Golangnet/http处理Header详解

client := &http.Client{}
req, err := http.NewRequest("GET", "https://httpbin.org/headers", nil)
if err != nil {
    log.Fatal(err)
}

// 设置自定义Header
req.Header.Set("User-Agent", "MyApp/1.0")
req.Header.Set("X-Request-ID", "12345")
req.Header.Set("Authorization", "Bearer token123")

resp, err := client.Do(req)
if err != nil {
    log.Fatal(err)
}
defer resp.Body.Close()

// 读取响应内容
body, _ := io.ReadAll(resp.Body)
fmt.Println(string(body))

req.Header.Add("Accept", "application/json")
req.Header.Add("Accept", "text/html")

resp, err := http.Get("https://httpbin.org/get")
if err != nil {
    log.Fatal(err)
}
defer resp.Body.Close()

// 遍历所有Header
for key, values := range resp.Header {
    for _, value := range values {
        fmt.Printf("%s: %s\n", key, value)
    }
}

// 获取特定Header
contentType := resp.Header.Get("Content-Type")
fmt.Println("Content-Type:", contentType)

http.HandleFunc("/info", func(w http.ResponseWriter, r *http.Request) {
    // 获取User-Agent
    userAgent := r.Header.Get("User-Agent")
    fmt.Fprintf(w, "User-Agent: %s\n", userAgent)

    // 获取Authorization
    auth := r.Header.Get("Authorization")
    fmt.Fprintf(w, "Authorization: %s\n", auth)

    // 遍历所有Header
    for name, headers := range r.Header {
        for _, h := range headers {
            fmt.Fprintf(w, "%v: %v\n", name, h)
        }
    }
})

http.ListenAndServe(":8080", nil)