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61 lines
1.8 KiB
61 lines
1.8 KiB
// Copyright 2009 The Go Authors. All rights reserved.
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// Copyright 2012-2013 The Gorilla Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package json
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import (
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"encoding/json"
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"fmt"
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"io"
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"math/rand"
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)
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// ----------------------------------------------------------------------------
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// Request and Response
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// ----------------------------------------------------------------------------
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// clientRequest represents a JSON-RPC request sent by a client.
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type clientRequest struct {
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// A String containing the name of the method to be invoked.
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Method string `json:"method"`
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// Object to pass as request parameter to the method.
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Params [1]interface{} `json:"params"`
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// The request id. This can be of any type. It is used to match the
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// response with the request that it is replying to.
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Id uint64 `json:"id"`
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}
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// clientResponse represents a JSON-RPC response returned to a client.
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type clientResponse struct {
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Result *json.RawMessage `json:"result"`
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Error interface{} `json:"error"`
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Id uint64 `json:"id"`
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}
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// EncodeClientRequest encodes parameters for a JSON-RPC client request.
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func EncodeClientRequest(method string, args interface{}) ([]byte, error) {
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c := &clientRequest{
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Method: method,
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Params: [1]interface{}{args},
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Id: uint64(rand.Int63()),
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}
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return json.Marshal(c)
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}
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// DecodeClientResponse decodes the response body of a client request into
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// the interface reply.
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func DecodeClientResponse(r io.Reader, reply interface{}) error {
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var c clientResponse
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if err := json.NewDecoder(r).Decode(&c); err != nil {
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return err
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}
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if c.Error != nil {
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return &Error{Data: c.Error}
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}
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if c.Result == nil {
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return fmt.Errorf("Unexpected null result")
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}
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return json.Unmarshal(*c.Result, reply)
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}
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