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Editorial Team
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Asked: 2026-05-21T07:20:37+00:00

I thought about building a simple API to let users grab some of our

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I thought about building a simple API to let users grab some of our data.

Sooner or later you’ll run into the cross-domain issue if you want to provide json or xml data. I don’t want my users to put some curly proxy.php file on their own machines to solve that problem – so I was wondering – how is Facebook handling this issue?

What’s the magic behind the xd_receiver.htm file (see content below)?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
<script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/XdCommReceiver.js" type="text/javascript"></script>
</body>
</html>

Are there other solution to the x-domain problem? Without switching to JSONP?

thx

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1 Answer

  1. Editorial Team

    This file is simply used by the transport layer when using FIM based transport, but I don’t think they rely on this anymore.

    Either way, if you want to learn more about Cross Domain Messaging, then read this article at ScriptJunkie, then take a look at the easyXDM library, which does everything for you – it even provides RPC.

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