Gather all the Facebook stuff together in one place

plugins/Facebook/FBC_XDReceiver.php

@@ -0,0 +1,68 @@
+<?php
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+    exit(1);
+}
+
+/*
+ * Generates the cross domain communication channel file
+ * (xd_receiver.html). By generating it we can add some caching
+ * instructions.
+ *
+ * See: http://wiki.developers.facebook.com/index.php/Cross_Domain_Communication_Channel
+ */
+class FBC_XDReceiverAction extends Action
+{
+
+    /**
+     * Do we need to write to the database?
+     *
+     * @return boolean true
+     */
+
+    function isReadonly()
+    {
+        return true;
+    }
+
+    /**
+     * Handle a request
+     *
+     * @param array $args Arguments from $_REQUEST
+     *
+     * @return void
+     */
+
+    function handle($args)
+    {
+        // Parent handling, including cache check
+        parent::handle($args);
+        $this->showPage();
+    }
+
+    function showPage()
+    {
+        // cache the xd_receiver
+        header('Cache-Control: max-age=225065900');
+        header('Expires:');
+        header('Pragma:');
+
+        $this->startXML('html');
+
+        $language = $this->getLanguage();
+
+        $this->elementStart('html', array('xmlns' => 'http://www.w3.org/1999/xhtml',
+                                          'xml:lang' => $language,
+                                          'lang' => $language));
+        $this->elementStart('head');
+        $this->element('title', null, 'cross domain receiver page');
+        $this->script('http://static.ak.connect.facebook.com/js/api_lib/v0.4/XdCommReceiver.debug.js');
+        $this->elementEnd('head');
+        $this->elementStart('body');
+        $this->elementEnd('body');
+
+        $this->elementEnd('html');
+    }
+
+}
+