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Code Issues Releases Wiki Activity

DiskCache: properly deal with srcset attributes

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This commit is contained in:
Andrew Dolgov
2020-04-29 19:29:36 +03:00
parent e934e9f05e
commit 3a4b9249a9
2 changed files with 61 additions and 29 deletions
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33
classes/diskcache.php
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@@ -79,6 +79,7 @@ class DiskCache {
// check for locally cached (media) URLs and rewrite to local versions
// this is called separately after sanitize() and plugin render article hooks to allow
// plugins work on original source URLs used before caching
// NOTE: URLs should be already absolutized because this is called after sanitize()
static public function rewriteUrls($str)
{
$res = trim($str);
@@ -89,29 +90,45 @@ class DiskCache {
$xpath = new DOMXPath($doc);
$cache = new DiskCache("images");
$entries = $xpath->query('(//img[@src]|//picture/source[@src]|//video[@poster]|//video[@src]|//video/source[@src]|//audio/source[@src])');
$entries = $xpath->query('(//img[@src]|//source[@src|@srcset]|//video[@poster|@src])');
$need_saving = false;
foreach ($entries as $entry) {
foreach (array('src', 'poster') as $attr) {
if ($entry->hasAttribute($attr)) {
// should be already absolutized because this is called after sanitize()
$src = $entry->getAttribute($attr);
$cached_filename = sha1($src);
$url = $entry->getAttribute($attr);
$cached_filename = sha1($url);
if ($cache->exists($cached_filename)) {
$url = $cache->getUrl($cached_filename);
$src = $cache->getUrl(sha1($src));
$entry->setAttribute($attr, $src);
$entry->setAttribute($attr, $url);
$entry->removeAttribute("srcset");
$need_saving = true;
}
}
}
if ($entry->hasAttribute("srcset")) {
$tokens = explode(",", $entry->getAttribute('srcset'));
for ($i = 0; $i < count($tokens); $i++) {
$token = trim($tokens[$i]);
list ($url, $width) = explode(" ", $token, 2);
$cached_filename = sha1($url);
if ($cache->exists($cached_filename)) {
$tokens[$i] = $cache->getUrl($cached_filename) . " " . $width;
$need_saving = true;
}
}
$entry->setAttribute("srcset", implode(", ", $tokens));
}
}
if ($need_saving) {