Tastypie resource base class that allows for cross domain requests by adding CORS headers. - Handles all responses from the resource even ImmediateHttpResponse exceptions.

cors_resource.py

from tastypie.resources import Resource
from tastypie.exceptions import ImmediateHttpResponse
from django.http import HttpResponse
 
 
class CorsResource(Resource):
 
    """ adds CORS headers for cross-domain requests """
 
    def patch_response(self, response):
 
        allowed_headers = ['Content-Type', 'Authorization']
 
        response['Access-Control-Allow-Origin'] = '*'
        response['Access-Control-Allow-Headers'] = ','.join(allowed_headers)
        return response
 
    def wrap_view(self, view):
        """ calls view and patches resonse headers
            or
            catches ImmediateHttpResponse, patches headers and re-raises
        """

        # first do what the original wrap_view wanted to do
        wrapper = super(CorsResource, self).wrap_view(view)

        # now wrap that to patch the headers
        def wrapper2(*args, **kwargs):
            try:
                response = wrapper(*args, **kwargs)
                return self.patch_response(response)
            except ImmediateHttpResponse, exception:
                response = self.patch_response(exception.response)
                print 'caught and patched'
                # re-raise - we could return a response but then anthing wrapping
                # this and expecting an exception would be confused
                raise ImmediateHttpResponse(response)

        return wrapper2
 
    def method_check(self, request, allowed=None):
        """ Handle OPTIONS requests """
        if request.method.upper() == 'OPTIONS':
 
            if allowed is None:
                allowed = []
 
            allows = ','.join(allowed).upper()
 
            response = HttpResponse(allows)
            response['Allow'] = allows
            raise ImmediateHttpResponse(response=response)
 
        return super(CorsResource, self).method_check(request, allowed)