Node.js connect parse json string

function parseJSON1(req,res,next){
    if (req.headers['content-type']=='application/json'){
        //Load all the data
        var readData = '';
        req.on('readable',function(){
            readData += req.read();// w  w  w . j a  v  a 2  s .  co  m
        });

        //Try to parse
        req.on('end',function(){
           try{
               req.body = JSON.parse(readData);
           } catch(e){}
            next();
        });
    }
    else{
        next();
    }
}

var connect = require('connect');

connect()
    .use(parseJSON1)
    .use(function(req,res){
        if(req.body){
            res.end('JSON parsed!, value of foo: ' + req.body.foo);
        }
        else {
            res.end('no JSON detected!');
        }
    })
    .listen(3000);

console.log('server is running on port 3000');