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 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> <div></div> <div></div> <a href="javascript:;">清屏</a> </div> <div> <button>发送</button> <span><img src="https://www.yxsss.com/ui/sk/t.png" title="表情"><img src="https://www.yxsss.com/ui/sk/e.png" title="上传图片"><form><input type="file" title="上传图片"></form></span> <p><input></p> </div> <div><p></p><p></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="https://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.$$('<p>退出聊天室</p>')); } so.onmessage=function(msg){ eval('var da='+msg.data); var obj=false,c=false; if(da.type=='add'){ var obj=A.$$('<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><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="'https://www.jb51.net/article/+a+'">'; }); //da.code 发信息人的code if(da.code1==mkey){ obj=A.$$('<p><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对我说：'+da.nrong+'</p>'); c=da.code; }else if(da.code==mkey){ if(da.code1!='all') obj=A.$$('<p><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.$$('<p><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对'+users[da.code1].innerHTML+'说：'+da.nrong+'</p>'); c=da.code; } } } if(c){ obj.children[1].onclick=function(){ users[c].onclick(); } } lct.appendChild(obj); lct.scrollTop=Math.max(0,lct.scrollHeight-lct.offsetHeight); } } A.$('sd').onclick=function(){ if(!so){ return st(); } var da=A.$('nrong').value.trim(); if(da==''){ alert('内容不能为空'); return false; } A.$('nrong').value=''; so.send('nr='+esc(da)+'&key='+key); } A.$('nrong').onkeydown=function(e){ var e=e||event; if(e.keyCode==13){ A.$('sd').onclick(); } } function esc(da){ da=da.replace(/</g,'<').replace(/>/g,'>').replace(/\"/g,'"'); return encodeURIComponent(da); } function cuser(t,code){ users[code]=t; t.onclick=function(){ t.parentNode.children.rcss('ck',''); t.rcss('','ck'); key=code; } } A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px'; st(); var bq=A.$('imgbq'),ems=A.$('ems'); var l=80,r=4,c=5,s=0,p=Math.ceil(l/(r*c)); var pt='https://www.jb51.net/article/sk/'; bq.onclick=function(e){ var e=e||event; if(!so){ return st(); } ems.style.display='block'; document.onclick=function(){ gb(); } ct(); try{e.stopPropagation();}catch(o){} } for(var i=0;i<p;i++){ var a=A.$$('<a href="javascript:;" >'+(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.$$('<img src="'https://www.jb51.net/article/+pt+i+'.jpg">'); hh1(a,i); ems.children[0].appendChild(a); } ct(); } function hh1(t,i){ t.onclick=function(e){ var e=e||event; A.$('nrong').value+='{\\'+i+'}'; if(!e.ctrlKey){ gb(); } try{e.stopPropagation();}catch(o){} } } function gb(){ ems.style.display=''; A.$('nrong').focus(); document.onclick=''; } hh(); A.on(window,'resize',function(){ A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px'; ct(); }) var fimg=A.$('upimg'); var img=new Image(); var dw=400,dh=300; A.on(fimg,'change',function(ev){ if(!so){ st(); return false; } if(key=='all'){ alert('由于资源限制 发图只能私聊'); return false; } var f=ev.target.files[0]; if(f.type.match('image.*')){ var r = new FileReader(); r.onload = function(e){ img.setAttribute('src',e.target.result); }; r.readAsDataURL(f); } }); img.onload=function(){ ih=img.height,iw=img.width; if(iw/ih > dw/dh && iw > dw){ ih=ih/iw*dw; iw=dw; }else if(ih > dh){ iw=iw/ih*dh; ih=dh; } var rc = A.$$('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>
后端代码：webserver.php