英文:
Using Golang json.NewDecoder / json.NewEncoder
问题
我是你的中文翻译助手，以下是翻译好的内容：
我是一个完全不懂Go语言的新手，我正在尝试理解我在这里缺少了什么。我期望使用dec.Decode循环遍历JSON值，并最终得到一个响应的映射。但我得到的是整个JSON字符串作为映射的第一个元素的键。我错过了什么？
示例响应：
2015/03/02 10:03:16 map[error:invalid_request error_description:that is not a recognized WePay API call error_code:1001] map[string]interface {}
package mainimport ("encoding/json""io""log""net/http""reflect")func main() {var v map[string]interface{}resp, err := http.Get("https://wepayapi.com/v2/")if err != nil {log.Println("Error: " + err.Error())}defer resp.Body.Close()// resp.Body is an io.ReadCloser... NewDecoder expects an io.Readerdec := json.NewDecoder(resp.Body)// Decode reads the next JSON-encoded value from its input and stores it in the value pointed to by v.for err := dec.Decode(&v); err != nil && err != io.EOF; {log.Println("ERROR: " + err.Error())return}log.Println(v, reflect.TypeOf(v))}
英文:
I'm a total noob at go and I'm trying to understand what I'm missing here. I'm expecting to use dec.Decode to loop over the json values and end up with a map of the response. What I'm getting is the entire json string as the key to the first element of the map. What am I missing?
Example response:
2015/03/02 10:03:16 map[error:invalid_request error_description:that is not a recognized WePay API call error_code:1001] map[string]interface {}
package mainimport ("encoding/json""io""log""net/http""reflect")func main() {var v map[string]interface{}resp, err := http.Get("https://wepayapi.com/v2/")if err != nil {log.Println("Error: " + err.Error())}defer resp.Body.Close()// resp.Body is an io.ReadCloser... NewDecoder expects an io.Readerdec := json.NewDecoder(resp.Body)// Decode reads the next JSON-encoded value from its input and stores it in the value pointed to by v.for err := dec.Decode(&v); err != nil && err != io.EOF; {log.Println("ERROR: " + err.Error())return}log.Println(v, reflect.TypeOf(v))}
答案1
得分: 2
Decoder会一次性解码整个JSON值（在这种情况下是错误对象），你不需要在循环中调用它：
if err := dec.Decode(&v); err != nil {log.Println("ERROR: " + err.Error())return}
作为响应，你会得到一个等价于这个JSON的映射：
{"error": "invalid_request","error_description": "that is not a recognized WePay API call","error_code": 1001}
结果：
map[string]interface{} {"error": "invalid_request","error_description": "that is not a recognized WePay API call","error_code": 1001,}
英文:
Decoder will decode the whole JSON value at once (in this case the error object), you don;y have to call it in a loop:
if err := dec.Decode(&v); err != nil {log.Println("ERROR: " + err.Error())return}
As a response you get a map equavalent of this JSON:
{"error":"invalid_request","error_description":"that is not a recognized WePay API call","error_code":1001}
Result:
map[string]interface{} {"error":"invalid_request","error_description":"that is not a recognized WePay API call","error_code":1001,}
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