How to set HTTP request headers in Golang?

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Release: 2024-06-04 20:00:59
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How to set HTTP request header? 1. Use the http.Header type, where the key is the header field name and the value is the header field value; 2. Use the Set() method to set a single header, and the Add() method to set multiple headers; 3. Get the header through the Get() method, Delete the header via the Del() method.

在 Golang 中如何设置 HTTP 请求头?

How to set HTTP request headers in Golang

Setting HTTP request headers in Go is very simple, just use http.Header type. http.Header is a key-value map, where the key is the header field name and the value is the header field value.

Set a single header

To set a single header, you can use the Set method:

import (
    "net/http"
    "fmt"
)

func main() {
    req, err := http.NewRequest("GET", "http://example.com", nil)
    if err != nil {
        // 处理错误
    }

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

To set multiple To get the header, you can use the Add method:

func main() {
    req, err := http.NewRequest("GET", "http://example.com", nil)
    if err != nil {
        // 处理错误
    }

    req.Header.Add("Content-Type", "application/json")
    req.Header.Add("Accept", "application/json")
}
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Get the header

To get the header, you can use the Get method:

func main() {
    req, err := http.NewRequest("GET", "http://example.com", nil)
    if err != nil {
        // 处理错误
    }

    contentType := req.Header.Get("Content-Type")
    fmt.Println(contentType) // "application/json"
}
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Delete the header

To delete the header, you can use the Del method:

func main() {
    req, err := http.NewRequest("GET", "http://example.com", nil)
    if err != nil {
        // 处理错误
    }

    req.Header.Del("Content-Type")
}
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Practical case

The following is a complete practical case to demonstrate how to set up, Get and delete HTTP request headers:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    // 创建一个新的请求
    req, err := http.NewRequest("GET", "http://example.com", nil)
    if err != nil {
        // 处理错误
    }

    // 设置一个头
    req.Header.Set("Content-Type", "application/json")

    // 获取一个头
    contentType := req.Header.Get("Content-Type")
    fmt.Println(contentType) // "application/json"

    // 删除一个头
    req.Header.Del("Content-Type")
}
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