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vendor: Update vendoring for the exec client and server implementations

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Signed-off-by: Jacek J. Łakis <jacek.lakis@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Jacek J. Łakis 2017-02-08 14:57:52 +01:00 • committed by Samuel Ortiz
parent d25b88583f
commit bf51655a7b
2124 changed files with 809703 additions and 5 deletions
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187
vendor/github.com/docker/spdystream/spdy/dictionary.go generated vendored Normal file
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@ -0,0 +1,187 @@
// Copyright 2013 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 spdy
// headerDictionary is the dictionary sent to the zlib compressor/decompressor.
var headerDictionary = []byte{
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}

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// Copyright 2011 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 spdy
import (
"compress/zlib"
"encoding/binary"
"io"
"net/http"
"strings"
)
func (frame *SynStreamFrame) read(h ControlFrameHeader, f *Framer) error {
return f.readSynStreamFrame(h, frame)
}
func (frame *SynReplyFrame) read(h ControlFrameHeader, f *Framer) error {
return f.readSynReplyFrame(h, frame)
}
func (frame *RstStreamFrame) read(h ControlFrameHeader, f *Framer) error {
frame.CFHeader = h
if err := binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
return err
}
if err := binary.Read(f.r, binary.BigEndian, &frame.Status); err != nil {
return err
}
if frame.Status == 0 {
return &Error{InvalidControlFrame, frame.StreamId}
}
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
return nil
}
func (frame *SettingsFrame) read(h ControlFrameHeader, f *Framer) error {
frame.CFHeader = h
var numSettings uint32
if err := binary.Read(f.r, binary.BigEndian, &numSettings); err != nil {
return err
}
frame.FlagIdValues = make([]SettingsFlagIdValue, numSettings)
for i := uint32(0); i < numSettings; i++ {
if err := binary.Read(f.r, binary.BigEndian, &frame.FlagIdValues[i].Id); err != nil {
return err
}
frame.FlagIdValues[i].Flag = SettingsFlag((frame.FlagIdValues[i].Id & 0xff000000) >> 24)
frame.FlagIdValues[i].Id &= 0xffffff
if err := binary.Read(f.r, binary.BigEndian, &frame.FlagIdValues[i].Value); err != nil {
return err
}
}
return nil
}
func (frame *PingFrame) read(h ControlFrameHeader, f *Framer) error {
frame.CFHeader = h
if err := binary.Read(f.r, binary.BigEndian, &frame.Id); err != nil {
return err
}
if frame.Id == 0 {
return &Error{ZeroStreamId, 0}
}
if frame.CFHeader.Flags != 0 {
return &Error{InvalidControlFrame, StreamId(frame.Id)}
}
return nil
}
func (frame *GoAwayFrame) read(h ControlFrameHeader, f *Framer) error {
frame.CFHeader = h
if err := binary.Read(f.r, binary.BigEndian, &frame.LastGoodStreamId); err != nil {
return err
}
if frame.CFHeader.Flags != 0 {
return &Error{InvalidControlFrame, frame.LastGoodStreamId}
}
if frame.CFHeader.length != 8 {
return &Error{InvalidControlFrame, frame.LastGoodStreamId}
}
if err := binary.Read(f.r, binary.BigEndian, &frame.Status); err != nil {
return err
}
return nil
}
func (frame *HeadersFrame) read(h ControlFrameHeader, f *Framer) error {
return f.readHeadersFrame(h, frame)
}
func (frame *WindowUpdateFrame) read(h ControlFrameHeader, f *Framer) error {
frame.CFHeader = h
if err := binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
return err
}
if frame.CFHeader.Flags != 0 {
return &Error{InvalidControlFrame, frame.StreamId}
}
if frame.CFHeader.length != 8 {
return &Error{InvalidControlFrame, frame.StreamId}
}
if err := binary.Read(f.r, binary.BigEndian, &frame.DeltaWindowSize); err != nil {
return err
}
return nil
}
func newControlFrame(frameType ControlFrameType) (controlFrame, error) {
ctor, ok := cframeCtor[frameType]
if !ok {
return nil, &Error{Err: InvalidControlFrame}
}
return ctor(), nil
}
var cframeCtor = map[ControlFrameType]func() controlFrame{
TypeSynStream: func() controlFrame { return new(SynStreamFrame) },
TypeSynReply: func() controlFrame { return new(SynReplyFrame) },
TypeRstStream: func() controlFrame { return new(RstStreamFrame) },
TypeSettings: func() controlFrame { return new(SettingsFrame) },
TypePing: func() controlFrame { return new(PingFrame) },
TypeGoAway: func() controlFrame { return new(GoAwayFrame) },
TypeHeaders: func() controlFrame { return new(HeadersFrame) },
TypeWindowUpdate: func() controlFrame { return new(WindowUpdateFrame) },
}
func (f *Framer) uncorkHeaderDecompressor(payloadSize int64) error {
if f.headerDecompressor != nil {
f.headerReader.N = payloadSize
return nil
}
f.headerReader = io.LimitedReader{R: f.r, N: payloadSize}
decompressor, err := zlib.NewReaderDict(&f.headerReader, []byte(headerDictionary))
if err != nil {
return err
}
f.headerDecompressor = decompressor
return nil
}
// ReadFrame reads SPDY encoded data and returns a decompressed Frame.
func (f *Framer) ReadFrame() (Frame, error) {
var firstWord uint32
if err := binary.Read(f.r, binary.BigEndian, &firstWord); err != nil {
return nil, err
}
if firstWord&0x80000000 != 0 {
frameType := ControlFrameType(firstWord & 0xffff)
version := uint16(firstWord >> 16 & 0x7fff)
return f.parseControlFrame(version, frameType)
}
return f.parseDataFrame(StreamId(firstWord & 0x7fffffff))
}
func (f *Framer) parseControlFrame(version uint16, frameType ControlFrameType) (Frame, error) {
var length uint32
if err := binary.Read(f.r, binary.BigEndian, &length); err != nil {
return nil, err
}
flags := ControlFlags((length & 0xff000000) >> 24)
length &= 0xffffff
header := ControlFrameHeader{version, frameType, flags, length}
cframe, err := newControlFrame(frameType)
if err != nil {
return nil, err
}
if err = cframe.read(header, f); err != nil {
return nil, err
}
return cframe, nil
}
func parseHeaderValueBlock(r io.Reader, streamId StreamId) (http.Header, error) {
var numHeaders uint32
if err := binary.Read(r, binary.BigEndian, &numHeaders); err != nil {
return nil, err
}
var e error
h := make(http.Header, int(numHeaders))
for i := 0; i < int(numHeaders); i++ {
var length uint32
if err := binary.Read(r, binary.BigEndian, &length); err != nil {
return nil, err
}
nameBytes := make([]byte, length)
if _, err := io.ReadFull(r, nameBytes); err != nil {
return nil, err
}
name := string(nameBytes)
if name != strings.ToLower(name) {
e = &Error{UnlowercasedHeaderName, streamId}
name = strings.ToLower(name)
}
if h[name] != nil {
e = &Error{DuplicateHeaders, streamId}
}
if err := binary.Read(r, binary.BigEndian, &length); err != nil {
return nil, err
}
value := make([]byte, length)
if _, err := io.ReadFull(r, value); err != nil {
return nil, err
}
valueList := strings.Split(string(value), headerValueSeparator)
for _, v := range valueList {
h.Add(name, v)
}
}
if e != nil {
return h, e
}
return h, nil
}
func (f *Framer) readSynStreamFrame(h ControlFrameHeader, frame *SynStreamFrame) error {
frame.CFHeader = h
var err error
if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
return err
}
if err = binary.Read(f.r, binary.BigEndian, &frame.AssociatedToStreamId); err != nil {
return err
}
if err = binary.Read(f.r, binary.BigEndian, &frame.Priority); err != nil {
return err
}
frame.Priority >>= 5
if err = binary.Read(f.r, binary.BigEndian, &frame.Slot); err != nil {
return err
}
reader := f.r
if !f.headerCompressionDisabled {
err := f.uncorkHeaderDecompressor(int64(h.length - 10))
if err != nil {
return err
}
reader = f.headerDecompressor
}
frame.Headers, err = parseHeaderValueBlock(reader, frame.StreamId)
if !f.headerCompressionDisabled && (err == io.EOF && f.headerReader.N == 0 || f.headerReader.N != 0) {
err = &Error{WrongCompressedPayloadSize, 0}
}
if err != nil {
return err
}
for h := range frame.Headers {
if invalidReqHeaders[h] {
return &Error{InvalidHeaderPresent, frame.StreamId}
}
}
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
return nil
}
func (f *Framer) readSynReplyFrame(h ControlFrameHeader, frame *SynReplyFrame) error {
frame.CFHeader = h
var err error
if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
return err
}
reader := f.r
if !f.headerCompressionDisabled {
err := f.uncorkHeaderDecompressor(int64(h.length - 4))
if err != nil {
return err
}
reader = f.headerDecompressor
}
frame.Headers, err = parseHeaderValueBlock(reader, frame.StreamId)
if !f.headerCompressionDisabled && (err == io.EOF && f.headerReader.N == 0 || f.headerReader.N != 0) {
err = &Error{WrongCompressedPayloadSize, 0}
}
if err != nil {
return err
}
for h := range frame.Headers {
if invalidRespHeaders[h] {
return &Error{InvalidHeaderPresent, frame.StreamId}
}
}
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
return nil
}
func (f *Framer) readHeadersFrame(h ControlFrameHeader, frame *HeadersFrame) error {
frame.CFHeader = h
var err error
if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
return err
}
reader := f.r
if !f.headerCompressionDisabled {
err := f.uncorkHeaderDecompressor(int64(h.length - 4))
if err != nil {
return err
}
reader = f.headerDecompressor
}
frame.Headers, err = parseHeaderValueBlock(reader, frame.StreamId)
if !f.headerCompressionDisabled && (err == io.EOF && f.headerReader.N == 0 || f.headerReader.N != 0) {
err = &Error{WrongCompressedPayloadSize, 0}
}
if err != nil {
return err
}
var invalidHeaders map[string]bool
if frame.StreamId%2 == 0 {
invalidHeaders = invalidReqHeaders
} else {
invalidHeaders = invalidRespHeaders
}
for h := range frame.Headers {
if invalidHeaders[h] {
return &Error{InvalidHeaderPresent, frame.StreamId}
}
}
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
return nil
}
func (f *Framer) parseDataFrame(streamId StreamId) (*DataFrame, error) {
var length uint32
if err := binary.Read(f.r, binary.BigEndian, &length); err != nil {
return nil, err
}
var frame DataFrame
frame.StreamId = streamId
frame.Flags = DataFlags(length >> 24)
length &= 0xffffff
frame.Data = make([]byte, length)
if _, err := io.ReadFull(f.r, frame.Data); err != nil {
return nil, err
}
if frame.StreamId == 0 {
return nil, &Error{ZeroStreamId, 0}
}
return &frame, nil
}

644
vendor/github.com/docker/spdystream/spdy/spdy_test.go generated vendored Normal file
View file

@ -0,0 +1,644 @@
// Copyright 2011 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 spdy
import (
"bytes"
"compress/zlib"
"encoding/base64"
"io"
"io/ioutil"
"net/http"
"reflect"
"testing"
)
var HeadersFixture = http.Header{
"Url": []string{"http://www.google.com/"},
"Method": []string{"get"},
"Version": []string{"http/1.1"},
}
func TestHeaderParsing(t *testing.T) {
var headerValueBlockBuf bytes.Buffer
writeHeaderValueBlock(&headerValueBlockBuf, HeadersFixture)
const bogusStreamId = 1
newHeaders, err := parseHeaderValueBlock(&headerValueBlockBuf, bogusStreamId)
if err != nil {
t.Fatal("parseHeaderValueBlock:", err)
}
if !reflect.DeepEqual(HeadersFixture, newHeaders) {
t.Fatal("got: ", newHeaders, "\nwant: ", HeadersFixture)
}
}
func TestCreateParseSynStreamFrameCompressionDisable(t *testing.T) {
buffer := new(bytes.Buffer)
// Fixture framer for no compression test.
framer := &Framer{
headerCompressionDisabled: true,
w: buffer,
headerBuf: new(bytes.Buffer),
r: buffer,
}
synStreamFrame := SynStreamFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSynStream,
},
StreamId: 2,
Headers: HeadersFixture,
}
if err := framer.WriteFrame(&synStreamFrame); err != nil {
t.Fatal("WriteFrame without compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame without compression:", err)
}
parsedSynStreamFrame, ok := frame.(*SynStreamFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(synStreamFrame, *parsedSynStreamFrame) {
t.Fatal("got: ", *parsedSynStreamFrame, "\nwant: ", synStreamFrame)
}
}
func TestCreateParseSynStreamFrameCompressionEnable(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
synStreamFrame := SynStreamFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSynStream,
},
StreamId: 2,
Headers: HeadersFixture,
}
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
if err := framer.WriteFrame(&synStreamFrame); err != nil {
t.Fatal("WriteFrame with compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame with compression:", err)
}
parsedSynStreamFrame, ok := frame.(*SynStreamFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(synStreamFrame, *parsedSynStreamFrame) {
t.Fatal("got: ", *parsedSynStreamFrame, "\nwant: ", synStreamFrame)
}
}
func TestCreateParseSynReplyFrameCompressionDisable(t *testing.T) {
buffer := new(bytes.Buffer)
framer := &Framer{
headerCompressionDisabled: true,
w: buffer,
headerBuf: new(bytes.Buffer),
r: buffer,
}
synReplyFrame := SynReplyFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSynReply,
},
StreamId: 2,
Headers: HeadersFixture,
}
if err := framer.WriteFrame(&synReplyFrame); err != nil {
t.Fatal("WriteFrame without compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame without compression:", err)
}
parsedSynReplyFrame, ok := frame.(*SynReplyFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(synReplyFrame, *parsedSynReplyFrame) {
t.Fatal("got: ", *parsedSynReplyFrame, "\nwant: ", synReplyFrame)
}
}
func TestCreateParseSynReplyFrameCompressionEnable(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
synReplyFrame := SynReplyFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSynReply,
},
StreamId: 2,
Headers: HeadersFixture,
}
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
if err := framer.WriteFrame(&synReplyFrame); err != nil {
t.Fatal("WriteFrame with compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame with compression:", err)
}
parsedSynReplyFrame, ok := frame.(*SynReplyFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(synReplyFrame, *parsedSynReplyFrame) {
t.Fatal("got: ", *parsedSynReplyFrame, "\nwant: ", synReplyFrame)
}
}
func TestCreateParseRstStream(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
rstStreamFrame := RstStreamFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeRstStream,
},
StreamId: 1,
Status: InvalidStream,
}
if err := framer.WriteFrame(&rstStreamFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedRstStreamFrame, ok := frame.(*RstStreamFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(rstStreamFrame, *parsedRstStreamFrame) {
t.Fatal("got: ", *parsedRstStreamFrame, "\nwant: ", rstStreamFrame)
}
}
func TestCreateParseSettings(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
settingsFrame := SettingsFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSettings,
},
FlagIdValues: []SettingsFlagIdValue{
{FlagSettingsPersistValue, SettingsCurrentCwnd, 10},
{FlagSettingsPersisted, SettingsUploadBandwidth, 1},
},
}
if err := framer.WriteFrame(&settingsFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedSettingsFrame, ok := frame.(*SettingsFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(settingsFrame, *parsedSettingsFrame) {
t.Fatal("got: ", *parsedSettingsFrame, "\nwant: ", settingsFrame)
}
}
func TestCreateParsePing(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
pingFrame := PingFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypePing,
},
Id: 31337,
}
if err := framer.WriteFrame(&pingFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
if pingFrame.CFHeader.Flags != 0 {
t.Fatal("Incorrect frame type:", pingFrame)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedPingFrame, ok := frame.(*PingFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if parsedPingFrame.CFHeader.Flags != 0 {
t.Fatal("Parsed incorrect frame type:", parsedPingFrame)
}
if !reflect.DeepEqual(pingFrame, *parsedPingFrame) {
t.Fatal("got: ", *parsedPingFrame, "\nwant: ", pingFrame)
}
}
func TestCreateParseGoAway(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
goAwayFrame := GoAwayFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeGoAway,
},
LastGoodStreamId: 31337,
Status: 1,
}
if err := framer.WriteFrame(&goAwayFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
if goAwayFrame.CFHeader.Flags != 0 {
t.Fatal("Incorrect frame type:", goAwayFrame)
}
if goAwayFrame.CFHeader.length != 8 {
t.Fatal("Incorrect frame type:", goAwayFrame)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedGoAwayFrame, ok := frame.(*GoAwayFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if parsedGoAwayFrame.CFHeader.Flags != 0 {
t.Fatal("Incorrect frame type:", parsedGoAwayFrame)
}
if parsedGoAwayFrame.CFHeader.length != 8 {
t.Fatal("Incorrect frame type:", parsedGoAwayFrame)
}
if !reflect.DeepEqual(goAwayFrame, *parsedGoAwayFrame) {
t.Fatal("got: ", *parsedGoAwayFrame, "\nwant: ", goAwayFrame)
}
}
func TestCreateParseHeadersFrame(t *testing.T) {
buffer := new(bytes.Buffer)
framer := &Framer{
headerCompressionDisabled: true,
w: buffer,
headerBuf: new(bytes.Buffer),
r: buffer,
}
headersFrame := HeadersFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeHeaders,
},
StreamId: 2,
}
headersFrame.Headers = HeadersFixture
if err := framer.WriteFrame(&headersFrame); err != nil {
t.Fatal("WriteFrame without compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame without compression:", err)
}
parsedHeadersFrame, ok := frame.(*HeadersFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(headersFrame, *parsedHeadersFrame) {
t.Fatal("got: ", *parsedHeadersFrame, "\nwant: ", headersFrame)
}
}
func TestCreateParseHeadersFrameCompressionEnable(t *testing.T) {
buffer := new(bytes.Buffer)
headersFrame := HeadersFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeHeaders,
},
StreamId: 2,
}
headersFrame.Headers = HeadersFixture
framer, err := NewFramer(buffer, buffer)
if err := framer.WriteFrame(&headersFrame); err != nil {
t.Fatal("WriteFrame with compression:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame with compression:", err)
}
parsedHeadersFrame, ok := frame.(*HeadersFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(headersFrame, *parsedHeadersFrame) {
t.Fatal("got: ", *parsedHeadersFrame, "\nwant: ", headersFrame)
}
}
func TestCreateParseWindowUpdateFrame(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
windowUpdateFrame := WindowUpdateFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeWindowUpdate,
},
StreamId: 31337,
DeltaWindowSize: 1,
}
if err := framer.WriteFrame(&windowUpdateFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
if windowUpdateFrame.CFHeader.Flags != 0 {
t.Fatal("Incorrect frame type:", windowUpdateFrame)
}
if windowUpdateFrame.CFHeader.length != 8 {
t.Fatal("Incorrect frame type:", windowUpdateFrame)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedWindowUpdateFrame, ok := frame.(*WindowUpdateFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if parsedWindowUpdateFrame.CFHeader.Flags != 0 {
t.Fatal("Incorrect frame type:", parsedWindowUpdateFrame)
}
if parsedWindowUpdateFrame.CFHeader.length != 8 {
t.Fatal("Incorrect frame type:", parsedWindowUpdateFrame)
}
if !reflect.DeepEqual(windowUpdateFrame, *parsedWindowUpdateFrame) {
t.Fatal("got: ", *parsedWindowUpdateFrame, "\nwant: ", windowUpdateFrame)
}
}
func TestCreateParseDataFrame(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
dataFrame := DataFrame{
StreamId: 1,
Data: []byte{'h', 'e', 'l', 'l', 'o'},
}
if err := framer.WriteFrame(&dataFrame); err != nil {
t.Fatal("WriteFrame:", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame:", err)
}
parsedDataFrame, ok := frame.(*DataFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(dataFrame, *parsedDataFrame) {
t.Fatal("got: ", *parsedDataFrame, "\nwant: ", dataFrame)
}
}
func TestCompressionContextAcrossFrames(t *testing.T) {
buffer := new(bytes.Buffer)
framer, err := NewFramer(buffer, buffer)
if err != nil {
t.Fatal("Failed to create new framer:", err)
}
headersFrame := HeadersFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeHeaders,
},
StreamId: 2,
Headers: HeadersFixture,
}
if err := framer.WriteFrame(&headersFrame); err != nil {
t.Fatal("WriteFrame (HEADERS):", err)
}
synStreamFrame := SynStreamFrame{
ControlFrameHeader{
Version,
TypeSynStream,
0, // Flags
0, // length
},
2, // StreamId
0, // AssociatedTOStreamID
0, // Priority
1, // Slot
nil, // Headers
}
synStreamFrame.Headers = HeadersFixture
if err := framer.WriteFrame(&synStreamFrame); err != nil {
t.Fatal("WriteFrame (SYN_STREAM):", err)
}
frame, err := framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame (HEADERS):", err, buffer.Bytes())
}
parsedHeadersFrame, ok := frame.(*HeadersFrame)
if !ok {
t.Fatalf("expected HeadersFrame; got %T %v", frame, frame)
}
if !reflect.DeepEqual(headersFrame, *parsedHeadersFrame) {
t.Fatal("got: ", *parsedHeadersFrame, "\nwant: ", headersFrame)
}
frame, err = framer.ReadFrame()
if err != nil {
t.Fatal("ReadFrame (SYN_STREAM):", err, buffer.Bytes())
}
parsedSynStreamFrame, ok := frame.(*SynStreamFrame)
if !ok {
t.Fatalf("expected SynStreamFrame; got %T %v", frame, frame)
}
if !reflect.DeepEqual(synStreamFrame, *parsedSynStreamFrame) {
t.Fatal("got: ", *parsedSynStreamFrame, "\nwant: ", synStreamFrame)
}
}
func TestMultipleSPDYFrames(t *testing.T) {
// Initialize the framers.
pr1, pw1 := io.Pipe()
pr2, pw2 := io.Pipe()
writer, err := NewFramer(pw1, pr2)
if err != nil {
t.Fatal("Failed to create writer:", err)
}
reader, err := NewFramer(pw2, pr1)
if err != nil {
t.Fatal("Failed to create reader:", err)
}
// Set up the frames we're actually transferring.
headersFrame := HeadersFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeHeaders,
},
StreamId: 2,
Headers: HeadersFixture,
}
synStreamFrame := SynStreamFrame{
CFHeader: ControlFrameHeader{
version: Version,
frameType: TypeSynStream,
},
StreamId: 2,
Headers: HeadersFixture,
}
// Start the goroutines to write the frames.
go func() {
if err := writer.WriteFrame(&headersFrame); err != nil {
t.Fatal("WriteFrame (HEADERS): ", err)
}
if err := writer.WriteFrame(&synStreamFrame); err != nil {
t.Fatal("WriteFrame (SYN_STREAM): ", err)
}
}()
// Read the frames and verify they look as expected.
frame, err := reader.ReadFrame()
if err != nil {
t.Fatal("ReadFrame (HEADERS): ", err)
}
parsedHeadersFrame, ok := frame.(*HeadersFrame)
if !ok {
t.Fatal("Parsed incorrect frame type:", frame)
}
if !reflect.DeepEqual(headersFrame, *parsedHeadersFrame) {
t.Fatal("got: ", *parsedHeadersFrame, "\nwant: ", headersFrame)
}
frame, err = reader.ReadFrame()
if err != nil {
t.Fatal("ReadFrame (SYN_STREAM):", err)
}
parsedSynStreamFrame, ok := frame.(*SynStreamFrame)
if !ok {
t.Fatal("Parsed incorrect frame type.")
}
if !reflect.DeepEqual(synStreamFrame, *parsedSynStreamFrame) {
t.Fatal("got: ", *parsedSynStreamFrame, "\nwant: ", synStreamFrame)
}
}
func TestReadMalformedZlibHeader(t *testing.T) {
// These were constructed by corrupting the first byte of the zlib
// header after writing.
malformedStructs := map[string]string{
"SynStreamFrame": "gAIAAQAAABgAAAACAAAAAAAAF/nfolGyYmAAAAAA//8=",
"SynReplyFrame": "gAIAAgAAABQAAAACAAAX+d+iUbJiYAAAAAD//w==",
"HeadersFrame": "gAIACAAAABQAAAACAAAX+d+iUbJiYAAAAAD//w==",
}
for name, bad := range malformedStructs {
b, err := base64.StdEncoding.DecodeString(bad)
if err != nil {
t.Errorf("Unable to decode base64 encoded frame %s: %v", name, err)
}
buf := bytes.NewBuffer(b)
reader, err := NewFramer(buf, buf)
if err != nil {
t.Fatalf("NewFramer: %v", err)
}
_, err = reader.ReadFrame()
if err != zlib.ErrHeader {
t.Errorf("Frame %s, expected: %#v, actual: %#v", name, zlib.ErrHeader, err)
}
}
}
// TODO: these tests are too weak for updating SPDY spec. Fix me.
type zeroStream struct {
frame Frame
encoded string
}
var streamIdZeroFrames = map[string]zeroStream{
"SynStreamFrame": {
&SynStreamFrame{StreamId: 0},
"gAIAAQAAABgAAAAAAAAAAAAAePnfolGyYmAAAAAA//8=",
},
"SynReplyFrame": {
&SynReplyFrame{StreamId: 0},
"gAIAAgAAABQAAAAAAAB4+d+iUbJiYAAAAAD//w==",
},
"RstStreamFrame": {
&RstStreamFrame{StreamId: 0},
"gAIAAwAAAAgAAAAAAAAAAA==",
},
"HeadersFrame": {
&HeadersFrame{StreamId: 0},
"gAIACAAAABQAAAAAAAB4+d+iUbJiYAAAAAD//w==",
},
"DataFrame": {
&DataFrame{StreamId: 0},
"AAAAAAAAAAA=",
},
"PingFrame": {
&PingFrame{Id: 0},
"gAIABgAAAAQAAAAA",
},
}
func TestNoZeroStreamId(t *testing.T) {
t.Log("skipping") // TODO: update to work with SPDY3
return
for name, f := range streamIdZeroFrames {
b, err := base64.StdEncoding.DecodeString(f.encoded)
if err != nil {
t.Errorf("Unable to decode base64 encoded frame %s: %v", f, err)
continue
}
framer, err := NewFramer(ioutil.Discard, bytes.NewReader(b))
if err != nil {
t.Fatalf("NewFramer: %v", err)
}
err = framer.WriteFrame(f.frame)
checkZeroStreamId(t, name, "WriteFrame", err)
_, err = framer.ReadFrame()
checkZeroStreamId(t, name, "ReadFrame", err)
}
}
func checkZeroStreamId(t *testing.T, frame string, method string, err error) {
if err == nil {
t.Errorf("%s ZeroStreamId, no error on %s", method, frame)
return
}
eerr, ok := err.(*Error)
if !ok || eerr.Err != ZeroStreamId {
t.Errorf("%s ZeroStreamId, incorrect error %#v, frame %s", method, eerr, frame)
}
}

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// Copyright 2011 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 spdy implements the SPDY protocol (currently SPDY/3), described in
// http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3.
package spdy
import (
"bytes"
"compress/zlib"
"io"
"net/http"
)
// Version is the protocol version number that this package implements.
const Version = 3
// ControlFrameType stores the type field in a control frame header.
type ControlFrameType uint16
const (
TypeSynStream ControlFrameType = 0x0001
TypeSynReply = 0x0002
TypeRstStream = 0x0003
TypeSettings = 0x0004
TypePing = 0x0006
TypeGoAway = 0x0007
TypeHeaders = 0x0008
TypeWindowUpdate = 0x0009
)
// ControlFlags are the flags that can be set on a control frame.
type ControlFlags uint8
const (
ControlFlagFin ControlFlags = 0x01
ControlFlagUnidirectional = 0x02
ControlFlagSettingsClearSettings = 0x01
)
// DataFlags are the flags that can be set on a data frame.
type DataFlags uint8
const (
DataFlagFin DataFlags = 0x01
)
// MaxDataLength is the maximum number of bytes that can be stored in one frame.
const MaxDataLength = 1<<24 - 1
// headerValueSepator separates multiple header values.
const headerValueSeparator = "\x00"
// Frame is a single SPDY frame in its unpacked in-memory representation. Use
// Framer to read and write it.
type Frame interface {
write(f *Framer) error
}
// ControlFrameHeader contains all the fields in a control frame header,
// in its unpacked in-memory representation.
type ControlFrameHeader struct {
// Note, high bit is the "Control" bit.
version uint16 // spdy version number
frameType ControlFrameType
Flags ControlFlags
length uint32 // length of data field
}
type controlFrame interface {
Frame
read(h ControlFrameHeader, f *Framer) error
}
// StreamId represents a 31-bit value identifying the stream.
type StreamId uint32
// SynStreamFrame is the unpacked, in-memory representation of a SYN_STREAM
// frame.
type SynStreamFrame struct {
CFHeader ControlFrameHeader
StreamId StreamId
AssociatedToStreamId StreamId // stream id for a stream which this stream is associated to
Priority uint8 // priority of this frame (3-bit)
Slot uint8 // index in the server's credential vector of the client certificate
Headers http.Header
}
// SynReplyFrame is the unpacked, in-memory representation of a SYN_REPLY frame.
type SynReplyFrame struct {
CFHeader ControlFrameHeader
StreamId StreamId
Headers http.Header
}
// RstStreamStatus represents the status that led to a RST_STREAM.
type RstStreamStatus uint32
const (
ProtocolError RstStreamStatus = iota + 1
InvalidStream
RefusedStream
UnsupportedVersion
Cancel
InternalError
FlowControlError
StreamInUse
StreamAlreadyClosed
InvalidCredentials
FrameTooLarge
)
// RstStreamFrame is the unpacked, in-memory representation of a RST_STREAM
// frame.
type RstStreamFrame struct {
CFHeader ControlFrameHeader
StreamId StreamId
Status RstStreamStatus
}
// SettingsFlag represents a flag in a SETTINGS frame.
type SettingsFlag uint8
const (
FlagSettingsPersistValue SettingsFlag = 0x1
FlagSettingsPersisted = 0x2
)
// SettingsFlag represents the id of an id/value pair in a SETTINGS frame.
type SettingsId uint32
const (
SettingsUploadBandwidth SettingsId = iota + 1
SettingsDownloadBandwidth
SettingsRoundTripTime
SettingsMaxConcurrentStreams
SettingsCurrentCwnd
SettingsDownloadRetransRate
SettingsInitialWindowSize
SettingsClientCretificateVectorSize
)
// SettingsFlagIdValue is the unpacked, in-memory representation of the
// combined flag/id/value for a setting in a SETTINGS frame.
type SettingsFlagIdValue struct {
Flag SettingsFlag
Id SettingsId
Value uint32
}
// SettingsFrame is the unpacked, in-memory representation of a SPDY
// SETTINGS frame.
type SettingsFrame struct {
CFHeader ControlFrameHeader
FlagIdValues []SettingsFlagIdValue
}
// PingFrame is the unpacked, in-memory representation of a PING frame.
type PingFrame struct {
CFHeader ControlFrameHeader
Id uint32 // unique id for this ping, from server is even, from client is odd.
}
// GoAwayStatus represents the status in a GoAwayFrame.
type GoAwayStatus uint32
const (
GoAwayOK GoAwayStatus = iota
GoAwayProtocolError
GoAwayInternalError
)
// GoAwayFrame is the unpacked, in-memory representation of a GOAWAY frame.
type GoAwayFrame struct {
CFHeader ControlFrameHeader
LastGoodStreamId StreamId // last stream id which was accepted by sender
Status GoAwayStatus
}
// HeadersFrame is the unpacked, in-memory representation of a HEADERS frame.
type HeadersFrame struct {
CFHeader ControlFrameHeader
StreamId StreamId
Headers http.Header
}
// WindowUpdateFrame is the unpacked, in-memory representation of a
// WINDOW_UPDATE frame.
type WindowUpdateFrame struct {
CFHeader ControlFrameHeader
StreamId StreamId
DeltaWindowSize uint32 // additional number of bytes to existing window size
}
// TODO: Implement credential frame and related methods.
// DataFrame is the unpacked, in-memory representation of a DATA frame.
type DataFrame struct {
// Note, high bit is the "Control" bit. Should be 0 for data frames.
StreamId StreamId
Flags DataFlags
Data []byte // payload data of this frame
}
// A SPDY specific error.
type ErrorCode string
const (
UnlowercasedHeaderName ErrorCode = "header was not lowercased"
DuplicateHeaders = "multiple headers with same name"
WrongCompressedPayloadSize = "compressed payload size was incorrect"
UnknownFrameType = "unknown frame type"
InvalidControlFrame = "invalid control frame"
InvalidDataFrame = "invalid data frame"
InvalidHeaderPresent = "frame contained invalid header"
ZeroStreamId = "stream id zero is disallowed"
)
// Error contains both the type of error and additional values. StreamId is 0
// if Error is not associated with a stream.
type Error struct {
Err ErrorCode
StreamId StreamId
}
func (e *Error) Error() string {
return string(e.Err)
}
var invalidReqHeaders = map[string]bool{
"Connection": true,
"Host": true,
"Keep-Alive": true,
"Proxy-Connection": true,
"Transfer-Encoding": true,
}
var invalidRespHeaders = map[string]bool{
"Connection": true,
"Keep-Alive": true,
"Proxy-Connection": true,
"Transfer-Encoding": true,
}
// Framer handles serializing/deserializing SPDY frames, including compressing/
// decompressing payloads.
type Framer struct {
headerCompressionDisabled bool
w io.Writer
headerBuf *bytes.Buffer
headerCompressor *zlib.Writer
r io.Reader
headerReader io.LimitedReader
headerDecompressor io.ReadCloser
}
// NewFramer allocates a new Framer for a given SPDY connection, represented by
// a io.Writer and io.Reader. Note that Framer will read and write individual fields
// from/to the Reader and Writer, so the caller should pass in an appropriately
// buffered implementation to optimize performance.
func NewFramer(w io.Writer, r io.Reader) (*Framer, error) {
compressBuf := new(bytes.Buffer)
compressor, err := zlib.NewWriterLevelDict(compressBuf, zlib.BestCompression, []byte(headerDictionary))
if err != nil {
return nil, err
}
framer := &Framer{
w: w,
headerBuf: compressBuf,
headerCompressor: compressor,
r: r,
}
return framer, nil
}

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// Copyright 2011 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 spdy
import (
"encoding/binary"
"io"
"net/http"
"strings"
)
func (frame *SynStreamFrame) write(f *Framer) error {
return f.writeSynStreamFrame(frame)
}
func (frame *SynReplyFrame) write(f *Framer) error {
return f.writeSynReplyFrame(frame)
}
func (frame *RstStreamFrame) write(f *Framer) (err error) {
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeRstStream
frame.CFHeader.Flags = 0
frame.CFHeader.length = 8
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return
}
if frame.Status == 0 {
return &Error{InvalidControlFrame, frame.StreamId}
}
if err = binary.Write(f.w, binary.BigEndian, frame.Status); err != nil {
return
}
return
}
func (frame *SettingsFrame) write(f *Framer) (err error) {
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeSettings
frame.CFHeader.length = uint32(len(frame.FlagIdValues)*8 + 4)
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, uint32(len(frame.FlagIdValues))); err != nil {
return
}
for _, flagIdValue := range frame.FlagIdValues {
flagId := uint32(flagIdValue.Flag)<<24 | uint32(flagIdValue.Id)
if err = binary.Write(f.w, binary.BigEndian, flagId); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, flagIdValue.Value); err != nil {
return
}
}
return
}
func (frame *PingFrame) write(f *Framer) (err error) {
if frame.Id == 0 {
return &Error{ZeroStreamId, 0}
}
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypePing
frame.CFHeader.Flags = 0
frame.CFHeader.length = 4
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.Id); err != nil {
return
}
return
}
func (frame *GoAwayFrame) write(f *Framer) (err error) {
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeGoAway
frame.CFHeader.Flags = 0
frame.CFHeader.length = 8
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.LastGoodStreamId); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.Status); err != nil {
return
}
return nil
}
func (frame *HeadersFrame) write(f *Framer) error {
return f.writeHeadersFrame(frame)
}
func (frame *WindowUpdateFrame) write(f *Framer) (err error) {
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeWindowUpdate
frame.CFHeader.Flags = 0
frame.CFHeader.length = 8
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.DeltaWindowSize); err != nil {
return
}
return nil
}
func (frame *DataFrame) write(f *Framer) error {
return f.writeDataFrame(frame)
}
// WriteFrame writes a frame.
func (f *Framer) WriteFrame(frame Frame) error {
return frame.write(f)
}
func writeControlFrameHeader(w io.Writer, h ControlFrameHeader) error {
if err := binary.Write(w, binary.BigEndian, 0x8000|h.version); err != nil {
return err
}
if err := binary.Write(w, binary.BigEndian, h.frameType); err != nil {
return err
}
flagsAndLength := uint32(h.Flags)<<24 | h.length
if err := binary.Write(w, binary.BigEndian, flagsAndLength); err != nil {
return err
}
return nil
}
func writeHeaderValueBlock(w io.Writer, h http.Header) (n int, err error) {
n = 0
if err = binary.Write(w, binary.BigEndian, uint32(len(h))); err != nil {
return
}
n += 2
for name, values := range h {
if err = binary.Write(w, binary.BigEndian, uint32(len(name))); err != nil {
return
}
n += 2
name = strings.ToLower(name)
if _, err = io.WriteString(w, name); err != nil {
return
}
n += len(name)
v := strings.Join(values, headerValueSeparator)
if err = binary.Write(w, binary.BigEndian, uint32(len(v))); err != nil {
return
}
n += 2
if _, err = io.WriteString(w, v); err != nil {
return
}
n += len(v)
}
return
}
func (f *Framer) writeSynStreamFrame(frame *SynStreamFrame) (err error) {
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
// Marshal the headers.
var writer io.Writer = f.headerBuf
if !f.headerCompressionDisabled {
writer = f.headerCompressor
}
if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
return
}
if !f.headerCompressionDisabled {
f.headerCompressor.Flush()
}
// Set ControlFrameHeader.
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeSynStream
frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 10)
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return err
}
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return err
}
if err = binary.Write(f.w, binary.BigEndian, frame.AssociatedToStreamId); err != nil {
return err
}
if err = binary.Write(f.w, binary.BigEndian, frame.Priority<<5); err != nil {
return err
}
if err = binary.Write(f.w, binary.BigEndian, frame.Slot); err != nil {
return err
}
if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
return err
}
f.headerBuf.Reset()
return nil
}
func (f *Framer) writeSynReplyFrame(frame *SynReplyFrame) (err error) {
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
// Marshal the headers.
var writer io.Writer = f.headerBuf
if !f.headerCompressionDisabled {
writer = f.headerCompressor
}
if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
return
}
if !f.headerCompressionDisabled {
f.headerCompressor.Flush()
}
// Set ControlFrameHeader.
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeSynReply
frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 4)
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return
}
if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
return
}
f.headerBuf.Reset()
return
}
func (f *Framer) writeHeadersFrame(frame *HeadersFrame) (err error) {
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
// Marshal the headers.
var writer io.Writer = f.headerBuf
if !f.headerCompressionDisabled {
writer = f.headerCompressor
}
if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
return
}
if !f.headerCompressionDisabled {
f.headerCompressor.Flush()
}
// Set ControlFrameHeader.
frame.CFHeader.version = Version
frame.CFHeader.frameType = TypeHeaders
frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 4)
// Serialize frame to Writer.
if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
return
}
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return
}
if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
return
}
f.headerBuf.Reset()
return
}
func (f *Framer) writeDataFrame(frame *DataFrame) (err error) {
if frame.StreamId == 0 {
return &Error{ZeroStreamId, 0}
}
if frame.StreamId&0x80000000 != 0 || len(frame.Data) > MaxDataLength {
return &Error{InvalidDataFrame, frame.StreamId}
}
// Serialize frame to Writer.
if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
return
}
flagsAndLength := uint32(frame.Flags)<<24 | uint32(len(frame.Data))
if err = binary.Write(f.w, binary.BigEndian, flagsAndLength); err != nil {
return
}
if _, err = f.w.Write(frame.Data); err != nil {
return
}
return nil
}