Author: chabotc
Date: Thu Jul 10 10:47:34 2008
New Revision: 675660
URL: http://svn.apache.org/viewvc?rev=675660&view=rev
Log:
SHINDIG-427 - Add Content-Rewrite support.
Big thanks to Jorge Condomi & Gonzalo Aune for their hard work on this.
This patch impements support for the optional content-rewrite feature,
including support for include-urls, exclude-urls and include and exclude
tags.
Usage (to exclude everything):
<Optional feature="content-rewrite">
<Param name="exclude-urls">.*</Param>
</Optional>
Usage to include everything:
<Optional feature="content-rewrite">
<Param name="include-urls">.*</Param>
</Optional>
See javascript/samplecontainer/examples/rewriter{on,off}.xml as an
example on how to use this.
Rewriting by default has been disabled since this was causing trouble
with quite a few gadgets, so this is an opt-in only feature, however
gadget developers are strongly encouraged to use this since it helps
reduce the load on their servers & latency a lot.
Note: this doesn't currently rewrite the content of included css/js files
since there's no gadget feature state available during the proxy request,
this is something we might change in the future.
This patch also sneaks in a few fixes to the FilesServlet and HttpServlet
classes to optimize the browser caching behaviour.
Added:
incubator/shindig/trunk/php/src/gadgets/rewrite/
incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriteFeature.php
incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php
Modified:
incubator/shindig/trunk/php/config/container.php
incubator/shindig/trunk/php/src/common/HttpServlet.php
incubator/shindig/trunk/php/src/gadgets/ViewSpec.php
incubator/shindig/trunk/php/src/gadgets/http/FilesServlet.php
incubator/shindig/trunk/php/src/gadgets/http/GadgetRenderingServlet.php
incubator/shindig/trunk/php/src/gadgets/http/JsonRpcServlet.php
incubator/shindig/trunk/php/src/gadgets/http/ProxyServlet.php
Modified: incubator/shindig/trunk/php/config/container.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/config/container.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/config/container.php (original)
+++ incubator/shindig/trunk/php/config/container.php Thu Jul 10 10:47:34 2008
@@ -43,7 +43,7 @@
// Allow plain text security tokens, this is only here to allow the
sample files to work. Disable on a production site
'allow_plaintext_token' => true,
// Compress the inlined javascript, saves upto 50% of the document size
- 'compress_javascript' => true,
+ 'compress_javascript' => true,
// The URL Prefix under which shindig lives ie if you have
http://myhost.com/shindig/php set web_prefix to /shindig/php
'web_prefix' => '',
Modified: incubator/shindig/trunk/php/src/common/HttpServlet.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/common/HttpServlet.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/common/HttpServlet.php (original)
+++ incubator/shindig/trunk/php/src/common/HttpServlet.php Thu Jul 10 10:47:34
2008
@@ -40,12 +40,7 @@
// set our default cache time (config cache time defaults to 24
hours aka 1 day)
$this->cacheTime = Config::get('cache_time');
// to do our header magic, we need output buffering on
- $zlib_output = ini_get('zlib.output_compression');
- if ((!$zlib_output || strtolower($zlib_output) == 'off') &&
function_exists('ob_gzhandler')) {
- ob_start('ob_gzhandler');
- } else {
- ob_start();
- }
+ ob_start();
}
/**
@@ -57,7 +52,7 @@
public function __destruct()
{
if (! $this->noHeaders) {
- header("Content-Type: $this->contentType;
charset={$this->charset}");
+ header("Content-Type:
$this->contentType".(!empty($this->charset) ? "; charset={$this->charset}" :
''));
header('Accept-Ranges: bytes');
$content = ob_get_contents();
if ($this->noCache) {
@@ -71,7 +66,7 @@
// Obey browsers (or proxy's) request to send a
fresh copy if we recieve a no-cache pragma or cache-control request
if (! isset($_SERVER['HTTP_PRAGMA']) || !
strstr(strtolower($_SERVER['HTTP_PRAGMA']), 'no-cache') && (!
isset($_SERVER['HTTP_CACHE_CONTROL']) || !
strstr(strtolower($_SERVER['HTTP_CACHE_CONTROL']), 'no-cache'))) {
// If the browser send us a E-TAG check
if it matches (md5 sum of content), if so send a not modified header instead of
content
- $etag = md5($content);
+ $etag = '"'.md5($content).'"';
if
(isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] ==
$etag) {
header("ETag: \"$etag\"");
if ($this->lastModified) {
@@ -82,7 +77,7 @@
ob_end_clean();
die();
}
- header("ETag: \"$etag\"");
+ header("ETag: $etag");
// If no etag is present, then check if
maybe this browser supports if_modified_since tags,
// check it against our lastModified
(if it's set)
if
(isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $this->lastModified && !
isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
@@ -100,6 +95,16 @@
}
}
}
+
+ public function getCharset()
+ {
+ return $this->charset;
+ }
+
+ public function setCharset($charset)
+ {
+ $this->charset = $charset;
+ }
/**
* Sets the time in seconds that the browser's cache should be
Modified: incubator/shindig/trunk/php/src/gadgets/ViewSpec.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/ViewSpec.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/ViewSpec.php (original)
+++ incubator/shindig/trunk/php/src/gadgets/ViewSpec.php Thu Jul 10 10:47:34
2008
@@ -32,7 +32,8 @@
public $view;
public $preferedHeight;
public $preferedWidth;
-
+ public $rewrittenContent;
+
public function __construct($name, $gadgetContent)
{
$attributes = $gadgetContent->attributes();
@@ -56,39 +57,49 @@
$this->type = 'HTML';
}
}
-
+
public function getName()
{
return $this->name;
}
-
+
public function getType()
{
return $this->type;
}
-
+
public function getHref()
{
return $this->href;
}
-
+
public function getQuirks()
{
return $this->quirks;
}
-
+
public function getContent()
{
return $this->content;
}
-
+
public function getView()
{
return $this->view;
}
-
+
public function addContent($data)
{
$this->content .= $data;
}
+
+ public function getRewrittenContent()
+ {
+ return $this->rewrittenContent;
+ }
+
+ public function setRewrittenContent($rewrittenContent)
+ {
+ $this->rewrittenContent = $rewrittenContent;
+ }
}
Modified: incubator/shindig/trunk/php/src/gadgets/http/FilesServlet.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/http/FilesServlet.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/http/FilesServlet.php (original)
+++ incubator/shindig/trunk/php/src/gadgets/http/FilesServlet.php Thu Jul 10
10:47:34 2008
@@ -60,8 +60,17 @@
$this->setContentType('text/javascript');
} elseif ($ext == 'css') {
$this->setContentType('text/css');
+ } elseif ($ext == 'xml') {
+ $this->setContentType('text/xml');
+ } elseif ($ext == 'png') {
+ $this->setContentType('image/png');
+ } elseif ($ext == 'gif') {
+ $this->setContentType('image/gif');
+ } elseif ($ext == 'jpg' || $ext == 'jpeg') {
+ $this->setContentType('image/jpeg');
}
}
+ $this->setCharset('');
$this->setLastModified(filemtime($file));
readfile($file);
}
Modified:
incubator/shindig/trunk/php/src/gadgets/http/GadgetRenderingServlet.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/http/GadgetRenderingServlet.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/http/GadgetRenderingServlet.php
(original)
+++ incubator/shindig/trunk/php/src/gadgets/http/GadgetRenderingServlet.php Thu
Jul 10 10:47:34 2008
@@ -44,6 +44,8 @@
require 'src/gadgets/JsLibrary.php';
require 'src/gadgets/http/HttpUtil.php';
require 'src/gadgets/ContainerConfig.php';
+require 'src/gadgets/rewrite/ContentRewriter.php';
+require 'src/gadgets/rewrite/ContentRewriteFeature.php';
/**
* This class deals with the gadget rendering requests (in default config this
@@ -158,11 +160,11 @@
// Forced libs first.
if (! empty($forcedLibs)) {
$libs = explode(':', $forcedLibs);
- echo sprintf($externFmt,
Config::get('default_js_prefix') . $this->getJsUrl($libs,
$gadget)."&container=".$context->getContainer()) . "\n";
+ echo sprintf($externFmt,
Config::get('default_js_prefix') . $this->getJsUrl($libs, $gadget) .
"&container=" . $context->getContainer()) . "\n";
}
echo "<script>\n";
- if (!empty($forcedLibs)) {
+ if (! empty($forcedLibs)) {
// if some of the feature libraries are externalized
(through a browser cachable <script
src="/gadgets/js/opensocial-0.7:settitle.js">
// type url), then we don't want to include
dependencies twice, so find the complete features chain, so we can skip over
those
$forcedLibsArray = explode(':', $forcedLibs);
@@ -176,20 +178,23 @@
// TODO: This case needs to be handled more
gracefully by the js
// servlet. We should probably inline external
JS as well.
$externJs .= sprintf($externFmt,
$library->getContent()) . "\n";
- // else check if there are no forcedLibs, or if it
wasn't included in their dep chain
- } elseif (empty($forcedLibs) ||
!in_array($library->getFeatureName(), $forcedLibsArray)) {
+ // else check if there are no forcedLibs, or if
it wasn't included in their dep chain
+ } elseif (empty($forcedLibs) || !
in_array($library->getFeatureName(), $forcedLibsArray)) {
echo $library->getContent();
}
// otherwise it was already included by
config.forceJsLibs.
}
- echo $this->appendJsConfig($context, $gadget,
!empty($forcedLibs)) . $this->appendMessages($gadget) .
- $this->appendPreloads($gadget, $context).
- "</script>";
+ echo $this->appendJsConfig($context, $gadget, !
empty($forcedLibs)) . $this->appendMessages($gadget) .
$this->appendPreloads($gadget, $context) . "</script>";
if (strlen($externJs) > 0) {
echo $externJs;
- }
+ }
$gadgetExceptions = array();
- $content =
$gadget->getSubstitutions()->substitute($view->getContent());
+ $rewriter = new ContentRewriter();
+ if ($rewriter->rewriteGadgetView($gadget, $view)) {
+ $content =
$gadget->getSubstitutions()->substitute($view->getRewrittenContent());
+ } else {
+ $content =
$gadget->getSubstitutions()->substitute($view->getContent());
+ }
if (empty($content)) {
// Unknown view
$gadgetExceptions[] = "View: '" . $context->getView() .
"' invalid for gadget: " . $gadget->getId()->getKey();
@@ -197,8 +202,7 @@
if (count($gadgetExceptions)) {
throw new GadgetException(print_r($gadgetExceptions,
true));
}
- echo $content .
-
"\n<script>gadgets.util.runOnLoadHandlers();</script></body>\n</html>";
+ echo $content .
"\n<script>gadgets.util.runOnLoadHandlers();</script></body>\n</html>";
}
/**
@@ -391,9 +395,8 @@
die();
}
$resp[$preload->getHref()] = array(
- 'body' =>
$response->getResponseContent(),
- 'rc' => $response->getHttpCode()
- );
+ 'body' =>
$response->getResponseContent(),
+ 'rc' =>
$response->getHttpCode());
}
} catch (Exception $e) {
throw new Exception($e);
Modified: incubator/shindig/trunk/php/src/gadgets/http/JsonRpcServlet.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/http/JsonRpcServlet.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/http/JsonRpcServlet.php (original)
+++ incubator/shindig/trunk/php/src/gadgets/http/JsonRpcServlet.php Thu Jul 10
10:47:34 2008
@@ -47,6 +47,8 @@
require 'src/gadgets/MessageBundleParser.php';
require 'src/gadgets/MessageBundle.php';
require 'src/gadgets/GadgetException.php';
+require 'src/gadgets/rewrite/ContentRewriter.php';
+require 'src/gadgets/rewrite/ContentRewriteFeature.php';
class JsonRpcServlet extends HttpServlet {
Modified: incubator/shindig/trunk/php/src/gadgets/http/ProxyServlet.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/http/ProxyServlet.php?rev=675660&r1=675659&r2=675660&view=diff
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/http/ProxyServlet.php (original)
+++ incubator/shindig/trunk/php/src/gadgets/http/ProxyServlet.php Thu Jul 10
10:47:34 2008
@@ -28,6 +28,8 @@
require 'src/common/RemoteContentFetcher.php';
require 'src/gadgets/oauth/OAuth.php';
require 'src/gadgets/oauth/OAuthStore.php';
+require 'src/gadgets/rewrite/ContentRewriter.php';
+require 'src/gadgets/rewrite/ContentRewriteFeature.php';
class ProxyServlet extends HttpServlet {
Added: incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriteFeature.php
URL:
http://svn.apache.org/viewvc/incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriteFeature.php?rev=675660&view=auto
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriteFeature.php
(added)
+++ incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriteFeature.php
Thu Jul 10 10:47:34 2008
@@ -0,0 +1,178 @@
+<?php
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+class ContentRewriteFeature {
+ public static $REWRITE_TAG = "content-rewrite";
+ public static $INCLUDE_URLS = "include-urls";
+ public static $EXCLUDE_URLS = "exclude-urls";
+ public static $INCLUDE_TAGS = "include-tags";
+ public static $PROXY_URL = "/gadgets/proxy?url=";
+ private $includeAll = false;
+ private $includeNone = false;
+ private $includeParam;
+ private $excludeParam;
+ private $tagsParam;
+
+ public function createRewriteFeature(Gadget $gadget)
+ {
+ $requires = $gadget->getRequires();
+ $rewriteFeature =
$requires[ContentRewriteFeature::$REWRITE_TAG];
+ $rewriteParams = $rewriteFeature->getParams();
+ if
(isset($rewriteParams[ContentRewriteFeature::$INCLUDE_URLS])) {
+ $this->includeParam =
$this->normalizeParam($rewriteParams[ContentRewriteFeature::$INCLUDE_URLS],
'//');
+ } else {
+ $this->includeParam = '//';
+ }
+ if
(isset($rewriteParams[ContentRewriteFeature::$EXCLUDE_URLS])) {
+ $this->excludeParam =
$this->normalizeParam($rewriteParams[ContentRewriteFeature::$EXCLUDE_URLS],
'//');
+ } else {
+ $this->excludeParam = '//';
+ }
+ if
(isset($rewriteParams[ContentRewriteFeature::$INCLUDE_TAGS])) {
+ $this->tagsParam =
$rewriteParams[ContentRewriteFeature::$INCLUDE_TAGS];
+ $this->tagsParam = explode(',', $this->tagsParam);
+ } else {
+ $this->tagsParam = array();
+ }
+ if ($this->excludeParam == '.*' || $this->includeParam == null)
{
+ $this->includeNone = true;
+ }
+ if ($this->includeParam == '.*' || $this->excludeParam == null)
{
+ $this->includeAll = true;
+ }
+ }
+
+ public function createDefaultRewriteFeature(Gadget $gadget)
+ {
+ $this->includeParam = '/.*/';
+ $this->includeAll = true;
+ }
+
+ public function normalizeParam($paramValue, $defaultVal)
+ {
+ if (empty($paramValue)) {
+ return $defaultVal;
+ }
+ if ($paramValue{0} != '/') {
+ return '/' . $paramValue . '/';
+ } else {
+ return $paramValue;
+ }
+ }
+
+ public function isRewriteEnabled()
+ {
+ return ! $this->includeNone;
+ }
+
+ public function shouldRewriteURL($url)
+ {
+ if ($this->includeNone) {
+ return false;
+ } else
+ if ($this->includeAll) {
+ return true;
+ } else
+ if (preg_match($this->includeParam, $url) != 0)
{
+ return ($this->excludeParam != null &&
preg_match($this->excludeParam, $url) != 0);
+ }
+ return false;
+ }
+
+ public function shouldRewriteTag($tag)
+ {
+ if ($tag != null) {
+ return in_array(strtolower($tag), $this->tagsParam);
+ }
+ return false;
+ }
+
+ public static function defaultHTMLTags()
+ {
+ return array('img' => '/\<img[^\>]*?src\=(\'|\")(.*?)\1/',
+ 'link' =>
'/\<link[^\>]*?href\=(\'|\")(.*?)\1/',
+ 'embed' =>
'/\<embed[^\>]*?src\=(\'|\")(.*?)\1/',
+ 'script' =>
'/\<script[^\>]*?src\=(\'|\")(.*?)\1/',
+ 'style' =>
'/url\(\s*(\'|\"|)([^\'\"]*?)(\'|\"|)\s*\)/');
+ }
+
+ public static function styleRegex()
+ {
+ return array('css' =>
'/url\(\s*(\'|\"|)([^\'\"]*?)(\'|\"|)\s*\)/');
+ }
+
+ public function isTagIncluded($tag)
+ {
+ if (empty($this->tagsParam)) {
+ return false;
+ }
+ return in_array($tag, $this->getTagsParam());
+ }
+
+ public function getExcludeParam()
+ {
+ return $this->excludeParam;
+ }
+
+ public function getIncludeParam()
+ {
+ return $this->includeParam;
+ }
+
+ public function getIncludeAll()
+ {
+ return $this->includeAll;
+ }
+
+ public function getIncludeNone()
+ {
+ return $this->includeNone;
+ }
+
+ public function getTagsParam()
+ {
+ return $this->tagsParam;
+ }
+
+ public function setExcludeParam($excludeParam)
+ {
+ $this->excludeParam = $excludeParam;
+ }
+
+ public function setIncludeParam($includeParam)
+ {
+ $this->includeParam = $includeParam;
+ }
+
+ public function setIncludeAll($includeAll)
+ {
+ $this->includeAll = $includeAll;
+ }
+
+ public function setIncludeNone($includeNone)
+ {
+ $this->includeNone = $includeNone;
+ }
+
+ public function setTagsParam($tagsParam)
+ {
+ $this->tagsParam = $tagsParam;
+ }
+}
Added: 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=675660&view=auto
==============================================================================
--- incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php (added)
+++ incubator/shindig/trunk/php/src/gadgets/rewrite/ContentRewriter.php Thu Jul
10 10:47:34 2008
@@ -0,0 +1,135 @@
+<?php
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+class ContentRewriter {
+
+ public function rewriteGadgetView(Gadget $gadget, ViewSpec $gadgetView)
+ {
+ // Dont rewrite content if the spec is unavailable
+ $requires = $gadget->getRequires();
+ if (isset($requires[ContentRewriteFeature::$REWRITE_TAG])) {
+ // Store the feature in the spec so we dont keep
parsing it
+ $rewriteFeature = new ContentRewriteFeature();
+ $rewriteFeature->createRewriteFeature($gadget);
+ } else {
+ return false;
+ }
+ if (! $rewriteFeature->isRewriteEnabled()) {
+ return false;
+ }
+ if (ContentRewriteFeature::$PROXY_URL != null) {
+ $defaultTags = ContentRewriteFeature::defaultHTMLTags();
+ $htmlTags = null;
+ if (count($rewriteFeature->getTagsParam()) > 0) {
+ foreach ($rewriteFeature->getTagsParam() as
$tag) {
+ if (isset($defaultTags[$tag])) {
+ $htmlTags[$tag] =
$defaultTags[$tag];
+ }
+ }
+ } else {
+ $htmlTags = $defaultTags;
+ }
+ }
+
$gadgetView->setRewrittenContent($this->rewrite($gadgetView->getContent(),
$htmlTags, $rewriteFeature->getExcludeParam(),
$rewriteFeature->getIncludeParam(), Config::get('web_prefix') .
ContentRewriteFeature::$PROXY_URL, $gadget->getId()->getURI(),
$rewriteFeature->getTagsParam()));
+ return true;
+ }
+
+ public function rewriteRequest($request)
+ {
+ if (! $request->isPost() &&
($this->isCSS($request->getContentType()) ||
$this->isHTML($request->getContentType()))) {
+ if ($this->isCSS($request->getContentType())) {
+ $htmlTags = ContentRewriteFeature::styleRegex();
+ } else {
+ $htmlTags =
ContentRewriteFeature::defaultHTMLTags();
+ }
+ $content = $request->getResponseContent();
+ $request->setResponseContent($this->rewrite($content,
$htmlTags, '//', '/(.*)/', Config::get('web_prefix') .
ContentRewriteFeature::$PROXY_URL, $request->getUrl()));
+ }
+ return false;
+ }
+
+ public function rewrite($content, $htmlTags, $excRegex, $incRegex,
$prefix, $gadgetUrl, $tagsParam = null)
+ {
+ $original = $content;
+ $toReplace = array();
+ $toMatch = array();
+ if (isset($htmlTags)) {
+ foreach ($htmlTags as $rx) {
+ $matchTemp = array();
+ @preg_match_all($rx, $content, $matchTemp[0]);
+ if (! empty($matchTemp[0][0])) {
+ $matchTemp[0][1] = $matchTemp[0][2];
+ unset($matchTemp[0][2]);
+ $toMatch = array_merge($toMatch,
$matchTemp);
+ }
+ }
+ }
+ $count = 0;
+ foreach ($toMatch as $match) {
+ $size = count($match[1]);
+ for ($i = 0; $i < $size; $i ++) {
+ $url = trim($match[1][$i]);
+ if (($excRegex != '//' &&
@preg_match($excRegex, $url) != 0) || ($incRegex != '//' &&
@preg_match($incRegex, $url) == 0)) {
+ continue;
+ }
+ $toReplace[$count]['original'] = $match[0][$i];
+ $toReplace[$count]['url'] = $url;
+ if ($this->isRelative($url)) {
+ $lPosition = strrpos($gadgetUrl, "/");
+ $gadgetUrl = substr($gadgetUrl, 0,
$lPosition + 1);
+ $url = $gadgetUrl . $url;
+ }
+ $toReplace[$count]['new'] = $prefix .
urlencode($url);
+ $count ++;
+ }
+ }
+ if (! empty($toReplace)) {
+ foreach ($toReplace as $target) {
+ $tagTemp = str_replace($target['url'],
$target['new'], $target['original']);
+ $content = str_replace($target['original'],
$tagTemp, $content);
+ }
+ } else {
+ return $original;
+ }
+ return $content;
+ }
+
+ private function isRelative($url)
+ {
+ return ! (strpos($url, "http://";) !== false);
+ }
+
+ public function isHTML($mime)
+ {
+ if ($mime == null) {
+ return false;
+ }
+ return (strpos(strtolower($mime), 'html') !== false);
+ }
+
+ public function isCSS($mime)
+ {
+ if ($mime == null) {
+ return false;
+ }
+ return (strpos(strtolower($mime), 'css') !== false);
+ }
+
+}
\ No newline at end of file
