jmarca / callback_stripper

A small service for Connect to strip the jsonp callback parameter. Handy for using Connect.cache

Callback Stripper

This is a small function to strip query parameters that fit the form callback=blablabla. The idea is to use this after connect-jsonp and before Connect.cache.

A much better solution is to use the {filter:true} parameter option for the connect-jsonp middleware module. But it didn't exist when I wrote this and I thought I'd push it out anyway.

Example use:

var connect = require('connect');
var jsonp = require('connect-jsonp');
var callback_stripper = require('callback_stripper');
server.use("/jsonpservice/"
       ,jsonp()
       ,callback_stripper()   // have to strip the callback param for caching
       ,connect.cache(5000)  // cannot cache if jsonp param is always unique!
       ,some_json_service()
       ,connect.errorHandler()
      );

Installation

$ git clone git://github.com/jmarca/callback_stripper.git
$ cd callback_stripper
$ npm link .

Why the name?

Using callback_striper should make you feel slightly dirty. Any module after this one will not know that query has a callback string in it.

Credit

• Senchalabs for Connect. I mostly modeled this code after the filter module.
• steelThread for the connect-jsonp middleware