)
		}
		if got, want := "https://"+r.Host, stURL; got != want {
			return fmt.Errorf("promised Req.Host=%q, want %q", got, want)
		}
		if r.Body == nil {
			return fmt.Errorf("nil Body")
		}
		if buf, err := ioutil.ReadAll(r.Body); err != nil || len(buf) != 0 {
			return fmt.Errorf("ReadAll(Body)=%q,%v, want '',nil", buf, err)
		}
		return nil
	}

	errc := make(chan error, 3)
	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.RequestURI() {
		case "/":
			// Push "/pushed?get" as a GET request, using an absolute URL.
			opt := &http.PushOptions{
				Header: http.Header{
					"User-Agent": {userAgent},
				},
			}
			if err := w.(http.Pusher).Push(stURL+"/pushed?get", opt); err != nil {
				errc <- fmt.Errorf("error pushing /pushed?get: %v", err)
				return
			}
			// Push "/pushed?head" as a HEAD request, using a path.
			opt = &http.PushOptions{
				Method: "HEAD",
				Header: http.Header{
					"User-Agent": {userAgent},
					"Cookie":     {cookie},
				},
			}
			if err := w.(http.Pusher).Push("/pushed?head", opt); err != nil {
				errc <- fmt.Errorf("error pushing /pushed?head: %v", err)
				return
			}
			w.Header().Set("Content-Type", "text/html")
			w.Header().Set("Content-Length", strconv.Itoa(len(mainBody)))
			w.WriteHeader(200)
			io.WriteString(w, mainBody)
			errc <- nil

		case "/pushed?get":
			wantH := http.Header{}
			wantH.Set("User-Agent", userAgent)
			if err := checkPromisedReq(r, "GET", wantH); err != nil {
				errc <- fmt.Errorf("/pushed?get: %v", err)
				return
			}
			w.Header().Set("Content-Type", "text/html")
			w.Header().Set("Content-Length", strconv.Itoa(len(pushedBody)))
			w.WriteHeader(200)
			io.WriteString(w, pushedBody)
			errc <- nil

		case "/pushed?head":
			wantH := http.Header{}
			wantH.Set("User-Agent", userAgent)
			wantH.Set("Cookie", cookie)
			if err := checkPromisedReq(r, "HEAD", wantH); err != nil {
				errc <- fmt.Errorf("/pushed?head: %v", err)
				return
			}
			w.WriteHeader(204)
			errc <- nil

		default:
			errc <- fmt.Errorf("unknown RequestURL %q", r.URL.RequestURI())
		}
	})
	stURL = st.ts.URL

	// Send one request, which should push two responses.
	st.greet()
	getSlash(st)
	for k := 0; k < 3; k++ {
		select {
		case <-time.After(2 * time.Second):
			t.Errorf("timeout waiting for handler %d to finish", k)
		case err := <-errc:
			if err != nil {
				t.Fatal(err)
			}
		}
	}

	checkPushPromise := func(f Frame, promiseID uint32, wantH [][2]string) error {
		pp, ok := f.(*PushPromiseFrame)
		if !ok {
			return fmt.Errorf("got a %T; want *PushPromiseFrame", f)
		}
		if !pp.HeadersEnded() {
			return fmt.Errorf("want END_HEADERS flag in PushPromiseFrame")
		}
		if got, want := pp.PromiseID, promiseID; got != want {
			return fmt.Errorf("got PromiseID %v; want %v", got, want)
		}
		gotH := st.decodeHeader(pp.HeaderBlockFragment())
		if !reflect.DeepEqual(gotH, wantH) {
			return fmt.Errorf("got promised headers %v; want %v", gotH, wantH)
		}
		return nil
	}
	checkHeaders := func(f Frame, wantH [][2]string) error {
		hf, ok := f.(*HeadersFrame)
		if !ok {
			return fmt.Errorf("got a %T; want *HeadersFrame", f)
		}
		gotH := st.decodeHeader(hf.HeaderBlockFragment())
		if !reflect.DeepEqual(gotH, wantH) {
			return fmt.Errorf("got response headers %v; want %v", gotH, wantH)
		}
		return nil
	}
	checkData := func(f Frame, wantData string) error {
		df, ok := f.(*DataFrame)
		if !ok {
			return fmt.Errorf("got a %T; want *DataFrame", f)
		}
		if gotData := string(df.Data()); gotData != wantData {
			return fmt.Errorf("got response data %q; want %q", gotData, wantData)
		}
		return nil
	}

	// Stream 1 has 2 PUSH_PROMISE + HEADERS + DATA
	// Stream 2 has HEADERS + DATA
	// Stream 4 has HEADERS
	expected := map[uint32][]func(Frame) error{
		1: {
			func(f Frame) error {
				return checkPushPromise(f, 2, [][2]string{
					{":method", "GET"},
					{":scheme", "https"},
					{":authority", st.ts.Listener.Addr().String()},
					{":path", "/pushed?get"},
					{"user-agent", userAgent},
				})
			},
			func(f Frame) error {
				return checkPushPromise(f, 4, [][2]string{
					{":method", "HEAD"},
					{":scheme", "https"},
					{":authority", st.ts.Listener.Addr().String()},
					{":path", "/pushed?head"},
					{"cookie", cookie},
					{"user-agent", userAgent},
				})
			},
			func(f Frame) error {
				return checkHeaders(f, [][2]string{
					{":status", "200"},
					{"content-type", "text/html"},
					{"content-length", strconv.Itoa(len(mainBody))},
				})
			},
			func(f Frame) error {
				return checkData(f, mainBody)
			},
		},
		2: {
			func(f Frame) error {
				return checkHeaders(f, [][2]string{
					{":status", "200"},
					{"content-type", "text/html"},
					{"content-length", strconv.Itoa(len(pushedBody))},
				})
			},
			func(f Frame) error {
				return checkData(f, pushedBody)
			},
		},
		4: {
			func(f Frame) error {
				return checkHeaders(f, [][2]string{
					{":status", "204"},
				})
			},
		},
	}

	consumed := map[uint32]int{}
	for k := 0; len(expected) > 0; k++ {
		f, err := st.readFrame()
		if err != nil {
			for id, left := range expected {
				t.Errorf("stream %d: missing %d frames", id, len(left))
			}
			t.Fatalf("readFrame %d: %v", k, err)
		}
		id := f.Header().StreamID
		label := fmt.Sprintf("stream %d, frame %d", id, consumed[id])
		if len(expected[id]) == 0 {
			t.Fatalf("%s: unexpected frame %#+v", label, f)
		}
		check := expected[id][0]
		expected[id] = expected[id][1:]
		if len(expected[id]) == 0 {
			delete(expected, id)
		}
		if err := check(f); err != nil {
			t.Fatalf("%s: %v", label, err)
		}
		consumed[id]++
	}
}

func TestServer_Push_SuccessNoRace(t *testing.T) {
	// Regression test for issue #18326. Ensure the request handler can mutate
	// pushed request headers without racing with the PUSH_PROMISE write.
	errc := make(chan error, 2)
	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.RequestURI() {
		case "/":
			opt := &http.PushOptions{
				Header: http.Header{"User-Agent": {"testagent"}},
			}
			if err := w.(http.Pusher).Push("/pushed", opt); err != nil {
				errc <- fmt.Errorf("error pushing: %v", err)
				return
			}
			w.WriteHeader(200)
			errc <- nil

		case "/pushed":
			// Update request header, ensure there is no race.
			r.Header.Set("User-Agent", "newagent")
			r.Header.Set("Cookie", "cookie")
			w.WriteHeader(200)
			errc <- nil

		default:
			errc <- fmt.Errorf("unknown RequestURL %q", r.URL.RequestURI())
		}
	})

	// Send one request, which should push one response.
	st.greet()
	getSlash(st)
	for k := 0; k < 2; k++ {
		select {
		case <-time.After(2 * time.Second):
			t.Errorf("timeout waiting for handler %d to finish", k)
		case err := <-errc:
			if err != nil {
				t.Fatal(err)
			}
		}
	}
}

func TestServer_Push_RejectRecursivePush(t *testing.T) {
	// Expect two requests, but might get three if there's a bug and the second push succeeds.
	errc := make(chan error, 3)
	handler := func(w http.ResponseWriter, r *http.Request) error {
		baseURL := "https://" + r.Host
		switch r.URL.Path {
		case "/":
			if err := w.(http.Pusher).Push(baseURL+"/push1", nil); err != nil {
				return fmt.Errorf("first Push()=%v, want nil", err)
			}
			return nil

		case "/push1":
			if got, want := w.(http.Pusher).Push(baseURL+"/push2", nil), ErrRecursivePush; got != want {
				return fmt.Errorf("Push()=%v, want %v", got, want)
			}
			return nil

		default:
			return fmt.Errorf("unexpected path: %q", r.URL.Path)
		}
	}
	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		errc <- handler(w, r)
	})
	defer st.Close()
	st.greet()
	getSlash(st)
	if err := <-errc; err != nil {
		t.Errorf("First request failed: %v", err)
	}
	if err := <-errc; err != nil {
		t.Errorf("Second request failed: %v", err)
	}
}

func testServer_Push_RejectSingleRequest(t *testing.T, doPush func(http.Pusher, *http.Request) error, settings ...Setting) {
	// Expect one request, but might get two if there's a bug and the push succeeds.
	errc := make(chan error, 2)
	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		errc <- doPush(w.(http.Pusher), r)
	})
	defer st.Close()
	st.greet()
	if err := st.fr.WriteSettings(settings...); err != nil {
		st.t.Fatalf("WriteSettings: %v", err)
	}
	st.wantSettingsAck()
	getSlash(st)
	if err := <-errc; err != nil {
		t.Error(err)
	}
	// Should not get a PUSH_PROMISE frame.
	hf := st.wantHeaders()
	if !hf.StreamEnded() {
		t.Error("stream should end after headers")
	}
}

func TestServer_Push_RejectIfDisabled(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if got, want := p.Push("https://"+r.Host+"/pushed", nil), http.ErrNotSupported; got != want {
				return fmt.Errorf("Push()=%v, want %v", got, want)
			}
			return nil
		},
		Setting{SettingEnablePush, 0})
}

func TestServer_Push_RejectWhenNoConcurrentStreams(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if got, want := p.Push("https://"+r.Host+"/pushed", nil), ErrPushLimitReached; got != want {
				return fmt.Errorf("Push()=%v, want %v", got, want)
			}
			return nil
		},
		Setting{SettingMaxConcurrentStreams, 0})
}

func TestServer_Push_RejectWrongScheme(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if err := p.Push("http://"+r.Host+"/pushed", nil); err == nil {
				return errors.New("Push() should have failed (push target URL is http)")
			}
			return nil
		})
}

func TestServer_Push_RejectMissingHost(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if err := p.Push("https:pushed", nil); err == nil {
				return errors.New("Push() should have failed (push target URL missing host)")
			}
			return nil
		})
}

func TestServer_Push_RejectRelativePath(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if err := p.Push("../test", nil); err == nil {
				return errors.New("Push() should have failed (push target is a relative path)")
			}
			return nil
		})
}

func TestServer_Push_RejectForbiddenMethod(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			if err := p.Push("https://"+r.Host+"/pushed", &http.PushOptions{Method: "POST"}); err == nil {
				return errors.New("Push() should have failed (cannot promise a POST)")
			}
			return nil
		})
}

func TestServer_Push_RejectForbiddenHeader(t *testing.T) {
	testServer_Push_RejectSingleRequest(t,
		func(p http.Pusher, r *http.Request) error {
			header := http.Header{
				"Content-Length":   {"10"},
				"Content-Encoding": {"gzip"},
				"Trailer":          {"Foo"},
				"Te":               {"trailers"},
				"Host":             {"test.com"},
				":authority":       {"test.com"},
			}
			if err := p.Push("https://"+r.Host+"/pushed", &http.PushOptions{Header: header}); err == nil {
				return errors.New("Push() should have failed (forbidden headers)")
			}
			return nil
		})
}

func TestServer_Push_StateTransitions(t *testing.T) {
	const body = "foo"

	gotPromise := make(chan bool)
	finishedPush := make(chan bool)

	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.RequestURI() {
		case "/":
			if err := w.(http.Pusher).Push("/pushed", nil); err != nil {
				t.Errorf("Push error: %v", err)
			}
			// Don't finish this request until the push finishes so we don't
			// nondeterministically interleave output frames with the push.
			<-finishedPush
		case "/pushed":
			<-gotPromise
		}
		w.Header().Set("Content-Type", "text/html")
		w.Header().Set("Content-Length", strconv.Itoa(len(body)))
		w.WriteHeader(200)
		io.WriteString(w, body)
	})
	defer st.Close()

	st.greet()
	if st.stream(2) != nil {
		t.Fatal("stream 2 should be empty")
	}
	if got, want := st.streamState(2), stateIdle; got != want {
		t.Fatalf("streamState(2)=%v, want %v", got, want)
	}
	getSlash(st)
	// After the PUSH_PROMISE is sent, the stream should be stateHalfClosedRemote.
	st.wantPushPromise()
	if got, want := st.streamState(2), stateHalfClosedRemote; got != want {
		t.Fatalf("streamState(2)=%v, want %v", got, want)
	}
	// We stall the HTTP handler for "/pushed" until the above check. If we don't
	// stall the handler, then the handler might write HEADERS and DATA and finish
	// the stream before we check st.streamState(2) -- should that happen, we'll
	// see stateClosed and fail the above check.
	close(gotPromise)
	st.wantHeaders()
	if df := st.wantData(); !df.StreamEnded() {
		t.Fatal("expected END_STREAM flag on DATA")
	}
	if got, want := st.streamState(2), stateClosed; got != want {
		t.Fatalf("streamState(2)=%v, want %v", got, want)
	}
	close(finishedPush)
}

func TestServer_Push_RejectAfterGoAway(t *testing.T) {
	var readyOnce sync.Once
	ready := make(chan struct{})
	errc := make(chan error, 2)
	st := newServerTester(t, func(w http.ResponseWriter, r *http.Request) {
		select {
		case <-ready:
		case <-time.After(5 * time.Second):
			errc <- fmt.Errorf("timeout waiting for GOAWAY to be processed")
		}
		if got, want := w.(http.Pusher).Push("https://"+r.Host+"/pushed", nil), http.ErrNotSupported; got != want {
			errc <- fmt.Errorf("Push()=%v, want %v", got, want)
		}
		errc <- nil
	})
	defer st.Close()
	st.greet()
	getSlash(st)

	// Send GOAWAY and wait for it to be processed.
	st.fr.WriteGoAway(1, ErrCodeNo, nil)
	go func() {
		for {
			select {
			case <-ready:
				return
			default:
			}
			st.sc.serveMsgCh <- func(loopNum int) {
				if !st.sc.pushEnabled {
					readyOnce.Do(func() { close(ready) })
				}
			}
		}
	}()
	if err := <-errc; err != nil {
		t.Error(err)
	}
}