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-# Codec
-
-High Performance, Feature-Rich Idiomatic Go codec/encoding library for
-binc, msgpack, cbor, json.
-
-Supported Serialization formats are:
-
- - msgpack: https://github.com/msgpack/msgpack
- - binc: http://github.com/ugorji/binc
- - cbor: http://cbor.io http://tools.ietf.org/html/rfc7049
- - json: http://json.org http://tools.ietf.org/html/rfc7159
- - simple:
-
-To install:
-
- go get github.com/ugorji/go/codec
-
-This package understands the `unsafe` tag, to allow using unsafe semantics:
-
- - When decoding into a struct, you need to read the field name as a string
- so you can find the struct field it is mapped to.
- Using `unsafe` will bypass the allocation and copying overhead of `[]byte->string` conversion.
-
-To use it, you must pass the `unsafe` tag during install:
-
-```
-go install -tags=unsafe github.com/ugorji/go/codec
-```
-
-Online documentation: http://godoc.org/github.com/ugorji/go/codec
-Detailed Usage/How-to Primer: http://ugorji.net/blog/go-codec-primer
-
-The idiomatic Go support is as seen in other encoding packages in
-the standard library (ie json, xml, gob, etc).
-
-Rich Feature Set includes:
-
- - Simple but extremely powerful and feature-rich API
- - Very High Performance.
- Our extensive benchmarks show us outperforming Gob, Json, Bson, etc by 2-4X.
- - Multiple conversions:
- Package coerces types where appropriate
- e.g. decode an int in the stream into a float, etc.
- - Corner Cases:
- Overflows, nil maps/slices, nil values in streams are handled correctly
- - Standard field renaming via tags
- - Support for omitting empty fields during an encoding
- - Encoding from any value and decoding into pointer to any value
- (struct, slice, map, primitives, pointers, interface{}, etc)
- - Extensions to support efficient encoding/decoding of any named types
- - Support encoding.(Binary|Text)(M|Unm)arshaler interfaces
- - Decoding without a schema (into a interface{}).
- Includes Options to configure what specific map or slice type to use
- when decoding an encoded list or map into a nil interface{}
- - Encode a struct as an array, and decode struct from an array in the data stream
- - Comprehensive support for anonymous fields
- - Fast (no-reflection) encoding/decoding of common maps and slices
- - Code-generation for faster performance.
- - Support binary (e.g. messagepack, cbor) and text (e.g. json) formats
- - Support indefinite-length formats to enable true streaming
- (for formats which support it e.g. json, cbor)
- - Support canonical encoding, where a value is ALWAYS encoded as same sequence of bytes.
- This mostly applies to maps, where iteration order is non-deterministic.
- - NIL in data stream decoded as zero value
- - Never silently skip data when decoding.
- User decides whether to return an error or silently skip data when keys or indexes
- in the data stream do not map to fields in the struct.
- - Encode/Decode from/to chan types (for iterative streaming support)
- - Drop-in replacement for encoding/json. `json:` key in struct tag supported.
- - Provides a RPC Server and Client Codec for net/rpc communication protocol.
- - Handle unique idiosynchracies of codecs e.g.
- - For messagepack, configure how ambiguities in handling raw bytes are resolved
- - For messagepack, provide rpc server/client codec to support
- msgpack-rpc protocol defined at:
- https://github.com/msgpack-rpc/msgpack-rpc/blob/master/spec.md
-
-## Extension Support
-
-Users can register a function to handle the encoding or decoding of
-their custom types.
-
-There are no restrictions on what the custom type can be. Some examples:
-
- type BisSet []int
- type BitSet64 uint64
- type UUID string
- type MyStructWithUnexportedFields struct { a int; b bool; c []int; }
- type GifImage struct { ... }
-
-As an illustration, MyStructWithUnexportedFields would normally be
-encoded as an empty map because it has no exported fields, while UUID
-would be encoded as a string. However, with extension support, you can
-encode any of these however you like.
-
-## RPC
-
-RPC Client and Server Codecs are implemented, so the codecs can be used
-with the standard net/rpc package.
-
-## Usage
-
-Typical usage model:
-
- // create and configure Handle
- var (
- bh codec.BincHandle
- mh codec.MsgpackHandle
- ch codec.CborHandle
- )
-
- mh.MapType = reflect.TypeOf(map[string]interface{}(nil))
-
- // configure extensions
- // e.g. for msgpack, define functions and enable Time support for tag 1
- // mh.SetExt(reflect.TypeOf(time.Time{}), 1, myExt)
-
- // create and use decoder/encoder
- var (
- r io.Reader
- w io.Writer
- b []byte
- h = &bh // or mh to use msgpack
- )
-
- dec = codec.NewDecoder(r, h)
- dec = codec.NewDecoderBytes(b, h)
- err = dec.Decode(&v)
-
- enc = codec.NewEncoder(w, h)
- enc = codec.NewEncoderBytes(&b, h)
- err = enc.Encode(v)
-
- //RPC Server
- go func() {
- for {
- conn, err := listener.Accept()
- rpcCodec := codec.GoRpc.ServerCodec(conn, h)
- //OR rpcCodec := codec.MsgpackSpecRpc.ServerCodec(conn, h)
- rpc.ServeCodec(rpcCodec)
- }
- }()
-
- //RPC Communication (client side)
- conn, err = net.Dial("tcp", "localhost:5555")
- rpcCodec := codec.GoRpc.ClientCodec(conn, h)
- //OR rpcCodec := codec.MsgpackSpecRpc.ClientCodec(conn, h)
- client := rpc.NewClientWithCodec(rpcCodec)
-