Custom Server-sent Events Chat Server

1 //Anonymous Chat Server2 //post a new message to the/chat address, or get the text or event stream from a URL in get form3 //Create a GET request to "/" to return a simple HTML file that includes the client chat UI4 5 varHTTP = require (' http ');6 7 //HTML files used by chat clients8 varClientui = require (' FS '). Readfilesync ("chatclient.html");9 varemulation = require (' FS '). Readfilesync ("Eventsourceemulation.js");Ten  One //an array of Serverresponse objects to receive the sent events A varClients = []; -  - //send a comment to the client every 20 seconds theSetInterval (function(){ -Clients.foreach (function(client) {Client.write (":p ing?n"))}); -}, 20000); -  + //Create a new server - varServer =Newhttp. Server (); +  A //when the server gets to a new request, run the callback function atServer.on ("Request",function(Request, response) { -     //URL to parse request -     varurl = require (' URL ')). Parse (request.url); -      -     //if "/", the server sends the client chat room UI -     if(Url.pathname = = = "/"){ inResponse.writehead ($, {"Content-type": "Text/html"}); -Response.Write ("<script>" +emulation + "</script>"); to Response.Write (clientui); + Response.End (); -         return; the     } *     //if it is an address other than "/chat", it returns 404 $     Else if(Url.pathname!== "/chat"){Panax NotoginsengResponse.writehead (404); - Response.End (); the         return; +     } A      the     //If the request type is post, then a client sends a new message +     if(Request.method = = = "POST"){ -Request.setencoding ("UTF8"); $         varBODY = ""; $         //after the data has been fetched, it is added to the request body -Request.on ("Data",function(Chunk) {Body + =Chunk;}); -  the         //send an empty response when the request is complete -Request.on ("End",function(){WuyiResponse.writehead (200); the Response.End (); -  Wumessage = ' data: ' +body.replace (' \ n ', ' \ndata: ') + ' \r\n\r\n '; -  AboutClients.foreach (function(client) {client.write (message);}); $  -          }); -     } -     //a client requests a set of messages A     Else { +Response.writehead ($, {"Content-type": "Text/event-stream"}); theResponse.Write ("data:connected\n\n"); -  $Request.connection.on ("End",function(){ theClients.splice (Clients.indexof (response), 1); the Response.End (); the         }); the  -         //write down the response object in Clients.push (response); the     } the      About }); the  the //Start the server the  +Server.listen (8000); -  the  

Custom Server-sent Events Chat Server