mirror of
https://github.com/golang/go
synced 2024-11-12 10:20:27 -07:00
http/spdy: reorganize package.
R=bradfitz, rsc CC=golang-dev https://golang.org/cl/4524087
This commit is contained in:
parent
17bfa32fde
commit
bc3a72fa28
@ -6,7 +6,8 @@ include ../../../Make.inc
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TARG=http/spdy
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GOFILES=\
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framer.go\
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protocol.go\
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read.go\
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types.go\
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write.go\
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include ../../../Make.pkg
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@ -1,443 +0,0 @@
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package spdy
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import (
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"bytes"
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"encoding/binary"
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"compress/zlib"
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"http"
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"io"
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"os"
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"strconv"
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"strings"
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)
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type FramerError int
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const (
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Internal FramerError = iota
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InvalidControlFrame
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UnlowercasedHeaderName
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DuplicateHeaders
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UnknownFrameType
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InvalidDataFrame
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)
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func (e FramerError) String() string {
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switch e {
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case Internal:
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return "Internal"
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case InvalidControlFrame:
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return "InvalidControlFrame"
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case UnlowercasedHeaderName:
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return "UnlowercasedHeaderName"
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case DuplicateHeaders:
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return "DuplicateHeaders"
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case UnknownFrameType:
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return "UnknownFrameType"
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case InvalidDataFrame:
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return "InvalidDataFrame"
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}
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return "Error(" + strconv.Itoa(int(e)) + ")"
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}
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type corkedReader struct {
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r io.Reader
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ch chan int
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n int
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}
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func (cr *corkedReader) Read(p []byte) (int, os.Error) {
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if cr.n == 0 {
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cr.n = <-cr.ch
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}
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if len(p) > cr.n {
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p = p[:cr.n]
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}
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n, err := cr.r.Read(p)
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cr.n -= n
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return n, err
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}
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// Framer handles serializing/deserializing SPDY frames, including compressing/
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// decompressing payloads.
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type Framer struct {
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headerCompressionDisabled bool
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w io.Writer
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headerBuf *bytes.Buffer
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headerCompressor *zlib.Writer
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r io.Reader
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headerReader corkedReader
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headerDecompressor io.ReadCloser
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}
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// NewFramer allocates a new Framer for a given SPDY connection, repesented by
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// a io.Writer and io.Reader. Note that Framer will read and write individual fields
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// from/to the Reader and Writer, so the caller should pass in an appropriately
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// buffered implementation to optimize performance.
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func NewFramer(w io.Writer, r io.Reader) (*Framer, os.Error) {
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compressBuf := new(bytes.Buffer)
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compressor, err := zlib.NewWriterDict(compressBuf, zlib.BestCompression, []byte(HeaderDictionary))
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if err != nil {
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return nil, err
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}
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framer := &Framer{
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w: w,
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headerBuf: compressBuf,
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headerCompressor: compressor,
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r: r,
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}
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return framer, nil
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}
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func (f *Framer) uncorkHeaderDecompressor(payloadSize int) os.Error {
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if f.headerDecompressor != nil {
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f.headerReader.ch <- payloadSize
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return nil
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}
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f.headerReader = corkedReader{r: f.r, ch: make(chan int, 1), n: payloadSize}
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decompressor, err := zlib.NewReaderDict(&f.headerReader, []byte(HeaderDictionary))
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if err != nil {
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return err
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}
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f.headerDecompressor = decompressor
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return nil
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}
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// ReadFrame reads SPDY encoded data and returns a decompressed Frame.
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func (f *Framer) ReadFrame() (Frame, os.Error) {
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var firstWord uint32
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if err := binary.Read(f.r, binary.BigEndian, &firstWord); err != nil {
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return nil, err
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}
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if (firstWord & 0x80000000) != 0 {
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frameType := ControlFrameType(firstWord & 0xffff)
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version := uint16(0x7fff & (firstWord >> 16))
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return f.parseControlFrame(version, frameType)
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}
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return f.parseDataFrame(firstWord & 0x7fffffff)
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}
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func (f *Framer) parseControlFrame(version uint16, frameType ControlFrameType) (Frame, os.Error) {
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var length uint32
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if err := binary.Read(f.r, binary.BigEndian, &length); err != nil {
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return nil, err
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}
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flags := ControlFlags((length & 0xff000000) >> 24)
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length &= 0xffffff
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header := ControlFrameHeader{version, frameType, flags, length}
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cframe, err := newControlFrame(frameType)
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if err != nil {
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return nil, err
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}
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if err = cframe.read(header, f); err != nil {
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return nil, err
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}
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return cframe, nil
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}
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func parseHeaderValueBlock(r io.Reader) (http.Header, os.Error) {
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var numHeaders uint16
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if err := binary.Read(r, binary.BigEndian, &numHeaders); err != nil {
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return nil, err
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}
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h := make(http.Header, int(numHeaders))
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for i := 0; i < int(numHeaders); i++ {
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var length uint16
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if err := binary.Read(r, binary.BigEndian, &length); err != nil {
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return nil, err
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}
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nameBytes := make([]byte, length)
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if _, err := io.ReadFull(r, nameBytes); err != nil {
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return nil, err
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}
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name := string(nameBytes)
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if name != strings.ToLower(name) {
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return nil, UnlowercasedHeaderName
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}
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if h[name] != nil {
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return nil, DuplicateHeaders
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}
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if err := binary.Read(r, binary.BigEndian, &length); err != nil {
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return nil, err
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}
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value := make([]byte, length)
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if _, err := io.ReadFull(r, value); err != nil {
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return nil, err
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}
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valueList := strings.Split(string(value), "\x00", -1)
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for _, v := range valueList {
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h.Add(name, v)
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}
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}
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return h, nil
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}
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func (f *Framer) readSynStreamFrame(h ControlFrameHeader, frame *SynStreamFrame) os.Error {
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frame.CFHeader = h
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var err os.Error
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if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
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return err
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}
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if err = binary.Read(f.r, binary.BigEndian, &frame.AssociatedToStreamId); err != nil {
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return err
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}
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if err = binary.Read(f.r, binary.BigEndian, &frame.Priority); err != nil {
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return err
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}
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frame.Priority >>= 14
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reader := f.r
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if !f.headerCompressionDisabled {
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f.uncorkHeaderDecompressor(int(h.length - 10))
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reader = f.headerDecompressor
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}
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frame.Headers, err = parseHeaderValueBlock(reader)
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if err != nil {
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return err
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}
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return nil
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}
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func (f *Framer) readSynReplyFrame(h ControlFrameHeader, frame *SynReplyFrame) os.Error {
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frame.CFHeader = h
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var err os.Error
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if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
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return err
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}
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var unused uint16
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if err = binary.Read(f.r, binary.BigEndian, &unused); err != nil {
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return err
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}
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reader := f.r
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if !f.headerCompressionDisabled {
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f.uncorkHeaderDecompressor(int(h.length - 6))
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reader = f.headerDecompressor
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}
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frame.Headers, err = parseHeaderValueBlock(reader)
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if err != nil {
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return err
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}
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return nil
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}
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func (f *Framer) readHeadersFrame(h ControlFrameHeader, frame *HeadersFrame) os.Error {
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frame.CFHeader = h
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var err os.Error
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if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
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return err
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}
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var unused uint16
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if err = binary.Read(f.r, binary.BigEndian, &unused); err != nil {
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return err
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}
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reader := f.r
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if !f.headerCompressionDisabled {
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f.uncorkHeaderDecompressor(int(h.length - 6))
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reader = f.headerDecompressor
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}
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frame.Headers, err = parseHeaderValueBlock(reader)
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if err != nil {
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return err
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}
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return nil
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}
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func (f *Framer) parseDataFrame(streamId uint32) (*DataFrame, os.Error) {
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var length uint32
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if err := binary.Read(f.r, binary.BigEndian, &length); err != nil {
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return nil, err
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}
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var frame DataFrame
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frame.StreamId = streamId
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frame.Flags = DataFlags(length >> 24)
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length &= 0xffffff
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frame.Data = make([]byte, length)
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// TODO(willchan): Support compressed data frames.
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if _, err := io.ReadFull(f.r, frame.Data); err != nil {
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return nil, err
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}
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return &frame, nil
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}
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// WriteFrame writes a frame.
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func (f *Framer) WriteFrame(frame Frame) os.Error {
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return frame.write(f)
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}
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func writeControlFrameHeader(w io.Writer, h ControlFrameHeader) os.Error {
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if err := binary.Write(w, binary.BigEndian, 0x8000|h.version); err != nil {
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return err
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}
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if err := binary.Write(w, binary.BigEndian, h.frameType); err != nil {
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return err
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}
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flagsAndLength := (uint32(h.Flags) << 24) | h.length
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if err := binary.Write(w, binary.BigEndian, flagsAndLength); err != nil {
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return err
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}
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return nil
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}
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func writeHeaderValueBlock(w io.Writer, h http.Header) (n int, err os.Error) {
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n = 0
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if err = binary.Write(w, binary.BigEndian, uint16(len(h))); err != nil {
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return
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}
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n += 2
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for name, values := range h {
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if err = binary.Write(w, binary.BigEndian, uint16(len(name))); err != nil {
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return
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}
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n += 2
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name = strings.ToLower(name)
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if _, err = io.WriteString(w, name); err != nil {
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return
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}
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n += len(name)
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v := strings.Join(values, "\x00")
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if err = binary.Write(w, binary.BigEndian, uint16(len(v))); err != nil {
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return
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}
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n += 2
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if _, err = io.WriteString(w, v); err != nil {
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return
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}
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n += len(v)
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}
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return
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}
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func (f *Framer) writeSynStreamFrame(frame *SynStreamFrame) (err os.Error) {
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeSynStream
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 10)
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// Serialize frame to Writer
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.AssociatedToStreamId); err != nil {
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return err
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.Priority<<14); err != nil {
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return err
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return err
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}
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f.headerBuf.Reset()
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return nil
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}
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func (f *Framer) writeSynReplyFrame(frame *SynReplyFrame) (err os.Error) {
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeSynReply
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 6)
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// Serialize frame to Writer
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, uint16(0)); err != nil {
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return
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return
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}
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f.headerBuf.Reset()
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return
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}
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func (f *Framer) writeHeadersFrame(frame *HeadersFrame) (err os.Error) {
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// Marshal the headers.
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var writer io.Writer = f.headerBuf
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if !f.headerCompressionDisabled {
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writer = f.headerCompressor
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}
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if _, err = writeHeaderValueBlock(writer, frame.Headers); err != nil {
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return
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}
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if !f.headerCompressionDisabled {
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f.headerCompressor.Flush()
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}
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// Set ControlFrameHeader
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frame.CFHeader.version = Version
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frame.CFHeader.frameType = TypeHeaders
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frame.CFHeader.length = uint32(len(f.headerBuf.Bytes()) + 6)
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// Serialize frame to Writer
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if err = writeControlFrameHeader(f.w, frame.CFHeader); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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if err = binary.Write(f.w, binary.BigEndian, uint16(0)); err != nil {
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return
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}
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if _, err = f.w.Write(f.headerBuf.Bytes()); err != nil {
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return
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}
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f.headerBuf.Reset()
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return
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}
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func (f *Framer) writeDataFrame(frame *DataFrame) (err os.Error) {
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// Validate DataFrame
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if frame.StreamId&0x80000000 != 0 || len(frame.Data) >= 0x0f000000 {
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return InvalidDataFrame
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}
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// TODO(willchan): Support data compression.
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// Serialize frame to Writer
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if err = binary.Write(f.w, binary.BigEndian, frame.StreamId); err != nil {
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return
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}
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flagsAndLength := (uint32(frame.Flags) << 24) | uint32(len(frame.Data))
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if err = binary.Write(f.w, binary.BigEndian, flagsAndLength); err != nil {
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return
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}
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if _, err = f.w.Write(frame.Data); err != nil {
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return
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}
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return nil
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}
|
287
src/pkg/http/spdy/read.go
Normal file
287
src/pkg/http/spdy/read.go
Normal file
@ -0,0 +1,287 @@
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package spdy
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import (
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"compress/zlib"
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"encoding/binary"
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"http"
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"io"
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"os"
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"strings"
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)
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func (frame *SynStreamFrame) read(h ControlFrameHeader, f *Framer) os.Error {
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return f.readSynStreamFrame(h, frame)
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}
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|
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func (frame *SynReplyFrame) read(h ControlFrameHeader, f *Framer) os.Error {
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return f.readSynReplyFrame(h, frame)
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}
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func (frame *RstStreamFrame) read(h ControlFrameHeader, f *Framer) os.Error {
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frame.CFHeader = h
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if err := binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
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return err
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}
|
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if err := binary.Read(f.r, binary.BigEndian, &frame.Status); err != nil {
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return err
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}
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return nil
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}
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func (frame *SettingsFrame) read(h ControlFrameHeader, f *Framer) os.Error {
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frame.CFHeader = h
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var numSettings uint32
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if err := binary.Read(f.r, binary.BigEndian, &numSettings); err != nil {
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return err
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}
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frame.FlagIdValues = make([]SettingsFlagIdValue, numSettings)
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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 *NoopFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *PingFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
if err := binary.Read(f.r, binary.BigEndian, &frame.Id); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *GoAwayFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
if err := binary.Read(f.r, binary.BigEndian, &frame.LastGoodStreamId); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *HeadersFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
return f.readHeadersFrame(h, frame)
|
||||
}
|
||||
|
||||
func newControlFrame(frameType ControlFrameType) (controlFrame, os.Error) {
|
||||
ctor, ok := cframeCtor[frameType]
|
||||
if !ok {
|
||||
return nil, 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) },
|
||||
TypeNoop: func() controlFrame { return new(NoopFrame) },
|
||||
TypePing: func() controlFrame { return new(PingFrame) },
|
||||
TypeGoAway: func() controlFrame { return new(GoAwayFrame) },
|
||||
TypeHeaders: func() controlFrame { return new(HeadersFrame) },
|
||||
// TODO(willchan): Add TypeWindowUpdate
|
||||
}
|
||||
|
||||
type corkedReader struct {
|
||||
r io.Reader
|
||||
ch chan int
|
||||
n int
|
||||
}
|
||||
|
||||
func (cr *corkedReader) Read(p []byte) (int, os.Error) {
|
||||
if cr.n == 0 {
|
||||
cr.n = <-cr.ch
|
||||
}
|
||||
if len(p) > cr.n {
|
||||
p = p[:cr.n]
|
||||
}
|
||||
n, err := cr.r.Read(p)
|
||||
cr.n -= n
|
||||
return n, err
|
||||
}
|
||||
|
||||
func (f *Framer) uncorkHeaderDecompressor(payloadSize int) os.Error {
|
||||
if f.headerDecompressor != nil {
|
||||
f.headerReader.ch <- payloadSize
|
||||
return nil
|
||||
}
|
||||
f.headerReader = corkedReader{r: f.r, ch: make(chan int, 1), 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, os.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(0x7fff & (firstWord >> 16))
|
||||
return f.parseControlFrame(version, frameType)
|
||||
}
|
||||
return f.parseDataFrame(firstWord & 0x7fffffff)
|
||||
}
|
||||
|
||||
func (f *Framer) parseControlFrame(version uint16, frameType ControlFrameType) (Frame, os.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) (http.Header, os.Error) {
|
||||
var numHeaders uint16
|
||||
if err := binary.Read(r, binary.BigEndian, &numHeaders); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
h := make(http.Header, int(numHeaders))
|
||||
for i := 0; i < int(numHeaders); i++ {
|
||||
var length uint16
|
||||
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) {
|
||||
return nil, UnlowercasedHeaderName
|
||||
}
|
||||
if h[name] != nil {
|
||||
return nil, DuplicateHeaders
|
||||
}
|
||||
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), "\x00", -1)
|
||||
for _, v := range valueList {
|
||||
h.Add(name, v)
|
||||
}
|
||||
}
|
||||
return h, nil
|
||||
}
|
||||
|
||||
func (f *Framer) readSynStreamFrame(h ControlFrameHeader, frame *SynStreamFrame) os.Error {
|
||||
frame.CFHeader = h
|
||||
var err os.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 >>= 14
|
||||
|
||||
reader := f.r
|
||||
if !f.headerCompressionDisabled {
|
||||
f.uncorkHeaderDecompressor(int(h.length - 10))
|
||||
reader = f.headerDecompressor
|
||||
}
|
||||
|
||||
frame.Headers, err = parseHeaderValueBlock(reader)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *Framer) readSynReplyFrame(h ControlFrameHeader, frame *SynReplyFrame) os.Error {
|
||||
frame.CFHeader = h
|
||||
var err os.Error
|
||||
if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
|
||||
return err
|
||||
}
|
||||
var unused uint16
|
||||
if err = binary.Read(f.r, binary.BigEndian, &unused); err != nil {
|
||||
return err
|
||||
}
|
||||
reader := f.r
|
||||
if !f.headerCompressionDisabled {
|
||||
f.uncorkHeaderDecompressor(int(h.length - 6))
|
||||
reader = f.headerDecompressor
|
||||
}
|
||||
frame.Headers, err = parseHeaderValueBlock(reader)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *Framer) readHeadersFrame(h ControlFrameHeader, frame *HeadersFrame) os.Error {
|
||||
frame.CFHeader = h
|
||||
var err os.Error
|
||||
if err = binary.Read(f.r, binary.BigEndian, &frame.StreamId); err != nil {
|
||||
return err
|
||||
}
|
||||
var unused uint16
|
||||
if err = binary.Read(f.r, binary.BigEndian, &unused); err != nil {
|
||||
return err
|
||||
}
|
||||
reader := f.r
|
||||
if !f.headerCompressionDisabled {
|
||||
f.uncorkHeaderDecompressor(int(h.length - 6))
|
||||
reader = f.headerDecompressor
|
||||
}
|
||||
frame.Headers, err = parseHeaderValueBlock(reader)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *Framer) parseDataFrame(streamId uint32) (*DataFrame, os.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)
|
||||
// TODO(willchan): Support compressed data frames.
|
||||
if _, err := io.ReadFull(f.r, frame.Data); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &frame, nil
|
||||
}
|
@ -2,16 +2,15 @@
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Package spdy is an incomplete implementation of the SPDY protocol.
|
||||
//
|
||||
// The implementation follows draft 2 of the spec:
|
||||
// https://sites.google.com/a/chromium.org/dev/spdy/spdy-protocol/spdy-protocol-draft2
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"bytes"
|
||||
"compress/zlib"
|
||||
"http"
|
||||
"io"
|
||||
"os"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
// Data Frame Format
|
||||
@ -193,14 +192,6 @@ type SynStreamFrame struct {
|
||||
Headers http.Header
|
||||
}
|
||||
|
||||
func (frame *SynStreamFrame) write(f *Framer) os.Error {
|
||||
return f.writeSynStreamFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *SynStreamFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
return f.readSynStreamFrame(h, frame)
|
||||
}
|
||||
|
||||
// SynReplyFrame is the unpacked, in-memory representation of a SYN_REPLY frame.
|
||||
type SynReplyFrame struct {
|
||||
CFHeader ControlFrameHeader
|
||||
@ -208,14 +199,6 @@ type SynReplyFrame struct {
|
||||
Headers http.Header
|
||||
}
|
||||
|
||||
func (frame *SynReplyFrame) write(f *Framer) os.Error {
|
||||
return f.writeSynReplyFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *SynReplyFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
return f.readSynReplyFrame(h, frame)
|
||||
}
|
||||
|
||||
// StatusCode represents the status that led to a RST_STREAM
|
||||
type StatusCode uint32
|
||||
|
||||
@ -237,35 +220,6 @@ type RstStreamFrame struct {
|
||||
Status StatusCode
|
||||
}
|
||||
|
||||
func (frame *RstStreamFrame) write(f *Framer) (err os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeRstStream
|
||||
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.Status); err != nil {
|
||||
return
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (frame *RstStreamFrame) read(h ControlFrameHeader, f *Framer) os.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
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// SettingsFlag represents a flag in a SETTINGS frame.
|
||||
type SettingsFlag uint8
|
||||
|
||||
@ -300,126 +254,23 @@ type SettingsFrame struct {
|
||||
FlagIdValues []SettingsFlagIdValue
|
||||
}
|
||||
|
||||
func (frame *SettingsFrame) write(f *Framer) (err os.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 *SettingsFrame) read(h ControlFrameHeader, f *Framer) os.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
|
||||
}
|
||||
|
||||
// NoopFrame is the unpacked, in-memory representation of a NOOP frame.
|
||||
type NoopFrame struct {
|
||||
CFHeader ControlFrameHeader
|
||||
}
|
||||
|
||||
func (frame *NoopFrame) write(f *Framer) os.Error {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeNoop
|
||||
|
||||
// Serialize frame to Writer
|
||||
return writeControlFrameHeader(f.w, frame.CFHeader)
|
||||
}
|
||||
|
||||
func (frame *NoopFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
return nil
|
||||
}
|
||||
|
||||
// PingFrame is the unpacked, in-memory representation of a PING frame.
|
||||
type PingFrame struct {
|
||||
CFHeader ControlFrameHeader
|
||||
Id uint32
|
||||
}
|
||||
|
||||
func (frame *PingFrame) write(f *Framer) (err os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypePing
|
||||
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 *PingFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
if err := binary.Read(f.r, binary.BigEndian, &frame.Id); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// GoAwayFrame is the unpacked, in-memory representation of a GOAWAY frame.
|
||||
type GoAwayFrame struct {
|
||||
CFHeader ControlFrameHeader
|
||||
LastGoodStreamId uint32
|
||||
}
|
||||
|
||||
func (frame *GoAwayFrame) write(f *Framer) (err os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeGoAway
|
||||
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.LastGoodStreamId); err != nil {
|
||||
return
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *GoAwayFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
frame.CFHeader = h
|
||||
if err := binary.Read(f.r, binary.BigEndian, &frame.LastGoodStreamId); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// HeadersFrame is the unpacked, in-memory representation of a HEADERS frame.
|
||||
type HeadersFrame struct {
|
||||
CFHeader ControlFrameHeader
|
||||
@ -427,34 +278,6 @@ type HeadersFrame struct {
|
||||
Headers http.Header
|
||||
}
|
||||
|
||||
func (frame *HeadersFrame) write(f *Framer) os.Error {
|
||||
return f.writeHeadersFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *HeadersFrame) read(h ControlFrameHeader, f *Framer) os.Error {
|
||||
return f.readHeadersFrame(h, frame)
|
||||
}
|
||||
|
||||
func newControlFrame(frameType ControlFrameType) (controlFrame, os.Error) {
|
||||
ctor, ok := cframeCtor[frameType]
|
||||
if !ok {
|
||||
return nil, 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) },
|
||||
TypeNoop: func() controlFrame { return new(NoopFrame) },
|
||||
TypePing: func() controlFrame { return new(PingFrame) },
|
||||
TypeGoAway: func() controlFrame { return new(GoAwayFrame) },
|
||||
TypeHeaders: func() controlFrame { return new(HeadersFrame) },
|
||||
// TODO(willchan): Add TypeWindowUpdate
|
||||
}
|
||||
|
||||
// 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.
|
||||
@ -463,10 +286,6 @@ type DataFrame struct {
|
||||
Data []byte
|
||||
}
|
||||
|
||||
func (frame *DataFrame) write(f *Framer) os.Error {
|
||||
return f.writeDataFrame(frame)
|
||||
}
|
||||
|
||||
// HeaderDictionary is the dictionary sent to the zlib compressor/decompressor.
|
||||
// Even though the specification states there is no null byte at the end, Chrome sends it.
|
||||
const HeaderDictionary = "optionsgetheadpostputdeletetrace" +
|
||||
@ -482,3 +301,63 @@ const HeaderDictionary = "optionsgetheadpostputdeletetrace" +
|
||||
"JanFebMarAprMayJunJulAugSepOctNovDec" +
|
||||
"chunkedtext/htmlimage/pngimage/jpgimage/gifapplication/xmlapplication/xhtmltext/plainpublicmax-age" +
|
||||
"charset=iso-8859-1utf-8gzipdeflateHTTP/1.1statusversionurl\x00"
|
||||
|
||||
type FramerError int
|
||||
|
||||
const (
|
||||
Internal FramerError = iota
|
||||
InvalidControlFrame
|
||||
UnlowercasedHeaderName
|
||||
DuplicateHeaders
|
||||
UnknownFrameType
|
||||
InvalidDataFrame
|
||||
)
|
||||
|
||||
func (e FramerError) String() string {
|
||||
switch e {
|
||||
case Internal:
|
||||
return "Internal"
|
||||
case InvalidControlFrame:
|
||||
return "InvalidControlFrame"
|
||||
case UnlowercasedHeaderName:
|
||||
return "UnlowercasedHeaderName"
|
||||
case DuplicateHeaders:
|
||||
return "DuplicateHeaders"
|
||||
case UnknownFrameType:
|
||||
return "UnknownFrameType"
|
||||
case InvalidDataFrame:
|
||||
return "InvalidDataFrame"
|
||||
}
|
||||
return "Error(" + strconv.Itoa(int(e)) + ")"
|
||||
}
|
||||
|
||||
// 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 corkedReader
|
||||
headerDecompressor io.ReadCloser
|
||||
}
|
||||
|
||||
// NewFramer allocates a new Framer for a given SPDY connection, repesented 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, os.Error) {
|
||||
compressBuf := new(bytes.Buffer)
|
||||
compressor, err := zlib.NewWriterDict(compressBuf, zlib.BestCompression, []byte(HeaderDictionary))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
framer := &Framer{
|
||||
w: w,
|
||||
headerBuf: compressBuf,
|
||||
headerCompressor: compressor,
|
||||
r: r,
|
||||
}
|
||||
return framer, nil
|
||||
}
|
287
src/pkg/http/spdy/write.go
Normal file
287
src/pkg/http/spdy/write.go
Normal file
@ -0,0 +1,287 @@
|
||||
// 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"
|
||||
"http"
|
||||
"io"
|
||||
"os"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func (frame *SynStreamFrame) write(f *Framer) os.Error {
|
||||
return f.writeSynStreamFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *SynReplyFrame) write(f *Framer) os.Error {
|
||||
return f.writeSynReplyFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *RstStreamFrame) write(f *Framer) (err os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeRstStream
|
||||
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.Status); err != nil {
|
||||
return
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (frame *SettingsFrame) write(f *Framer) (err os.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 *NoopFrame) write(f *Framer) os.Error {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeNoop
|
||||
|
||||
// Serialize frame to Writer
|
||||
return writeControlFrameHeader(f.w, frame.CFHeader)
|
||||
}
|
||||
|
||||
func (frame *PingFrame) write(f *Framer) (err os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypePing
|
||||
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 os.Error) {
|
||||
frame.CFHeader.version = Version
|
||||
frame.CFHeader.frameType = TypeGoAway
|
||||
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.LastGoodStreamId); err != nil {
|
||||
return
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *HeadersFrame) write(f *Framer) os.Error {
|
||||
return f.writeHeadersFrame(frame)
|
||||
}
|
||||
|
||||
func (frame *DataFrame) write(f *Framer) os.Error {
|
||||
return f.writeDataFrame(frame)
|
||||
}
|
||||
|
||||
// WriteFrame writes a frame.
|
||||
func (f *Framer) WriteFrame(frame Frame) os.Error {
|
||||
return frame.write(f)
|
||||
}
|
||||
|
||||
func writeControlFrameHeader(w io.Writer, h ControlFrameHeader) os.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 os.Error) {
|
||||
n = 0
|
||||
if err = binary.Write(w, binary.BigEndian, uint16(len(h))); err != nil {
|
||||
return
|
||||
}
|
||||
n += 2
|
||||
for name, values := range h {
|
||||
if err = binary.Write(w, binary.BigEndian, uint16(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, "\x00")
|
||||
if err = binary.Write(w, binary.BigEndian, uint16(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 os.Error) {
|
||||
// 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<<14); 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 os.Error) {
|
||||
// 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()) + 6)
|
||||
|
||||
// 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, uint16(0)); 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 os.Error) {
|
||||
// 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()) + 6)
|
||||
|
||||
// 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, uint16(0)); 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 os.Error) {
|
||||
// Validate DataFrame
|
||||
if frame.StreamId&0x80000000 != 0 || len(frame.Data) >= 0x0f000000 {
|
||||
return InvalidDataFrame
|
||||
}
|
||||
|
||||
// TODO(willchan): Support data compression.
|
||||
// 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
|
||||
}
|
Loading…
Reference in New Issue
Block a user