Nodejs Learning (2) middleware

varConnect=require (' Connect '), Morgan=require (' Morgan '),//LogBodyparser=require (' Body-parser '), Session=require (' Cookie-sessions '), the users=require ('./users '),//test DataServer=Connect (); Server.use (Morgan (": Method:url:res[content-type]: Response-time"));//Record Request method, URL, response header, and response timeServer.use (bodyparser.urlencoded ({extended:false }));    Server.use (Bodyparser.json ()); Server.use (Session ({secret:' My app secret '})); Server.use (function(Req,res,next) {//If you are logged on        if('/' ==req.url &&session.logged_in) {Res.writehead (200,{"Content-type": "Text/html"}); Res.end ("Welcome back,<b>" +session["username"]+ ' </b>. ' + ' <a href= '/logout ' >logout</a> '); }Else{next ();    }    }); Server.use (function(Req,res,next) {//Show form when not logged on        if("/" ==req.url && req.method== "GET") {Res.writehead (200,{"Content-type": "Text/html"}); Res.end ([' <form action= '/login "method=" POST ">",                ' <fieldset> ',                ' <legend>please log in</legend> ',                ' <p>user:<input type= ' text ' name= ' User ' ></p> ',                ' <p>password:<input type= ' Password "name=" Password "></p>",                ' <button>Submit</button> ',                ' </fieldset> ',                ' </form> '].join (‘‘)); }Else{next ();    }    }); Server.use (function(Req,res,next) {//Login Successful        if("/login" ==req.url && "POST" = =Req.method) {Res.writehead (200); if(!users[req.body.user] | | users[req.body.user].password!==Req.body.password) {Res.end (' Bad Username/password '); }Else{session.logged_in=true; Session.username=users[req.body.user]["Name"]; Res.end ("Authenticated"); }        }Else{next ();    }    }); Server.use (function(Req,res,next) {//Log Out        if("/logout" = =Req.url) {session.logged_in=false; Res.writehead (200); Res.end (' Logged out '); }Else{next (); }}) Server.listen (3000);

Users.json

{    "Tobi": {        "password": "Ferret",        "name": "Tobi Holowaychuk"    }} 

Nodejs Learning (2) middleware