Post data to JsonP

Question

Is it possible to post data to JsonP? Or does all data have to be passed in the querystring as a GET request?

I have alot of data that I need to send to the service,

Answer 1

There's a (hack) solution I've did it many times, you'll be able to Post with JsonP. (You'll be able to Post Form, bigger than 2000 char than you can use by GET)

Client application Javascript

$.ajax({
  type: "POST", // you request will be a post request
  data: postData, // javascript object with all my params
  url: COMAPIURL, // my backoffice comunication api url
  dataType: "jsonp", // datatype can be json or jsonp
  success: function(result){
    console.dir(result);
  }
});

JAVA:

response.addHeader( "Access-Control-Allow-Origin", "*" ); // open your api to any client 
response.addHeader( "Access-Control-Allow-Methods", "POST" ); // a allow post
response.addHeader( "Access-Control-Max-Age", "1000" ); // time from request to response before timeout

PHP:

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST');
header('Access-Control-Max-Age: 1000');

Doing like this, you are opening your server to any post request, you should re-secure this by providing ident or something else.

With this method, you could also change the request type from jsonp to json, both work, just set the right response content type

jsonp

response.setContentType( "text/javascript; charset=utf-8" );

json

response.setContentType( "application/json; charset=utf-8" );

Please not that you're server will no more respect the SOP (same origin policy), but who cares ?