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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package codec
import (
"net"
"strconv"
"github.com/ethereum/go-ethereum/rpc/shared"
)
type Codec int
// (de)serialization support for rpc interface
type ApiCoder interface {
// Parse message to request from underlying stream
ReadRequest() ([]*shared.Request, bool, error)
// Parse response message from underlying stream
ReadResponse() (interface{}, error)
// Encode response to encoded form in underlying stream
WriteResponse(interface{}) error
// Decode single message from data
Decode([]byte, interface{}) error
// Encode msg to encoded form
Encode(msg interface{}) ([]byte, error)
// close the underlying stream
Close()
}
// supported codecs
const (
JSON Codec = iota
nCodecs
)
var (
// collection with supported coders
coders = make([]func(net.Conn) ApiCoder, nCodecs)
)
// create a new coder instance
func (c Codec) New(conn net.Conn) ApiCoder {
switch c {
case JSON:
return NewJsonCoder(conn)
}
panic("codec: request for codec #" + strconv.Itoa(int(c)) + " is unavailable")
}
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