websocket 类也是在网上找到的。 修改后可以用来创建多房间聊天室。可以发送图片表情，图片，及文字。

分享的代码，已经测试。可正常运行

HTML 端代码

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="utf-8" />

    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>

    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"/>

    <title>直播课程</title>

    <link rel="stylesheet" href="css/base.css">

    <link rel="stylesheet" href="css/zhibo.css">

    <script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>

</head>

<body class="scope">

    <div style="width: 100%; height:250px;">

        <script type="text/javascript" src="player/sewise.player.min.js"></script>

        <script type="text/javascript">

        var videourl='视屏播放地址不用写';

            SewisePlayer.setup({

                server: "vod",

                type: "m3u8",

                autostart: "true",

                videourl: videourl,

                    skin: "vodWhite",

                    title: "三年级预备课程一",

                    claritybutton: "disable",

                    lang: "zh_CN"

            });

        </script>

    </div>

    <div class="log  comment" id="log">

          <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">我是用户1我是用是用户1我是用户1我是用户1我是用户1</span></div>

          </div>

             <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">莫寒</span>：<span class="yuanwang"><img class="chat_pic" src="img/pic.jpg" alt=""></span></div>

             </div>

             <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">我是用户1我是用是用户1我是用户1我是用户1我是用户1</span></div>

          </div>

             <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">我是用户1我是用是用户1我是用户1我是用户1我是用户1</span></div>

          </div>

             <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">莫寒</span>：<span class="yuanwang"><img class="chat_pic" src="img/150599173575244039.jpg" alt=""></span></div>

             </div>

              <div class="luck">

                      <div class="user"><img src="img/user.png"></div>

                      <div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">我是用户1我是用是用户1我是用户1我是用户1我是用户1</span></div>

          </div>

    </div>

    <div class="sendCon">

        <p class="info">

            <span class="emoji"> <input type="button" value="：)"></span>

            <span class="placeholder"><img  src="img/pic.jpg" alt=""><input type="file" id="file_img" onchange="preImg(this.id,'yulan_img')"></span>

            <span class="text"><input type="text" id="text" placeholder=""></span>

            <span class="send"><input type="button" class="btn" value="发送" onclick="sendText()"></span>

        </p>

        <ul class="emojiCon"></ul>

    </div>

<script>

    var serverUrl="http://192.168.3.240";  //图片服务器的地址ip

    var url="ws://你自已访问的ip:端口(8000)";

    function link(){

        socket=new WebSocket(url);

        socket.onopen=function(){

            // alert('连接成功')

        };

        socket.onerror=function(errorEvent){

            // alert('error');

        }

        socket.onmessage=function(msg){

            setMsg(msg.data);

            console.log(msg);

        }

        // socket.onclose=function(){setMsg('断开连接')}

    }

    function closeScoket(){

        socket.close();

        socket=null;

    }

    //向页面中实时更新消息数据

    function setMsg(var1){

        var obj=JSON.parse(var1);

        if(obj.type==1){

            $('.log').append('<div class="luck">'

                      +'<div class="user"><img src="img/user.png"></div>'

                      +'<div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">'+obj.msg+'</span></div></div>' );

            add();

        }else{

            var img = new Image();

            img.src=obj.msg;

            img.onload=function(){

                var isPic='';

                //width>30 表示不是表情包图片

                if(img.width>30){

                    isPic='<img class="chat_pic" src="'+obj.msg+'" alt="">';

                }else{

                    isPic='<img class="chat_pic1" src="'+obj.msg+'" alt="">'

                }

                $('.log').append('<div class="luck">'

                              +'<div class="user"><img src="img/user.png"></div>'

                              +'<div class="content1"><span class="luckyP">奕佚奕佚</span>：<span class="yuanwang">'+isPic+'</span></div></div>' );

                add();

            }

        }

    }

    var arr=[1,2,3,4];

    //发送文字

    function sendText(id){

        var json;

        if($('#'+id).attr('src')==undefined){

            json=JSON.stringify({'room':arr[1],'type':'1','msg':$('#text').val()});

            if($('#text').val()==""){

                $('body').append(pop("消息不能为空"));

                return;

            }

        }else{

            json=JSON.stringify({'room':arr[1],'type':'2','msg':$('#'+id).attr('src')});

            $('.emojiCon').css('display','none');

        }

        socket.send(json);

        $('#text').val('');

    }

    //发送图片

    function sendPic(){

        $.ajax({

            url:''+serverUrl+'/test/Home/index/base64_decode',

            type:'post',

            data:{'msg':$('#yulan_img').attr('src')},

            dataType:'html',

            success:function(data){

                console.log(data);

                var json=JSON.stringify({'room':arr[3],'type':'2','msg':data});

                socket.send(json);

                $('.mask').remove();

            },

            error:function(event){

                $('body').append(pop('服务器开小差啦~'))

            }

        })

    }

    //让讨论区的滚动条始终在底部 让用户立马看到自己的消息

    function add(){

        var div = document.getElementById('log');

        div.scrollTop = div.scrollHeight;

    }

    //加载表情包

    function  afterLoad(){

        var html='';

        for(var i=0;i<91;i++){

            html+='<li><img id="emoji_'+(i+1)+'" onclick="sendText(id)" src="'+serverUrl+'/test/Public/img/qq/'+(i+1)+'.gif" alt=""></li>';

        }

        $('.emojiCon').html(html);

    }

    //图片预览

    function preImg(sourceId, targetId) {

            if (typeof FileReader === 'undefined') {

                alert('Your browser does not support FileReader...');

                return;

            }

            var reader = new FileReader();  

            reader.onload = function(e) {

                var img = document.getElementById(targetId);

                img.src = this.result;

                var w=img.width;

                var h=img.height;

                var winW=$(window).width();

                var winH=$(window).height();

                var marginTop=parseInt((winH-40-h)/2);

                var marginLeft=parseInt((winW-w

                    )/2);

                if(w/h>1.2){

                    $(img).css('width',winW).css('margin-top',marginTop);

                    alert("marginTop:"+marginTop);

                }else if(h/w>2){//超长图的时候 滚动条显示

                    $('.over_pic').css('height',winH-40).css('overflow','scroll');

                    $(img).css('width',winW);

                }else{//竖图的时候

                    $(img).css('height',winH-40).css('margin-left',marginLeft);

                    alert("marginLeft:"+marginLeft);

                }

            }

            reader.readAsDataURL(document.getElementById(sourceId).files[0]);  

            $('body').append('<div class="mask scope"><div class="over_pic"><img id="yulan_img" src="" alt=""></div>'

                +'<p><button class="sure" onclick="sendPic()">确认</button></p></div>');

    }  

    $(function(){

        link();

        afterLoad();

        add();

        $('.log').css('height',$(window).height()*0.65+'px');

        $('.emoji').click(function(){

            $('.emojiCon').show();

        })

    })

</script> 

</body>

</html>

CSS 前端代码  bass

@charset "utf-8";

/* 禁用iPhone中Safari的字号自动调整 */

html {

    -webkit-text-size-adjust: 100%;

    -ms-text-size-adjust: 100%;

    font-family:"微软雅黑",Arial,sans-serif;

}

/* 去除iPhone中默认的input样式 */

input{/* -webkit-appearance:none; */ resize: none;}

/* 取消链接高亮  */

body,div,ul,li,ol,h1,h2,h3,h4,h5,h6,input,textarea,select,p,dl,dt,dd,a,img,button,form,table,th,tr,td,tbody,article,

aside, details,figcaption,figure,footer,header,hgroup, menu,nav,section{

  -webkit-tap-highlight-color:rgba(0, 0, 0, 0);

}

/* 设置HTML5元素为块 */

article, aside, details,figcaption,figure,footer,header,hgroup, menu,nav,section {

    display: block;

}

/* 图片自适应 */

img {width: 100%;height: auto;width:auto\9; /* ie8 */

    -ms-interpolation-mode:bicubic;/*为了照顾ie图片缩放失真*/}

*:focus {outline:none;}

/* 清零 */

body,div,ul,li,ol,h1,h2,h3,h4,h5,h6,input,textarea,select,p,dl,dt,dd,

a,img,button,form,table,th,tr,td,tbody,article,

aside, details,figcaption,figure,footer,header,hgroup, menu,nav,section

    {

        margin:;

        padding:;

        border:none;

    }

em,i{font-style:normal;}

strong{font-weight: normal;}

.clearfix:after{content:""; display:block; visibility:hidden; height:; clear:both;}

.clearfix{zoom:;}

a{text-decoration:none; color:#969696;}

a:hover{ text-decoration:none;}

ul,ol,li{list-style:none;}

fieldset,img{border: none;}

q:before,q:after {content:"";}

input:password {ime-mode:disabled;}

*{box-sizing:border-box;}

.scope{min-width:320px; max-width:750px; margin: 0 auto;}

*{

    margin:;

    padding:;

}

@media screen  and (max-width: 750px){

    html{font-size:30px;}

}

@media screen and (min-width:640px) and (max-width:749px){

    html{font-size:25px; }

}

@media screen and (min-width:480px) and (max-width:639px){

    html{font-size:20px; }

}

@media screen and (min-width:320px) and (max-width:479px){

    html{font-size:15px; }

}

/*body{font-size:62.5%;}*/

fieldset,img{border:}

a{text-decoration:none;color:#000;outline:none}

li{list-style:none}

h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}

input,button,textarea,select,optgroup,option{

    font-family:inherit;font-size:inherit;

    font-style:inherit;font-weight:inherit}

input,button,textarea,select{*font-size:100%}

.clear:after{

  display:block;

  content:"clear";

  height:;

  clear:both;

  visibility:hidden;

}

.clear{zoom:;}

CSS 前端代码  zhibo

.comment{

    overflow: scroll;

    border:1px solid red;

    padding:2%;

}

.luck{

    padding: 10px 0 0 0;

    overflow:hidden;

}

.luckyP{

    color:#44c6dd;

}

.chat_pic{

    width:40%;

    display:inline-block;

    vertical-align: top;

}

.chat_pic1{

    width:10%;

    vertical-align: middle;

}

.user img{

    width:40%;

}

.user,.content1{

    float:left;

}

.user{

    width:15%;

    text-align: center;

    vertical-align: middle;

}

.content1{

    width:85%;

    line-height:25px;

}

.sendCon{

    position:fixed;

    bottom:;

    left:;

    right:;

    padding:2%;

    background:#fff;

    border:1px solid #ddd;

    min-width:320px;

    max-width:750px;

    margin:0 auto;

}

.info span{

    display:inline-block;

}

.placeholder{

    width:15%;

    position:relative;

    text-align: center;

    vertical-align: middle;

}

    input[type="file"]{

        width:80%;

        position:absolute;

        left:2%;

        top:2%;

        opacity:;

    }

    .placeholder img{

        width:65%;

    }

.emoji{

    width:10%;

    text-align: center;

    /*vertical-align: middle;*/

    /*border:1px solid red;*/

}

    .emoji input{

        width:100%;

        padding:8% 2%;

        border:1px solid #ddd;

        background:#fff;

    }

    /*.emoji img{

        width:80%;

        border:1px solid blue;

        vertical-align: middle;

    }*/

.text{

    width:55%;

}

    #text{

        width:100%;

        border:1px solid #ddd;

        padding:2%;

    }

.send{

    width:15%;

}

    .btn{

        width:100%;

        background:#86e2fd;

        color:#fff;

        padding:9% 2%;

        vertical-align: middle;

    }

.mask{

    background:rgba(0,0,0,0.9);

    width:100%;

    height:100%;

    position:fixed;

    left:;

    top:;

    /*display:none;*/

}

.sure{

    background:#19ad17;

    color:#fff;

    padding:10px;

}

.mask p{

    text-align: right;

    position:absolute;

    bottom:;

    left:;

    right:;

    height:40px;

    vertical-align: middle;

}

.over_pic img{

    display:block;

}

/*表情包div*/

.emojiCon{

    position:absolute;

    bottom:;

    left:;

    display:none;

    background:#fff;

}

.emojiCon li{

    border:1px solid #ddd;

    float:left;

    width:8.33%;

}

php  服务端代码 server.php

<?php

    include 'websocket.class.php';

    $config=array(

    'address'=>'你自已ip地址',  //注意事 项 linux下云服务器，用ifconfig 查看自已的内网ip  外网访问的ip 是用写在html那块的

    'port'=>'8000',

    'event'=>'WSevent',//回调函数的函数名

    'log'=>true,

    );

    $websocket = new websocket($config);

    $websocket->run();

function WSevent($type,$event){

  global $websocket;

    if('in'==$type){

      $websocket->log('客户进入id:'.$event['k']);

    }elseif('out'==$type){

      $websocket->log('客户退出id:'.$event['k']);

    }elseif('msg'==$type){

      $websocket->log($event['k'].'消息:'.$event['msg']);

      roboot($event['sign'],$event['msg']);

    }

}

function roboot($sign,$t){

global $websocket;

    $msg_arr = json_decode($t,true);

    foreach($websocket->users as $k =>&$v){

        if(empty($v['room'])){

            $v['room']=$msg_arr['room'];

        }

        if($v['room'] ==$msg_arr['room']){

             $websocket->idwrite($k,$t);

        }

    }

}

php 服务羰代码  websocket.class.php

<?php

/*

创建类websocket($config);

$config结构:

$config=array(

  'address'=>'192.168.0.200',//绑定地址

  'port'=>'8000',//绑定端口

  'event'=>'WSevent',//回调函数的函数名

  'log'=>true,//命令行显示记录

);

回调函数返回数据格式

function WSevent($type,$event)

$type字符串 事件类型有以下三种

in  客户端进入

out 客户端断开

msg 客户端消息到达

均为小写

$event 数组

$event['k']内置用户列表的userid;

$event['sign']客户标示

$event['msg']收到的消息 $type='msg'时才有该信息

方法:

run()运行

search(标示)遍历取得该标示的id

close(标示)断开连接

write(标示,信息)推送信息

idwrite(id,信息)推送信息

属性:

$users 客户列表

结构:

$users=array(

[用户id]=>array('socket'=>[标示],'hand'=[是否握手-布尔值]),

[用户id]=>arr.....

)

*/

class websocket{

    public $log;

    public $event;

    public $signets;

    public $users;

    public $master;

    public function __construct($config){

        if (substr(php_sapi_name(), 0, 3) !== 'cli') {

            die("请通过命令行模式运行!");

        }

        error_reporting(E_ALL);

        set_time_limit(0);

        ob_implicit_flush();

        $this->event = $config['event'];

        $this->log = $config['log'];

        $this->master=$this->WebSocket($config['address'], $config['port']);

        $this->sockets=array('s'=>$this->master);

    }

    function WebSocket($address,$port){

         $server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

        socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);

        socket_bind($server, $address, $port);

        socket_listen($server);

        $this->log('开始监听: '.$address.' : '.$port);

        return $server;

    }

  function run(){

    while(true){

      $changes=$this->sockets;

      @socket_select($changes,$write=NULL,$except=NULL,NULL);

      foreach($changes as $sign){

        if($sign==$this->master){

          $client=socket_accept($this->master);

          $this->sockets[]=$client;

          $user = array(

            'socket'=>$client,

            'hand'=>false,

          );

          $this->users[] = $user;

          $k=$this->search($client);

          $eventreturn = array('k'=>$k,'sign'=>$sign);

          $this->eventoutput('in',$eventreturn);

        }else{

          $len=socket_recv($sign,$buffer,2048,0);

          $k=$this->search($sign);

          $user=$this->users[$k];

          if($len<7){

            $this->close($sign);

            $eventreturn = array('k'=>$k,'sign'=>$sign);

            $this->eventoutput('out',$eventreturn);

            continue;

          }

          if(!$this->users[$k]['hand']){//没有握手进行握手

            $this->handshake($k,$buffer);

          }else{

            $buffer = $this->uncode($buffer);

            $eventreturn = array('k'=>$k,'sign'=>$sign,'msg'=>$buffer);

            $this->eventoutput('msg',$eventreturn);

          }

        }

      }

    }

  }

  function search($sign){//通过标示遍历获取id

    foreach ($this->users as $k=>$v){

      if($sign==$v['socket'])

      return $k;

    }

    return false;

  }

  function close($sign){//通过标示断开连接

    $k=array_search($sign, $this->sockets);

    socket_close($sign);

    unset($this->sockets[$k]);

    unset($this->users[$k]);

  }

  function handshake($k,$buffer){

    $buf  = substr($buffer,strpos($buffer,'Sec-WebSocket-Key:')+18);

    $key  = trim(substr($buf,0,strpos($buf,"\r\n")));

    $new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));

    $new_message = "HTTP/1.1 101 Switching Protocols\r\n";

    $new_message .= "Upgrade: websocket\r\n";

    $new_message .= "Sec-WebSocket-Version: 13\r\n";

    $new_message .= "Connection: Upgrade\r\n";

    $new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";

    socket_write($this->users[$k]['socket'],$new_message,strlen($new_message));

    $this->users[$k]['hand']=true;

    return true;

  }

  function uncode($str){

    $mask = array();

    $data = '';

    $msg = unpack('H*',$str);

    $head = substr($msg[1],0,2);

    if (hexdec($head{1}) === 8) {

      $data = false;

    }else if (hexdec($head{1}) === 1){

      $mask[] = hexdec(substr($msg[1],4,2));

      $mask[] = hexdec(substr($msg[1],6,2));

      $mask[] = hexdec(substr($msg[1],8,2));

      $mask[] = hexdec(substr($msg[1],10,2));

      $s = 12;

      $e = strlen($msg[1])-2;

      $n = 0;

      for ($i=$s; $i<= $e; $i+= 2) {

        $data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2)));

        $n++;

      }

    }

    return $data;

  }

    function code($msg){

      $msg = preg_replace(array('/\r$/','/\n$/','/\r\n$/',), '', $msg);

      $frame = array();

      $frame[0] = '81';

      $len = strlen($msg);

      $frame[1] = $len<16?'0'.dechex($len):dechex($len);

      $frame[2] = $this->ord_hex($msg);

      $data = implode('',$frame);

      return pack("H*", $data);

    }

    function ord_hex($data)  {

      $msg = '';

      $l = strlen($data);

      for ($i= 0; $i<$l; $i++) {

        $msg .= dechex(ord($data{$i}));

      }

      return $msg;

    }

    function idwrite($id,$t){//通过id推送信息

      if(!$this->users[$id]['socket']){return false;}//没有这个标示

      $t=$this->code($t);

      return socket_write($this->users[$id]['socket'],$t,strlen($t));

    }

    function write($k,$t){//通过标示推送信息

      $t=$this->code($t);

      return socket_write($k,$t,strlen($t));

    }

    function eventoutput($type,$event){//事件回调

      call_user_func($this->event,$type,$event);

    }

    function log($t){//控制台输出

      if($this->log){

        $t=$t."\r\n";

        fwrite(STDOUT, iconv('utf-8','gbk//IGNORE',$t));

      }

    }

}

php 上传图片异步处理代码

$update_path = "Upload/";

        $msg = $_POST['msg'];

        $exe = str_replace('/', '.', strstr(strstr($msg, ';', TRUE), '/'));

        $exe = $exe == '.jpeg' ? '.jpg' : $exe;

        $tmp = base64_decode(substr(strstr($msg, ','), 1));

        $path = $update_path . md5(time()) . $exe;

        $res  =file_put_contents($path, $tmp);

        echo "http://".$_SERVER['SERVER_NAME']."/test/".$path;

window 下  打开dos 命令  找到php.exe 文件位置。用php.exe 执行 server.php 文件开启服务器监听。   php.exe   server.php

打开html页面，点击链接，就可以链接websocket了。提示成功，便可以发送信息了。

注意事项目：linux 下 滥听端口时，注意服务器防火墙是否开启端口过滤。 Linux  有iptables firewall 两个防火墙软件件

websocket 多聊天室功能的更多相关文章

  1. PHP 之websocket实现聊天室功能

    一.功能界面 具体的详细代码:https://github.com/yangsphp/websocket-master/tree/master 二.具体代码实现 1.前端代码如下 <!DOCTY ...

  2. 基于WebSocket实现聊天室(Node)

    基于WebSocket实现聊天室(Node) WebSocket是基于TCP的长连接通信协议,服务端可以主动向前端传递数据,相比比AJAX轮询服务器,WebSocket采用监听的方式,减轻了服务器压力 ...

  3. Ext JS学习第十六天 事件机制event（一） DotNet进阶系列(持续更新) 第一节：.Net版基于WebSocket的聊天室样例 第十五节：深入理解async和await的作用及各种适用场景和用法 第十五节：深入理解async和await的作用及各种适用场景和用法 前端自动化准备和详细配置(NVM、NPM/CNPM、NodeJs、NRM、WebPack、Gulp/Grunt、G

    code&monkey   Ext JS学习第十六天 事件机制event(一) 此文用来记录学习笔记: 休息了好几天,从今天开始继续保持更新,鞭策自己学习 今天我们来说一说什么是事件,对于事件 ...

  4. 关于websocket制作聊天室的的一些总结

    websocket的总结 在一个聊天室系统中,常常使用websocket作为通信的主要方式.参考地址:https://www.jianshu.com/p/00e... 关于自己的看法:websocke ...

  5. Netty学习笔记(四) 简单的聊天室功能之服务端开发

    前面三个章节,我们使用了Netty实现了DISCARD丢弃服务和回复以及自定义编码解码,这篇博客,我们要用Netty实现简单的聊天室功能. Ps: 突然想起来大学里面有个课程实训,给予UDP还是TCP ...

  6. 使用epoll实现聊天室功能，同时比较epoll和select的异同

    1.首先介绍一下select和epoll的异同,如下(摘抄自https://www.cnblogs.com/Anker/p/3265058.html) select的几大缺点: (1)每次调用sele ...

  7. websocket+golang聊天室

    原文地址: http://www.niu12.com/article/3 websocket+golang聊天室 main.go和index.html放在同一目录下 main.go package m ...

  8. [Python] socket发送UDP广播实现聊天室功能

    一.说明 本文主要使用socket.socket发送UDP广播来实现聊天室功能. 重点难点:理解UDP通讯流程.多线程.UDP广播收发等. 测试环境:Win10\Python3.5. 程序基本流程:创 ...

  9. WebSocket 网页聊天室

    先给大家开一个原始的websocket的连接使用范例 <?php /* * recv是从套接口接收数据,也就是拿过来,但是不知道是什么 * read是读取拿过来的数据,就是要知道recv过来的是 ...

随机推荐

  1. Python之滑动窗口

    需求 对于一个数组array = ["n","v","l","f",...,"y","c& ...

  2. mkvirtualenv管理python版本

    centos7安装pip 安装pip yum -y install epel-release yum -y install python2-pip 安装virtualenvwrapper pip in ...

  3. 那些年踩过的坑之Redis报错:All sentinels down, cannot determine where is mymaster master is running...

    1. 异常信息: All sentinels down, cannot determine where is mymaster master is running... 通过测试: @Test pub ...

  4. CSP考试策略

    准备 带好手表,身份证,准考证,文具,和矿泉水(热水). 考试之前 如果时间比较充足,可以重启测试保护是否解开. 调整显示屏亮度,检查键盘.鼠标. 关掉拓展名隐藏. 写个简单程序测试是否有异常,测试对 ...

  5. day33 网络编程之UDP与进程了解

    UDP 什么是UDP协议 在上节课的练习中,使用TCP进行网络编程时,我们会遇到粘包问题,这是因为TCP是流式协议,而今天学习的UDP协议不是流式协议,其发送的数据是数据报格式的,在进行数据发送时该协 ...

  6. makefile中=、：=和+=的区别

    经常有人分不清= .:=和+=的区别  这里我总结下做下详细的分析: 首先你得清楚makefile的运行环境,因为我是linux系统,那么我得运行环境是shell 在Linux的shell里,shel ...

  7. 怎么将本地项目放到码云(gitee)上面？图文详解

    git的好处什么的,在此就不多赘述.现在很多公司都在用git了. 那么怎么将本地已经有的项目放到码云(gitee)上呢? 前置条件说明: 1:原来项目所在位置:D:\workspace01\class ...

  8. GCD and LCM HDU - 4497（质因数分解）

    Problem Description Given two positive integers G and L, could you tell me how many solutions of (x, ...

  9. Vue.js学习笔记-script标签在head和body的区别

    初学JavaScript,项目需要没有系统学习,只能边查资料边码代码,埋下的坑不知道有多少,还是建议时间充足的情况下系统的将Javascript学习一遍 ,涉及的HTML知识也务必了解. 问题 最开始 ...

  10. Python安装及环境变量

    针对windows操作系统 1.下载安装包,python官网下载(https://www.python.org/) python3.7.4:下载https://www.python.org/downl ...