How to add cross domain support to WCF service

Question

I\'m trying to allow POST requests from my javascript app hosted at localhost:80 to a WCF REStful service hosted at a different port, but somehow it doesn\'t work. I\'ve tri

Answer 1

Enabling CORS for non-GET requests requires more than just setting the Access-Control-Allow-Origin header - it also needs to deal with preflight requests, which are OPTIONS requests which ask the server whether it's safe to perform operations which can potentially change data (e.g., POST, PUT, DELETE) before the actual request is sent.

I've written a blog post about adding CORS support for WCF. It's not the simplest of the implementations, but hopefully the code in the post can be simply copied / pasted into your project. The post can be found at http://blogs.msdn.com/b/carlosfigueira/archive/2012/05/15/implementing-cors-support-in-wcf.aspx.