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hajimi
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<?php
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namespace app\common\service\article;
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use think\Response;
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class ArticleImageProxyService
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{
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private const SOURCE_HOSTS = [
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'hkjc_racingnews' => [
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'res.hkjc.com',
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'racingnews.hkjc.com',
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],
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'taiwan_lottery' => [
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'cdn.taiwanlottery.com.tw',
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'www.taiwanlottery.com',
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'taiwanlottery.com',
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],
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];
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private const SOURCE_REFERERS = [
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'hkjc_racingnews' => 'https://racingnews.hkjc.com/',
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'taiwan_lottery' => 'https://www.taiwanlottery.com/',
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];
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public static function rewriteArticlePayload(array $article): array
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{
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$ext = self::decodeExt($article['ext'] ?? []);
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if (!self::shouldRewrite($ext)) {
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return $article;
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}
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if (!empty($article['image'])) {
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$article['image'] = self::buildProxyUrl((string) $article['image'], $ext);
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}
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if (!empty($article['content'])) {
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$article['content'] = preg_replace_callback(
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'/(<img\b[^>]*\bsrc=["\'])([^"\']+)(["\'][^>]*>)/i',
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static function (array $matches) use ($ext) {
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$proxyUrl = self::buildProxyUrl($matches[2] ?? '', $ext);
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if ($proxyUrl === '' || $proxyUrl === ($matches[2] ?? '')) {
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return $matches[0];
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}
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return $matches[1]
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. htmlspecialchars($proxyUrl, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8')
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. $matches[3];
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},
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(string) $article['content']
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);
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}
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return $article;
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}
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public static function proxyRemoteImage(string $url): Response
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{
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$normalizedUrl = self::normalizeUrl($url);
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if ($normalizedUrl === '' || !self::isAllowedRemoteUrl($normalizedUrl)) {
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return response('image not found', 404)->header([
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'Content-Type' => 'text/plain; charset=utf-8',
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'Cache-Control' => 'public, max-age=300',
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]);
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}
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$source = self::detectSourceByUrl($normalizedUrl);
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$headers = [
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'Accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8',
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'User-Agent: Mozilla/5.0 (compatible; SportEra/1.0)',
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];
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$referer = self::SOURCE_REFERERS[$source] ?? '';
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if ($referer !== '') {
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$headers[] = 'Referer: ' . $referer;
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}
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$ch = curl_init($normalizedUrl);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_FOLLOWLOCATION => true,
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CURLOPT_MAXREDIRS => 3,
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CURLOPT_CONNECTTIMEOUT => 10,
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CURLOPT_TIMEOUT => 20,
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CURLOPT_ENCODING => '',
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CURLOPT_HTTPHEADER => $headers,
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]);
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$body = curl_exec($ch);
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$httpCode = (int) curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
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$contentType = (string) curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
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$effectiveUrl = (string) curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
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$curlError = curl_error($ch);
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curl_close($ch);
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if ($body === false || $curlError !== '' || $httpCode < 200 || $httpCode >= 300) {
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return response('image not found', 404)->header([
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'Content-Type' => 'text/plain; charset=utf-8',
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'Cache-Control' => 'public, max-age=300',
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]);
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}
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$effectiveUrl = $effectiveUrl !== '' ? $effectiveUrl : $normalizedUrl;
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if (!self::isAllowedRemoteUrl($effectiveUrl)) {
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return response('image not found', 404)->header([
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'Content-Type' => 'text/plain; charset=utf-8',
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'Cache-Control' => 'public, max-age=300',
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]);
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}
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$contentType = self::normalizeContentType($contentType, $effectiveUrl);
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if (!str_starts_with($contentType, 'image/')) {
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return response('image not found', 404)->header([
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'Content-Type' => 'text/plain; charset=utf-8',
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'Cache-Control' => 'public, max-age=300',
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]);
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}
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return response($body, 200)->header([
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'Content-Type' => $contentType,
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'Cache-Control' => 'public, max-age=86400',
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'Access-Control-Allow-Origin' => '*',
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]);
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}
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private static function shouldRewrite(array $ext): bool
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{
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$source = (string) ($ext['source'] ?? '');
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return isset(self::SOURCE_HOSTS[$source]);
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}
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private static function buildProxyUrl(string $url, array $ext = []): string
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{
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$normalizedUrl = self::normalizeUrl($url);
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if ($normalizedUrl === '' || self::isLocalProxyUrl($normalizedUrl)) {
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return $url;
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}
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if (!self::isAllowedRemoteUrl($normalizedUrl, $ext)) {
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return $url;
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}
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$path = '/api/article/imageProxy?url=' . rawurlencode($normalizedUrl);
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$domain = rtrim((string) request()->domain(), '/');
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return $domain !== '' ? $domain . $path : $path;
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}
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private static function normalizeUrl(string $url): string
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{
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$url = trim(html_entity_decode($url, ENT_QUOTES | ENT_HTML5, 'UTF-8'));
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if ($url === '') {
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return '';
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}
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if (str_starts_with($url, '//')) {
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return 'https:' . $url;
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}
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return $url;
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}
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private static function isAllowedRemoteUrl(string $url, array $ext = []): bool
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{
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$parts = parse_url($url);
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$scheme = strtolower((string) ($parts['scheme'] ?? ''));
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$host = strtolower((string) ($parts['host'] ?? ''));
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if ($host === '' || !in_array($scheme, ['http', 'https'], true)) {
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return false;
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}
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$allowedHosts = self::getAllowedHosts($ext);
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foreach ($allowedHosts as $allowedHost) {
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$allowedHost = strtolower($allowedHost);
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if ($host === $allowedHost || str_ends_with($host, '.' . $allowedHost)) {
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return true;
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}
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}
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return false;
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}
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private static function getAllowedHosts(array $ext = []): array
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{
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$source = (string) ($ext['source'] ?? '');
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if ($source !== '' && isset(self::SOURCE_HOSTS[$source])) {
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return self::SOURCE_HOSTS[$source];
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}
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$allHosts = [];
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foreach (self::SOURCE_HOSTS as $hosts) {
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$allHosts = array_merge($allHosts, $hosts);
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}
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return array_values(array_unique($allHosts));
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}
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private static function detectSourceByUrl(string $url): string
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{
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$parts = parse_url($url);
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$host = strtolower((string) ($parts['host'] ?? ''));
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foreach (self::SOURCE_HOSTS as $source => $hosts) {
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foreach ($hosts as $allowedHost) {
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$allowedHost = strtolower($allowedHost);
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if ($host === $allowedHost || str_ends_with($host, '.' . $allowedHost)) {
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return $source;
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}
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}
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}
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return '';
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}
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private static function isLocalProxyUrl(string $url): bool
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{
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return str_contains($url, '/api/article/imageProxy?');
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}
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private static function normalizeContentType(string $contentType, string $url): string
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{
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$contentType = strtolower(trim(explode(';', $contentType)[0] ?? ''));
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if (str_starts_with($contentType, 'image/')) {
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return $contentType;
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}
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$path = strtolower((string) parse_url($url, PHP_URL_PATH));
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return match (pathinfo($path, PATHINFO_EXTENSION)) {
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'jpg', 'jpeg' => 'image/jpeg',
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'png' => 'image/png',
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'gif' => 'image/gif',
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'webp' => 'image/webp',
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'svg' => 'image/svg+xml',
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default => 'application/octet-stream',
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};
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}
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private static function decodeExt($ext): array
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{
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if (is_array($ext)) {
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return $ext;
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}
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if (is_string($ext) && $ext !== '') {
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$decoded = json_decode($ext, true);
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return is_array($decoded) ? $decoded : [];
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}
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return [];
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}
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}
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