ActionScript 3.0 :: Socket Policy Files Via Port 80?

I'm trying to talk to a fully RESTful api of my own creation. The api is up and running but flash does not support PUT and DELETE, and does not recieve http status codes properly, plus a whole load of other issues with flashes anaemic http support.

To get around this I am trying to use as3httpclientlib. A 3rd party as3 http library, that uses socket connections to access the whole http protocol properly. It's a great library, unfortunately because it uses sockets flash requires implementation of the socket policy file, even though the access is all via port 80, the standard http port.

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This has given me a real headache. I can't implement the port 843 policy server as the documentation suggests because it's out of my ability level i feel. Also when the client is running it may be behind a corporate firewall that doesn't allow 843 access, so serving the policy file via the standard port seems the way forward. This is where I am stuck.

The policy file documentation says this shouldn't matter as if you cant access 843 because of your firewall you'll be unable to access non standard ports anyway, but I am accessing standard ports, only via sockets instead of URLLoader.

In the root of my server I have placed the following policy file:

Code:
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>

[code]....