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Let 'RSSUtils::check_feed_favicon' update existing favicons.

This commit is contained in:
wn_ 2021-02-21 18:40:43 +00:00
parent 861a632ac7
commit cb401af6f6
1 changed files with 64 additions and 50 deletions
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114
classes/rssutils.php
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@ -594,7 +594,7 @@ class RSSUtils {
$favicon_file = ICONS_DIR . "/$feed.ico";
$favicon_modified = file_exists($favicon_file) ? filemtime($favicon_file) : -1;
Debug::log("checking favicon...", Debug::$LOG_VERBOSE);
Debug::log("checking favicon for feed $feed...", Debug::$LOG_VERBOSE);
self::check_feed_favicon($site_url, $feed);
$favicon_modified_new = file_exists($favicon_file) ? filemtime($favicon_file) : -1;
@ -1643,58 +1643,72 @@ class RSSUtils {
}
static function check_feed_favicon($site_url, $feed) {
# print "FAVICON [$site_url]: $favicon_url\n";
$icon_file = ICONS_DIR . "/$feed.ico";
if (!file_exists($icon_file)) {
$favicon_url = self::get_favicon_url($site_url);
if ($favicon_url) {
// Limiting to "image" type misses those served with text/plain
$contents = UrlHelper::fetch($favicon_url); // , "image");
if ($contents) {
// Crude image type matching.
// Patterns gleaned from the file(1) source code.
if (preg_match('/^\x00\x00\x01\x00/', $contents)) {
// 0 string \000\000\001\000 MS Windows icon resource
//error_log("check_feed_favicon: favicon_url=$favicon_url isa MS Windows icon resource");
}
elseif (preg_match('/^GIF8/', $contents)) {
// 0 string GIF8 GIF image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa GIF image");
}
elseif (preg_match('/^\x89PNG\x0d\x0a\x1a\x0a/', $contents)) {
// 0 string \x89PNG\x0d\x0a\x1a\x0a PNG image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa PNG image");
}
elseif (preg_match('/^\xff\xd8/', $contents)) {
// 0 beshort 0xffd8 JPEG image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa JPG image");
}
elseif (preg_match('/^BM/', $contents)) {
// 0 string BM PC bitmap (OS2, Windows BMP files)
//error_log("check_feed_favicon, favicon_url=$favicon_url isa BMP image");
}
else {
//error_log("check_feed_favicon: favicon_url=$favicon_url isa UNKNOWN type");
$contents = "";
}
}
if ($contents) {
$fp = @fopen($icon_file, "w");
if ($fp) {
fwrite($fp, $contents);
fclose($fp);
chmod($icon_file, 0644);
}
}
}
return $icon_file;
$favicon_url = self::get_favicon_url($site_url);
if (!$favicon_url) {
Debug::log("couldn't find favicon URL in $site_url", Debug::$LOG_VERBOSE);
return false;
}
// Limiting to "image" type misses those served with text/plain
$contents = UrlHelper::fetch(['url' => $favicon_url]); // , "image");
if (!$contents) {
Debug::log("fetching favicon $favicon_url failed", Debug::$LOG_VERBOSE);
return false;
}
$original_contents = file_exists($icon_file) ? file_get_contents($icon_file) : null;
if ($original_contents) {
if (strcmp($contents, $original_contents) === 0) {
Debug::log("favicon content has not changed", Debug::$LOG_VERBOSE);
return $icon_file;
}
Debug::log("favicon content has changed", Debug::$LOG_VERBOSE);
}
// Crude image type matching.
// Patterns gleaned from the file(1) source code.
if (preg_match('/^\x00\x00\x01\x00/', $contents)) {
// 0 string \000\000\001\000 MS Windows icon resource
//error_log("check_feed_favicon: favicon_url=$favicon_url isa MS Windows icon resource");
}
elseif (preg_match('/^GIF8/', $contents)) {
// 0 string GIF8 GIF image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa GIF image");
}
elseif (preg_match('/^\x89PNG\x0d\x0a\x1a\x0a/', $contents)) {
// 0 string \x89PNG\x0d\x0a\x1a\x0a PNG image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa PNG image");
}
elseif (preg_match('/^\xff\xd8/', $contents)) {
// 0 beshort 0xffd8 JPEG image data
//error_log("check_feed_favicon: favicon_url=$favicon_url isa JPG image");
}
elseif (preg_match('/^BM/', $contents)) {
// 0 string BM PC bitmap (OS2, Windows BMP files)
//error_log("check_feed_favicon, favicon_url=$favicon_url isa BMP image");
}
else {
//error_log("check_feed_favicon: favicon_url=$favicon_url isa UNKNOWN type");
Debug::log("favicon $favicon_url type is unknown (not updating)", Debug::$LOG_VERBOSE);
return false;
}
Debug::log("setting contents of $icon_file", Debug::$LOG_VERBOSE);
$fp = @fopen($icon_file, "w");
if (!$fp) {
Debug::log("failed to open $icon_file for writing", Debug::$LOG_VERBOSE);
return false;
}
fwrite($fp, $contents);
fclose($fp);
chmod($icon_file, 0644);
clearstatcache();
return $icon_file;
}
static function is_gzipped($feed_data) {