golang基于websocket实现的简易聊天室程序

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2016-07-22

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本文实例讲述了golang基于websocket实现的简易聊天室。分享给大家供大家参考，具体如下：

先说点无关的,最近忙于工作没有更新博客,今天休息顺便把golang websocket研究了一下,挺好玩的,写了一个聊天室,分享给大家.

websocket包 : code.google.com/p/go.net/websocket

文档 : http://go.pkgdoc.org/code.google.com/p/go.net/websocket

首先安装websocket包

代码如下：

go get code.google.com/p/go.net/websocket

下来就是聊天室代码了,呵呵

golang websocket 聊天室

代码如下：

package main

import (

    "fmt"

    "io"

    "bufio"

    "net/http"

    "code.google.com/p/go.net/websocket"

    "container/list"

)

var connid int

var conns *list.List

func ChatroomServer(ws *websocket.Conn) {

    defer ws.Close()

    connid++

    id := connid

    fmt.Printf("connection id: %d\n", id)

    item := conns.PushBack(ws)

    defer conns.Remove(item)

    name := fmt.Sprintf("user%d", id)

    SendMessage(nil, fmt.Sprintf("welcome %s join\n", name))

    r := bufio.NewReader(ws)

    for {

        data, err := r.ReadBytes('\n')

        if err != nil {

            fmt.Printf("disconnected id: %d\n", id)

            SendMessage(item, fmt.Sprintf("%s offline\n", name))

            break

        }

        fmt.Printf("%s: %s", name, data)

        SendMessage(item, fmt.Sprintf("%s\t> %s", name, data))

    }

}

func SendMessage(self *list.Element, data string) {

    // for _, item := range conns {

    for item := conns.Front(); item != nil; item = item.Next() {

        ws, ok := item.Value.(*websocket.Conn)

        if !ok {

            panic("item not *websocket.Conn")

        }

        if item == self {

            continue

        }

        io.WriteString(ws, data)

    }

}

// 网页客户端

func Client(w http.ResponseWriter, r *http.Request) {

    html := `<!doctype html>

<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>golang websocket chatroom</title>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>

    <script>

        var ws = new WebSocket("ws://127.0.0.1:6611/chatroom");

        ws.onopen = function(e){

            console.log("onopen");

            console.dir(e);

        };

        ws.onmessage = function(e){

            console.log("onmessage");

            console.dir(e);

            $('#log').append('<p>'+e.data+'<p>');

            $('#log').get(0).scrollTop = $('#log').get(0).scrollHeight;

        };

        ws.onclose = function(e){

            console.log("onclose");

            console.dir(e);

        };

        ws.onerror = function(e){

            console.log("onerror");

            console.dir(e);

        };

        $(function(){

            $('#msgform').submit(function(){

                ws.send($('#msg').val()+"\n");

                $('#log').append('<p style="color:red;">My > '+$('#msg').val()+'<p>');

                $('#log').get(0).scrollTop = $('#log').get(0).scrollHeight;

                $('#msg').val('');

                return false;

            });

        });

    </script>

</head>

<body>

    <div id="log" style="height: 300px;overflow-y: scroll;border: 1px solid #CCC;">

    </div>

    <div>

        <form id="msgform">

            <input type="text" id="msg" size="60" />

        </form>

    </div>

</body>

</html>`

    io.WriteString(w, html)

}

func main() {

    fmt.Printf(`Welcome chatroom server!

author: dotcoo zhao

url: http://www.dotcoo.com/golang-websocket-chatroom

`)

    connid = 0

    conns = list.New()

    http.Handle("/chatroom", websocket.Handler(ChatroomServer));

    http.HandleFunc("/", Client);

    err := http.ListenAndServe(":6611", nil);

    if err != nil {

        panic("ListenAndServe: " + err.Error())

    }

}

简陋了些,但是基本功能都有了.

golang websocket 客户端

代码如下：

package main

import (

    "fmt"

    "bufio"

    "io"

    "os"

    "code.google.com/p/go.net/websocket"

)

func Command(ws *websocket.Conn) {

    r := bufio.NewReader(os.Stdin)

    w := bufio.NewWriter(ws)

    for {

        data, err := r.ReadBytes('\n')

        if err != nil {

            panic(err)

        }

        _, err = w.Write(data)

        if err != nil {

            panic(err)

        }

        w.Flush()

        fmt.Printf("My\t> ")

    }

}

func main() {

    fmt.Printf(`Welcome chatroom!

    author: dotcoo zhao

    url: http://www.dotcoo.com/golang-websocket-chatroom

    `)

    origin := "http://127.0.0.1:6611/"      

    url := "ws://127.0.0.1:6611/chatroom"

    ws, err := websocket.Dial(url, "", origin)

    if err != nil {

        panic(err)

    }

    defer ws.Close()

    r := bufio.NewReader(ws)

    //w := bufio.NewWriter(os.Stdout)

    go Command(ws)

    for {

        data, err := r.ReadBytes('\n')

        if err == io.EOF {

            fmt.Printf("disconnected\n")

            os.Exit(0)

        }

        if err != nil {

            panic(err)

        }

        fmt.Printf("\r%sMy\t> ", data)

    }

}

希望本文所述对大家Go语言程序设计有所帮助。

聊天室 websocket golang sprintf