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138d9ca658
* Return the correct Content-Type for SVG favicons * Use mime_content_type to check file type * Use tab instead of spaces * Remove extra blank lines Co-authored-by: Frans de Jonge <fransdejonge@gmail.com> * Update f.php * Better obey HTTP/1.1 304 Not Modified rules about headers https://tools.ietf.org/html/rfc2616#section-10.3.5 * Do not fail if the optional `fileinfo` is not available * Handle more cases such as PNG, GIF, BMP... * Add Content-Type for default favicon * Do not repeat HTTP headers in HTTP 304 response According to https://tools.ietf.org/html/rfc2616#section-10.3.5 it is better not to repeat HTTP headers in a HTTP 304 Not Modified response Co-authored-by: Frans de Jonge <fransdejonge@gmail.com> Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
60 lines
1.6 KiB
PHP
60 lines
1.6 KiB
PHP
<?php
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require(__DIR__ . '/../constants.php');
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require(LIB_PATH . '/lib_rss.php'); //Includes class autoloader
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require(LIB_PATH . '/favicons.php');
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require(LIB_PATH . '/http-conditional.php');
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function show_default_favicon($cacheSeconds = 3600) {
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$default_mtime = @filemtime(DEFAULT_FAVICON);
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if (!httpConditional($default_mtime, $cacheSeconds, 2)) {
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header('Content-Type: image/x-icon');
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header('Content-Disposition: inline; filename="default_favicon.ico"');
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readfile(DEFAULT_FAVICON);
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}
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}
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$id = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '0';
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if (!ctype_xdigit($id)) {
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$id = '0';
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}
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$txt = FAVICONS_DIR . $id . '.txt';
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$ico = FAVICONS_DIR . $id . '.ico';
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$ico_mtime = @filemtime($ico);
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$txt_mtime = @filemtime($txt);
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if ($ico_mtime == false || $ico_mtime < $txt_mtime || ($ico_mtime < time() - (mt_rand(15, 20) * 86400))) {
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if ($txt_mtime == false) {
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show_default_favicon(1800);
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exit();
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}
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// no ico file or we should download a new one.
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$url = file_get_contents($txt);
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if (!download_favicon($url, $ico)) {
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// Download failed
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if ($ico_mtime == false) {
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show_default_favicon(86400);
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exit();
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} else {
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touch($ico);
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}
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}
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}
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if (!httpConditional($ico_mtime, mt_rand(14, 21) * 86400, 2)) {
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$ico_content_type = 'image/x-icon';
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if (function_exists('mime_content_type')) {
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$ico_content_type = mime_content_type($ico);
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}
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switch ($ico_content_type) {
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case 'image/svg':
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$ico_content_type = 'image/svg+xml';
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break;
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}
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header('Content-Type: ' . $ico_content_type);
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header('Content-Disposition: inline; filename="' . $id . '.ico"');
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readfile($ico);
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}
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