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A node+express+socket.io development of the chat room source code

Source: Internet
Author: User
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First, download the package:

NPM Install Express

NPM Install Socket.io

To create a file:

Server-side code: Server.js

The code is as follows Copy Code

var http=require ("http");
var express=require ("Express");
var sio=require ("Socket.io");

var app=express ();
App.use (Express.static (__dirname+ "/"));

var server=http.createserver (APP);
App.get ("/", Function (req, res) {
Res.sendfile (__dirname+ "/chart.html");
});
Server.listen (1337, "127.0.0.1", function () {
Console.log ("Start listening");
});
var io=sio.listen (server);
var names=[];
Io.sockets.on ("Connection", function (socket) {
Socket.on ("Login", function (name) {
for (Var i=0;i<names.length;i++) {
if (names[i]==name) {
Socket.emit ("duplicate");
Return
}
}
Names.push (name);
Io.sockets.emit ("Login", name);
Io.sockets.emit ("sendclients", names);
});
Socket.on ("Chat", function (data) {
Io.sockets.emit ("chat", data);
});
Socket.on ("Logout", function (name) {
for (Var i=0;i<names.length;i++) {
if (names[i]==name) {
Names.splice (i,1);
Break
}
}
Socket.broadcast.emit ("logout", name);
Io.sockets.emit ("sendclients", names);
});
});

Static page chart.html:

The code is as follows Copy Code
<! DOCTYPE html>
<meta charset= "UTF-8" >
<title>socket.io Chat Room </title>
<link rel= "stylesheet" href= "Chart.css"/>
<script src= "/socket.io/socket.io.js" ></script>
<script type= "Text/javascript" src= "Chart.js" ></script>
<body onload= "Window_onload ()" >
<div id= "DivContainer1" >
<table class= "Tbdlg" border= "0" cellpadding= "3" cellspacing= "0" width= "100%" >
<tr class= "Trdlg" >
&LT;TD class= "Tddlg" width= "5" >
User name:&nbsp;
<input id= "Tbxusername" type= "text" value= "tourists" size= "/>"
<input id= "Btnlogin" type= "button" value= "Login" onclick= "Btnlogin_onclick ();"/>
<input id= "btnlogout" type= "button" value= "Exit" Disabled onclick= "Btnlogout_onclick ();"/>
</td>
</tr>
</table>
</div>
<div id= "Divleft" >
<div id= "Divchat" ></div>
<div id= "DivContainer3" >
<table class= "Tbdlg" border= "0" cellpadding= "3" cellspacing= "0" width= "100%" >
<tr class= "Trdlg" >
&LT;TD valign= "Top" class= "Tddlg" nowrap> dialogue </td>
&LT;TD valign= "Top" class= "Tddlg" >
<textarea id= "tbxmsg" cols= "255" rows= "5" style= "width:100%" ></textarea>
</td>
&LT;TD valign= "Top" class= "Tddlg" >
<input id= "btnsend" type= button "value=" sends "Disabled onclick=" Btnsend_onclick (); "/>
</td>
</tr>
</table>
</div>
</div>
<div id= "divright" > User list:</div>
</body>

Static CSS file:

The code is as follows Copy Code
h1{
Font-family:arial,helvetica,sans-serif;
Font-weight:bold;
font-size:14pt;
Color: #006bb5;
Background-color: #f0f0f0;
border-radius:5px;
border:1px solid #f0f0f0;
padding:5px;
margin:0 0 18px 0;
}
div[id^=divcontainer]{
border:0;
margin:10px 0;
padding:3px;
Background-color: #f0f0f0;
border-radius:5px;
}
div#divleft{
width:85%;
Background-color: #f0f0f0;
Float:left;
}
div#divright{
width:15%;
Background-color:white;
Float:right;
Font-weight:bold;
font-size:12px;
}
div#divchat{
border:0;
margin:10px 0;
padding:3px;
Background-color: #f0f0f0;
border-radius:5px;
position:relative;
height:300px;
Overflow:auto;
font-size:12px;
}
table.tbdlg{
Font-family:verdana,helvetica,sans-serif;
Font-weight:normal;
font-size:12px;
Background-color: #f0f0f0;
}
Tr.trdlg,td.tddlg {
Background-color: #f0f0f0;
font-size:10px;
}
textarea{
Font-family:inherit;
font-size:10pt;
border:1px solid #444;
Background-color:white;
width:100%;
}
Input[type= "button"]{
Font-family:inherit;
border:1px solid #808080;
border-radius:10px;
margin:1px;
Color:white;
Background-color: #81a0b5;
width:100px;
}
Input[type= "button"]:hover{
margin:1px;
Background-color: #006bb5;
}
Input[type= "button"]:active{
margin:1px;
Font-weight:bold;
Background-color: #006bb5;
}
Input[type= "button"]:focus{
margin:0;
Font-weight:bold;
Background-color: #006bb5;
}

Static JS file

The code is as follows Copy Code

The user name used by the Var username,//user when they log in to the Socket.io chat room
socket,//socket Port Object connected to the chat server
tbxusername,//User Name text box
tbxmsg,//Dialog text Box
Display the message area in the divchat;//page
function Window_onload () {
Divchat=document.getelementbyid ("Divchat");
Tbxusername=document.getelementbyid ("Tbxusername");
Tbxmsg=document.getelementbyid ("tbxmsg");
Tbxusername.focus ();
Tbxusername.select ();
}

function Addmsg (msg) {
divchat.innerhtml+=msg+ "<br>";
if (divchat.scrollheight>divchat.clientheight)
Divchat.scrolltop=divchat.scrollheight-divchat.clientheight;
}
function Btnlogin_onclick () {
if (tbxUsername.value.trim () = = "") {
Alert ("Please enter user name");
Return
}
Username=tbxusername.value.trim ();
Socket=io.connect ();
Socket.on ("Connect", function () {
Addmsg ("Connection to chat server has been established.");
Socket.on ("Login", function (name) {
Addmsg ("Welcome to the user" +name+ "into the chat room.");
});
Socket.on ("Sendclients", function (names) {
var Divright=document.getelementbyid ("Divright");
var str= "";
Names.foreach (function (name) {
str+=name+ "<br/>";
});
divright.innerhtml= "user list <br/>";
DIVRIGHT.INNERHTML+=STR;
});
Socket.on ("Chat", function (data) {
Addmsg (data.user+ "said:" +data.msg);
});
Socket.on ("Disconnect", function () {
Addmsg ("The connection to the chat server is disconnected.");
document.getElementById ("Btnsend"). Diabled=true;
document.getElementById ("Btnlogout"). Disabled=true;
document.getElementById ("Btnlogin"). disabled= "";
var Divright=document.getelementbyid ("Divright");
divright.innerhtml= "User list";
});
Socket.on ("Logout", function (name) {
Addmsg ("User" +name+ "has exited the chat room.")
});
Socket.on ("Duplicate", function () {
Alert ("The user name is already in use.");
document.getElementById ("Btnsend"). Disabled=true;
document.getElementById ("Btnlogout"). Disabled=true;
document.getElementById ("Btnlogin"). disabled= "";
});
});

    socket.on ("Error", function (err) {
        addmsg (" There was an error with the link between the chat server. ");
        socket.disconnect ();
        socket.removealllisteners ("Connect");
        io.sockets={};
   });
    socket.emit ("login", userName);
    document.getElementById ("Btnsend"). disabled= "";
    document.getElementById ("Btnlogout"). disabled= "";
    document.getElementById ("Btnlogin"). Disabled=true;
}

function Btnsend_onclick () {
var Msg=tbxmsg.value;
if (msg.length>0) {
Socket.emit ("chat", {user:username,msg:msg});
Tbxmsg.value= "";
}
}
function Btnlogout_onclick () {
Socket.emit ("logout", userName);
Socket.disconnect ();
Socket.removealllisteners ("Connect");
io.sockets={};
Addmsg ("User" +username+ "Exit chat Room:");
var Divright=document.getelementbyid ("Divright");
divright.innerhtml= "User list";
document.getElementById ("Btnsend"). disabled= "Disabled";
document.getElementById ("Btnlogout"). disabled= "Disabled";
document.getElementById ("Btnlogin"). disabled= "";
}

Final interface

You can open several more browsers for testing. This works better.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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