英文:
Pull API request into nested struct
问题
我目前正在将一个API响应解析为结构体。
对于正常的响应，我可以接受这样的格式：
[
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"}
]
然而，当我得到这样的数据时：
"urls": [
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"}
]
我无法将其解析为结构体。
这似乎是一个愚蠢的问题，因为它基本上是相同的。
以下是我的代码：
type urls struct {
Urls []struct {
Date string `json:"date"`
User string `json:"user"`
Url string `json:"url"`
} `json:"urls"`
}
type url []urls
func main() {
resp, err := http.Get("https://url")
if err != nil {
fmt.Println("No response from request")
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
var u url
_ = json.Unmarshal(body, &u)
// 处理解析后的数据
}
不幸的是，这并不起作用，u 是空的。
对于第一个响应，我可以使用以下结构体，并且可以正常工作：
type urls struct {
Date string `json:"date"`
User string `json:"user"`
Url string `json:"url"`
}
希望这能帮到你！
英文:
I'm currently pulling an API response into a struct.
I'm fine with a normal response of say:
[
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
]
However when I get data like this:
"urls": [
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
{"date":"2021-10-04","user":"Test","url":"Anonymous"]},
]
I cant seem to parse it to the struct.
It seems like a stupid question as its basically the same.
Here is what I am doing:
type urls struct {
Urls struct {
Date string `json:"date"`
User string `json:"user"`
Urls string `json:"urls"`
} `json:"urls"`
}
type url []urls
and within the function:
resp, err := http.Get("https://url")
if err != nil {
fmt.Println("No response from request")
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body) // response body is []byte
var u url
_ = json.Unmarshal(body, &u)
Unfortunately this isnt working and u is empty.
With the first response I can have a struct like this and it works fine:
type urls struct {
Date string `json:"date"`
User string `json:"user"`
Urls string `json:"urls"`
}
答案1
得分: 0
我认为我想说的是以上内容的结合，再加上一点我的经验。
- 在JSON中，你的Urls字段是一个数组，但在你声明的结构体中不是。
- 你不应该忽略json.Unmarshal(body, &u)返回的错误。
- 你发布的Json不符合语法规范。
我稍微修改了你的Json字符串，可以是这样的：
{
"urls": [
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"}
]
}
对应的Go结构体应该是：
type URL struct {
SubURLs []struct {
Date string `json:"date"`
User string `json:"user"`
URL string `json:"url"`
} `json:"urls"`
}
接下来，我向你介绍一种处理JSON到Go结构体的可能方法：
你可以将你的Json粘贴到这个网站上，然后你就可以得到相应的Go结构体，你也可以通过这种方式来纠正你的Json。
英文:
I think what I'm trying to say is a combination of the above and plus a little bit of my experience.
- Your Urls field is an array in JSON, but not in the struct you declared.
- You should not ignore the error returned by json.Unmarshal(body, &u) .
- The Json you posted is not grammatically correct.
I modified your Json string slightly, it could be:
{
"urls": [
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"},
{"date":"2021-10-04","user":"Test","url":"Anonymous"}
]
}
And to Go struct should be:
type URL struct {
SubURLs []struct {
Date string `json:"date"`
User string `json:"user"`
URL string `json:"url"`
} `json:"urls"`
}
Next, I introduce you to one possible way when you are dealing with JSON to Go structs:
You can paste your Json on this website, and then you can get its corresponding Go structure, and you can also correct your Json by the way.
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