svn commit: r747098 - /incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php

[ch...@apache.org]

Author: chabotc
Date: Mon Feb 23 18:29:45 2009
New Revision: 747098

URL: http://svn.apache.org/viewvc?rev=747098&view=rev
Log:
This implements a very simple style rewriter, it works but i still have to check if it doesn't break stuff in some cases :)

Modified:
    incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php

Modified: incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php
URL: http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php?rev=747098&r1=747097&r2=747098&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php (original)
+++ incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php Mon Feb 23 18:29:45 2009
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -18,7 +19,6 @@
  * under the License.
  */
 
-
 /**
  * Implements the Content-Rewrite feature which rewrites all image, css and script
  * links to their proxied versions, which can be quite a latency improvement, and
@@ -54,7 +54,6 @@
     $gadgetRewriter->addObserver('link', $this, 'rewriteStyleLink');
   }
 
-
   /**
    * Produces the proxied version of a URL if it falls within the content-rewrite params and
    * will append a refresh param to the proxied url based on the expires param, and the gadget
@@ -109,9 +108,37 @@
     }
   }
 
+  /**
+   * Tries to find url(<url tag>) constructs and rewrite them to their
+   * proxied counterparts
+   *
+   * @param DOMElement $node
+   */
   public function rewriteStyle(DOMElement &$node) {
-    // find import('foo') statements
-    // find and rewrite url('foo') statements (background, etc)
+    $content = $node->nodeValue;
+    $newVal = '';
+    // loop through the url elements in the content
+    while (($pos = strpos($content, 'url')) !== false) {
+      // output everything before this url tag
+      $newVal .= substr($content, 0, $pos + 3);
+      $content = substr($content, $pos + 3);
+      // low tech protection against miss-reading tags, if the open ( is to far away, this is probabbly a miss-read
+      if (($beginTag = strpos($content, '(')) < 4) {
+        $content = substr($content, $beginTag + 1);
+        $endTag = strpos($content, ')');
+        $tag = str_replace(array("'", "\""), '', trim(substr($content, 0, $endTag)));
+        // at this point $tag should be the actual url aka: http://example.org/bar/foo.gif
+        if ($this->includedUrl($tag)) {
+          $newVal .= "('" . $this->getProxyUrl($tag) . "')";
+        } else {
+          $newVal .= "('$tag')";
+        }
+        $content = substr($content, $endTag + 1);
+      }
+    }
+    // append what's left
+    $newVal .= $content;
+    $node->nodeValue = $newVal;
   }
 
   public function rewriteScript(DOMElement &$node) {