impl

package
v1.5.7 Latest Latest
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 Go to latest Published: Sep 20, 2021 License: Apache-2.0 Imports: 17 Imported by: 0

Documentation

Overview

* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License.

Index

Constants

View Source 
const (
	TAG_READ        = int32(-1)
	ASCII_GAP       = 32
	CHUNK_SIZE      = 4096
	BC_BINARY       = byte('B') // final chunk
	BC_BINARY_CHUNK = byte('A') // non-final chunk

	BC_BINARY_DIRECT  = byte(0x20) // 1-byte length binary
	BINARY_DIRECT_MAX = byte(0x0f)
	BC_BINARY_SHORT   = byte(0x34) // 2-byte length binary
	BINARY_SHORT_MAX  = 0x3ff      // 0-1023 binary

	BC_DATE        = byte(0x4a) // 64-bit millisecond UTC date
	BC_DATE_MINUTE = byte(0x4b) // 32-bit minute UTC date

	BC_DOUBLE = byte('D') // IEEE 64-bit double

	BC_DOUBLE_ZERO  = byte(0x5b)
	BC_DOUBLE_ONE   = byte(0x5c)
	BC_DOUBLE_BYTE  = byte(0x5d)
	BC_DOUBLE_SHORT = byte(0x5e)
	BC_DOUBLE_MILL  = byte(0x5f)

	BC_FALSE = byte('F') // boolean false

	BC_INT = byte('I') // 32-bit int

	INT_DIRECT_MIN = -0x10
	INT_DIRECT_MAX = byte(0x2f)
	BC_INT_ZERO    = byte(0x90)

	INT_BYTE_MIN     = -0x800
	INT_BYTE_MAX     = 0x7ff
	BC_INT_BYTE_ZERO = byte(0xc8)

	BC_END = byte('Z')

	INT_SHORT_MIN     = -0x40000
	INT_SHORT_MAX     = 0x3ffff
	BC_INT_SHORT_ZERO = byte(0xd4)

	BC_LIST_VARIABLE         = byte(0x55)
	BC_LIST_FIXED            = byte('V')
	BC_LIST_VARIABLE_UNTYPED = byte(0x57)
	BC_LIST_FIXED_UNTYPED    = byte(0x58)

	BC_LIST_DIRECT         = byte(0x70)
	BC_LIST_DIRECT_UNTYPED = byte(0x78)
	LIST_DIRECT_MAX        = byte(0x7)

	BC_LONG         = byte('L') // 64-bit signed integer
	LONG_DIRECT_MIN = -0x08
	LONG_DIRECT_MAX = byte(0x0f)
	BC_LONG_ZERO    = byte(0xe0)

	LONG_BYTE_MIN     = -0x800
	LONG_BYTE_MAX     = 0x7ff
	BC_LONG_BYTE_ZERO = byte(0xf8)

	LONG_SHORT_MIN     = -0x40000
	LONG_SHORT_MAX     = 0x3ffff
	BC_LONG_SHORT_ZERO = byte(0x3c)

	BC_LONG_INT = byte(0x59)

	BC_MAP         = byte('M')
	BC_MAP_UNTYPED = byte('H')

	BC_NULL = byte('N') // x4e

	BC_OBJECT     = byte('O')
	BC_OBJECT_DEF = byte('C')

	BC_OBJECT_DIRECT  = byte(0x60)
	OBJECT_DIRECT_MAX = byte(0x0f)

	BC_REF = byte(0x51)

	BC_STRING       = byte('S') // final string
	BC_STRING_CHUNK = byte('R') // non-final string

	BC_STRING_DIRECT  = byte(0x00)
	STRING_DIRECT_MAX = byte(0x1f)
	BC_STRING_SHORT   = byte(0x30)
	STRING_SHORT_MAX  = 0x3ff

	BC_TRUE = byte('T')

	P_PACKET_CHUNK = byte(0x4f)
	P_PACKET       = byte('P')

	P_PACKET_DIRECT   = byte(0x80)
	PACKET_DIRECT_MAX = byte(0x7f)

	P_PACKET_SHORT   = byte(0x70)
	PACKET_SHORT_MAX = 0xfff
	ARRAY_STRING     = "[string"
	ARRAY_INT        = "[int"
	ARRAY_DOUBLE     = "[double"
	ARRAY_FLOAT      = "[float"
	ARRAY_BOOL       = "[boolean"
	ARRAY_LONG       = "[long"

	PATH_KEY      = "path"
	GROUP_KEY     = "group"
	INTERFACE_KEY = "interface"
	VERSION_KEY   = "version"
	TIMEOUT_KEY   = "timeout"

	STRING_NIL   = ""
	STRING_TRUE  = "true"
	STRING_FALSE = "false"
	STRING_ZERO  = "0.0"
	STRING_ONE   = "1.0"
)

constansts

View Source 
const (
	Response_OK                byte = 20
	Response_CLIENT_TIMEOUT    byte = 30
	Response_SERVER_TIMEOUT    byte = 31
	Response_BAD_REQUEST       byte = 40
	Response_BAD_RESPONSE      byte = 50
	Response_SERVICE_NOT_FOUND byte = 60
	Response_SERVICE_ERROR     byte = 70
	Response_SERVER_ERROR      byte = 80
	Response_CLIENT_ERROR      byte = 90

	// According to "java dubbo" There are two cases of response:
	// 		1. with attachments
	// 		2. no attachments
	RESPONSE_WITH_EXCEPTION                  int32 = 0
	RESPONSE_VALUE                           int32 = 1
	RESPONSE_NULL_VALUE                      int32 = 2
	RESPONSE_WITH_EXCEPTION_WITH_ATTACHMENTS int32 = 3
	RESPONSE_VALUE_WITH_ATTACHMENTS          int32 = 4
	RESPONSE_NULL_VALUE_WITH_ATTACHMENTS     int32 = 5
)

ResponsePayload related consts

View Source 
const (
	// header length.
	HEADER_LENGTH = 16

	// magic header
	MAGIC      = uint16(0xdabb)
	MAGIC_HIGH = byte(0xda)
	MAGIC_LOW  = byte(0xbb)

	// message flag.
	FLAG_REQUEST = byte(0x80)
	FLAG_TWOWAY  = byte(0x40)
	FLAG_EVENT   = byte(0x20) // for heartbeat
	SERIAL_MASK  = 0x1f

	DUBBO_VERSION                          = "2.5.4"
	DUBBO_VERSION_KEY                      = "dubbo"
	DEFAULT_DUBBO_PROTOCOL_VERSION         = "2.0.2" // Dubbo RPC protocol version, for compatibility, it must not be between 2.0.10 ~ 2.6.2
	LOWEST_VERSION_FOR_RESPONSE_ATTACHMENT = 2000200
	DEFAULT_LEN                            = 8388608 // 8 * 1024 * 1024 default body max length
)

*

  • the dubbo protocol header length is 16 Bytes.
  • the first 2 Bytes is magic code '0xdabb'
  • the next 1 Byte is message flags, in which its 16-20 bit is serial id, 21 for event, 22 for two way, 23 for request/response flag
  • the next 1 Bytes is response state.
  • the next 8 Bytes is package DI.
  • the next 4 Bytes is package length. *
View Source 
const (
	JAVA_IDENT_REGEX = "(?:[_$a-zA-Z][_$a-zA-Z0-9]*)"
	CLASS_DESC       = "(?:L" + JAVA_IDENT_REGEX + "(?:\\/" + JAVA_IDENT_REGEX + ")*;)"
	ARRAY_DESC       = "(?:\\[+(?:(?:[VZBCDFIJS])|" + CLASS_DESC + "))"
	DESC_REGEX       = "(?:(?:[VZBCDFIJS])|" + CLASS_DESC + "|" + ARRAY_DESC + ")"
)

regular

View Source 
const (
	PackageError              = PackageType(0x01)
	PackageRequest            = PackageType(0x02)
	PackageResponse           = PackageType(0x04)
	PackageHeartbeat          = PackageType(0x08)
	PackageRequest_TwoWay     = PackageType(0x10)
	PackageResponse_Exception = PackageType(0x20)
	PackageType_BitSize       = 0x2f
)

enum part

View Source 
const (
	DUBBO = "dubbo"
)
View Source 
const (
	// Zero : byte zero
	Zero = byte(0x00)
)

Variables

View Source 
var (
	DubboRequestHeaderBytesTwoWay = [HEADER_LENGTH]byte{MAGIC_HIGH, MAGIC_LOW, FLAG_REQUEST | FLAG_TWOWAY}
	DubboRequestHeaderBytes       = [HEADER_LENGTH]byte{MAGIC_HIGH, MAGIC_LOW, FLAG_REQUEST}
	DubboResponseHeaderBytes      = [HEADER_LENGTH]byte{MAGIC_HIGH, MAGIC_LOW, Zero, Response_OK}
	DubboRequestHeartbeatHeader   = [HEADER_LENGTH]byte{MAGIC_HIGH, MAGIC_LOW, FLAG_REQUEST | FLAG_TWOWAY | FLAG_EVENT}
	DubboResponseHeartbeatHeader  = [HEADER_LENGTH]byte{MAGIC_HIGH, MAGIC_LOW, FLAG_EVENT}
)

Dubbo request response related consts

View Source 
var (
	ErrHeaderNotEnough = errors.New("header buffer too short")
	ErrBodyNotEnough   = errors.New("body buffer too short")
	ErrJavaException   = errors.New("got java exception")
	ErrIllegalPackage  = errors.New("illegal package!")
)

Error part

View Source 
var (
	DubboVersionKey = "dubboVersion"
	ArgsTypesKey    = "argsTypes"
	ArgsKey         = "args"
	ServiceKey      = "service"
	AttachmentsKey  = "attachments"
)

Body map keys

View Source 
var DescRegex, _ = regexp.Compile(DESC_REGEX)

DescRegex ...

View Source 
var NilValue = reflect.Zero(reflect.TypeOf((*interface{})(nil)).Elem())

Functions

func GetSerializerById 

func GetSerializerById(id byte) (interface{}, error)

func LoadSerializer 

func LoadSerializer(p *DubboPackage) error

func SetSerializer 

func SetSerializer(name string, serializer interface{})

func ToMapStringInterface 

func ToMapStringInterface(origin map[interface{}]interface{}) map[string]interface{}

Types

type DubboHeader 

type DubboHeader struct {
	SerialID       byte
	Type           PackageType
	ID             int64
	BodyLen        int
	ResponseStatus byte
}

type DubboPackage 

type DubboPackage struct {
	Header  DubboHeader
	Service Service
	Body    interface{}
	Err     error
	Codec   *ProtocolCodec
}

func NewDubboPackage 

func NewDubboPackage(data *bytes.Buffer) *DubboPackage

func (DubboPackage) GetBody 

func (p DubboPackage) GetBody() interface{}

func (DubboPackage) GetBodyLen 

func (p DubboPackage) GetBodyLen() int

func (DubboPackage) GetHeader 

func (p DubboPackage) GetHeader() DubboHeader

func (DubboPackage) GetLen 

func (p DubboPackage) GetLen() int

func (DubboPackage) GetService 

func (p DubboPackage) GetService() Service

func (DubboPackage) IsHeartBeat 

func (p DubboPackage) IsHeartBeat() bool

func (DubboPackage) IsRequest 

func (p DubboPackage) IsRequest() bool

func (DubboPackage) IsResponse 

func (p DubboPackage) IsResponse() bool

func (DubboPackage) IsResponseWithException 

func (p DubboPackage) IsResponseWithException() bool

func (*DubboPackage) Marshal 

func (p *DubboPackage) Marshal() (*bytes.Buffer, error)

func (*DubboPackage) ReadHeader 

func (p *DubboPackage) ReadHeader() error

func (*DubboPackage) SetBody 

func (p *DubboPackage) SetBody(body interface{})

func (*DubboPackage) SetHeader 

func (p *DubboPackage) SetHeader(header DubboHeader)

func (*DubboPackage) SetID 

func (p *DubboPackage) SetID(id int64)

func (*DubboPackage) SetResponseStatus 

func (p *DubboPackage) SetResponseStatus(status byte)

func (*DubboPackage) SetSerializer 

func (p *DubboPackage) SetSerializer(serializer Serializer)

func (*DubboPackage) SetService 

func (p *DubboPackage) SetService(svc Service)

func (DubboPackage) String 

func (p DubboPackage) String() string

func (*DubboPackage) Unmarshal 

func (p *DubboPackage) Unmarshal() error

type HessianSerializer 

type HessianSerializer struct {
}

func (HessianSerializer) Marshal 

func (h HessianSerializer) Marshal(p DubboPackage) ([]byte, error)

func (HessianSerializer) Unmarshal 

func (h HessianSerializer) Unmarshal(input []byte, p *DubboPackage) error

type PackageType 

type PackageType int

type ProtocolCodec 

type ProtocolCodec struct {
	// contains filtered or unexported fields
}

func NewDubboCodec 

func NewDubboCodec(reader *bufio.Reader) *ProtocolCodec

func (*ProtocolCodec) Decode 

func (c *ProtocolCodec) Decode(p *DubboPackage) error

func (*ProtocolCodec) Encode 

func (c *ProtocolCodec) Encode(p DubboPackage) ([]byte, error)

func (*ProtocolCodec) EncodeHeader 

func (c *ProtocolCodec) EncodeHeader(p DubboPackage) []byte

func (*ProtocolCodec) ReadHeader 

func (c *ProtocolCodec) ReadHeader(header *DubboHeader) error

func (*ProtocolCodec) SetSerializer 

func (c *ProtocolCodec) SetSerializer(serializer Serializer)

type RequestPayload 

type RequestPayload struct {
	Params      interface{}
	Attachments map[string]interface{}
}

func EnsureRequestPayload 

func EnsureRequestPayload(body interface{}) *RequestPayload

func NewRequestPayload 

func NewRequestPayload(args interface{}, atta map[string]interface{}) *RequestPayload

type ResponsePayload 

type ResponsePayload struct {
	RspObj      interface{}
	Exception   error
	Attachments map[string]interface{}
}

func EnsureResponsePayload 

func EnsureResponsePayload(body interface{}) *ResponsePayload

func NewResponsePayload 

func NewResponsePayload(rspObj interface{}, exception error, attachments map[string]interface{}) *ResponsePayload

NewResponse create a new ResponsePayload

type Serializer 

type Serializer interface {
	Marshal(p DubboPackage) ([]byte, error)
	Unmarshal([]byte, *DubboPackage) error
}

type Service 

type Service struct {
	Path      string
	Interface string
	Group     string
	Version   string
	Method    string
	Timeout   time.Duration // request timeout
}

Service defines service instance

Source Files

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