如何使用GO从外部API获取数据?

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英文:

How to get data from external api using GO?

问题

我有外部数据,需要从中获取数据,并从 API 端点获取结果。

{
  "data": [
    {
      "id": 30002005,
      "name": "test",
      "info": "{\"Version\":\"7.0.484\",\"CompanyName\":\"test\"}"
    },
    ......
  ]
}

我需要获取这些数据并重新格式化到我的情况中(将数据放入结构体中,然后进行其他操作)。

Go 代码如下:

type OldData struct {
	Id   string `json:"id"`
	Name string `json:"name"`
}

func Index() {
	url := "https://exmaple.com/api/posts"
	var bearer = "Bearer XXXXXX"

	req, err := http.NewRequest("GET", url, nil)
	req.Header.Add("Authorization", bearer)

	client := &http.Client{}

	resp, err := client.Do(req)
	if err != nil {
		log.Println(err)
	}

	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)

	if err != nil {
		log.Println(err)
	}

	var record OldData

	json.Unmarshal(body, &record)

	fmt.Println(record)
}

fmt.Println(record) 的结果是 {}

更新

我为 info 创建了一个结构体:

type OldData struct {
    Id   string `json:"id"`
    Name string `json:"name"`
    Info string `json:"info"`
}

type Info struct {
	Version     string `json:"Version"`
	CompanyName string `json:"CompanyName"`
}
英文:

I have external data I need to get data from it and this result from an API endpoint

{
  "data": [
    {
      "id": 30002005,
      "name": "test",
      "info": "{"Version":"7.0.484","CompanyName":"test"}",
    },
    ......
  ]
}

I need to get this data and reformat it to my case (put the data into struct then do whatever i need).

The go code:

type OldData struct {
	Id            string `json:"id"`
	Name          string `json:"name"`
}

func Index() {

	url := "https://exmaple.com/api/posts"
	var bearer = "Bearer XXXXXX"

	req, err := http.NewRequest("GET", url, nil)
	req.Header.Add("Authorization", bearer)

	client := &http.Client{}

	resp, err := client.Do(req)
	if err != nil {
		log.Println(err)
	}

	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)

	if err != nil {
		log.Println(err)
	}

	var record OldData

	json.Unmarshal(body, &record)

	fmt.Println(record)
}

The result of fmt.Println(record) is { }

Update

I create thrid for info :

type OldData struct {
    Id            string `json:"id"`
    Name          string `json:"name"`
    Info          string `json:"info"`
}

type Info struct {
	Version     string `json:"Version"`
	CompanyName string `json:"CompanyName"`
}

答案1

得分: 3

在JSON中有一个名为data的数组。你正在尝试将其解组为一个单独的结构体。试着定义一个结构体,其中包含一个名为data的切片字段:

type OldData struct {
    Id   string `json:"id"`
    Name string `json:"name"`
}

type OldDataItems struct {
    Data []OldData `json:"data"`
}

现在尝试将其解组为OldDataItems的实例。

英文:

In the JSON there is an array, named data. You're trying to unmarshal it to a single struct. Try to define a struct which has a data field which is a slice:

type OldData struct {
    Id            string `json:"id"`
    Name          string `json:"name"`
}

type OldDataItems struct {
    Data []OldData `json:"data"`
}

Now try to unmarshal into an instance of OldDataItems.

huangapple
  • 本文由 发表于 2022年5月24日 20:59:52
  • 转载请务必保留本文链接:https://go.coder-hub.com/72363361.html
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