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// Copyright (c) 2012-2018 Ugorji Nwoke. All rights reserved.
// Use of this source code is governed by a MIT license found in the LICENSE file.
/*
MSGPACK
Msgpack-c implementation powers the c, c++, python, ruby, etc libraries.
We need to maintain compatibility with it and how it encodes integer values
without caring about the type.
For compatibility with behaviour of msgpack-c reference implementation:
- Go intX (>0) and uintX
IS ENCODED AS
msgpack +ve fixnum, unsigned
- Go intX (<0)
IS ENCODED AS
msgpack -ve fixnum, signed
*/
package codec
import (
"fmt"
"io"
"math"
"net/rpc"
"reflect"
"time"
)
const (
mpPosFixNumMin byte = 0x00
mpPosFixNumMax = 0x7f
mpFixMapMin = 0x80
mpFixMapMax = 0x8f
mpFixArrayMin = 0x90
mpFixArrayMax = 0x9f
mpFixStrMin = 0xa0
mpFixStrMax = 0xbf
mpNil = 0xc0
_ = 0xc1
mpFalse = 0xc2
mpTrue = 0xc3
mpFloat = 0xca
mpDouble = 0xcb
mpUint8 = 0xcc
mpUint16 = 0xcd
mpUint32 = 0xce
mpUint64 = 0xcf
mpInt8 = 0xd0
mpInt16 = 0xd1
mpInt32 = 0xd2
mpInt64 = 0xd3
// extensions below
mpBin8 = 0xc4
mpBin16 = 0xc5
mpBin32 = 0xc6
mpExt8 = 0xc7
mpExt16 = 0xc8
mpExt32 = 0xc9
mpFixExt1 = 0xd4
mpFixExt2 = 0xd5
mpFixExt4 = 0xd6
mpFixExt8 = 0xd7
mpFixExt16 = 0xd8
mpStr8 = 0xd9 // new
mpStr16 = 0xda
mpStr32 = 0xdb
mpArray16 = 0xdc
mpArray32 = 0xdd
mpMap16 = 0xde
mpMap32 = 0xdf
mpNegFixNumMin = 0xe0
mpNegFixNumMax = 0xff
)
var mpTimeExtTag int8 = -1
var mpTimeExtTagU = uint8(mpTimeExtTag)
// var mpdesc = map[byte]string{
// mpPosFixNumMin: "PosFixNumMin",
// mpPosFixNumMax: "PosFixNumMax",
// mpFixMapMin: "FixMapMin",
// mpFixMapMax: "FixMapMax",
// mpFixArrayMin: "FixArrayMin",
// mpFixArrayMax: "FixArrayMax",
// mpFixStrMin: "FixStrMin",
// mpFixStrMax: "FixStrMax",
// mpNil: "Nil",
// mpFalse: "False",
// mpTrue: "True",
// mpFloat: "Float",
// mpDouble: "Double",
// mpUint8: "Uint8",
// mpUint16: "Uint16",
// mpUint32: "Uint32",
// mpUint64: "Uint64",
// mpInt8: "Int8",
// mpInt16: "Int16",
// mpInt32: "Int32",
// mpInt64: "Int64",
// mpBin8: "Bin8",
// mpBin16: "Bin16",
// mpBin32: "Bin32",
// mpExt8: "Ext8",
// mpExt16: "Ext16",
// mpExt32: "Ext32",
// mpFixExt1: "FixExt1",
// mpFixExt2: "FixExt2",
// mpFixExt4: "FixExt4",
// mpFixExt8: "FixExt8",
// mpFixExt16: "FixExt16",
// mpStr8: "Str8",
// mpStr16: "Str16",
// mpStr32: "Str32",
// mpArray16: "Array16",
// mpArray32: "Array32",
// mpMap16: "Map16",
// mpMap32: "Map32",
// mpNegFixNumMin: "NegFixNumMin",
// mpNegFixNumMax: "NegFixNumMax",
// }
func mpdesc(bd byte) string {
switch bd {
case mpNil:
return "nil"
case mpFalse:
return "false"
case mpTrue:
return "true"
case mpFloat, mpDouble:
return "float"
case mpUint8, mpUint16, mpUint32, mpUint64:
return "uint"
case mpInt8, mpInt16, mpInt32, mpInt64:
return "int"
default:
switch {
case bd >= mpPosFixNumMin && bd <= mpPosFixNumMax:
return "int"
case bd >= mpNegFixNumMin && bd <= mpNegFixNumMax:
return "int"
case bd == mpStr8, bd == mpStr16, bd == mpStr32, bd >= mpFixStrMin && bd <= mpFixStrMax:
return "string|bytes"
case bd == mpBin8, bd == mpBin16, bd == mpBin32:
return "bytes"
case bd == mpArray16, bd == mpArray32, bd >= mpFixArrayMin && bd <= mpFixArrayMax:
return "array"
case bd == mpMap16, bd == mpMap32, bd >= mpFixMapMin && bd <= mpFixMapMax:
return "map"
case bd >= mpFixExt1 && bd <= mpFixExt16, bd >= mpExt8 && bd <= mpExt32:
return "ext"
default:
return "unknown"
}
}
}
// MsgpackSpecRpcMultiArgs is a special type which signifies to the MsgpackSpecRpcCodec
// that the backend RPC service takes multiple arguments, which have been arranged
// in sequence in the slice.
//
// The Codec then passes it AS-IS to the rpc service (without wrapping it in an
// array of 1 element).
type MsgpackSpecRpcMultiArgs []interface{}
// A MsgpackContainer type specifies the different types of msgpackContainers.
type msgpackContainerType struct {
fixCutoff int
bFixMin, b8, b16, b32 byte
hasFixMin, has8, has8Always bool
}
var (
msgpackContainerStr = msgpackContainerType{
32, mpFixStrMin, mpStr8, mpStr16, mpStr32, true, true, false,
}
msgpackContainerBin = msgpackContainerType{
0, 0, mpBin8, mpBin16, mpBin32, false, true, true,
}
msgpackContainerList = msgpackContainerType{
16, mpFixArrayMin, 0, mpArray16, mpArray32, true, false, false,
}
msgpackContainerMap = msgpackContainerType{
16, mpFixMapMin, 0, mpMap16, mpMap32, true, false, false,
}
)
//---------------------------------------------
type msgpackEncDriver struct {
noBuiltInTypes
encDriverNoopContainerWriter
// encNoSeparator
e *Encoder
w encWriter
h *MsgpackHandle
x [8]byte
_ [3]uint64 // padding
}
func (e *msgpackEncDriver) EncodeNil() {
e.w.writen1(mpNil)
}
func (e *msgpackEncDriver) EncodeInt(i int64) {
// if i >= 0 {
// e.EncodeUint(uint64(i))
// } else if false &&
if i > math.MaxInt8 {
if i <= math.MaxInt16 {
e.w.writen1(mpInt16)
bigenHelper{e.x[:2], e.w}.writeUint16(uint16(i))
} else if i <= math.MaxInt32 {
e.w.writen1(mpInt32)
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(i))
} else {
e.w.writen1(mpInt64)
bigenHelper{e.x[:8], e.w}.writeUint64(uint64(i))
}
} else if i >= -32 {
if e.h.NoFixedNum {
e.w.writen2(mpInt8, byte(i))
} else {
e.w.writen1(byte(i))
}
} else if i >= math.MinInt8 {
e.w.writen2(mpInt8, byte(i))
} else if i >= math.MinInt16 {
e.w.writen1(mpInt16)
bigenHelper{e.x[:2], e.w}.writeUint16(uint16(i))
} else if i >= math.MinInt32 {
e.w.writen1(mpInt32)
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(i))
} else {
e.w.writen1(mpInt64)
bigenHelper{e.x[:8], e.w}.writeUint64(uint64(i))
}
}
func (e *msgpackEncDriver) EncodeUint(i uint64) {
if i <= math.MaxInt8 {
if e.h.NoFixedNum {
e.w.writen2(mpUint8, byte(i))
} else {
e.w.writen1(byte(i))
}
} else if i <= math.MaxUint8 {
e.w.writen2(mpUint8, byte(i))
} else if i <= math.MaxUint16 {
e.w.writen1(mpUint16)
bigenHelper{e.x[:2], e.w}.writeUint16(uint16(i))
} else if i <= math.MaxUint32 {
e.w.writen1(mpUint32)
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(i))
} else {
e.w.writen1(mpUint64)
bigenHelper{e.x[:8], e.w}.writeUint64(uint64(i))
}
}
func (e *msgpackEncDriver) EncodeBool(b bool) {
if b {
e.w.writen1(mpTrue)
} else {
e.w.writen1(mpFalse)
}
}
func (e *msgpackEncDriver) EncodeFloat32(f float32) {
e.w.writen1(mpFloat)
bigenHelper{e.x[:4], e.w}.writeUint32(math.Float32bits(f))
}
func (e *msgpackEncDriver) EncodeFloat64(f float64) {
e.w.writen1(mpDouble)
bigenHelper{e.x[:8], e.w}.writeUint64(math.Float64bits(f))
}
func (e *msgpackEncDriver) EncodeTime(t time.Time) {
if t.IsZero() {
e.EncodeNil()
return
}
t = t.UTC()
sec, nsec := t.Unix(), uint64(t.Nanosecond())
var data64 uint64
var l = 4
if sec >= 0 && sec>>34 == 0 {
data64 = (nsec << 34) | uint64(sec)
if data64&0xffffffff00000000 != 0 {
l = 8
}
} else {
l = 12
}
if e.h.WriteExt {
e.encodeExtPreamble(mpTimeExtTagU, l)
} else {
e.writeContainerLen(msgpackContainerStr, l)
}
switch l {
case 4:
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(data64))
case 8:
bigenHelper{e.x[:8], e.w}.writeUint64(data64)
case 12:
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(nsec))
bigenHelper{e.x[:8], e.w}.writeUint64(uint64(sec))
}
}
func (e *msgpackEncDriver) EncodeExt(v interface{}, xtag uint64, ext Ext, _ *Encoder) {
bs := ext.WriteExt(v)
if bs == nil {
e.EncodeNil()
return
}
if e.h.WriteExt {
e.encodeExtPreamble(uint8(xtag), len(bs))
e.w.writeb(bs)
} else {
e.EncodeStringBytes(cRAW, bs)
}
}
func (e *msgpackEncDriver) EncodeRawExt(re *RawExt, _ *Encoder) {
e.encodeExtPreamble(uint8(re.Tag), len(re.Data))
e.w.writeb(re.Data)
}
func (e *msgpackEncDriver) encodeExtPreamble(xtag byte, l int) {
if l == 1 {
e.w.writen2(mpFixExt1, xtag)
} else if l == 2 {
e.w.writen2(mpFixExt2, xtag)
} else if l == 4 {
e.w.writen2(mpFixExt4, xtag)
} else if l == 8 {
e.w.writen2(mpFixExt8, xtag)
} else if l == 16 {
e.w.writen2(mpFixExt16, xtag)
} else if l < 256 {
e.w.writen2(mpExt8, byte(l))
e.w.writen1(xtag)
} else if l < 65536 {
e.w.writen1(mpExt16)
bigenHelper{e.x[:2], e.w}.writeUint16(uint16(l))
e.w.writen1(xtag)
} else {
e.w.writen1(mpExt32)
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(l))
e.w.writen1(xtag)
}
}
func (e *msgpackEncDriver) WriteArrayStart(length int) {
e.writeContainerLen(msgpackContainerList, length)
}
func (e *msgpackEncDriver) WriteMapStart(length int) {
e.writeContainerLen(msgpackContainerMap, length)
}
func (e *msgpackEncDriver) EncodeString(c charEncoding, s string) {
slen := len(s)
if c == cRAW && e.h.WriteExt {
e.writeContainerLen(msgpackContainerBin, slen)
} else {
e.writeContainerLen(msgpackContainerStr, slen)
}
if slen > 0 {
e.w.writestr(s)
}
}
func (e *msgpackEncDriver) EncodeStringBytes(c charEncoding, bs []byte) {
if bs == nil {
e.EncodeNil()
return
}
slen := len(bs)
if c == cRAW && e.h.WriteExt {
e.writeContainerLen(msgpackContainerBin, slen)
} else {
e.writeContainerLen(msgpackContainerStr, slen)
}
if slen > 0 {
e.w.writeb(bs)
}
}
func (e *msgpackEncDriver) writeContainerLen(ct msgpackContainerType, l int) {
if ct.hasFixMin && l < ct.fixCutoff {
e.w.writen1(ct.bFixMin | byte(l))
} else if ct.has8 && l < 256 && (ct.has8Always || e.h.WriteExt) {
e.w.writen2(ct.b8, uint8(l))
} else if l < 65536 {
e.w.writen1(ct.b16)
bigenHelper{e.x[:2], e.w}.writeUint16(uint16(l))
} else {
e.w.writen1(ct.b32)
bigenHelper{e.x[:4], e.w}.writeUint32(uint32(l))
}
}
//---------------------------------------------
type msgpackDecDriver struct {
d *Decoder
r decReader // *Decoder decReader decReaderT
h *MsgpackHandle
// b [scratchByteArrayLen]byte
bd byte
bdRead bool
br bool // bytes reader
noBuiltInTypes
// noStreamingCodec
// decNoSeparator
decDriverNoopContainerReader
_ [3]uint64 // padding
}
// Note: This returns either a primitive (int, bool, etc) for non-containers,
// or a containerType, or a specific type denoting nil or extension.
// It is called when a nil interface{} is passed, leaving it up to the DecDriver
// to introspect the stream and decide how best to decode.
// It deciphers the value by looking at the stream first.
func (d *msgpackDecDriver) DecodeNaked() {
if !d.bdRead {
d.readNextBd()
}
bd := d.bd
n := d.d.n
var decodeFurther bool
switch bd {
case mpNil:
n.v = valueTypeNil
d.bdRead = false
case mpFalse:
n.v = valueTypeBool
n.b = false
case mpTrue:
n.v = valueTypeBool
n.b = true
case mpFloat:
n.v = valueTypeFloat
n.f = float64(math.Float32frombits(bigen.Uint32(d.r.readx(4))))
case mpDouble:
n.v = valueTypeFloat
n.f = math.Float64frombits(bigen.Uint64(d.r.readx(8)))
case mpUint8:
n.v = valueTypeUint
n.u = uint64(d.r.readn1())
case mpUint16:
n.v = valueTypeUint
n.u = uint64(bigen.Uint16(d.r.readx(2)))
case mpUint32:
n.v = valueTypeUint
n.u = uint64(bigen.Uint32(d.r.readx(4)))
case mpUint64:
n.v = valueTypeUint
n.u = uint64(bigen.Uint64(d.r.readx(8)))
case mpInt8:
n.v = valueTypeInt
n.i = int64(int8(d.r.readn1()))
case mpInt16:
n.v = valueTypeInt
n.i = int64(int16(bigen.Uint16(d.r.readx(2))))
case mpInt32:
n.v = valueTypeInt
n.i = int64(int32(bigen.Uint32(d.r.readx(4))))
case mpInt64:
n.v = valueTypeInt
n.i = int64(int64(bigen.Uint64(d.r.readx(8))))
default:
switch {
case bd >= mpPosFixNumMin && bd <= mpPosFixNumMax:
// positive fixnum (always signed)
n.v = valueTypeInt
n.i = int64(int8(bd))
case bd >= mpNegFixNumMin && bd <= mpNegFixNumMax:
// negative fixnum
n.v = valueTypeInt
n.i = int64(int8(bd))
case bd == mpStr8, bd == mpStr16, bd == mpStr32, bd >= mpFixStrMin && bd <= mpFixStrMax:
if d.h.RawToString {
n.v = valueTypeString
n.s = d.DecodeString()
} else {
n.v = valueTypeBytes
n.l = d.DecodeBytes(nil, false)
}
case bd == mpBin8, bd == mpBin16, bd == mpBin32:
n.v = valueTypeBytes
n.l = d.DecodeBytes(nil, false)
case bd == mpArray16, bd == mpArray32, bd >= mpFixArrayMin && bd <= mpFixArrayMax:
n.v = valueTypeArray
decodeFurther = true
case bd == mpMap16, bd == mpMap32, bd >= mpFixMapMin && bd <= mpFixMapMax:
n.v = valueTypeMap
decodeFurther = true
case bd >= mpFixExt1 && bd <= mpFixExt16, bd >= mpExt8 && bd <= mpExt32:
n.v = valueTypeExt
clen := d.readExtLen()
n.u = uint64(d.r.readn1())
if n.u == uint64(mpTimeExtTagU) {
n.v = valueTypeTime
n.t = d.decodeTime(clen)
} else {
n.l = d.r.readx(clen)
}
default:
d.d.errorf("cannot infer value: %s: Ox%x/%d/%s", msgBadDesc, bd, bd, mpdesc(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) DecodeInt64() (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("cannot decode signed integer: %s: %x/%s", msgBadDesc, d.bd, mpdesc(d.bd))
return
}
}
d.bdRead = false
return
}
// uint can be decoded from msgpack type: intXXX or uintXXX
func (d *msgpackDecDriver) DecodeUint64() (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("cannot decode unsigned integer: %s: %x/%s", msgBadDesc, d.bd, mpdesc(d.bd))
return
}
}
d.bdRead = false
return
}
// float can either be decoded from msgpack type: float, double or intX
func (d *msgpackDecDriver) DecodeFloat64() (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.DecodeInt64())
}
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("cannot decode bool: %s: %x/%s", msgBadDesc, d.bd, mpdesc(d.bd))
return
}
d.bdRead = false
return
}
func (d *msgpackDecDriver) DecodeBytes(bs []byte, zerocopy bool) (bsOut []byte) {
if !d.bdRead {
d.readNextBd()
}
// check if an "array" of uint8's (see ContainerType for how to infer if an array)
bd := d.bd
// DecodeBytes could be from: bin str fixstr fixarray array ...
var clen int
vt := d.ContainerType()
switch vt {
case valueTypeBytes:
// valueTypeBytes may be a mpBin or an mpStr container
if bd == mpBin8 || bd == mpBin16 || bd == mpBin32 {
clen = d.readContainerLen(msgpackContainerBin)
} else {
clen = d.readContainerLen(msgpackContainerStr)
}
case valueTypeString:
clen = d.readContainerLen(msgpackContainerStr)
case valueTypeArray:
if zerocopy && len(bs) == 0 {
bs = d.d.b[:]
}
bsOut, _ = fastpathTV.DecSliceUint8V(bs, true, d.d)
return
default:
d.d.errorf("invalid container type: expecting bin|str|array, got: 0x%x", uint8(vt))
return
}
// these are (bin|str)(8|16|32)
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.d.b[:]
}
}
return decByteSlice(d.r, clen, d.h.MaxInitLen, bs)
}
func (d *msgpackDecDriver) DecodeString() (s string) {
return string(d.DecodeBytes(d.d.b[:], true))
}
func (d *msgpackDecDriver) DecodeStringAsBytes() (s []byte) {
return d.DecodeBytes(d.d.b[:], true)
}
func (d *msgpackDecDriver) readNextBd() {
d.bd = d.r.readn1()
d.bdRead = true
}
func (d *msgpackDecDriver) uncacheRead() {
if d.bdRead {
d.r.unreadn1()
d.bdRead = false
}
}
func (d *msgpackDecDriver) ContainerType() (vt valueType) {
if !d.bdRead {
d.readNextBd()
}
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
return 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("cannot read container length: %s: hex: %x, decimal: %d", msgBadDesc, bd, bd)
return
}
d.bdRead = false
return
}
func (d *msgpackDecDriver) ReadMapStart() int {
if !d.bdRead {
d.readNextBd()
}
return d.readContainerLen(msgpackContainerMap)
}
func (d *msgpackDecDriver) ReadArrayStart() int {
if !d.bdRead {
d.readNextBd()
}
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) DecodeTime() (t time.Time) {
// decode time from string bytes or ext
if !d.bdRead {
d.readNextBd()
}
if d.bd == mpNil {
d.bdRead = false
return
}
var clen int
switch d.ContainerType() {
case valueTypeBytes, valueTypeString:
clen = d.readContainerLen(msgpackContainerStr)
default:
// expect to see mpFixExt4,-1 OR mpFixExt8,-1 OR mpExt8,12,-1
d.bdRead = false
b2 := d.r.readn1()
if d.bd == mpFixExt4 && b2 == mpTimeExtTagU {
clen = 4
} else if d.bd == mpFixExt8 && b2 == mpTimeExtTagU {
clen = 8
} else if d.bd == mpExt8 && b2 == 12 && d.r.readn1() == mpTimeExtTagU {
clen = 12
} else {
d.d.errorf("invalid bytes for decoding time as extension: got 0x%x, 0x%x", d.bd, b2)
return
}
}
return d.decodeTime(clen)
}
func (d *msgpackDecDriver) decodeTime(clen int) (t time.Time) {
// bs = d.r.readx(clen)
d.bdRead = false
switch clen {
case 4:
t = time.Unix(int64(bigen.Uint32(d.r.readx(4))), 0).UTC()
case 8:
tv := bigen.Uint64(d.r.readx(8))
t = time.Unix(int64(tv&0x00000003ffffffff), int64(tv>>34)).UTC()
case 12:
nsec := bigen.Uint32(d.r.readx(4))
sec := bigen.Uint64(d.r.readx(8))
t = time.Unix(int64(sec), int64(nsec)).UTC()
default:
d.d.errorf("invalid length of bytes for decoding time - expecting 4 or 8 or 12, got %d", clen)
return
}
return
}
func (d *msgpackDecDriver) DecodeExt(rv interface{}, xtag uint64, ext Ext) (realxtag uint64) {
if xtag > 0xff {
d.d.errorf("ext: 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, true)
} else if xbd == mpStr8 || xbd == mpStr16 || xbd == mpStr32 ||
(xbd >= mpFixStrMin && xbd <= mpFixStrMax) {
xbs = d.DecodeStringAsBytes()
} 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
// NoFixedNum says to output all signed integers as 2-bytes, never as 1-byte fixednum.
NoFixedNum 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
noElemSeparators
// _ [1]uint64 // padding
}
// Name returns the name of the handle: msgpack
func (h *MsgpackHandle) Name() string { return "msgpack" }
// SetBytesExt sets an extension
func (h *MsgpackHandle) SetBytesExt(rt reflect.Type, tag uint64, ext BytesExt) (err error) {
return h.SetExt(rt, tag, &extWrapper{ext, interfaceExtFailer{}})
}
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, h: h, r: d.r, br: d.bytes}
}
func (e *msgpackEncDriver) reset() {
e.w = e.e.w
}
func (d *msgpackDecDriver) reset() {
d.r, d.br = d.d.r, d.d.bytes
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)
}
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)
}
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 ba [1]byte
var n int
for {
n, err = c.r.Read(ba[:])
if err != nil {
return
}
if n == 1 {
break
}
}
var b = ba[0]
if b != fia {
err = fmt.Errorf("not array - %s %x/%s", msgBadDesc, b, mpdesc(b))
} else {
err = c.read(&b)
if err == nil {
if b != expectTypeByte {
err = fmt.Errorf("%s - expecting %v but got %x/%s",
msgBadDesc, expectTypeByte, b, mpdesc(b))
} else {
err = c.read(msgid)
if err == nil {
err = c.read(methodOrError)
}
}
}
}
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 .
//
// See GoRpc documentation, for information on buffering for better performance.
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)