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81 lines
2.3 KiB
PHP
81 lines
2.3 KiB
PHP
<?php
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namespace Code\Lib;
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use Code\Daemon\Run;
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class Img_cache
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{
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public static int $cache_life = 18600 * 7;
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public static function get_filename($url, $prefix = '.'): string
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{
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return Hashpath::path($url, $prefix);
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}
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// Check to see if we have this url in our cache
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// If we have it return true.
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// If we do not, or the cache file is empty or expired, return false
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// but attempt to fetch the entry in the background
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public static function check($url, $prefix = '.'): bool
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{
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if (str_contains($url, z_root())) {
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return false;
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}
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$path = self::get_filename($url, $prefix);
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if (file_exists($path)) {
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$t = filemtime($path);
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if ($t && time() - $t >= self::$cache_life) {
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Run::Summon(['Cache_image', $url, $path]);
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return false;
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} else {
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return (bool)filesize($path);
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}
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}
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// Cache_image invokes url_to_cache() as a background task
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Run::Summon(['Cache_image', $url, $path]);
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return false;
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}
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public static function url_to_cache($url, $file): bool
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{
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$fp = fopen($file, 'wb');
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if (!$fp) {
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logger('failed to open storage file: ' . $file, LOGGER_NORMAL, LOG_ERR);
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return false;
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}
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// don't check certs, and since we're running in the background,
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// allow a two-minute timeout rather than the default one minute.
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// This is a compromise. We want to cache all the slow sites we can,
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// but don't want to rack up too many processes doing so.
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$x = Url::get($url, ['filep' => $fp, 'novalidate' => true, 'timeout' => 120]);
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fclose($fp);
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if ($x['success'] && file_exists($file)) {
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$i = @getimagesize($file);
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if ($i && $i[2]) { // looking for non-zero imagetype
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Run::Summon(['CacheThumb', basename($file)]);
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return true;
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}
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}
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// We could not cache the image for some reason. Leave an empty file here
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// to provide a record of the attempt. We'll use this as a flag to avoid
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// doing it again repeatedly.
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file_put_contents($file, EMPTY_STR);
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logger('cache failed from ' . $url);
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return false;
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}
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}
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