Node.Js : Basic routing with Express

Express framework provide different basic ways to configure routing in our web application. Check out my previous post of how to set up a simple HTTP server with Express and Node.Js if you are new to Node and Express.

Handling HTTP requests with different routs  

1. Handling GET request
   

   
   //respond to a get request on URL "/"
   app.get('/',function(req,res){
    res.send('Hello Express');
   });
   

   
   Here URL can be specified as we want instead of "/". 
   
2. Handling POST request
   

   
   //repond to a post request on URL"/"
   app.post('/',function(req,res){
    res.send('Posted');
   });
   

   
   
   
3. Handling DELETE request
   

   
   //respond to a delete request on URL "/delete_page"
   app.delete('/delete_page',function(req,res){
    res.send('Deleted');
   });
   

   
   
   
4. Handling URLs with wild cards
   

   
   //respond to a get request on URL "/index", "/inbox", "/in123x" os on.
   app.get('/in*x',function(req,res){
       var pathname = url.parse(req.url).path;
       
    res.send('You visited to - '+pathname);
   });
   //respond to get request on any URL except the ones defined earlier
   app.get('*',function(req,res){
    res.send('bad rout');
   });
   

   
   
   
5. Handling parameters with URL
   

   
   //respond to a get request with extra parameters
   app.get('/who/:name?',function(req,res){
   var name=req.params.name;
    res.send('This page about '+name);
   });
   
   app.get('/who/:name?/:title?',function(req,res){
   var name=req.params.name;
   var title=req.params.title;
    res.send('This page about '+name+' title:'+title);
   });

Here is a complete source code for a Node.Js server with above define routes

var express=require('express');
var url = require("url");

var app=express();

//respond to a get request on URL "/"
app.get('/',function(req,res){
 res.send('Hello Express');
});

//repond to a post request on URL"/"
app.post('/',function(req,res){
 res.send('Posted');
});

//respond to a delete request on URL "/delete_page"
app.delete('/delete_page',function(req,res){
 res.send('Deleted');
});

//respond to a get request on URL "/index", "/inbox", "/in123x" os on.
app.get('/in*x',function(req,res){
    var pathname = url.parse(req.url).path;
    
 res.send('You visited to - '+pathname);
});

//respond to a get request with extra parameters
app.get('/who/:name?',function(req,res){
var name=req.params.name;
 res.send('This page about '+name);
});

app.get('/who/:name?/:title?',function(req,res){
var name=req.params.name;
var title=req.params.title;
 res.send('This page about '+name+' title:'+title);
});

app.get('*',function(req,res){
 res.send('bad rout');
});


var server=app.listen(3000,function(){
 console.log('listening');
});

Those basic routing can be used in your node.js application creatively to achieve what you need.