第十章_网络编程，34_网络编程_http响应包格式

TCP写客户端，连接HTTP服务器，使用请求包访问服务器，打印服务器回复的响应报文。

源代码

package main

import (
	"fmt"
	"net"
)

func main() {
    
    
	//主动连接服务器
	conn, err1 := net.Dial("tcp", ":8000")
	if err1 != nil {
    
    
		fmt.Println("net.Dial err1 = ", err1)
		return
	}
	defer conn.Close()

	requestBuf := "GET /go HTTP/1.1\r\nAccept: image/gif, image/jpeg, image/pjpeg, application/x-ms-application, application/xaml+xml, application/x-ms-xbap, */*\r\nAccept-Language: zh-Hans-CN,zh-Hans;q=0.8,en-US;q=0.5,en;q=0.3\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729)\r\nAccept-Encoding: gzip, deflate\r\nHost: 127.0.0.1:8000\r\nConnection: Keep-Alive\r\n\r\n"

	conn.Write([]byte(requestBuf))
	buf := make([]byte, 1024*4)
	n, err2 := conn.Read(buf)
	if n == 0 {
    
    
		fmt.Println("conn.Read err2 = ", err2)
		return
	}

	//打印响应的报文
	fmt.Printf("#%v#", string(buf[:n]))
}

打印输出

//打印
//1、正常响应，GET /go
/*
#HTTP/1.1 200 OK							//状态行，状态码200
Date: Wed, 03 Mar 2021 12:58:18 GMT			//响应头部
Content-Length: 9
Content-Type: text/plain; charset=utf-8
											//空行
hello go									//响应包体
*/

//2、错误响应，GET /go(加错误路径)
/*
#HTTP/1.1 404 Not Found						//状态行，状态码404
Content-Type: text/plain; charset=utf-8
X-Content-Type-Options: nosniff
Date: Wed, 03 Mar 2021 12:59:40 GMT
Content-Length: 19

404 page not found
#
*/