最近在公司利用直播间搭建一个图文直播间时正好要用到chatsever，研究了一下html5的websocket 实现了双向通信，根据前人的经验折腾了几天弄了个聊天室，实现了发送图片，发送QQ表情，群聊私聊等功能，特地分享给各位新手参考学习，大牛可以忽略。
前端：client.html
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/>
<title>HTML5 websocket 网页聊天室 javascript php</title>
<style type="text/css">
body,p{margin:0px; padding:0px; font-size:14px; color:#333; font-family:Arial, Helvetica, sans-serif;}
#ltian,.rin{width:98%; margin:5px auto;}
#ltian{border:1px #ccc solid;overflow-y:auto; overflow-x:hidden; position:relative;}
#ct{margin-right:111px; height:100%;overflow-y:auto;overflow-x: hidden;}
#us{width:110px; overflow-y:auto; overflow-x:hidden; float:right; border-left:1px #ccc solid; height:100%; background-color:#F1F1F1;}
#us p{padding:3px 5px; color:#08C; line-height:20px; height:20px; cursor:pointer; overflow:hidden; white-space:nowrap; text-overflow:ellipsis;}
#us p:hover,#us p:active,#us p.ck{background-color:#069; color:#FFF;}
#us p.my:hover,#us p.my:active,#us p.my{color:#333;background-color:transparent;}
button{float:right; width:80px; height:35px; font-size:18px;}
input{width:100%; height:30px; padding:2px; line-height:20px; outline:none; border:solid 1px #CCC;}
.rin p{margin-right:160px;}
.rin span{float:right; padding:6px 5px 0px 5px; position:relative;}
.rin span img{margin:0px 3px; cursor:pointer;}
.rin span form{position:absolute; width:25px; height:25px; overflow:hidden; opacity:0; top:5px; right:5px;}
.rin span input{width:180px; height:25px; margin-left:-160px; cursor:pointer}
#ct p{padding:5px; line-height:20px;}
#ct a{color:#069; cursor:pointer;}
#ct span{color:#999; margin-right:10px;}
.c2{color:#999;}
.c3{background-color:#DBE9EC; padding:5px;}
.qp{position:absolute; font-size:12px; color:#666; top:5px; right:130px; text-decoration:none; color:#069;}
#ems{position:absolute; z-index:5; display:none; top:0px; left:0px; max-width:230px; background-color:#F1F1F1; border:solid 1px #CCC; padding:5px;}
#ems img{width:44px; height:44px; border:solid 1px #FFF; cursor:pointer;}
#ems img:hover,#ems img:active{border-color:#A4B7E3;}
#ems a{color:#069; border-radius:2px; display:inline-block; margin:2px 5px; padding:1px 8px; text-decoration:none; background-color:#D5DFFD;}
#ems a:hover,#ems a:active,#ems a.ck{color:#FFF; background-color:#069;}
.tc{text-align:center; margin-top:5px;}
</style>
</head>
<body>
<div id="ltian">
<div id="us" class="jb"></div>
<div id="ct"></div>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" class="qp" onClick="this.parentNode.children[1].innerHTML=''">清屏</a>
</div>
<div class="rin">
<button id="sd">发送</button>
<span><img src="http://www.yxsss.com/ui/sk/t.png" title="表情" id="imgbq"><img src="http://www.yxsss.com/ui/sk/e.png" title="上传图片"><form><input type="file" title="上传图片" id="upimg"></form></span>
<p><input id="nrong"></p>
</div>
<div id="ems"><p></p><p class="tc"></p></div>
<script>
if(typeof(WebSocket)=='undefined'){
alert('你的浏览器不支持 WebSocket ，推荐使用Google Chrome 或者 Mozilla Firefox');
}
</script>
<script src="http://www.yxsss.com/ui/p/a.js" type="text/javascript"></script>
<script>
(function(){
var key='all',mkey;
var users={};
var url='ws://127.0.0.1:8000';
var so=false,n=false;
var lus=A.$('us'),lct=A.$('ct');
function st(){
var Arr1 = ["聪明的","狡猾的","可爱的","美丽的","狡猾的","善良的","帅气的","逗比的"];
var Arr2 = ["大灰狼","小白兔","母老虎","外星人","皮卡丘","HelloKitty","吴亦凡","薛之谦"];
var ran1 = Math.floor(Math.random() * Arr1.length + 1)-1;
var ran2 = Math.floor(Math.random() * Arr2.length + 1)-1;
var n=Arr1[ran1]+Arr2[ran2];
//以上五行是用来随机生成用户昵称的方法，参考一下 ，如果想自定义用户名可以将以上五行注释，然后以下两行取消注释
//n=prompt('请给自己取一个霸气的名字：');
//n=n.substr(0,16);
//console.log(n);
if(!n){
return ;
}
so=new WebSocket(url);
so.onopen=function(){
if(so.readyState==1){
so.send('type=add&ming='+n);
}
}
so.onclose=function(){
so=false;
lct.appendChild(A.$$('<p class="c2">退出聊天室</p>'));
}
so.onmessage=function(msg){
eval('var da='+msg.data);
var obj=false,c=false;
if(da.type=='add'){
var obj=A.$$('<p>'+da.name+'</p>');
lus.appendChild(obj);
cuser(obj,da.code);
obj=A.$$('<p><span>['+da.time+']</span>欢迎<a>'+da.name+'</a>加入</p>');
c=da.code;
}else if(da.type=='madd'){
mkey=da.code;
da.users.unshift({'code':'all','name':'大家'});
for(var i=0;i<da.users.length;i++){
var obj=A.$$('<p>'+da.users[i].name+'</p>');
lus.appendChild(obj);
if(mkey!=da.users[i].code){
cuser(obj,da.users[i].code);
}else{
obj.className='my';
document.title=da.users[i].name;
}
}
obj=A.$$('<p><span>['+da.time+']</span>欢迎'+da.name+'加入</p>');
users.all.className='ck';
}
if(obj==false){
if(da.type=='rmove'){
var obj=A.$$('<p class="c2"><span>['+da.time+']</span>'+users[da.nrong].innerHTML+'退出聊天室</p>');
lct.appendChild(obj);
users[da.nrong].del();
delete users[da.nrong];
}else{
da.nrong=da.nrong.replace(/{(d+)}/g,function(a,b){
return '<img src="sk/'+b+'.jpg">';
}).replace(/^data:image/png;base64,.{50,}$/i,function(a){
return '<img src="'+a+'">';
});
//da.code 发信息人的code
if(da.code1==mkey){
obj=A.$$('<p class="c3"><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对我说：'+da.nrong+'</p>');
c=da.code;
}else if(da.code==mkey){
if(da.code1!='all')
obj=A.$$('<p class="c3"><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');
else
obj=A.$$('<p><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');
c=da.code1;
}else if(da.code==false){
obj=A.$$('<p><span>['+da.time+']</span>'+da.nrong+'</p>');
}else if(da.code1){
obj=A.$$('<p><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对'+users[da.code1].innerHTML+'说：'+da.nrong+'</p>');
c=da.code;
}
}
}
if(c){
obj.children[1].onclick=function(){
users[c].onclick();
}
}
lct.appendChild(obj);
lct.scrollTop=Math.max(0,lct.scrollHeight-lct.offsetHeight);
}
}
A.$('sd').onclick=function(){
if(!so){
return st();
}
var da=A.$('nrong').value.trim();
if(da==''){
alert('内容不能为空');
return false;
}
A.$('nrong').value='';
so.send('nr='+esc(da)+'&key='+key);
}
A.$('nrong').onkeydown=function(e){
var e=e||event;
if(e.keyCode==13){
A.$('sd').onclick();
}
}
function esc(da){
da=da.replace(/</g,'<').replace(/>/g,'>').replace(/"/g,'"');
return encodeURIComponent(da);
}
function cuser(t,code){
users[code]=t;
t.onclick=function(){
t.parentNode.children.rcss('ck','');
t.rcss('','ck');
key=code;
}
}
A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';
st();
var bq=A.$('imgbq'),ems=A.$('ems');
var l=80,r=4,c=5,s=0,p=Math.ceil(l/(r*c));
var pt='sk/';
bq.onclick=function(e){
var e=e||event;
if(!so){
return st();
}
ems.style.display='block';
document.onclick=function(){
gb();
}
ct();
try{e.stopPropagation();}catch(o){}
}
for(var i=0;i<p;i++){
var a=A.$$('<a href="javascript:;" rel="external nofollow" rel="external nofollow" >'+(i+1)+'</a>');
ems.children[1].appendChild(a);
ef(a,i);
}
ems.children[1].children[0].className='ck';
function ct(){
var wz=bq.weiz();
with(ems.style){
top=wz.y-242+'px';
left=wz.x+bq.offsetWidth-235+'px';
}
}
function ef(t,i){
t.onclick=function(e){
var e=e||event;
s=i*r*c;
ems.children[0].innerHTML='';
hh();
this.parentNode.children.rcss('ck','');
this.rcss('','ck');
try{e.stopPropagation();}catch(o){}
}
}
function hh(){
var z=Math.min(l,s+r*c);
for(var i=s;i<z;i++){
var a=A.$$('<img src="'+pt+i+'.jpg">');
hh1(a,i);
ems.children[0].appendChild(a);
}
ct();
}
function hh1(t,i){
t.onclick=function(e){
var e=e||event;
A.$('nrong').value+='{'+i+'}';
if(!e.ctrlKey){
gb();
}
try{e.stopPropagation();}catch(o){}
}
}
function gb(){
ems.style.display='';
A.$('nrong').focus();
document.onclick='';
}
hh();
A.on(window,'resize',function(){
A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';
ct();
})
var fimg=A.$('upimg');
var img=new Image();
var dw=400,dh=300;
A.on(fimg,'change',function(ev){
if(!so){
st();
return false;
}
if(key=='all'){
alert('由于资源限制 发图只能私聊');
return false;
}
var f=ev.target.files[0];
if(f.type.match('image.*')){
var r = new FileReader();
r.onload = function(e){
img.setAttribute('src',e.target.result);
};
r.readAsDataURL(f);
}
});
img.onload=function(){
ih=img.height,iw=img.width;
if(iw/ih > dw/dh && iw > dw){
ih=ih/iw*dw;
iw=dw;
}else if(ih > dh){
iw=iw/ih*dh;
ih=dh;
}
var rc = A.$$('canvas');
var ct = rc.getContext('2d');
rc.width=iw;
rc.height=ih;
ct.drawImage(img,0,0,iw,ih);
var da=rc.toDataURL();
so.send('nr='+esc(da)+'&key='+key);
}
})();
</script>
</body>
</html>
