forked from blocktree/openwallet
/
api.go
156 lines (128 loc) · 3.47 KB
/
api.go
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/*
* Copyright 2018 The openwallet Authors
* This file is part of the openwallet library.
*
* The openwallet library 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 openwallet 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.
*/
package decred
import (
"crypto/tls"
"encoding/base64"
"errors"
"fmt"
"github.com/blocktree/openwallet/v2/log"
"github.com/imroc/req"
"github.com/tidwall/gjson"
"net/http"
)
// A Client is a Bitcoin RPC client. It performs RPCs over HTTP using JSON
// request and responses. A Client must be configured with a secret token
// to authenticate with other Cores on the network.
type Client struct {
BaseURL string
AccessToken string
Debug bool
client *req.Req
}
type Response struct {
Code int `json:"code,omitempty"`
Error interface{} `json:"error,omitempty"`
Result interface{} `json:"result,omitempty"`
Message string `json:"message,omitempty"`
Id string `json:"id,omitempty"`
}
func NewClient(url, token string, debug bool) *Client {
c := Client{
BaseURL: url,
AccessToken: token,
Debug: debug,
}
api := req.New()
trans, _ := api.Client().Transport.(*http.Transport)
trans.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
c.client = api
return &c
}
// Call calls a remote procedure on another node, specified by the path.
func (c *Client) Call(path string, request []interface{}) (*gjson.Result, error) {
var (
body = make(map[string]interface{}, 0)
)
if c.client == nil {
return nil, errors.New("API url is not setup. ")
}
authHeader := req.Header{
"Accept": "application/json",
"Authorization": "Basic " + c.AccessToken,
}
//json-rpc
body["jsonrpc"] = "2.0"
body["id"] = "1"
body["method"] = path
body["params"] = request
if c.Debug {
log.Info("Start Request API...")
}
r, err := c.client.Post(c.BaseURL, req.BodyJSON(&body), authHeader)
if c.Debug {
log.Info("Request API Completed")
}
if c.Debug {
log.Std.Info("%+v", r)
}
if err != nil {
return nil, err
}
resp := gjson.ParseBytes(r.Bytes())
err = isError(&resp)
if err != nil {
return nil, err
}
result := resp.Get("result")
return &result, nil
}
// See 2 (end of page 4) http://www.ietf.org/rfc/rfc2617.txt
// "To receive authorization, the client sends the userid and password,
// separated by a single colon (":") character, within a base64
// encoded string in the credentials."
// It is not meant to be urlencoded.
func basicAuth(username, password string) string {
auth := username + ":" + password
return base64.StdEncoding.EncodeToString([]byte(auth))
}
//isError 是否报错
func isError(result *gjson.Result) error {
var (
err error
)
/*
//failed 返回错误
{
"result": null,
"error": {
"code": -8,
"message": "Block height out of range"
},
"id": "foo"
}
*/
if !result.Get("error").IsObject() {
if !result.Get("result").Exists() {
return errors.New("Response is empty! ")
}
return nil
}
errInfo := fmt.Sprintf("[%d]%s",
result.Get("error.code").Int(),
result.Get("error.message").String())
err = errors.New(errInfo)
return err
}