go语言实现聊天服务器

用go语言实现一对一聊天服务器（服务器与客户端）

1）服务器开启，等待来自客户端的连接

2）客户端连接服务器，与服务器实现一对一聊天，输入close关闭与服务器连接

3）服务器收到close字符串，关闭当前连接，继续等待下一个客户端连接

server

// server project main.go
package main

import (
	"fmt"
	"net"
)

//var ConnMap map[string]*net.TCPConn

func main() {
	listen_socket, err := net.Listen("tcp", "127.0.0.1:8000")
	if err != nil {
		fmt.Println("server start error")
	}

	defer listen_socket.Close()
	fmt.Println("server is wating ....")

	for {
		conn, err := listen_socket.Accept()
		if err != nil {
			fmt.Println("conn fail ...")
		}
		fmt.Println("connect client successed")

		var msg string
		for {
			msg = ""
			data := make([]byte, 255)
			msg_read, err := conn.Read(data)
			if msg_read == 0 || err != nil {
				break
			}

			msg_read_str := string(data[0:msg_read])
			if msg_read_str == "close" {
				conn.Write([]byte("close"))
				break
			}
			//fmt.Println(string(data[0:msg_read]))
			fmt.Println("client say: ", msg_read_str)

			fmt.Printf("say to client: ")
			fmt.Scan(&msg)
			//conn.Write([]byte("hello client\n"))
			//msg_write := []byte(msg)
			conn.Write([]byte(msg))
		}
		fmt.Println("client Close\n")
		conn.Close()
	}

}

client

// client project main.go
package main

import (
	"fmt"
	"net"
)

func main() {
	conn, err := net.Dial("tcp", "127.0.0.1:8000")
	if err != nil {
		fmt.Println("conn fail...")
	}
	
	fmt.Println("connect server successed")

	var msg string

	for {
		msg = ""
		fmt.Printf("say to server: ")
		fmt.Scan(&msg)
		//fmt.Println(msg)
		//msg_write := []byte(msg)
		//conn.Write(msg_write)
		conn.Write([]byte(msg))
		//fmt.Println([]byte(msg))

		data := make([]byte, 255)
		msg_read, err := conn.Read(data)
		if msg_read == 0 || err != nil {
			break
		}
		msg_read_str := string(data[0:msg_read])
		if msg_read_str == "close" {
			conn.Write([]byte("close"))
			break
		}

		fmt.Println("server say:", msg_read_str)
	}
	conn.Close()
}

程序截图：

go语言实现多人聊天 链接：https://blog.csdn.net/dyd961121/article/details/81252920