how to support request or response bodies for application/json, application/x-www-form-urlencoded and multipart/form-data in nodejs

actually I am newbie, I want to use express in my web application, So I want support all the requests and response in my application should support

application/json, application/x-www-form-urlencoded and multipart/form-data

express is rather smart, and will automatically determine the header type, you can even use res.send(JSONObj) to send an object directly as JSON. If you want to manually set the header you can do so by using res.setHeader('Content-Type', 'application/json') before you send any data.