338 lines
12 KiB
PHP
338 lines
12 KiB
PHP
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<?php
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/**
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* 阿里云 OSS 驱动（手写签名 V1 / HMAC-SHA1，不依赖官方 SDK）。
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* （从 MovieLog_Server 移植）
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*
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* ⚠️ 三件事必须记住：
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* ① 写请求把 Content-Type 放进签名串，**读请求要传空串** —— 这是 OSS 签名的坑。
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* ② 内网 endpoint 只用于**服务端读取**，对外 URL 永远用公网/自定义域名。
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* 跨地域时内网域名能解析出 A 记录但永远连不上，会白等满一次连接超时，
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* 所以先比地域（零成本），再只给 2 秒连接超时。
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* ③ endpoint 填写时**不要带 https://**，且必须与桶所在地域一致，
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* 否则报 "must be addressed using the specified endpoint"。
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*/
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declare(strict_types=1);
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namespace App\Storage;
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use App\Setting;
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final class OssDriver implements StorageDriver
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{
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private array $cfg;
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private int $familyId;
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private ?array $cred = null;
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public function __construct(int $familyId, array $cfg)
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{
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$this->familyId = $familyId;
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$this->cfg = $cfg;
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}
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public function id(): string
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{
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return 'oss';
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}
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public function validateConfig(): string
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{
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if (trim((string)$this->cfg['bucket']) === '') {
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return '没有填 Bucket 名称';
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}
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if (trim((string)$this->cfg['endpoint']) === '') {
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return '没有填 Endpoint';
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}
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$auth = ($this->cfg['auth_mode'] ?? 'ak') === 'ecs_role'
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|| (trim((string)($this->cfg['access_key_id'] ?? '')) !== ''
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&& trim((string)($this->cfg['access_key_secret'] ?? '')) !== '');
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if (!$auth) {
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return '凭据不完整：要么填 AccessKey，要么选「用服务器角色」';
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}
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return '';
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}
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// ---------------- 凭据 ----------------
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private function credentials(): array
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{
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if ($this->cred !== null) {
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return $this->cred;
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}
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if (($this->cfg['auth_mode'] ?? 'ak') === 'ecs_role') {
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$c = EcsMeta::ramCredentials($this->familyId, (string)($this->cfg['ram_role_name'] ?? ''));
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if (empty($c['ok'])) {
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return $this->cred = ['ok' => false, 'error' => $c['error'] ?? '取临时凭据失败'];
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}
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return $this->cred = $c;
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}
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$id = trim((string)($this->cfg['access_key_id'] ?? ''));
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$secret = trim((string)($this->cfg['access_key_secret'] ?? ''));
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if ($id === '' || $secret === '') {
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return $this->cred = ['ok' => false, 'error' => '没有填 AccessKey ID / AccessKey Secret'];
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}
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return $this->cred = ['ok' => true, 'id' => $id, 'secret' => $secret, 'token' => '', 'error' => ''];
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}
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// ---------------- endpoint / 域名 ----------------
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private function useHttps(): bool
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{
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return (string)($this->cfg['https'] ?? '1') !== '0';
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}
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private function scheme(): string
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{
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return $this->useHttps() ? 'https' : 'http';
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}
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private function endpoint(): string
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{
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return trim((string)$this->cfg['endpoint']);
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}
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private function host(): string
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{
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return trim((string)$this->cfg['bucket']) . '.' . $this->endpoint();
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}
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/** 内网 endpoint 只从标准域名推导，自定义/VPC 一律不猜 */
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private function internalEndpoint(): string
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{
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if ((string)($this->cfg['internal_endpoint'] ?? '1') === '0') {
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return '';
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}
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$ep = $this->endpoint();
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if ($ep === '' || strpos($ep, '-internal.') !== false) {
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return '';
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}
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if (preg_match('#^(oss-[a-z0-9-]+)\.aliyuncs\.com$#i', $ep, $m)) {
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return $m[1] . '-internal.aliyuncs.com';
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}
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return '';
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}
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/** 内网是否可用：先比地域（零成本），必要时才真探一次 */
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private function internalUsable(): bool
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{
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$internal = $this->internalEndpoint();
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if ($internal === '') {
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return false;
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}
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$cached = json_decode((string)Setting::get($this->familyId, 'cache_oss_internal', ''), true);
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if (is_array($cached) && ($cached['endpoint'] ?? '') === $internal
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&& !empty($cached['expires']) && $cached['expires'] > time()) {
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return !empty($cached['ok']);
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}
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return $this->probeInternal($internal);
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}
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private function probeInternal(string $internal): bool
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{
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$ok = false;
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$reason = '';
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$bucketRegion = $this->bucketRegion();
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$ecsRegion = EcsMeta::region($this->familyId);
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if ($bucketRegion !== '' && $ecsRegion !== '' && $bucketRegion !== $ecsRegion) {
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$reason = "本机在 {$ecsRegion}、桶在 {$bucketRegion}，不是同一地域";
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} else {
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$cred = $this->credentials();
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if (!empty($cred['ok'])) {
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$url = $this->scheme() . '://' . trim((string)$this->cfg['bucket']) . '.' . $internal . '/';
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// HEAD 探测：即使没 ListBucket 权限回 403，也证明网络可达
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$res = Http::send('HEAD', $url, $this->readHeaders('/', $cred, [], 'HEAD'), null, 3, 2);
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$ok = $res['status'] > 0;
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$reason = $ok ? '' : ('连接失败：' . (string)($res['error'] ?? ''));
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} else {
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$reason = '凭据不可用';
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}
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}
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Setting::set($this->familyId, 'cache_oss_internal', json_encode([
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'endpoint' => $internal,
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'ok' => $ok ? 1 : 0,
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'reason' => $reason,
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'expires' => time() + ($ok ? 3600 : 1800),
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], JSON_UNESCAPED_UNICODE));
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return $ok;
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}
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/** 桶所在地域（用 GetBucketLocation，失败则从 endpoint 推） */
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private function bucketRegion(): string
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{
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if (preg_match('#^oss-([a-z0-9-]+)\.aliyuncs\.com$#i', $this->endpoint(), $m)) {
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return $m[1];
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}
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return '';
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}
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// ---------------- 签名 ----------------
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private function authorization(string $method, string $key, string $contentType, string $date, array $cred): string
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{
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$canonicalHeaders = '';
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if ((string)($cred['token'] ?? '') !== '') {
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$canonicalHeaders = "x-oss-security-token:{$cred['token']}\n";
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}
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$canonicalResource = '/' . trim((string)$this->cfg['bucket']) . '/' . ltrim($key, '/');
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$stringToSign = $method . "\n"
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. "\n" // Content-MD5（未使用）
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. $contentType . "\n"
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. $date . "\n"
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. $canonicalHeaders
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. $canonicalResource;
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$signature = base64_encode(hash_hmac('sha1', $stringToSign, $cred['secret'], true));
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return 'OSS ' . $cred['id'] . ':' . $signature;
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}
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private function writeHeaders(string $method, string $key, string $contentType, array $cred): array
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{
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$date = gmdate('D, d M Y H:i:s \G\M\T');
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$h = [
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'Date: ' . $date,
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'Content-Type: ' . $contentType,
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'Authorization: ' . $this->authorization($method, $key, $contentType, $date, $cred),
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];
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if ((string)($cred['token'] ?? '') !== '') {
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$h[] = 'x-oss-security-token: ' . $cred['token'];
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}
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return $h;
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}
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/** 读请求刻意不发 Content-Type，签名串里传空串 */
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private function readHeaders(string $key, array $cred, array $extra = [], string $method = 'GET'): array
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{
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$date = gmdate('D, d M Y H:i:s \G\M\T');
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$h = [
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'Date: ' . $date,
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'Authorization: ' . $this->authorization($method, $key, '', $date, $cred),
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];
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if ((string)($cred['token'] ?? '') !== '') {
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$h[] = 'x-oss-security-token: ' . $cred['token'];
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}
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foreach ($extra as $x) {
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$h[] = $x;
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}
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return $h;
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}
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// ---------------- 对象操作 ----------------
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private function objectKey(string $key): string
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{
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$prefix = trim((string)($this->cfg['prefix'] ?? ''), '/');
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$key = ltrim($key, '/');
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return $prefix === '' ? $key : $prefix . '/' . $key;
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}
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private function objectUrl(string $key): string
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{
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return $this->scheme() . '://' . $this->host() . '/' . Http::encodeKey($key);
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}
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public function putFile(string $srcPath, string $key, ?string $mime = null): array
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{
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if (!is_file($srcPath)) {
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return ['ok' => false, 'error' => '本地文件不存在'];
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}
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$binary = @file_get_contents($srcPath);
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if ($binary === false) {
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return ['ok' => false, 'error' => '读不出本地文件'];
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}
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return $this->putContents($binary, $key, $mime);
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}
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public function putContents(string $binary, string $key, ?string $mime = null): array
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{
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if ($err = $this->validateConfig()) {
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return ['ok' => false, 'error' => $err];
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}
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$cred = $this->credentials();
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if (empty($cred['ok'])) {
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return ['ok' => false, 'error' => $cred['error']];
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}
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$key = $this->objectKey($key);
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$mime = $mime ?: 'application/octet-stream';
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$res = Http::send('PUT', $this->objectUrl($key),
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$this->writeHeaders('PUT', $key, $mime, $cred), $binary, 60);
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if (!$res['ok']) {
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return ['ok' => false, 'error' => '上传到 OSS 失败：' . Http::shortError($res)];
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}
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return ['ok' => true, 'error' => ''];
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}
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public function delete(string $key): array
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{
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$cred = $this->credentials();
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if (empty($cred['ok'])) {
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return ['ok' => false, 'error' => $cred['error']];
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}
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$key = $this->objectKey($key);
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$res = Http::send('DELETE', $this->objectUrl($key),
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$this->writeHeaders('DELETE', $key, '', $cred), null, 30);
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if (!$res['ok'] && (int)$res['status'] !== 404) {
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return ['ok' => false, 'error' => '删除 OSS 对象失败：' . Http::shortError($res)];
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}
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return ['ok' => true, 'error' => ''];
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}
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/** 服务端读取（内网优先 + 自动回退外网） */
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public function get(string $key, array $extra = []): array
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{
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if ($err = $this->validateConfig()) {
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return ['ok' => false, 'status' => 0, 'headers' => [], 'body' => '', 'error' => $err];
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}
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$cred = $this->credentials();
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if (empty($cred['ok'])) {
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return ['ok' => false, 'status' => 0, 'headers' => [], 'body' => '', 'error' => $cred['error']];
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}
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$key = $this->objectKey($key);
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$headers = $this->readHeaders($key, $cred, $extra);
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$hosts = [];
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$internal = $this->internalEndpoint();
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if ($internal !== '' && $this->internalUsable()) {
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$hosts[] = $internal;
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}
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$hosts[] = $this->endpoint();
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$res = null;
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foreach ($hosts as $i => $host) {
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$isInternal = ($internal !== '' && $host === $internal);
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$url = $this->scheme() . '://' . trim((string)$this->cfg['bucket']) . '.' . $host
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. '/' . Http::encodeKey($key);
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$res = Http::send('GET', $url, $headers, null, 60, $isInternal ? 2 : null);
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if ((int)$res['status'] === 0 && $isInternal && isset($hosts[$i + 1])) {
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continue; // 内网连不上，换外网
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}
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break;
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}
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return $res ?: ['ok' => false, 'status' => 0, 'headers' => [], 'body' => '', 'error' => '连不上 OSS'];
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}
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public function exists(string $key): bool
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{
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$cred = $this->credentials();
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if (empty($cred['ok'])) {
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return false;
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}
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$key = $this->objectKey($key);
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$res = Http::send('HEAD', $this->objectUrl($key), $this->readHeaders($key, $cred, [], 'HEAD'), null, 15);
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return (int)$res['status'] === 200;
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}
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/** 对外地址：优先自定义域名/CDN */
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public function url(string $key): string
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{
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$key = $this->objectKey($key);
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$custom = trim((string)($this->cfg['custom_domain'] ?? ''));
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if ($custom !== '') {
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$host = Http::hostOf($custom);
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return (strpos($custom, 'http') === 0 ? rtrim($custom, '/') : $this->scheme() . '://' . $host)
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. '/' . Http::encodeKey($key);
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}
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return $this->objectUrl($key);
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}
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}
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