846 lines
22 KiB
Go
846 lines
22 KiB
Go
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// Copyright (c) 2012-2015 Ugorji Nwoke. All rights reserved.
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// Use of this source code is governed by a MIT license found in the LICENSE file.
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/*
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MSGPACK
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Msgpack-c implementation powers the c, c++, python, ruby, etc libraries.
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We need to maintain compatibility with it and how it encodes integer values
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without caring about the type.
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For compatibility with behaviour of msgpack-c reference implementation:
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- Go intX (>0) and uintX
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IS ENCODED AS
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msgpack +ve fixnum, unsigned
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- Go intX (<0)
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IS ENCODED AS
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msgpack -ve fixnum, signed
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*/
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package codec
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import (
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"fmt"
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"io"
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"math"
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"net/rpc"
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"reflect"
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)
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const (
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mpPosFixNumMin byte = 0x00
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mpPosFixNumMax = 0x7f
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mpFixMapMin = 0x80
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mpFixMapMax = 0x8f
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mpFixArrayMin = 0x90
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mpFixArrayMax = 0x9f
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mpFixStrMin = 0xa0
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mpFixStrMax = 0xbf
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mpNil = 0xc0
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_ = 0xc1
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mpFalse = 0xc2
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mpTrue = 0xc3
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mpFloat = 0xca
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mpDouble = 0xcb
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mpUint8 = 0xcc
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mpUint16 = 0xcd
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mpUint32 = 0xce
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mpUint64 = 0xcf
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mpInt8 = 0xd0
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mpInt16 = 0xd1
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mpInt32 = 0xd2
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mpInt64 = 0xd3
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// extensions below
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mpBin8 = 0xc4
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mpBin16 = 0xc5
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mpBin32 = 0xc6
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mpExt8 = 0xc7
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mpExt16 = 0xc8
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mpExt32 = 0xc9
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mpFixExt1 = 0xd4
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mpFixExt2 = 0xd5
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mpFixExt4 = 0xd6
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mpFixExt8 = 0xd7
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mpFixExt16 = 0xd8
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mpStr8 = 0xd9 // new
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mpStr16 = 0xda
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mpStr32 = 0xdb
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mpArray16 = 0xdc
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mpArray32 = 0xdd
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mpMap16 = 0xde
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mpMap32 = 0xdf
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mpNegFixNumMin = 0xe0
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mpNegFixNumMax = 0xff
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)
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// MsgpackSpecRpcMultiArgs is a special type which signifies to the MsgpackSpecRpcCodec
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// that the backend RPC service takes multiple arguments, which have been arranged
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// in sequence in the slice.
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//
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// The Codec then passes it AS-IS to the rpc service (without wrapping it in an
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// array of 1 element).
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type MsgpackSpecRpcMultiArgs []interface{}
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// A MsgpackContainer type specifies the different types of msgpackContainers.
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type msgpackContainerType struct {
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fixCutoff int
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bFixMin, b8, b16, b32 byte
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hasFixMin, has8, has8Always bool
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}
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var (
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msgpackContainerStr = msgpackContainerType{32, mpFixStrMin, mpStr8, mpStr16, mpStr32, true, true, false}
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msgpackContainerBin = msgpackContainerType{0, 0, mpBin8, mpBin16, mpBin32, false, true, true}
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msgpackContainerList = msgpackContainerType{16, mpFixArrayMin, 0, mpArray16, mpArray32, true, false, false}
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msgpackContainerMap = msgpackContainerType{16, mpFixMapMin, 0, mpMap16, mpMap32, true, false, false}
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)
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//---------------------------------------------
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type msgpackEncDriver struct {
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noBuiltInTypes
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encNoSeparator
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e *Encoder
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w encWriter
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h *MsgpackHandle
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x [8]byte
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}
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func (e *msgpackEncDriver) EncodeNil() {
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e.w.writen1(mpNil)
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}
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func (e *msgpackEncDriver) EncodeInt(i int64) {
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if i >= 0 {
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e.EncodeUint(uint64(i))
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} else if i >= -32 {
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e.w.writen1(byte(i))
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} else if i >= math.MinInt8 {
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e.w.writen2(mpInt8, byte(i))
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} else if i >= math.MinInt16 {
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e.w.writen1(mpInt16)
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bigenHelper{e.x[:2], e.w}.writeUint16(uint16(i))
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} else if i >= math.MinInt32 {
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e.w.writen1(mpInt32)
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bigenHelper{e.x[:4], e.w}.writeUint32(uint32(i))
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} else {
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e.w.writen1(mpInt64)
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bigenHelper{e.x[:8], e.w}.writeUint64(uint64(i))
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}
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}
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func (e *msgpackEncDriver) EncodeUint(i uint64) {
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if i <= math.MaxInt8 {
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e.w.writen1(byte(i))
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} else if i <= math.MaxUint8 {
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e.w.writen2(mpUint8, byte(i))
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} else if i <= math.MaxUint16 {
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e.w.writen1(mpUint16)
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bigenHelper{e.x[:2], e.w}.writeUint16(uint16(i))
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} else if i <= math.MaxUint32 {
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e.w.writen1(mpUint32)
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bigenHelper{e.x[:4], e.w}.writeUint32(uint32(i))
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} else {
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e.w.writen1(mpUint64)
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bigenHelper{e.x[:8], e.w}.writeUint64(uint64(i))
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}
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}
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func (e *msgpackEncDriver) EncodeBool(b bool) {
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if b {
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e.w.writen1(mpTrue)
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} else {
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e.w.writen1(mpFalse)
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}
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}
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func (e *msgpackEncDriver) EncodeFloat32(f float32) {
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e.w.writen1(mpFloat)
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bigenHelper{e.x[:4], e.w}.writeUint32(math.Float32bits(f))
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}
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func (e *msgpackEncDriver) EncodeFloat64(f float64) {
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e.w.writen1(mpDouble)
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bigenHelper{e.x[:8], e.w}.writeUint64(math.Float64bits(f))
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}
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func (e *msgpackEncDriver) EncodeExt(v interface{}, xtag uint64, ext Ext, _ *Encoder) {
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bs := ext.WriteExt(v)
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if bs == nil {
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e.EncodeNil()
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return
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}
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if e.h.WriteExt {
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e.encodeExtPreamble(uint8(xtag), len(bs))
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e.w.writeb(bs)
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} else {
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e.EncodeStringBytes(c_RAW, bs)
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}
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}
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func (e *msgpackEncDriver) EncodeRawExt(re *RawExt, _ *Encoder) {
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e.encodeExtPreamble(uint8(re.Tag), len(re.Data))
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e.w.writeb(re.Data)
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}
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func (e *msgpackEncDriver) encodeExtPreamble(xtag byte, l int) {
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if l == 1 {
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e.w.writen2(mpFixExt1, xtag)
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} else if l == 2 {
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e.w.writen2(mpFixExt2, xtag)
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} else if l == 4 {
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e.w.writen2(mpFixExt4, xtag)
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} else if l == 8 {
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e.w.writen2(mpFixExt8, xtag)
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} else if l == 16 {
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e.w.writen2(mpFixExt16, xtag)
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} else if l < 256 {
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e.w.writen2(mpExt8, byte(l))
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e.w.writen1(xtag)
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} else if l < 65536 {
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e.w.writen1(mpExt16)
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bigenHelper{e.x[:2], e.w}.writeUint16(uint16(l))
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e.w.writen1(xtag)
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} else {
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e.w.writen1(mpExt32)
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bigenHelper{e.x[:4], e.w}.writeUint32(uint32(l))
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e.w.writen1(xtag)
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}
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}
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func (e *msgpackEncDriver) EncodeArrayStart(length int) {
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e.writeContainerLen(msgpackContainerList, length)
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}
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func (e *msgpackEncDriver) EncodeMapStart(length int) {
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e.writeContainerLen(msgpackContainerMap, length)
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}
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func (e *msgpackEncDriver) EncodeString(c charEncoding, s string) {
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if c == c_RAW && e.h.WriteExt {
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e.writeContainerLen(msgpackContainerBin, len(s))
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} else {
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e.writeContainerLen(msgpackContainerStr, len(s))
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}
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if len(s) > 0 {
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e.w.writestr(s)
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}
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}
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func (e *msgpackEncDriver) EncodeSymbol(v string) {
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e.EncodeString(c_UTF8, v)
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}
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func (e *msgpackEncDriver) EncodeStringBytes(c charEncoding, bs []byte) {
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if c == c_RAW && e.h.WriteExt {
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e.writeContainerLen(msgpackContainerBin, len(bs))
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} else {
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e.writeContainerLen(msgpackContainerStr, len(bs))
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}
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if len(bs) > 0 {
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e.w.writeb(bs)
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}
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}
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func (e *msgpackEncDriver) writeContainerLen(ct msgpackContainerType, l int) {
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if ct.hasFixMin && l < ct.fixCutoff {
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e.w.writen1(ct.bFixMin | byte(l))
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} else if ct.has8 && l < 256 && (ct.has8Always || e.h.WriteExt) {
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e.w.writen2(ct.b8, uint8(l))
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} else if l < 65536 {
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e.w.writen1(ct.b16)
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bigenHelper{e.x[:2], e.w}.writeUint16(uint16(l))
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} else {
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e.w.writen1(ct.b32)
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bigenHelper{e.x[:4], e.w}.writeUint32(uint32(l))
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}
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}
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//---------------------------------------------
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type msgpackDecDriver struct {
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d *Decoder
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r decReader // *Decoder decReader decReaderT
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h *MsgpackHandle
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b [scratchByteArrayLen]byte
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bd byte
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bdRead bool
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br bool // bytes reader
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noBuiltInTypes
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noStreamingCodec
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decNoSeparator
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}
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// Note: This returns either a primitive (int, bool, etc) for non-containers,
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// or a containerType, or a specific type denoting nil or extension.
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// It is called when a nil interface{} is passed, leaving it up to the DecDriver
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// to introspect the stream and decide how best to decode.
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// It deciphers the value by looking at the stream first.
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func (d *msgpackDecDriver) DecodeNaked() {
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if !d.bdRead {
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d.readNextBd()
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}
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bd := d.bd
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n := &d.d.n
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var decodeFurther bool
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switch bd {
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case mpNil:
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n.v = valueTypeNil
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d.bdRead = false
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case mpFalse:
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n.v = valueTypeBool
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n.b = false
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case mpTrue:
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n.v = valueTypeBool
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n.b = true
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case mpFloat:
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n.v = valueTypeFloat
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n.f = float64(math.Float32frombits(bigen.Uint32(d.r.readx(4))))
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case mpDouble:
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n.v = valueTypeFloat
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n.f = math.Float64frombits(bigen.Uint64(d.r.readx(8)))
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case mpUint8:
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n.v = valueTypeUint
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n.u = uint64(d.r.readn1())
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case mpUint16:
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n.v = valueTypeUint
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n.u = uint64(bigen.Uint16(d.r.readx(2)))
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case mpUint32:
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n.v = valueTypeUint
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n.u = uint64(bigen.Uint32(d.r.readx(4)))
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case mpUint64:
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n.v = valueTypeUint
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n.u = uint64(bigen.Uint64(d.r.readx(8)))
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case mpInt8:
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n.v = valueTypeInt
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n.i = int64(int8(d.r.readn1()))
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case mpInt16:
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n.v = valueTypeInt
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n.i = int64(int16(bigen.Uint16(d.r.readx(2))))
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case mpInt32:
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n.v = valueTypeInt
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n.i = int64(int32(bigen.Uint32(d.r.readx(4))))
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case mpInt64:
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n.v = valueTypeInt
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n.i = int64(int64(bigen.Uint64(d.r.readx(8))))
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default:
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switch {
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case bd >= mpPosFixNumMin && bd <= mpPosFixNumMax:
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// positive fixnum (always signed)
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n.v = valueTypeInt
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n.i = int64(int8(bd))
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case bd >= mpNegFixNumMin && bd <= mpNegFixNumMax:
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// negative fixnum
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n.v = valueTypeInt
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n.i = int64(int8(bd))
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case bd == mpStr8, bd == mpStr16, bd == mpStr32, bd >= mpFixStrMin && bd <= mpFixStrMax:
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if d.h.RawToString {
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n.v = valueTypeString
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n.s = d.DecodeString()
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} else {
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n.v = valueTypeBytes
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n.l = d.DecodeBytes(nil, false, false)
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}
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case bd == mpBin8, bd == mpBin16, bd == mpBin32:
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n.v = valueTypeBytes
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n.l = d.DecodeBytes(nil, false, false)
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case bd == mpArray16, bd == mpArray32, bd >= mpFixArrayMin && bd <= mpFixArrayMax:
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n.v = valueTypeArray
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decodeFurther = true
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case bd == mpMap16, bd == mpMap32, bd >= mpFixMapMin && bd <= mpFixMapMax:
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n.v = valueTypeMap
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decodeFurther = true
|
||
|
|
case bd >= mpFixExt1 && bd <= mpFixExt16, bd >= mpExt8 && bd <= mpExt32:
|
||
|
|
n.v = valueTypeExt
|
||
|
|
clen := d.readExtLen()
|
||
|
|
n.u = uint64(d.r.readn1())
|
||
|
|
n.l = d.r.readx(clen)
|
||
|
|
default:
|
||
|
|
d.d.errorf("Nil-Deciphered DecodeValue: %s: hex: %x, dec: %d", msgBadDesc, bd, bd)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if !decodeFurther {
|
||
|
|
d.bdRead = false
|
||
|
|
}
|
||
|
|
if n.v == valueTypeUint && d.h.SignedInteger {
|
||
|
|
n.v = valueTypeInt
|
||
|
|
n.i = int64(n.u)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// int can be decoded from msgpack type: intXXX or uintXXX
|
||
|
|
func (d *msgpackDecDriver) DecodeInt(bitsize uint8) (i int64) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
switch d.bd {
|
||
|
|
case mpUint8:
|
||
|
|
i = int64(uint64(d.r.readn1()))
|
||
|
|
case mpUint16:
|
||
|
|
i = int64(uint64(bigen.Uint16(d.r.readx(2))))
|
||
|
|
case mpUint32:
|
||
|
|
i = int64(uint64(bigen.Uint32(d.r.readx(4))))
|
||
|
|
case mpUint64:
|
||
|
|
i = int64(bigen.Uint64(d.r.readx(8)))
|
||
|
|
case mpInt8:
|
||
|
|
i = int64(int8(d.r.readn1()))
|
||
|
|
case mpInt16:
|
||
|
|
i = int64(int16(bigen.Uint16(d.r.readx(2))))
|
||
|
|
case mpInt32:
|
||
|
|
i = int64(int32(bigen.Uint32(d.r.readx(4))))
|
||
|
|
case mpInt64:
|
||
|
|
i = int64(bigen.Uint64(d.r.readx(8)))
|
||
|
|
default:
|
||
|
|
switch {
|
||
|
|
case d.bd >= mpPosFixNumMin && d.bd <= mpPosFixNumMax:
|
||
|
|
i = int64(int8(d.bd))
|
||
|
|
case d.bd >= mpNegFixNumMin && d.bd <= mpNegFixNumMax:
|
||
|
|
i = int64(int8(d.bd))
|
||
|
|
default:
|
||
|
|
d.d.errorf("Unhandled single-byte unsigned integer value: %s: %x", msgBadDesc, d.bd)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// check overflow (logic adapted from std pkg reflect/value.go OverflowUint()
|
||
|
|
if bitsize > 0 {
|
||
|
|
if trunc := (i << (64 - bitsize)) >> (64 - bitsize); i != trunc {
|
||
|
|
d.d.errorf("Overflow int value: %v", i)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// uint can be decoded from msgpack type: intXXX or uintXXX
|
||
|
|
func (d *msgpackDecDriver) DecodeUint(bitsize uint8) (ui uint64) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
switch d.bd {
|
||
|
|
case mpUint8:
|
||
|
|
ui = uint64(d.r.readn1())
|
||
|
|
case mpUint16:
|
||
|
|
ui = uint64(bigen.Uint16(d.r.readx(2)))
|
||
|
|
case mpUint32:
|
||
|
|
ui = uint64(bigen.Uint32(d.r.readx(4)))
|
||
|
|
case mpUint64:
|
||
|
|
ui = bigen.Uint64(d.r.readx(8))
|
||
|
|
case mpInt8:
|
||
|
|
if i := int64(int8(d.r.readn1())); i >= 0 {
|
||
|
|
ui = uint64(i)
|
||
|
|
} else {
|
||
|
|
d.d.errorf("Assigning negative signed value: %v, to unsigned type", i)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case mpInt16:
|
||
|
|
if i := int64(int16(bigen.Uint16(d.r.readx(2)))); i >= 0 {
|
||
|
|
ui = uint64(i)
|
||
|
|
} else {
|
||
|
|
d.d.errorf("Assigning negative signed value: %v, to unsigned type", i)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case mpInt32:
|
||
|
|
if i := int64(int32(bigen.Uint32(d.r.readx(4)))); i >= 0 {
|
||
|
|
ui = uint64(i)
|
||
|
|
} else {
|
||
|
|
d.d.errorf("Assigning negative signed value: %v, to unsigned type", i)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case mpInt64:
|
||
|
|
if i := int64(bigen.Uint64(d.r.readx(8))); i >= 0 {
|
||
|
|
ui = uint64(i)
|
||
|
|
} else {
|
||
|
|
d.d.errorf("Assigning negative signed value: %v, to unsigned type", i)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
switch {
|
||
|
|
case d.bd >= mpPosFixNumMin && d.bd <= mpPosFixNumMax:
|
||
|
|
ui = uint64(d.bd)
|
||
|
|
case d.bd >= mpNegFixNumMin && d.bd <= mpNegFixNumMax:
|
||
|
|
d.d.errorf("Assigning negative signed value: %v, to unsigned type", int(d.bd))
|
||
|
|
return
|
||
|
|
default:
|
||
|
|
d.d.errorf("Unhandled single-byte unsigned integer value: %s: %x", msgBadDesc, d.bd)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// check overflow (logic adapted from std pkg reflect/value.go OverflowUint()
|
||
|
|
if bitsize > 0 {
|
||
|
|
if trunc := (ui << (64 - bitsize)) >> (64 - bitsize); ui != trunc {
|
||
|
|
d.d.errorf("Overflow uint value: %v", ui)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// float can either be decoded from msgpack type: float, double or intX
|
||
|
|
func (d *msgpackDecDriver) DecodeFloat(chkOverflow32 bool) (f float64) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
if d.bd == mpFloat {
|
||
|
|
f = float64(math.Float32frombits(bigen.Uint32(d.r.readx(4))))
|
||
|
|
} else if d.bd == mpDouble {
|
||
|
|
f = math.Float64frombits(bigen.Uint64(d.r.readx(8)))
|
||
|
|
} else {
|
||
|
|
f = float64(d.DecodeInt(0))
|
||
|
|
}
|
||
|
|
if chkOverflow32 && chkOvf.Float32(f) {
|
||
|
|
d.d.errorf("msgpack: float32 overflow: %v", f)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// bool can be decoded from bool, fixnum 0 or 1.
|
||
|
|
func (d *msgpackDecDriver) DecodeBool() (b bool) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
if d.bd == mpFalse || d.bd == 0 {
|
||
|
|
// b = false
|
||
|
|
} else if d.bd == mpTrue || d.bd == 1 {
|
||
|
|
b = true
|
||
|
|
} else {
|
||
|
|
d.d.errorf("Invalid single-byte value for bool: %s: %x", msgBadDesc, d.bd)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) DecodeBytes(bs []byte, isstring, zerocopy bool) (bsOut []byte) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
var clen int
|
||
|
|
// ignore isstring. Expect that the bytes may be found from msgpackContainerStr or msgpackContainerBin
|
||
|
|
if bd := d.bd; bd == mpBin8 || bd == mpBin16 || bd == mpBin32 {
|
||
|
|
clen = d.readContainerLen(msgpackContainerBin)
|
||
|
|
} else {
|
||
|
|
clen = d.readContainerLen(msgpackContainerStr)
|
||
|
|
}
|
||
|
|
// println("DecodeBytes: clen: ", clen)
|
||
|
|
d.bdRead = false
|
||
|
|
// bytes may be nil, so handle it. if nil, clen=-1.
|
||
|
|
if clen < 0 {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
if zerocopy {
|
||
|
|
if d.br {
|
||
|
|
return d.r.readx(clen)
|
||
|
|
} else if len(bs) == 0 {
|
||
|
|
bs = d.b[:]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return decByteSlice(d.r, clen, bs)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) DecodeString() (s string) {
|
||
|
|
return string(d.DecodeBytes(d.b[:], true, true))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) readNextBd() {
|
||
|
|
d.bd = d.r.readn1()
|
||
|
|
d.bdRead = true
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) ContainerType() (vt valueType) {
|
||
|
|
bd := d.bd
|
||
|
|
if bd == mpNil {
|
||
|
|
return valueTypeNil
|
||
|
|
} else if bd == mpBin8 || bd == mpBin16 || bd == mpBin32 ||
|
||
|
|
(!d.h.RawToString &&
|
||
|
|
(bd == mpStr8 || bd == mpStr16 || bd == mpStr32 || (bd >= mpFixStrMin && bd <= mpFixStrMax))) {
|
||
|
|
return valueTypeBytes
|
||
|
|
} else if d.h.RawToString &&
|
||
|
|
(bd == mpStr8 || bd == mpStr16 || bd == mpStr32 || (bd >= mpFixStrMin && bd <= mpFixStrMax)) {
|
||
|
|
return valueTypeString
|
||
|
|
} else if bd == mpArray16 || bd == mpArray32 || (bd >= mpFixArrayMin && bd <= mpFixArrayMax) {
|
||
|
|
return valueTypeArray
|
||
|
|
} else if bd == mpMap16 || bd == mpMap32 || (bd >= mpFixMapMin && bd <= mpFixMapMax) {
|
||
|
|
return valueTypeMap
|
||
|
|
} else {
|
||
|
|
// d.d.errorf("isContainerType: unsupported parameter: %v", vt)
|
||
|
|
}
|
||
|
|
return valueTypeUnset
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) TryDecodeAsNil() (v bool) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
if d.bd == mpNil {
|
||
|
|
d.bdRead = false
|
||
|
|
v = true
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) readContainerLen(ct msgpackContainerType) (clen int) {
|
||
|
|
bd := d.bd
|
||
|
|
if bd == mpNil {
|
||
|
|
clen = -1 // to represent nil
|
||
|
|
} else if bd == ct.b8 {
|
||
|
|
clen = int(d.r.readn1())
|
||
|
|
} else if bd == ct.b16 {
|
||
|
|
clen = int(bigen.Uint16(d.r.readx(2)))
|
||
|
|
} else if bd == ct.b32 {
|
||
|
|
clen = int(bigen.Uint32(d.r.readx(4)))
|
||
|
|
} else if (ct.bFixMin & bd) == ct.bFixMin {
|
||
|
|
clen = int(ct.bFixMin ^ bd)
|
||
|
|
} else {
|
||
|
|
d.d.errorf("readContainerLen: %s: hex: %x, decimal: %d", msgBadDesc, bd, bd)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) ReadMapStart() int {
|
||
|
|
return d.readContainerLen(msgpackContainerMap)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) ReadArrayStart() int {
|
||
|
|
return d.readContainerLen(msgpackContainerList)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) readExtLen() (clen int) {
|
||
|
|
switch d.bd {
|
||
|
|
case mpNil:
|
||
|
|
clen = -1 // to represent nil
|
||
|
|
case mpFixExt1:
|
||
|
|
clen = 1
|
||
|
|
case mpFixExt2:
|
||
|
|
clen = 2
|
||
|
|
case mpFixExt4:
|
||
|
|
clen = 4
|
||
|
|
case mpFixExt8:
|
||
|
|
clen = 8
|
||
|
|
case mpFixExt16:
|
||
|
|
clen = 16
|
||
|
|
case mpExt8:
|
||
|
|
clen = int(d.r.readn1())
|
||
|
|
case mpExt16:
|
||
|
|
clen = int(bigen.Uint16(d.r.readx(2)))
|
||
|
|
case mpExt32:
|
||
|
|
clen = int(bigen.Uint32(d.r.readx(4)))
|
||
|
|
default:
|
||
|
|
d.d.errorf("decoding ext bytes: found unexpected byte: %x", d.bd)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) DecodeExt(rv interface{}, xtag uint64, ext Ext) (realxtag uint64) {
|
||
|
|
if xtag > 0xff {
|
||
|
|
d.d.errorf("decodeExt: tag must be <= 0xff; got: %v", xtag)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
realxtag1, xbs := d.decodeExtV(ext != nil, uint8(xtag))
|
||
|
|
realxtag = uint64(realxtag1)
|
||
|
|
if ext == nil {
|
||
|
|
re := rv.(*RawExt)
|
||
|
|
re.Tag = realxtag
|
||
|
|
re.Data = detachZeroCopyBytes(d.br, re.Data, xbs)
|
||
|
|
} else {
|
||
|
|
ext.ReadExt(rv, xbs)
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) decodeExtV(verifyTag bool, tag byte) (xtag byte, xbs []byte) {
|
||
|
|
if !d.bdRead {
|
||
|
|
d.readNextBd()
|
||
|
|
}
|
||
|
|
xbd := d.bd
|
||
|
|
if xbd == mpBin8 || xbd == mpBin16 || xbd == mpBin32 {
|
||
|
|
xbs = d.DecodeBytes(nil, false, true)
|
||
|
|
} else if xbd == mpStr8 || xbd == mpStr16 || xbd == mpStr32 ||
|
||
|
|
(xbd >= mpFixStrMin && xbd <= mpFixStrMax) {
|
||
|
|
xbs = d.DecodeBytes(nil, true, true)
|
||
|
|
} else {
|
||
|
|
clen := d.readExtLen()
|
||
|
|
xtag = d.r.readn1()
|
||
|
|
if verifyTag && xtag != tag {
|
||
|
|
d.d.errorf("Wrong extension tag. Got %b. Expecting: %v", xtag, tag)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
xbs = d.r.readx(clen)
|
||
|
|
}
|
||
|
|
d.bdRead = false
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------
|
||
|
|
|
||
|
|
//MsgpackHandle is a Handle for the Msgpack Schema-Free Encoding Format.
|
||
|
|
type MsgpackHandle struct {
|
||
|
|
BasicHandle
|
||
|
|
|
||
|
|
// RawToString controls how raw bytes are decoded into a nil interface{}.
|
||
|
|
RawToString bool
|
||
|
|
|
||
|
|
// WriteExt flag supports encoding configured extensions with extension tags.
|
||
|
|
// It also controls whether other elements of the new spec are encoded (ie Str8).
|
||
|
|
//
|
||
|
|
// With WriteExt=false, configured extensions are serialized as raw bytes
|
||
|
|
// and Str8 is not encoded.
|
||
|
|
//
|
||
|
|
// A stream can still be decoded into a typed value, provided an appropriate value
|
||
|
|
// is provided, but the type cannot be inferred from the stream. If no appropriate
|
||
|
|
// type is provided (e.g. decoding into a nil interface{}), you get back
|
||
|
|
// a []byte or string based on the setting of RawToString.
|
||
|
|
WriteExt bool
|
||
|
|
binaryEncodingType
|
||
|
|
}
|
||
|
|
|
||
|
|
func (h *MsgpackHandle) SetBytesExt(rt reflect.Type, tag uint64, ext BytesExt) (err error) {
|
||
|
|
return h.SetExt(rt, tag, &setExtWrapper{b: ext})
|
||
|
|
}
|
||
|
|
|
||
|
|
func (h *MsgpackHandle) newEncDriver(e *Encoder) encDriver {
|
||
|
|
return &msgpackEncDriver{e: e, w: e.w, h: h}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (h *MsgpackHandle) newDecDriver(d *Decoder) decDriver {
|
||
|
|
return &msgpackDecDriver{d: d, r: d.r, h: h, br: d.bytes}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *msgpackEncDriver) reset() {
|
||
|
|
e.w = e.e.w
|
||
|
|
}
|
||
|
|
|
||
|
|
func (d *msgpackDecDriver) reset() {
|
||
|
|
d.r = d.d.r
|
||
|
|
d.bd, d.bdRead = 0, false
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------
|
||
|
|
|
||
|
|
type msgpackSpecRpcCodec struct {
|
||
|
|
rpcCodec
|
||
|
|
}
|
||
|
|
|
||
|
|
// /////////////// Spec RPC Codec ///////////////////
|
||
|
|
func (c *msgpackSpecRpcCodec) WriteRequest(r *rpc.Request, body interface{}) error {
|
||
|
|
// WriteRequest can write to both a Go service, and other services that do
|
||
|
|
// not abide by the 1 argument rule of a Go service.
|
||
|
|
// We discriminate based on if the body is a MsgpackSpecRpcMultiArgs
|
||
|
|
var bodyArr []interface{}
|
||
|
|
if m, ok := body.(MsgpackSpecRpcMultiArgs); ok {
|
||
|
|
bodyArr = ([]interface{})(m)
|
||
|
|
} else {
|
||
|
|
bodyArr = []interface{}{body}
|
||
|
|
}
|
||
|
|
r2 := []interface{}{0, uint32(r.Seq), r.ServiceMethod, bodyArr}
|
||
|
|
return c.write(r2, nil, false, true)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *msgpackSpecRpcCodec) WriteResponse(r *rpc.Response, body interface{}) error {
|
||
|
|
var moe interface{}
|
||
|
|
if r.Error != "" {
|
||
|
|
moe = r.Error
|
||
|
|
}
|
||
|
|
if moe != nil && body != nil {
|
||
|
|
body = nil
|
||
|
|
}
|
||
|
|
r2 := []interface{}{1, uint32(r.Seq), moe, body}
|
||
|
|
return c.write(r2, nil, false, true)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *msgpackSpecRpcCodec) ReadResponseHeader(r *rpc.Response) error {
|
||
|
|
return c.parseCustomHeader(1, &r.Seq, &r.Error)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *msgpackSpecRpcCodec) ReadRequestHeader(r *rpc.Request) error {
|
||
|
|
return c.parseCustomHeader(0, &r.Seq, &r.ServiceMethod)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *msgpackSpecRpcCodec) ReadRequestBody(body interface{}) error {
|
||
|
|
if body == nil { // read and discard
|
||
|
|
return c.read(nil)
|
||
|
|
}
|
||
|
|
bodyArr := []interface{}{body}
|
||
|
|
return c.read(&bodyArr)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *msgpackSpecRpcCodec) parseCustomHeader(expectTypeByte byte, msgid *uint64, methodOrError *string) (err error) {
|
||
|
|
|
||
|
|
if c.isClosed() {
|
||
|
|
return io.EOF
|
||
|
|
}
|
||
|
|
|
||
|
|
// We read the response header by hand
|
||
|
|
// so that the body can be decoded on its own from the stream at a later time.
|
||
|
|
|
||
|
|
const fia byte = 0x94 //four item array descriptor value
|
||
|
|
// Not sure why the panic of EOF is swallowed above.
|
||
|
|
// if bs1 := c.dec.r.readn1(); bs1 != fia {
|
||
|
|
// err = fmt.Errorf("Unexpected value for array descriptor: Expecting %v. Received %v", fia, bs1)
|
||
|
|
// return
|
||
|
|
// }
|
||
|
|
var b byte
|
||
|
|
b, err = c.br.ReadByte()
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if b != fia {
|
||
|
|
err = fmt.Errorf("Unexpected value for array descriptor: Expecting %v. Received %v", fia, b)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if err = c.read(&b); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if b != expectTypeByte {
|
||
|
|
err = fmt.Errorf("Unexpected byte descriptor in header. Expecting %v. Received %v", expectTypeByte, b)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = c.read(msgid); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = c.read(methodOrError); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------
|
||
|
|
|
||
|
|
// msgpackSpecRpc is the implementation of Rpc that uses custom communication protocol
|
||
|
|
// as defined in the msgpack spec at https://github.com/msgpack-rpc/msgpack-rpc/blob/master/spec.md
|
||
|
|
type msgpackSpecRpc struct{}
|
||
|
|
|
||
|
|
// MsgpackSpecRpc implements Rpc using the communication protocol defined in
|
||
|
|
// the msgpack spec at https://github.com/msgpack-rpc/msgpack-rpc/blob/master/spec.md .
|
||
|
|
// Its methods (ServerCodec and ClientCodec) return values that implement RpcCodecBuffered.
|
||
|
|
var MsgpackSpecRpc msgpackSpecRpc
|
||
|
|
|
||
|
|
func (x msgpackSpecRpc) ServerCodec(conn io.ReadWriteCloser, h Handle) rpc.ServerCodec {
|
||
|
|
return &msgpackSpecRpcCodec{newRPCCodec(conn, h)}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (x msgpackSpecRpc) ClientCodec(conn io.ReadWriteCloser, h Handle) rpc.ClientCodec {
|
||
|
|
return &msgpackSpecRpcCodec{newRPCCodec(conn, h)}
|
||
|
|
}
|
||
|
|
|
||
|
|
var _ decDriver = (*msgpackDecDriver)(nil)
|
||
|
|
var _ encDriver = (*msgpackEncDriver)(nil)
|