asp.net mvc - Annoying Error #2048: Security sandbox violation from localhost

Question

This is my crossdomain.xml that I put in the same folder of my Web.config:

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
    <site-control permitted-cross-domain-policies="all"/>
    <allow-access-from domain="*" secure="false" />
    <allow-http-request-headers-from domain="*" headers="*" />
</cross-domain-policy>

Although I can load using Security.loadPolicyFile("http://localhost:52090/crossdomain.xml").

When my swf try to comunicate with my local site (asp.net mvc) it says:

Error #2048: Security sandbox violation: http:/ /localhost:52090/Content/Swf/MyApp.swf cannot load data from localhost:52090

How do I solve that?

Answer 1

Since you use as3httpclientlib that based on Socket, rather than URLLoader you should setup socket policy server instead of http one (so your crossdomain.xml isn't used by flash in this case).

To setup flash policy server you can use perl script from this article http://www.adobe.com/devnet/flashplayer/articles/socket_policy_files.html with policy xml suggested by @Bart Friederichs (with to-ports attribute)