英文:
How to properly call JSON-RPC in Go?
问题
我一直在尝试不同的配置来调用Go中的一个简单的比特币JSON-RPC服务器，但是没有取得任何进展。
在Python中，整个代码看起来像这样：
from jsonrpc import ServiceProxyaccess = ServiceProxy("http://user:pass@127.0.0.1:8332")print access.getinfo()
但是在Go中，我似乎遇到了一些错误，比如“地址中有太多冒号”或“没有这样的主机”。我尝试使用rpc和rpc/jsonrpc两个包，使用Dial和DialHTTP方法，使用各种网络参数，但仍然无法取得任何进展。
那么，我该如何正确地调用Go中的JSON-RPC服务器？
英文:
I've been trying various configurations in order to call a simple JSON-RPC server for Bitcoin in Go, but didn't manage to get anywhere.
In Python, the entire code looks like:
from jsonrpc import ServiceProxyaccess = ServiceProxy("http://user:pass@127.0.0.1:8332")print access.getinfo()
But in Go, I seem to be bumping into erros like "too many colons in address", or "no such host". I've tried using both of the packages rpc and rpc/jsonrpc, using methods Dial and DialHTTP, using various network parameters and still can't get anywhere.
So, how do I properly call a JSON-RPC server in Go?
答案1
得分: 11
The jsonrpc package doesn't support json-rpc over HTTP at the moment. So, you can't use that, sorry.
But the jsonrpc specification is quite simple and it's probably quite easy to write your own jsonrpchttp (oh, I hope you know a better name) package.
I was able to call "getinfo" succesfully using the following (horrible) code:
package mainimport ("encoding/json""io/ioutil""log""net/http""strings")func main() {data, err := json.Marshal(map[string]interface{}{"method": "getinfo","id": 1,"params": []interface{}{},})if err != nil {log.Fatalf("Marshal: %v", err)}resp, err := http.Post("http://bob:secret@127.0.0.1:8332","application/json", strings.NewReader(string(data)))if err != nil {log.Fatalf("Post: %v", err)}defer resp.Body.Close()body, err := ioutil.ReadAll(resp.Body)if err != nil {log.Fatalf("ReadAll: %v", err)}result := make(map[string]interface{})err = json.Unmarshal(body, &result)if err != nil {log.Fatalf("Unmarshal: %v", err)}log.Println(result)}
Maybe you can clean it up a bit by implementing the rpc.ClientCodec interface (see jsonrpc/client.go for an example). Then you can take advantage of Go's rpc package.
英文:
The jsonrpc package doesn't support json-rpc over HTTP at the moment. So, you can't use that, sorry.
But the jsonrpc specification is quite simple and it's probably quite easy to write your own jsonrpchttp (oh, I hope you know a better name) package.
I was able to call "getinfo" succesfully using the following (horrible) code:
package mainimport ("encoding/json""io/ioutil""log""net/http""strings")func main() {data, err := json.Marshal(map[string]interface{}{"method": "getinfo","id": 1,"params": []interface{}{},})if err != nil {log.Fatalf("Marshal: %v", err)}resp, err := http.Post("http://bob:secret@127.0.0.1:8332","application/json", strings.NewReader(string(data)))if err != nil {log.Fatalf("Post: %v", err)}defer resp.Body.Close()body, err := ioutil.ReadAll(resp.Body)if err != nil {log.Fatalf("ReadAll: %v", err)}result := make(map[string]interface{})err = json.Unmarshal(body, &result)if err != nil {log.Fatalf("Unmarshal: %v", err)}log.Println(result)}
Maybe you can clean it up a bit by implementing the rpc.ClientCodec interface (see jsonrpc/client.go for an example). Then you can take advantage of Go's rpc package.
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