root
137 lines
3.8 KiB
PHP
Executable File
137 lines
3.8 KiB
PHP
Executable File
<?php
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declare(strict_types=1);
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namespace app\common\service;
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/**
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* 短链 HTTP 重定向预解析（与 puppeteer-api/url-resolve.js 行为对齐）
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*
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* 用于 antiBot landingUrlHint；CF 拦截时可能失败，浏览器仍会 follow。
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*/
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final class SplitPageUrlResolver
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{
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private const REDIRECT_CODES = [301, 302, 303, 307, 308];
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/**
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* 跟随 HTTP 重定向，返回最终 URL；失败时返回原始 URL
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*/
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public static function resolveFinalUrl(string $pageUrl, int $maxRedirects = 10, int $timeoutSec = 12): string
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{
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$current = trim($pageUrl);
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if ($current === '') {
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return '';
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}
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for ($i = 0; $i < $maxRedirects; $i++) {
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$response = self::fetchHeadOrGet($current, $timeoutSec);
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if ($response === null) {
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return $current;
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}
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$code = $response['code'];
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$location = $response['location'];
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if (!in_array($code, self::REDIRECT_CODES, true) || $location === '') {
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return $current;
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}
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$current = self::resolveRelativeUrl($current, $location);
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}
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return $current;
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}
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/**
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* @return array{code: int, location: string}|null
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*/
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private static function fetchHeadOrGet(string $url, int $timeoutSec): ?array
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{
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$result = self::curlOnce($url, true, $timeoutSec);
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if ($result !== null) {
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return $result;
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}
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return self::curlOnce($url, false, $timeoutSec);
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}
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/**
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* @return array{code: int, location: string}|null
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*/
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private static function curlOnce(string $url, bool $headOnly, int $timeoutSec): ?array
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{
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if (!function_exists('curl_init')) {
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return null;
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}
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$ch = curl_init($url);
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if ($ch === false) {
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return null;
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}
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curl_setopt_array($ch, [
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CURLOPT_NOBODY => $headOnly,
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_FOLLOWLOCATION => false,
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CURLOPT_TIMEOUT => $timeoutSec,
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CURLOPT_HEADER => true,
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CURLOPT_USERAGENT => 'Mozilla/5.0 (compatible; SplitPageUrlResolver/1.0)',
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]);
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$body = curl_exec($ch);
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if ($body === false) {
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curl_close($ch);
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return null;
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}
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$code = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
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$redirectUrl = (string) curl_getinfo($ch, CURLINFO_REDIRECT_URL);
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curl_close($ch);
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$location = $redirectUrl;
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if ($location === '' && is_string($body)) {
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$location = self::parseLocationHeader($body);
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}
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return ['code' => $code, 'location' => trim($location)];
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}
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private static function parseLocationHeader(string $rawHeaders): string
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{
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foreach (preg_split('/\r\n|\n|\r/', $rawHeaders) as $line) {
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if (stripos($line, 'Location:') === 0) {
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return trim(substr($line, 9));
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}
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}
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return '';
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}
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private static function resolveRelativeUrl(string $baseUrl, string $location): string
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{
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if (preg_match('#^https?://#i', $location)) {
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return $location;
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}
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$base = parse_url($baseUrl);
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if (!is_array($base)) {
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return $location;
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}
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$scheme = (string) ($base['scheme'] ?? 'https');
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$host = (string) ($base['host'] ?? '');
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if ($host === '') {
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return $location;
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}
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if (strpos($location, '/') === 0) {
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return $scheme . '://' . $host . $location;
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}
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$path = (string) ($base['path'] ?? '/');
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$dir = rtrim(str_replace(basename($path), '', $path), '/');
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return $scheme . '://' . $host . ($dir !== '' ? $dir . '/' : '/') . $location;
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}
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}
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