英文:
Having trouble decoding JSON response
问题
这是我在Go语言中的第一次尝试，我觉得我在这里漏掉了一些重要的东西。我试图从一个Web服务解码一个JSON消息，但我得到的输出是：
{response:{requests:[]}}
我真正感兴趣的只是请求节点中的数据。我的for循环显然没有被调用，因为数组是空的。我觉得我的结构体需要按照它们在Web服务中的出现顺序进行声明？
示例JSON：
{
"response": {
"requests": [
{
"request": {}
},
{
"request": {
"id": 589748,
"image_thumbnail": "",
"description": "Blah blah",
"status": "received",
"user": "test"
}
}
],
"count": "50",
"benchmark": 0.95516896247864,
"status": {},
"debug": {}
}
}
type Request struct {
id int json:"id"
description string json:"description"
user string json:"user"
}
type Requests struct {
request Request json:"request"
}
type Response struct {
requests []Requests json:"requests"
}
type RootObject struct {
response Response json:"response"
}
url := "
req, err := http.NewRequest("GET", url, nil)
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
var r RootObject
decoder := json.NewDecoder(resp.Body)
decoder.Decode(&r)
fmt.Printf("%+v", r)
for _, req := range r.response.requests {
fmt.Printf("%d = %s\n", req.request.id, req.request.user)
}
英文:
This is my first attempt at Go and I feel I'm missing something important here. Trying to decode a JSON message from a webservice but the output I'm getting is:
{response:{requests:[]}}
All I'm really interested in is the data within the request node. My for-loop obviously isn't getting called because the array is empty. I feel like my structs need to be declared exactly as they appear in the webservice?
Sample JSON:
{
"response": {
"requests": [
{
"request": {}
},
{
"request": {
"id": 589748,
"image_thumbnail": "",
"description": "Blah blah",
"status": "received",
"user": "test"
}
}
],
"count": "50",
"benchmark": 0.95516896247864,
"status": {},
"debug": {}
}
}
type Request struct {
id int `json:"id"`
description string `json:"description"`
user string `json:"user"`
}
type Requests struct {
request Request `json:"request"`
}
type Response struct {
requests []Requests `json:"requests"`
}
type RootObject struct {
response Response `json:"response"`
}
url := "<webservice>"
req, err := http.NewRequest("GET", url, nil)
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
var r RootObject
decoder := json.NewDecoder(resp.Body)
decoder.Decode(&r)
fmt.Printf("%+v", r)
for _, req := range r.response.requests {
fmt.Printf("%d = %s\n", req.request.id, req.request.user)
}
答案1
得分: 2
字段名称需要以大写字母开头才能导出为标识符。
英文:
Field names need to begin with upper case character to be exported identifiers.
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