golang语言发送json格式的http请求

golang语言发送json格式的http请求

 

1、发送普通的GET请求

func testGet() {

url := "https://baidu.com"

req, err := http.NewRequest("GET", url, nil)

client := &http.Client{}

resp, err := client.Do(req)

if err != nil {

panic(err)

}

defer resp.Body.Close()

fmt.Println("response Status:", resp.Status)

fmt.Println("response Headers:", resp.Header)

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

fmt.Println("response Body:", string(body))

}

 

返回结果：

response Status: 200 OK

response Headers: map[Content-Type:[text/html] Vary:[Accept-Encoding] ]

response Body: 

 

2、发送json为参数的post请求

 

可以直接用字符串拼写出json格式

func testPost(id int, name string) {

requestBody := fmt.Sprintf(`{

"id":%d",

"name": "%s"

}`, id, name)

var jsonStr = []byte(requestBody)

url := "https://test.com"

req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))

req.Header.Set("Content-Type", "application/json")

client := &http.Client{}

resp, err := client.Do(req)

if err != nil {

panic(err)

}

defer resp.Body.Close()



fmt.Println("response Status:", resp.Status)

fmt.Println("response Headers:", resp.Header)

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

fmt.Println("response Body:", string(body))

}

 

也可以用struct进行转化，比如这样

type RequestBody struct {

Id int `json:"id"`

Name string `json:"name"`

}



func testPost(id int, name string) {

request := RequestBody{

Id: id,

Name: name,

}

requestBody := new(bytes.Buffer)

json.NewEncoder(requestBody).Encode(request)

url := "https://test.com"

req, err := http.NewRequest("POST", url, requestBody)

req.Header.Set("Content-Type", "application/json")

client := &http.Client{}

resp, err := client.Do(req)

if err != nil {

panic(err)

}

defer resp.Body.Close()



fmt.Println("response Status:", resp.Status)

fmt.Println("response Headers:", resp.Header)

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

fmt.Println("response Body:", string(body))

}

 

 3、对返回的json结果进行解析

 

同样是使用struct进行解析,例如返回的json为

{

"id": 1,

"name": "zhangsan"

}

 

则对应的代码为

type UserInfo struct {

Id string `json:"id"`

Name string `json:"name"`

}



func ParseResponse(input string) [] UserInfo {

var user UserInfo

if err := json.Unmarshal([]byte(string(input)), &user); err == nil {

fmt.Println(user.Id)

fmt.Println(user.Name)

} else {

fmt.Println(err)

}

}