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-rw-r--r--libgo/go/exp/spdy/types.go369
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diff --git a/libgo/go/exp/spdy/types.go b/libgo/go/exp/spdy/types.go
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--- a/libgo/go/exp/spdy/types.go
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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 (
- "bytes"
- "compress/zlib"
- "io"
- "net/http"
-)
-
-// Data Frame Format
-// +----------------------------------+
-// |0| Stream-ID (31bits) |
-// +----------------------------------+
-// | flags (8) | Length (24 bits) |
-// +----------------------------------+
-// | Data |
-// +----------------------------------+
-//
-// Control Frame Format
-// +----------------------------------+
-// |1| Version(15bits) | Type(16bits) |
-// +----------------------------------+
-// | flags (8) | Length (24 bits) |
-// +----------------------------------+
-// | Data |
-// +----------------------------------+
-//
-// Control Frame: SYN_STREAM
-// +----------------------------------+
-// |1|000000000000001|0000000000000001|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | >= 12
-// +----------------------------------+
-// |X| Stream-ID(31bits) |
-// +----------------------------------+
-// |X|Associated-To-Stream-ID (31bits)|
-// +----------------------------------+
-// |Pri| unused | Length (16bits)|
-// +----------------------------------+
-//
-// Control Frame: SYN_REPLY
-// +----------------------------------+
-// |1|000000000000001|0000000000000010|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | >= 8
-// +----------------------------------+
-// |X| Stream-ID(31bits) |
-// +----------------------------------+
-// | unused (16 bits)| Length (16bits)|
-// +----------------------------------+
-//
-// Control Frame: RST_STREAM
-// +----------------------------------+
-// |1|000000000000001|0000000000000011|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | >= 4
-// +----------------------------------+
-// |X| Stream-ID(31bits) |
-// +----------------------------------+
-// | Status code (32 bits) |
-// +----------------------------------+
-//
-// Control Frame: SETTINGS
-// +----------------------------------+
-// |1|000000000000001|0000000000000100|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) |
-// +----------------------------------+
-// | # of entries (32) |
-// +----------------------------------+
-//
-// Control Frame: NOOP
-// +----------------------------------+
-// |1|000000000000001|0000000000000101|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | = 0
-// +----------------------------------+
-//
-// Control Frame: PING
-// +----------------------------------+
-// |1|000000000000001|0000000000000110|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | = 4
-// +----------------------------------+
-// | Unique id (32 bits) |
-// +----------------------------------+
-//
-// Control Frame: GOAWAY
-// +----------------------------------+
-// |1|000000000000001|0000000000000111|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | = 4
-// +----------------------------------+
-// |X| Last-accepted-stream-id |
-// +----------------------------------+
-//
-// Control Frame: HEADERS
-// +----------------------------------+
-// |1|000000000000001|0000000000001000|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | >= 8
-// +----------------------------------+
-// |X| Stream-ID (31 bits) |
-// +----------------------------------+
-// | unused (16 bits)| Length (16bits)|
-// +----------------------------------+
-//
-// Control Frame: WINDOW_UPDATE
-// +----------------------------------+
-// |1|000000000000001|0000000000001001|
-// +----------------------------------+
-// | flags (8) | Length (24 bits) | = 8
-// +----------------------------------+
-// |X| Stream-ID (31 bits) |
-// +----------------------------------+
-// | Delta-Window-Size (32 bits) |
-// +----------------------------------+
-
-// Version is the protocol version number that this package implements.
-const Version = 2
-
-// ControlFrameType stores the type field in a control frame header.
-type ControlFrameType uint16
-
-// Control frame type constants
-const (
- TypeSynStream ControlFrameType = 0x0001
- TypeSynReply = 0x0002
- TypeRstStream = 0x0003
- TypeSettings = 0x0004
- TypeNoop = 0x0005
- 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
-)
-
-// DataFlags are the flags that can be set on a data frame.
-type DataFlags uint8
-
-const (
- DataFlagFin DataFlags = 0x01
- DataFlagCompressed = 0x02
-)
-
-// MaxDataLength is the maximum number of bytes that can be stored in one frame.
-const MaxDataLength = 1<<24 - 1
-
-// 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
- frameType ControlFrameType
- Flags ControlFlags
- length uint32
-}
-
-type controlFrame interface {
- Frame
- read(h ControlFrameHeader, f *Framer) error
-}
-
-// SynStreamFrame is the unpacked, in-memory representation of a SYN_STREAM
-// frame.
-type SynStreamFrame struct {
- CFHeader ControlFrameHeader
- StreamId uint32
- AssociatedToStreamId uint32
- // Note, only 2 highest bits currently used
- // Rest of Priority is unused.
- Priority uint16
- Headers http.Header
-}
-
-// SynReplyFrame is the unpacked, in-memory representation of a SYN_REPLY frame.
-type SynReplyFrame struct {
- CFHeader ControlFrameHeader
- StreamId uint32
- Headers http.Header
-}
-
-// StatusCode represents the status that led to a RST_STREAM
-type StatusCode uint32
-
-const (
- ProtocolError StatusCode = 1
- InvalidStream = 2
- RefusedStream = 3
- UnsupportedVersion = 4
- Cancel = 5
- InternalError = 6
- FlowControlError = 7
-)
-
-// RstStreamFrame is the unpacked, in-memory representation of a RST_STREAM
-// frame.
-type RstStreamFrame struct {
- CFHeader ControlFrameHeader
- StreamId uint32
- Status StatusCode
-}
-
-// 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 = 1
- SettingsDownloadBandwidth = 2
- SettingsRoundTripTime = 3
- SettingsMaxConcurrentStreams = 4
- SettingsCurrentCwnd = 5
-)
-
-// 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
-}
-
-// NoopFrame is the unpacked, in-memory representation of a NOOP frame.
-type NoopFrame struct {
- CFHeader ControlFrameHeader
-}
-
-// PingFrame is the unpacked, in-memory representation of a PING frame.
-type PingFrame struct {
- CFHeader ControlFrameHeader
- Id uint32
-}
-
-// GoAwayFrame is the unpacked, in-memory representation of a GOAWAY frame.
-type GoAwayFrame struct {
- CFHeader ControlFrameHeader
- LastGoodStreamId uint32
-}
-
-// HeadersFrame is the unpacked, in-memory representation of a HEADERS frame.
-type HeadersFrame struct {
- CFHeader ControlFrameHeader
- StreamId uint32
- Headers http.Header
-}
-
-// 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 uint32
- Flags DataFlags
- Data []byte
-}
-
-// 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" +
- "acceptaccept-charsetaccept-encodingaccept-languageauthorizationexpectfromhost" +
- "if-modified-sinceif-matchif-none-matchif-rangeif-unmodifiedsince" +
- "max-forwardsproxy-authorizationrangerefererteuser-agent" +
- "100101200201202203204205206300301302303304305306307400401402403404405406407408409410411412413414415416417500501502503504505" +
- "accept-rangesageetaglocationproxy-authenticatepublicretry-after" +
- "servervarywarningwww-authenticateallowcontent-basecontent-encodingcache-control" +
- "connectiondatetrailertransfer-encodingupgradeviawarning" +
- "content-languagecontent-lengthcontent-locationcontent-md5content-rangecontent-typeetagexpireslast-modifiedset-cookie" +
- "MondayTuesdayWednesdayThursdayFridaySaturdaySunday" +
- "JanFebMarAprMayJunJulAugSepOctNovDec" +
- "chunkedtext/htmlimage/pngimage/jpgimage/gifapplication/xmlapplication/xhtmltext/plainpublicmax-age" +
- "charset=iso-8859-1utf-8gzipdeflateHTTP/1.1statusversionurl\x00"
-
-// A SPDY specific error.
-type ErrorCode string
-
-const (
- UnlowercasedHeaderName ErrorCode = "header was not lowercased"
- DuplicateHeaders ErrorCode = "multiple headers with same name"
- WrongCompressedPayloadSize ErrorCode = "compressed payload size was incorrect"
- UnknownFrameType ErrorCode = "unknown frame type"
- InvalidControlFrame ErrorCode = "invalid control frame"
- InvalidDataFrame ErrorCode = "invalid data frame"
- InvalidHeaderPresent ErrorCode = "frame contained invalid header"
-)
-
-// 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 uint32
-}
-
-func (e *Error) Error() string {
- return string(e.Err)
-}
-
-var invalidReqHeaders = map[string]bool{
- "Connection": true,
- "Keep-Alive": true,
- "Proxy-Connection": true,
- "Transfer-Encoding": true,
-}
-
-var invalidRespHeaders = map[string]bool{
- "Connection": true,
- "Keep-Alive": 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, 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, 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
-}
generated by cgit v1.1 at 2024-08-20 20:07:45 +0000