fixing the rel url to abs

1 files changed, 31 insertions, 2 deletions

diff --git a/classes/feeditem/atom.php b/classes/feeditem/atom.php
index 522ca633e..532c599cc 100644
--- a/classes/feeditem/atom.php
+++ b/classes/feeditem/atom.php
@@ -30,7 +30,36 @@ class FeedItem_Atom extends FeedItem_Common {
 			return strtotime($date->nodeValue);
 		}
 	}
-
+	
+	function rel2abs($rel, $base)
+	{
+	    /* return if already absolute URL */
+	    if (parse_url($rel, PHP_URL_SCHEME) != '') return $rel;
+	
+	    /* queries and anchors */
+	    if ($rel[0]=='#' || $rel[0]=='?') return $base.$rel;
+	
+	    /* parse base URL and convert to local variables:
+	       $scheme, $host, $path */
+	    extract(parse_url($base));
+	
+	    /* remove non-directory element from path */
+	    $path = preg_replace('#/[^/]*$#', '', $path);
+	
+	    /* destroy path if relative url points to root */
+	    if ($rel[0] == '/') $path = '';
+	
+	    /* dirty absolute URL */
+	    $abs = "$host$path/$rel";
+	
+	    /* replace '//' or '/./' or '/foo/../' with '/' */
+	    $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
+	    for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
+
+	    /* absolute URL is ready! */
+	    return $scheme.'://'.$abs;
+	}
+	
 	function get_link() {
 		$links = $this->elem->getElementsByTagName("link");
 
@@ -40,7 +69,7 @@ class FeedItem_Atom extends FeedItem_Common {
 					|| $link->getAttribute("rel") == "alternate"
 					|| $link->getAttribute("rel") == "standout")) {
 				$base = $this->xpath->evaluate("string(ancestor-or-self::*[@xml:base][1]/@xml:base)",$link);
-				return $base.$link->getAttribute("href");
+				return $this->rel2abs($link->getAttribute("href"), $base);
 			}
 		}
 	}