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Issue #22 - Fetching url() inside CSS files.

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This commit is contained in:
Daniel Thee Roperto
2016-11-10 17:06:56 +11:00
parent 4232ce1b6e
commit af2e76e972
5 changed files with 97 additions and 14 deletions
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49
classes/local/controllers/maintenance_static_page.php
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@@ -291,12 +291,12 @@ class maintenance_static_page {
if (($rel != 'stylesheet') || ($href == '')) {
continue;
}
$filename = $this->save_url_file($href);
if (is_null($filename)) {
$saved = $this->save_url_file($href);
if (is_null($saved['url'])) {
$url = $href; // Skipped, use original URL.
} else {
$this->update_link_stylesheet_parse($filename);
$url = $this->get_url_for_file($filename);
$this->update_link_stylesheet_parse($saved['file'], dirname($href));
$url = $this->get_url_for_file($saved['url']);
}
$link->setAttribute('href', $url);
}
@@ -306,7 +306,31 @@ class maintenance_static_page {
* Checks for urls inside filename.
* @param string $filename
*/
private function update_link_stylesheet_parse($filename) {
private function update_link_stylesheet_parse($filename, $baseref) {
global $CFG;
$contents = file_get_contents($filename);
if (!preg_match_all('#url\([\'"]?([^\'"\)]+)#', $contents, $matches)) {
return;
}
foreach ($matches[1] as $original_url) {
// Allow incomplete URLs in CSS, assume it is from moodle root.
if (self::is_url($original_url)) {
$full_url = $original_url;
} else if ($original_url[0] == '/') {
$full_url = $CFG->wwwroot.$original_url;
} else {
$full_url = $baseref.'/'.$original_url;
}
$saved = $this->save_url_file($full_url);
if (!is_null($saved)) {
$final_url = $this->get_url_for_file($saved['url']);
$contents = str_replace($original_url, $final_url, $contents);
}
}
file_put_contents($filename, $contents);
}
/**
@@ -346,11 +370,11 @@ class maintenance_static_page {
* @return string Output URL.
*/
private function generate_file_url($url) {
$filename = $this->save_url_file($url);
if (is_null($filename)) {
$saved = $this->save_url_file($url);
if (is_null($saved)) {
return $url; // Skipped, use original URL.
}
return $this->get_url_for_file($filename);
return $this->get_url_for_file($saved['url']);
}
/**
@@ -387,13 +411,14 @@ class maintenance_static_page {
$data = self::file_get_data($url);
$mime = trim(base64_encode($data['mime']), '=');
$filename = sha1($data['contents']).'.'.$mime;
$filepath = $this->get_resources_folder().'/'.$filename;
$url = sha1($data['contents']).'.'.$mime;
$filepath = $this->get_resources_folder().'/'.$url;
file_put_contents($filepath, $data['contents']);
if ($this->preview) {
$filename = 'preview/'.$filename;
$url = 'preview/'.$url;
}
return $filename;
return ['file' => $filepath, 'url' => $url];
}
}