crossdomain.conf

# Add this to your nginx.conf under http { }

    server {
        listen 843;
        server_name localhost;
        
        location / {
	    proxy_pass http://127.0.0.1:8843;
            proxy_http_version 1.0 ;
	}

	error_page 400 /;

    }

# create crossserver.py and let it runing under a supervisor process manager with the following source:

#!/usr/bin/python
import SocketServer
class MyTCPHandler(SocketServer.BaseRequestHandler):
    """
    The RequestHandler class for our server.

    It is instantiated once per connection to the server, and must
    override the handle() method to implement communication to the
    client.
    """

    def handle(self):
        self.data = '''<?xml version="1.0"?>
<cross-domain-policy><allow-access-from domain="*" to-ports="*"/></cross-domain-policy>'''
        self.request.sendall(self.data)

if __name__ == "__main__":
    HOST, PORT = "localhost", 8843   
    server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)
    server.serve_forever()