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Index: pi1/class.tx_chcforumfeed_pi1.php
===================================================================
--- pi1/class.tx_chcforumfeed_pi1.php	(revision 1)
+++ pi1/class.tx_chcforumfeed_pi1.php	(working copy)
@@ -76,8 +76,9 @@
 		$entries = '';
 		$i=0;

-		// Remove http://
-		$conf['url'] = str_replace('http://','',$conf['url']);
+		$protocol = ($_SERVER['HTTPS'] == 'on') ? 'https' : 'http';
+		// Remove http:// or https://
+		$conf['url'] = str_replace($protocol . '://','',$conf['url']);
 		// Remove slash at the end
 		if(strrpos($conf['url'],'/')==strlen($conf['url'])-1) {
 			$conf['url'] = substr($conf['url'],0,strlen($conf['url'])-1);
@@ -99,7 +100,7 @@
 			$id = "tag:".$conf['url'].",".date("Y-m-d",$r['crdate']).":".$r['uid'];

 			// Create Link (still anchor and subpage is missing in link)
-			$link = 'http://'.$conf['url'].'/'.htmlspecialchars($this->pi_getPageLink($conf['forum_page_id'],'',array("view" => "single_thread","thread_uid" => $r['thread_id'],"cat_uid" => $r['cat_uid'],"conf_uid" => $r['conf_uid'])));
+			$link = $protocol . '://'.$conf['url'].'/'.htmlspecialchars($this->pi_getPageLink($conf['forum_page_id'],'',array("view" => "single_thread","thread_uid" => $r['thread_id'],"cat_uid" => $r['cat_uid'],"conf_uid" => $r['conf_uid'])));
 			$entries .= '<entry>
 			    <title>'.$r['post_subject'].'</title>
 			    <link href="'.$link.'"/>
@@ -126,7 +127,7 @@

 			  <title>'.$conf['title'].'</title>
 			  <link rel="self" href="'.t3lib_div::locationHeaderUrl(t3lib_div::getIndpEnv(REQUEST_URI)).'" />
-			  <link href="http://'.$conf['url'].'"/>
+			  <link href="'.$protocol.'://'.$conf['url'].'"/>
 			  <updated>'.$updated.'</updated>
 			  <author>
 			    <name>'.$conf['copy'].'</name>