76 lines
1.8 KiB
PHP
76 lines
1.8 KiB
PHP
<?php
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$file = 'counter.dat';
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// 读取并自增
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$counter = (int)@file_get_contents($file);
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$counter++;
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// 使用 LOCK_EX 防止并发写入冲突
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file_put_contents($file, $counter, LOCK_EX);
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header('Content-Type: image/x-icon');
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if (!isset($_GET['url'])) {
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header('HTTP/1.1 400 Bad Request');
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exit('URL parameter is required');
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}
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$url = $_GET['url'];
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// 自动补全协议前缀
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if (!preg_match('/^https?:\/\//i', $url)) {
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$url = 'https://' . $url;
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}
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if (!filter_var($url, FILTER_VALIDATE_URL)) {
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header('HTTP/1.1 400 Bad Request');
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exit('Invalid URL format');
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}
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$domain = parse_url($url, PHP_URL_HOST);
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$scheme = parse_url($url, PHP_URL_SCHEME);
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$faviconUrl = $scheme . '://' . $domain . '/favicon.ico';
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// 尝试获取favicon，最多重试3次
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$maxRetries = 3;
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$retryCount = 0;
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$data = null;
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$httpCode = 0;
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do {
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$ch = curl_init($faviconUrl);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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// 根据协议设置SSL验证
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if (parse_url($faviconUrl, PHP_URL_SCHEME) === 'https') {
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
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}
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curl_setopt($ch, CURLOPT_TIMEOUT, 5); // 5秒超时
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3); // 3秒连接超时
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$data = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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$error = curl_error($ch);
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curl_close($ch);
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$retryCount++;
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if ($httpCode === 200 && !empty($data)) {
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break;
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}
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if ($retryCount < $maxRetries) {
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sleep(1); // 等待1秒后重试
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}
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} while ($retryCount < $maxRetries);
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if ($httpCode === 200 && !empty($data)) {
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echo $data;
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} else {
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header('HTTP/1.1 404 Not Found');
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exit('Favicon not found: ' . ($error ?? 'Unknown error'));
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}
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?>
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