Use the net/http.Post function to send a POST request and obtain the response status code and response content

Use the net/http.Post function to send a POST request and get the response status code and response content

In developing web applications, we often need to interact with other web services, such as sending requests and getting responses. . Using the Post function in the net/http package of the Go language, we can easily send a POST request and obtain the response status code and response content.

The following is a sample code that demonstrates how to use the net/http.Post function to send a POST request and obtain the response status code and response content:

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "strings"
)

func main() {
    url := "https://api.example.com/endpoint"
    payload := strings.NewReader("key1=value1&key2=value2")

    // 创建一个http.Client对象
    client := &http.Client{}

    // 创建POST请求，参数为URL、数据类型和数据
    req, err := http.NewRequest("POST", url, payload)
    if err != nil {
        fmt.Println("创建请求失败:", err)
        return
    }

    // 设置请求头信息
    req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

    // 发送请求并获取响应
    resp, err := client.Do(req)
    if err != nil {
        fmt.Println("发送请求失败:", err)
        return
    }
    defer resp.Body.Close()

    // 获取响应状态码
    fmt.Println("响应状态码:", resp.StatusCode)

    // 读取响应内容
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("读取响应失败:", err)
        return
    }

    // 打印响应内容
    fmt.Println("响应内容:", string(body))
}

In the above example, we first specified Target URL and request data. Then, we create an http.Client object which will be used to send requests and receive responses. Next, we create an http.Request object and pass it to the http.Post function. When creating the request, we set the request type to "POST" and passed the URL and request data. We also set the request header information and specified the type of request data as "application/x-www-form-urlencoded".

Then, we use the client.Do function to send the request and get the response. We can use resp.StatusCode to get the status code of the response, and use the ioutil.ReadAll function to read the content of the response. Finally, we print out the response status code and response content.

It should be noted that this is just a simple example and may need to be modified and expanded according to actual conditions in actual applications. For example, you can increase the robustness of your code by setting request headers, handling timeouts, and retries. Additionally, you need to handle errors that may occur, such as network connection errors or error messages returned by the server.

In summary, using the Post function in the net/http package can easily send a POST request and obtain the response status code and response content. This is useful for interacting with other web services, such as calling third-party APIs or sending form data. Whether it is a simple test request or complex data interaction, the Go language network package provides many convenient functions and methods that can make our development work more efficient and convenient.

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