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repo-template/vendor/golang.org/x/net/http2/frame_test.go

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2018-02-07 09:03:05 +00:00
// Copyright 2014 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.
package http2
import (
"bytes"
"fmt"
"io"
"reflect"
"strings"
"testing"
"unsafe"
"golang.org/x/net/http2/hpack"
)
func testFramer() (*Framer, *bytes.Buffer) {
buf := new(bytes.Buffer)
return NewFramer(buf, buf), buf
}
func TestFrameSizes(t *testing.T) {
// Catch people rearranging the FrameHeader fields.
if got, want := int(unsafe.Sizeof(FrameHeader{})), 12; got != want {
t.Errorf("FrameHeader size = %d; want %d", got, want)
}
}
func TestFrameTypeString(t *testing.T) {
tests := []struct {
ft FrameType
want string
}{
{FrameData, "DATA"},
{FramePing, "PING"},
{FrameGoAway, "GOAWAY"},
{0xf, "UNKNOWN_FRAME_TYPE_15"},
}
for i, tt := range tests {
got := tt.ft.String()
if got != tt.want {
t.Errorf("%d. String(FrameType %d) = %q; want %q", i, int(tt.ft), got, tt.want)
}
}
}
func TestWriteRST(t *testing.T) {
fr, buf := testFramer()
var streamID uint32 = 1<<24 + 2<<16 + 3<<8 + 4
var errCode uint32 = 7<<24 + 6<<16 + 5<<8 + 4
fr.WriteRSTStream(streamID, ErrCode(errCode))
const wantEnc = "\x00\x00\x04\x03\x00\x01\x02\x03\x04\x07\x06\x05\x04"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
want := &RSTStreamFrame{
FrameHeader: FrameHeader{
valid: true,
Type: 0x3,
Flags: 0x0,
Length: 0x4,
StreamID: 0x1020304,
},
ErrCode: 0x7060504,
}
if !reflect.DeepEqual(f, want) {
t.Errorf("parsed back %#v; want %#v", f, want)
}
}
func TestWriteData(t *testing.T) {
fr, buf := testFramer()
var streamID uint32 = 1<<24 + 2<<16 + 3<<8 + 4
data := []byte("ABC")
fr.WriteData(streamID, true, data)
const wantEnc = "\x00\x00\x03\x00\x01\x01\x02\x03\x04ABC"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
df, ok := f.(*DataFrame)
if !ok {
t.Fatalf("got %T; want *DataFrame", f)
}
if !bytes.Equal(df.Data(), data) {
t.Errorf("got %q; want %q", df.Data(), data)
}
if f.Header().Flags&1 == 0 {
t.Errorf("didn't see END_STREAM flag")
}
}
func TestWriteDataPadded(t *testing.T) {
tests := [...]struct {
streamID uint32
endStream bool
data []byte
pad []byte
wantHeader FrameHeader
}{
// Unpadded:
0: {
streamID: 1,
endStream: true,
data: []byte("foo"),
pad: nil,
wantHeader: FrameHeader{
Type: FrameData,
Flags: FlagDataEndStream,
Length: 3,
StreamID: 1,
},
},
// Padded bit set, but no padding:
1: {
streamID: 1,
endStream: true,
data: []byte("foo"),
pad: []byte{},
wantHeader: FrameHeader{
Type: FrameData,
Flags: FlagDataEndStream | FlagDataPadded,
Length: 4,
StreamID: 1,
},
},
// Padded bit set, with padding:
2: {
streamID: 1,
endStream: false,
data: []byte("foo"),
pad: []byte{0, 0, 0},
wantHeader: FrameHeader{
Type: FrameData,
Flags: FlagDataPadded,
Length: 7,
StreamID: 1,
},
},
}
for i, tt := range tests {
fr, _ := testFramer()
fr.WriteDataPadded(tt.streamID, tt.endStream, tt.data, tt.pad)
f, err := fr.ReadFrame()
if err != nil {
t.Errorf("%d. ReadFrame: %v", i, err)
continue
}
got := f.Header()
tt.wantHeader.valid = true
if got != tt.wantHeader {
t.Errorf("%d. read %+v; want %+v", i, got, tt.wantHeader)
continue
}
df := f.(*DataFrame)
if !bytes.Equal(df.Data(), tt.data) {
t.Errorf("%d. got %q; want %q", i, df.Data(), tt.data)
}
}
}
func TestWriteHeaders(t *testing.T) {
tests := []struct {
name string
p HeadersFrameParam
wantEnc string
wantFrame *HeadersFrame
}{
{
"basic",
HeadersFrameParam{
StreamID: 42,
BlockFragment: []byte("abc"),
Priority: PriorityParam{},
},
"\x00\x00\x03\x01\x00\x00\x00\x00*abc",
&HeadersFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: 42,
Type: FrameHeaders,
Length: uint32(len("abc")),
},
Priority: PriorityParam{},
headerFragBuf: []byte("abc"),
},
},
{
"basic + end flags",
HeadersFrameParam{
StreamID: 42,
BlockFragment: []byte("abc"),
EndStream: true,
EndHeaders: true,
Priority: PriorityParam{},
},
"\x00\x00\x03\x01\x05\x00\x00\x00*abc",
&HeadersFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: 42,
Type: FrameHeaders,
Flags: FlagHeadersEndStream | FlagHeadersEndHeaders,
Length: uint32(len("abc")),
},
Priority: PriorityParam{},
headerFragBuf: []byte("abc"),
},
},
{
"with padding",
HeadersFrameParam{
StreamID: 42,
BlockFragment: []byte("abc"),
EndStream: true,
EndHeaders: true,
PadLength: 5,
Priority: PriorityParam{},
},
"\x00\x00\t\x01\r\x00\x00\x00*\x05abc\x00\x00\x00\x00\x00",
&HeadersFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: 42,
Type: FrameHeaders,
Flags: FlagHeadersEndStream | FlagHeadersEndHeaders | FlagHeadersPadded,
Length: uint32(1 + len("abc") + 5), // pad length + contents + padding
},
Priority: PriorityParam{},
headerFragBuf: []byte("abc"),
},
},
{
"with priority",
HeadersFrameParam{
StreamID: 42,
BlockFragment: []byte("abc"),
EndStream: true,
EndHeaders: true,
PadLength: 2,
Priority: PriorityParam{
StreamDep: 15,
Exclusive: true,
Weight: 127,
},
},
"\x00\x00\v\x01-\x00\x00\x00*\x02\x80\x00\x00\x0f\u007fabc\x00\x00",
&HeadersFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: 42,
Type: FrameHeaders,
Flags: FlagHeadersEndStream | FlagHeadersEndHeaders | FlagHeadersPadded | FlagHeadersPriority,
Length: uint32(1 + 5 + len("abc") + 2), // pad length + priority + contents + padding
},
Priority: PriorityParam{
StreamDep: 15,
Exclusive: true,
Weight: 127,
},
headerFragBuf: []byte("abc"),
},
},
{
"with priority stream dep zero", // golang.org/issue/15444
HeadersFrameParam{
StreamID: 42,
BlockFragment: []byte("abc"),
EndStream: true,
EndHeaders: true,
PadLength: 2,
Priority: PriorityParam{
StreamDep: 0,
Exclusive: true,
Weight: 127,
},
},
"\x00\x00\v\x01-\x00\x00\x00*\x02\x80\x00\x00\x00\u007fabc\x00\x00",
&HeadersFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: 42,
Type: FrameHeaders,
Flags: FlagHeadersEndStream | FlagHeadersEndHeaders | FlagHeadersPadded | FlagHeadersPriority,
Length: uint32(1 + 5 + len("abc") + 2), // pad length + priority + contents + padding
},
Priority: PriorityParam{
StreamDep: 0,
Exclusive: true,
Weight: 127,
},
headerFragBuf: []byte("abc"),
},
},
}
for _, tt := range tests {
fr, buf := testFramer()
if err := fr.WriteHeaders(tt.p); err != nil {
t.Errorf("test %q: %v", tt.name, err)
continue
}
if buf.String() != tt.wantEnc {
t.Errorf("test %q: encoded %q; want %q", tt.name, buf.Bytes(), tt.wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Errorf("test %q: failed to read the frame back: %v", tt.name, err)
continue
}
if !reflect.DeepEqual(f, tt.wantFrame) {
t.Errorf("test %q: mismatch.\n got: %#v\nwant: %#v\n", tt.name, f, tt.wantFrame)
}
}
}
func TestWriteInvalidStreamDep(t *testing.T) {
fr, _ := testFramer()
err := fr.WriteHeaders(HeadersFrameParam{
StreamID: 42,
Priority: PriorityParam{
StreamDep: 1 << 31,
},
})
if err != errDepStreamID {
t.Errorf("header error = %v; want %q", err, errDepStreamID)
}
err = fr.WritePriority(2, PriorityParam{StreamDep: 1 << 31})
if err != errDepStreamID {
t.Errorf("priority error = %v; want %q", err, errDepStreamID)
}
}
func TestWriteContinuation(t *testing.T) {
const streamID = 42
tests := []struct {
name string
end bool
frag []byte
wantFrame *ContinuationFrame
}{
{
"not end",
false,
[]byte("abc"),
&ContinuationFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: streamID,
Type: FrameContinuation,
Length: uint32(len("abc")),
},
headerFragBuf: []byte("abc"),
},
},
{
"end",
true,
[]byte("def"),
&ContinuationFrame{
FrameHeader: FrameHeader{
valid: true,
StreamID: streamID,
Type: FrameContinuation,
Flags: FlagContinuationEndHeaders,
Length: uint32(len("def")),
},
headerFragBuf: []byte("def"),
},
},
}
for _, tt := range tests {
fr, _ := testFramer()
if err := fr.WriteContinuation(streamID, tt.end, tt.frag); err != nil {
t.Errorf("test %q: %v", tt.name, err)
continue
}
fr.AllowIllegalReads = true
f, err := fr.ReadFrame()
if err != nil {
t.Errorf("test %q: failed to read the frame back: %v", tt.name, err)
continue
}
if !reflect.DeepEqual(f, tt.wantFrame) {
t.Errorf("test %q: mismatch.\n got: %#v\nwant: %#v\n", tt.name, f, tt.wantFrame)
}
}
}
func TestWritePriority(t *testing.T) {
const streamID = 42
tests := []struct {
name string
priority PriorityParam
wantFrame *PriorityFrame
}{
{
"not exclusive",
PriorityParam{
StreamDep: 2,
Exclusive: false,
Weight: 127,
},
&PriorityFrame{
FrameHeader{
valid: true,
StreamID: streamID,
Type: FramePriority,
Length: 5,
},
PriorityParam{
StreamDep: 2,
Exclusive: false,
Weight: 127,
},
},
},
{
"exclusive",
PriorityParam{
StreamDep: 3,
Exclusive: true,
Weight: 77,
},
&PriorityFrame{
FrameHeader{
valid: true,
StreamID: streamID,
Type: FramePriority,
Length: 5,
},
PriorityParam{
StreamDep: 3,
Exclusive: true,
Weight: 77,
},
},
},
}
for _, tt := range tests {
fr, _ := testFramer()
if err := fr.WritePriority(streamID, tt.priority); err != nil {
t.Errorf("test %q: %v", tt.name, err)
continue
}
f, err := fr.ReadFrame()
if err != nil {
t.Errorf("test %q: failed to read the frame back: %v", tt.name, err)
continue
}
if !reflect.DeepEqual(f, tt.wantFrame) {
t.Errorf("test %q: mismatch.\n got: %#v\nwant: %#v\n", tt.name, f, tt.wantFrame)
}
}
}
func TestWriteSettings(t *testing.T) {
fr, buf := testFramer()
settings := []Setting{{1, 2}, {3, 4}}
fr.WriteSettings(settings...)
const wantEnc = "\x00\x00\f\x04\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x03\x00\x00\x00\x04"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
sf, ok := f.(*SettingsFrame)
if !ok {
t.Fatalf("Got a %T; want a SettingsFrame", f)
}
var got []Setting
sf.ForeachSetting(func(s Setting) error {
got = append(got, s)
valBack, ok := sf.Value(s.ID)
if !ok || valBack != s.Val {
t.Errorf("Value(%d) = %v, %v; want %v, true", s.ID, valBack, ok, s.Val)
}
return nil
})
if !reflect.DeepEqual(settings, got) {
t.Errorf("Read settings %+v != written settings %+v", got, settings)
}
}
func TestWriteSettingsAck(t *testing.T) {
fr, buf := testFramer()
fr.WriteSettingsAck()
const wantEnc = "\x00\x00\x00\x04\x01\x00\x00\x00\x00"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
}
func TestWriteWindowUpdate(t *testing.T) {
fr, buf := testFramer()
const streamID = 1<<24 + 2<<16 + 3<<8 + 4
const incr = 7<<24 + 6<<16 + 5<<8 + 4
if err := fr.WriteWindowUpdate(streamID, incr); err != nil {
t.Fatal(err)
}
const wantEnc = "\x00\x00\x04\x08\x00\x01\x02\x03\x04\x07\x06\x05\x04"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
want := &WindowUpdateFrame{
FrameHeader: FrameHeader{
valid: true,
Type: 0x8,
Flags: 0x0,
Length: 0x4,
StreamID: 0x1020304,
},
Increment: 0x7060504,
}
if !reflect.DeepEqual(f, want) {
t.Errorf("parsed back %#v; want %#v", f, want)
}
}
func TestWritePing(t *testing.T) { testWritePing(t, false) }
func TestWritePingAck(t *testing.T) { testWritePing(t, true) }
func testWritePing(t *testing.T, ack bool) {
fr, buf := testFramer()
if err := fr.WritePing(ack, [8]byte{1, 2, 3, 4, 5, 6, 7, 8}); err != nil {
t.Fatal(err)
}
var wantFlags Flags
if ack {
wantFlags = FlagPingAck
}
var wantEnc = "\x00\x00\x08\x06" + string(wantFlags) + "\x00\x00\x00\x00" + "\x01\x02\x03\x04\x05\x06\x07\x08"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
want := &PingFrame{
FrameHeader: FrameHeader{
valid: true,
Type: 0x6,
Flags: wantFlags,
Length: 0x8,
StreamID: 0,
},
Data: [8]byte{1, 2, 3, 4, 5, 6, 7, 8},
}
if !reflect.DeepEqual(f, want) {
t.Errorf("parsed back %#v; want %#v", f, want)
}
}
func TestReadFrameHeader(t *testing.T) {
tests := []struct {
in string
want FrameHeader
}{
{in: "\x00\x00\x00" + "\x00" + "\x00" + "\x00\x00\x00\x00", want: FrameHeader{}},
{in: "\x01\x02\x03" + "\x04" + "\x05" + "\x06\x07\x08\x09", want: FrameHeader{
Length: 66051, Type: 4, Flags: 5, StreamID: 101124105,
}},
// Ignore high bit:
{in: "\xff\xff\xff" + "\xff" + "\xff" + "\xff\xff\xff\xff", want: FrameHeader{
Length: 16777215, Type: 255, Flags: 255, StreamID: 2147483647}},
{in: "\xff\xff\xff" + "\xff" + "\xff" + "\x7f\xff\xff\xff", want: FrameHeader{
Length: 16777215, Type: 255, Flags: 255, StreamID: 2147483647}},
}
for i, tt := range tests {
got, err := readFrameHeader(make([]byte, 9), strings.NewReader(tt.in))
if err != nil {
t.Errorf("%d. readFrameHeader(%q) = %v", i, tt.in, err)
continue
}
tt.want.valid = true
if got != tt.want {
t.Errorf("%d. readFrameHeader(%q) = %+v; want %+v", i, tt.in, got, tt.want)
}
}
}
func TestReadWriteFrameHeader(t *testing.T) {
tests := []struct {
len uint32
typ FrameType
flags Flags
streamID uint32
}{
{len: 0, typ: 255, flags: 1, streamID: 0},
{len: 0, typ: 255, flags: 1, streamID: 1},
{len: 0, typ: 255, flags: 1, streamID: 255},
{len: 0, typ: 255, flags: 1, streamID: 256},
{len: 0, typ: 255, flags: 1, streamID: 65535},
{len: 0, typ: 255, flags: 1, streamID: 65536},
{len: 0, typ: 1, flags: 255, streamID: 1},
{len: 255, typ: 1, flags: 255, streamID: 1},
{len: 256, typ: 1, flags: 255, streamID: 1},
{len: 65535, typ: 1, flags: 255, streamID: 1},
{len: 65536, typ: 1, flags: 255, streamID: 1},
{len: 16777215, typ: 1, flags: 255, streamID: 1},
}
for _, tt := range tests {
fr, buf := testFramer()
fr.startWrite(tt.typ, tt.flags, tt.streamID)
fr.writeBytes(make([]byte, tt.len))
fr.endWrite()
fh, err := ReadFrameHeader(buf)
if err != nil {
t.Errorf("ReadFrameHeader(%+v) = %v", tt, err)
continue
}
if fh.Type != tt.typ || fh.Flags != tt.flags || fh.Length != tt.len || fh.StreamID != tt.streamID {
t.Errorf("ReadFrameHeader(%+v) = %+v; mismatch", tt, fh)
}
}
}
func TestWriteTooLargeFrame(t *testing.T) {
fr, _ := testFramer()
fr.startWrite(0, 1, 1)
fr.writeBytes(make([]byte, 1<<24))
err := fr.endWrite()
if err != ErrFrameTooLarge {
t.Errorf("endWrite = %v; want errFrameTooLarge", err)
}
}
func TestWriteGoAway(t *testing.T) {
const debug = "foo"
fr, buf := testFramer()
if err := fr.WriteGoAway(0x01020304, 0x05060708, []byte(debug)); err != nil {
t.Fatal(err)
}
const wantEnc = "\x00\x00\v\a\x00\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07\x08" + debug
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
want := &GoAwayFrame{
FrameHeader: FrameHeader{
valid: true,
Type: 0x7,
Flags: 0,
Length: uint32(4 + 4 + len(debug)),
StreamID: 0,
},
LastStreamID: 0x01020304,
ErrCode: 0x05060708,
debugData: []byte(debug),
}
if !reflect.DeepEqual(f, want) {
t.Fatalf("parsed back:\n%#v\nwant:\n%#v", f, want)
}
if got := string(f.(*GoAwayFrame).DebugData()); got != debug {
t.Errorf("debug data = %q; want %q", got, debug)
}
}
func TestWritePushPromise(t *testing.T) {
pp := PushPromiseParam{
StreamID: 42,
PromiseID: 42,
BlockFragment: []byte("abc"),
}
fr, buf := testFramer()
if err := fr.WritePushPromise(pp); err != nil {
t.Fatal(err)
}
const wantEnc = "\x00\x00\x07\x05\x00\x00\x00\x00*\x00\x00\x00*abc"
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
_, ok := f.(*PushPromiseFrame)
if !ok {
t.Fatalf("got %T; want *PushPromiseFrame", f)
}
want := &PushPromiseFrame{
FrameHeader: FrameHeader{
valid: true,
Type: 0x5,
Flags: 0x0,
Length: 0x7,
StreamID: 42,
},
PromiseID: 42,
headerFragBuf: []byte("abc"),
}
if !reflect.DeepEqual(f, want) {
t.Fatalf("parsed back:\n%#v\nwant:\n%#v", f, want)
}
}
// test checkFrameOrder and that HEADERS and CONTINUATION frames can't be intermingled.
func TestReadFrameOrder(t *testing.T) {
head := func(f *Framer, id uint32, end bool) {
f.WriteHeaders(HeadersFrameParam{
StreamID: id,
BlockFragment: []byte("foo"), // unused, but non-empty
EndHeaders: end,
})
}
cont := func(f *Framer, id uint32, end bool) {
f.WriteContinuation(id, end, []byte("foo"))
}
tests := [...]struct {
name string
w func(*Framer)
atLeast int
wantErr string
}{
0: {
w: func(f *Framer) {
head(f, 1, true)
},
},
1: {
w: func(f *Framer) {
head(f, 1, true)
head(f, 2, true)
},
},
2: {
wantErr: "got HEADERS for stream 2; expected CONTINUATION following HEADERS for stream 1",
w: func(f *Framer) {
head(f, 1, false)
head(f, 2, true)
},
},
3: {
wantErr: "got DATA for stream 1; expected CONTINUATION following HEADERS for stream 1",
w: func(f *Framer) {
head(f, 1, false)
},
},
4: {
w: func(f *Framer) {
head(f, 1, false)
cont(f, 1, true)
head(f, 2, true)
},
},
5: {
wantErr: "got CONTINUATION for stream 2; expected stream 1",
w: func(f *Framer) {
head(f, 1, false)
cont(f, 2, true)
head(f, 2, true)
},
},
6: {
wantErr: "unexpected CONTINUATION for stream 1",
w: func(f *Framer) {
cont(f, 1, true)
},
},
7: {
wantErr: "unexpected CONTINUATION for stream 1",
w: func(f *Framer) {
cont(f, 1, false)
},
},
8: {
wantErr: "HEADERS frame with stream ID 0",
w: func(f *Framer) {
head(f, 0, true)
},
},
9: {
wantErr: "CONTINUATION frame with stream ID 0",
w: func(f *Framer) {
cont(f, 0, true)
},
},
10: {
wantErr: "unexpected CONTINUATION for stream 1",
atLeast: 5,
w: func(f *Framer) {
head(f, 1, false)
cont(f, 1, false)
cont(f, 1, false)
cont(f, 1, false)
cont(f, 1, true)
cont(f, 1, false)
},
},
}
for i, tt := range tests {
buf := new(bytes.Buffer)
f := NewFramer(buf, buf)
f.AllowIllegalWrites = true
tt.w(f)
f.WriteData(1, true, nil) // to test transition away from last step
var err error
n := 0
var log bytes.Buffer
for {
var got Frame
got, err = f.ReadFrame()
fmt.Fprintf(&log, " read %v, %v\n", got, err)
if err != nil {
break
}
n++
}
if err == io.EOF {
err = nil
}
ok := tt.wantErr == ""
if ok && err != nil {
t.Errorf("%d. after %d good frames, ReadFrame = %v; want success\n%s", i, n, err, log.Bytes())
continue
}
if !ok && err != ConnectionError(ErrCodeProtocol) {
t.Errorf("%d. after %d good frames, ReadFrame = %v; want ConnectionError(ErrCodeProtocol)\n%s", i, n, err, log.Bytes())
continue
}
if !((f.errDetail == nil && tt.wantErr == "") || (fmt.Sprint(f.errDetail) == tt.wantErr)) {
t.Errorf("%d. framer eror = %q; want %q\n%s", i, f.errDetail, tt.wantErr, log.Bytes())
}
if n < tt.atLeast {
t.Errorf("%d. framer only read %d frames; want at least %d\n%s", i, n, tt.atLeast, log.Bytes())
}
}
}
func TestMetaFrameHeader(t *testing.T) {
write := func(f *Framer, frags ...[]byte) {
for i, frag := range frags {
end := (i == len(frags)-1)
if i == 0 {
f.WriteHeaders(HeadersFrameParam{
StreamID: 1,
BlockFragment: frag,
EndHeaders: end,
})
} else {
f.WriteContinuation(1, end, frag)
}
}
}
want := func(flags Flags, length uint32, pairs ...string) *MetaHeadersFrame {
mh := &MetaHeadersFrame{
HeadersFrame: &HeadersFrame{
FrameHeader: FrameHeader{
Type: FrameHeaders,
Flags: flags,
Length: length,
StreamID: 1,
},
},
Fields: []hpack.HeaderField(nil),
}
for len(pairs) > 0 {
mh.Fields = append(mh.Fields, hpack.HeaderField{
Name: pairs[0],
Value: pairs[1],
})
pairs = pairs[2:]
}
return mh
}
truncated := func(mh *MetaHeadersFrame) *MetaHeadersFrame {
mh.Truncated = true
return mh
}
const noFlags Flags = 0
oneKBString := strings.Repeat("a", 1<<10)
tests := [...]struct {
name string
w func(*Framer)
want interface{} // *MetaHeaderFrame or error
wantErrReason string
maxHeaderListSize uint32
}{
0: {
name: "single_headers",
w: func(f *Framer) {
var he hpackEncoder
all := he.encodeHeaderRaw(t, ":method", "GET", ":path", "/")
write(f, all)
},
want: want(FlagHeadersEndHeaders, 2, ":method", "GET", ":path", "/"),
},
1: {
name: "with_continuation",
w: func(f *Framer) {
var he hpackEncoder
all := he.encodeHeaderRaw(t, ":method", "GET", ":path", "/", "foo", "bar")
write(f, all[:1], all[1:])
},
want: want(noFlags, 1, ":method", "GET", ":path", "/", "foo", "bar"),
},
2: {
name: "with_two_continuation",
w: func(f *Framer) {
var he hpackEncoder
all := he.encodeHeaderRaw(t, ":method", "GET", ":path", "/", "foo", "bar")
write(f, all[:2], all[2:4], all[4:])
},
want: want(noFlags, 2, ":method", "GET", ":path", "/", "foo", "bar"),
},
3: {
name: "big_string_okay",
w: func(f *Framer) {
var he hpackEncoder
all := he.encodeHeaderRaw(t, ":method", "GET", ":path", "/", "foo", oneKBString)
write(f, all[:2], all[2:])
},
want: want(noFlags, 2, ":method", "GET", ":path", "/", "foo", oneKBString),
},
4: {
name: "big_string_error",
w: func(f *Framer) {
var he hpackEncoder
all := he.encodeHeaderRaw(t, ":method", "GET", ":path", "/", "foo", oneKBString)
write(f, all[:2], all[2:])
},
maxHeaderListSize: (1 << 10) / 2,
want: ConnectionError(ErrCodeCompression),
},
5: {
name: "max_header_list_truncated",
w: func(f *Framer) {
var he hpackEncoder
var pairs = []string{":method", "GET", ":path", "/"}
for i := 0; i < 100; i++ {
pairs = append(pairs, "foo", "bar")
}
all := he.encodeHeaderRaw(t, pairs...)
write(f, all[:2], all[2:])
},
maxHeaderListSize: (1 << 10) / 2,
want: truncated(want(noFlags, 2,
":method", "GET",
":path", "/",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar",
"foo", "bar", // 11
)),
},
6: {
name: "pseudo_order",
w: func(f *Framer) {
write(f, encodeHeaderRaw(t,
":method", "GET",
"foo", "bar",
":path", "/", // bogus
))
},
want: streamError(1, ErrCodeProtocol),
wantErrReason: "pseudo header field after regular",
},
7: {
name: "pseudo_unknown",
w: func(f *Framer) {
write(f, encodeHeaderRaw(t,
":unknown", "foo", // bogus
"foo", "bar",
))
},
want: streamError(1, ErrCodeProtocol),
wantErrReason: "invalid pseudo-header \":unknown\"",
},
8: {
name: "pseudo_mix_request_response",
w: func(f *Framer) {
write(f, encodeHeaderRaw(t,
":method", "GET",
":status", "100",
))
},
want: streamError(1, ErrCodeProtocol),
wantErrReason: "mix of request and response pseudo headers",
},
9: {
name: "pseudo_dup",
w: func(f *Framer) {
write(f, encodeHeaderRaw(t,
":method", "GET",
":method", "POST",
))
},
want: streamError(1, ErrCodeProtocol),
wantErrReason: "duplicate pseudo-header \":method\"",
},
10: {
name: "trailer_okay_no_pseudo",
w: func(f *Framer) { write(f, encodeHeaderRaw(t, "foo", "bar")) },
want: want(FlagHeadersEndHeaders, 8, "foo", "bar"),
},
11: {
name: "invalid_field_name",
w: func(f *Framer) { write(f, encodeHeaderRaw(t, "CapitalBad", "x")) },
want: streamError(1, ErrCodeProtocol),
wantErrReason: "invalid header field name \"CapitalBad\"",
},
12: {
name: "invalid_field_value",
w: func(f *Framer) { write(f, encodeHeaderRaw(t, "key", "bad_null\x00")) },
want: streamError(1, ErrCodeProtocol),
wantErrReason: "invalid header field value \"bad_null\\x00\"",
},
}
for i, tt := range tests {
buf := new(bytes.Buffer)
f := NewFramer(buf, buf)
f.ReadMetaHeaders = hpack.NewDecoder(initialHeaderTableSize, nil)
f.MaxHeaderListSize = tt.maxHeaderListSize
tt.w(f)
name := tt.name
if name == "" {
name = fmt.Sprintf("test index %d", i)
}
var got interface{}
var err error
got, err = f.ReadFrame()
if err != nil {
got = err
// Ignore the StreamError.Cause field, if it matches the wantErrReason.
// The test table above predates the Cause field.
if se, ok := err.(StreamError); ok && se.Cause != nil && se.Cause.Error() == tt.wantErrReason {
se.Cause = nil
got = se
}
}
if !reflect.DeepEqual(got, tt.want) {
if mhg, ok := got.(*MetaHeadersFrame); ok {
if mhw, ok := tt.want.(*MetaHeadersFrame); ok {
hg := mhg.HeadersFrame
hw := mhw.HeadersFrame
if hg != nil && hw != nil && !reflect.DeepEqual(*hg, *hw) {
t.Errorf("%s: headers differ:\n got: %+v\nwant: %+v\n", name, *hg, *hw)
}
}
}
str := func(v interface{}) string {
if _, ok := v.(error); ok {
return fmt.Sprintf("error %v", v)
} else {
return fmt.Sprintf("value %#v", v)
}
}
t.Errorf("%s:\n got: %v\nwant: %s", name, str(got), str(tt.want))
}
if tt.wantErrReason != "" && tt.wantErrReason != fmt.Sprint(f.errDetail) {
t.Errorf("%s: got error reason %q; want %q", name, f.errDetail, tt.wantErrReason)
}
}
}
func TestSetReuseFrames(t *testing.T) {
fr, buf := testFramer()
fr.SetReuseFrames()
// Check that DataFrames are reused. Note that
// SetReuseFrames only currently implements reuse of DataFrames.
firstDf := readAndVerifyDataFrame("ABC", 3, fr, buf, t)
for i := 0; i < 10; i++ {
df := readAndVerifyDataFrame("XYZ", 3, fr, buf, t)
if df != firstDf {
t.Errorf("Expected Framer to return references to the same DataFrame. Have %v and %v", &df, &firstDf)
}
}
for i := 0; i < 10; i++ {
df := readAndVerifyDataFrame("", 0, fr, buf, t)
if df != firstDf {
t.Errorf("Expected Framer to return references to the same DataFrame. Have %v and %v", &df, &firstDf)
}
}
for i := 0; i < 10; i++ {
df := readAndVerifyDataFrame("HHH", 3, fr, buf, t)
if df != firstDf {
t.Errorf("Expected Framer to return references to the same DataFrame. Have %v and %v", &df, &firstDf)
}
}
}
func TestSetReuseFramesMoreThanOnce(t *testing.T) {
fr, buf := testFramer()
fr.SetReuseFrames()
firstDf := readAndVerifyDataFrame("ABC", 3, fr, buf, t)
fr.SetReuseFrames()
for i := 0; i < 10; i++ {
df := readAndVerifyDataFrame("XYZ", 3, fr, buf, t)
// SetReuseFrames should be idempotent
fr.SetReuseFrames()
if df != firstDf {
t.Errorf("Expected Framer to return references to the same DataFrame. Have %v and %v", &df, &firstDf)
}
}
}
func TestNoSetReuseFrames(t *testing.T) {
fr, buf := testFramer()
const numNewDataFrames = 10
dfSoFar := make([]interface{}, numNewDataFrames)
// Check that DataFrames are not reused if SetReuseFrames wasn't called.
// SetReuseFrames only currently implements reuse of DataFrames.
for i := 0; i < numNewDataFrames; i++ {
df := readAndVerifyDataFrame("XYZ", 3, fr, buf, t)
for _, item := range dfSoFar {
if df == item {
t.Errorf("Expected Framer to return new DataFrames since SetNoReuseFrames not set.")
}
}
dfSoFar[i] = df
}
}
func readAndVerifyDataFrame(data string, length byte, fr *Framer, buf *bytes.Buffer, t *testing.T) *DataFrame {
var streamID uint32 = 1<<24 + 2<<16 + 3<<8 + 4
fr.WriteData(streamID, true, []byte(data))
wantEnc := "\x00\x00" + string(length) + "\x00\x01\x01\x02\x03\x04" + data
if buf.String() != wantEnc {
t.Errorf("encoded as %q; want %q", buf.Bytes(), wantEnc)
}
f, err := fr.ReadFrame()
if err != nil {
t.Fatal(err)
}
df, ok := f.(*DataFrame)
if !ok {
t.Fatalf("got %T; want *DataFrame", f)
}
if !bytes.Equal(df.Data(), []byte(data)) {
t.Errorf("got %q; want %q", df.Data(), []byte(data))
}
if f.Header().Flags&1 == 0 {
t.Errorf("didn't see END_STREAM flag")
}
return df
}
func encodeHeaderRaw(t *testing.T, pairs ...string) []byte {
var he hpackEncoder
return he.encodeHeaderRaw(t, pairs...)
}
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