ActionScript 3.0 :: FileReference Download & Redirects In IE

Oct 21, 2009

I have a flash app that uses the FileReference download method to serve up download links. Many of the links come from big content delviry networks and a crossdomain policy file is required to avoid a security error. This all works fine. Except for redirects in IE... in FF redirects work.

A typical Charles log in FF looks like this....

Code:
1) 302: download file temporarily moved
2) 302: download file found
3) 200: download file received OK

[Code].....

....the request for the crossdomain policy file is not being made in IE & thus flash blocks access to the download (client closed connection). The flash throws the traditional 2048 security error - which is what I'd expect if no crossdomain is available. It's worth noting that downloads without a redirect work fine in IE, the crossdomain is requested & received.

As far as I can make out there is no way to force "checkPolicyFile" with FileReference - it doesn't take a LoaderContext object. I'm at a loss of what I can do to resolve this without putting a proxy on our webserver (the backend guru will not allow this as the downloads can be quite large & he thinks will end up being a huge bottleneck).

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