220 lines
7.9 KiB
Go
220 lines
7.9 KiB
Go
package service
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import (
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"context"
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"errors"
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"log/slog"
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"strconv"
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"strings"
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"time"
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)
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const (
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claudeTokenRefreshSkew = 3 * time.Minute
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claudeTokenCacheSkew = 5 * time.Minute
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claudeLockWaitTime = 200 * time.Millisecond
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)
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// ClaudeTokenCache Token 缓存接口（复用 GeminiTokenCache 接口定义）
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type ClaudeTokenCache = GeminiTokenCache
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// ClaudeTokenProvider 管理 Claude (Anthropic) OAuth 账户的 access_token
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type ClaudeTokenProvider struct {
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accountRepo AccountRepository
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tokenCache ClaudeTokenCache
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oauthService *OAuthService
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}
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func NewClaudeTokenProvider(
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accountRepo AccountRepository,
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tokenCache ClaudeTokenCache,
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oauthService *OAuthService,
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) *ClaudeTokenProvider {
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return &ClaudeTokenProvider{
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accountRepo: accountRepo,
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tokenCache: tokenCache,
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oauthService: oauthService,
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}
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}
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// GetAccessToken 获取有效的 access_token
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func (p *ClaudeTokenProvider) GetAccessToken(ctx context.Context, account *Account) (string, error) {
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if account == nil {
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return "", errors.New("account is nil")
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}
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if account.Platform != PlatformAnthropic || account.Type != AccountTypeOAuth {
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return "", errors.New("not an anthropic oauth account")
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}
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cacheKey := ClaudeTokenCacheKey(account)
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// 1. 先尝试缓存
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if p.tokenCache != nil {
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if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
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slog.Debug("claude_token_cache_hit", "account_id", account.ID)
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return token, nil
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} else if err != nil {
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slog.Warn("claude_token_cache_get_failed", "account_id", account.ID, "error", err)
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}
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}
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slog.Debug("claude_token_cache_miss", "account_id", account.ID)
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// 2. 如果即将过期则刷新
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expiresAt := account.GetCredentialAsTime("expires_at")
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needsRefresh := expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew
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refreshFailed := false
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if needsRefresh && p.tokenCache != nil {
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locked, lockErr := p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
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if lockErr == nil && locked {
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defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
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// 拿到锁后再次检查缓存（另一个 worker 可能已刷新）
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if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
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return token, nil
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}
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// 从数据库获取最新账户信息
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fresh, err := p.accountRepo.GetByID(ctx, account.ID)
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if err == nil && fresh != nil {
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account = fresh
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}
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expiresAt = account.GetCredentialAsTime("expires_at")
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if expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew {
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if p.oauthService == nil {
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slog.Warn("claude_oauth_service_not_configured", "account_id", account.ID)
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refreshFailed = true // 无法刷新，标记失败
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} else {
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tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
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if err != nil {
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// 刷新失败时记录警告，但不立即返回错误，尝试使用现有 token
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slog.Warn("claude_token_refresh_failed", "account_id", account.ID, "error", err)
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refreshFailed = true // 刷新失败，标记以使用短 TTL
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} else {
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// 构建新 credentials，保留原有字段
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newCredentials := make(map[string]any)
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for k, v := range account.Credentials {
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newCredentials[k] = v
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}
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newCredentials["access_token"] = tokenInfo.AccessToken
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newCredentials["token_type"] = tokenInfo.TokenType
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newCredentials["expires_in"] = strconv.FormatInt(tokenInfo.ExpiresIn, 10)
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newCredentials["expires_at"] = strconv.FormatInt(tokenInfo.ExpiresAt, 10)
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if tokenInfo.RefreshToken != "" {
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newCredentials["refresh_token"] = tokenInfo.RefreshToken
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}
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if tokenInfo.Scope != "" {
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newCredentials["scope"] = tokenInfo.Scope
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}
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account.Credentials = newCredentials
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if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
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slog.Error("claude_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
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}
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expiresAt = account.GetCredentialAsTime("expires_at")
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}
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}
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}
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} else if lockErr != nil {
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// Redis 错误导致无法获取锁，降级为无锁刷新（仅在 token 接近过期时）
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slog.Warn("claude_token_lock_failed_degraded_refresh", "account_id", account.ID, "error", lockErr)
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// 检查 ctx 是否已取消
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if ctx.Err() != nil {
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return "", ctx.Err()
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}
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// 从数据库获取最新账户信息
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if p.accountRepo != nil {
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fresh, err := p.accountRepo.GetByID(ctx, account.ID)
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if err == nil && fresh != nil {
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account = fresh
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}
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}
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expiresAt = account.GetCredentialAsTime("expires_at")
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// 仅在 expires_at 已过期/接近过期时才执行无锁刷新
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if expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew {
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if p.oauthService == nil {
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slog.Warn("claude_oauth_service_not_configured", "account_id", account.ID)
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refreshFailed = true
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} else {
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tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
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if err != nil {
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slog.Warn("claude_token_refresh_failed_degraded", "account_id", account.ID, "error", err)
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refreshFailed = true
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} else {
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// 构建新 credentials，保留原有字段
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newCredentials := make(map[string]any)
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for k, v := range account.Credentials {
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newCredentials[k] = v
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}
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newCredentials["access_token"] = tokenInfo.AccessToken
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newCredentials["token_type"] = tokenInfo.TokenType
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newCredentials["expires_in"] = strconv.FormatInt(tokenInfo.ExpiresIn, 10)
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newCredentials["expires_at"] = strconv.FormatInt(tokenInfo.ExpiresAt, 10)
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if tokenInfo.RefreshToken != "" {
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newCredentials["refresh_token"] = tokenInfo.RefreshToken
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}
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if tokenInfo.Scope != "" {
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newCredentials["scope"] = tokenInfo.Scope
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}
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account.Credentials = newCredentials
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if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
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slog.Error("claude_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
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}
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expiresAt = account.GetCredentialAsTime("expires_at")
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}
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}
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}
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} else {
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// 锁获取失败（被其他 worker 持有），等待 200ms 后重试读取缓存
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time.Sleep(claudeLockWaitTime)
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if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
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slog.Debug("claude_token_cache_hit_after_wait", "account_id", account.ID)
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return token, nil
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}
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}
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}
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accessToken := account.GetCredential("access_token")
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if strings.TrimSpace(accessToken) == "" {
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return "", errors.New("access_token not found in credentials")
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}
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// 3. 存入缓存（验证版本后再写入，避免异步刷新任务与请求线程的竞态条件）
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if p.tokenCache != nil {
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latestAccount, isStale := CheckTokenVersion(ctx, account, p.accountRepo)
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if isStale && latestAccount != nil {
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// 版本过时，使用 DB 中的最新 token
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slog.Debug("claude_token_version_stale_use_latest", "account_id", account.ID)
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accessToken = latestAccount.GetCredential("access_token")
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if strings.TrimSpace(accessToken) == "" {
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return "", errors.New("access_token not found after version check")
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}
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// 不写入缓存，让下次请求重新处理
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} else {
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ttl := 30 * time.Minute
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if refreshFailed {
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// 刷新失败时使用短 TTL，避免失效 token 长时间缓存导致 401 抖动
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ttl = time.Minute
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slog.Debug("claude_token_cache_short_ttl", "account_id", account.ID, "reason", "refresh_failed")
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} else if expiresAt != nil {
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until := time.Until(*expiresAt)
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switch {
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case until > claudeTokenCacheSkew:
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ttl = until - claudeTokenCacheSkew
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case until > 0:
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ttl = until
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default:
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ttl = time.Minute
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}
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}
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if err := p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl); err != nil {
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slog.Warn("claude_token_cache_set_failed", "account_id", account.ID, "error", err)
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}
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}
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}
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return accessToken, nil
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}
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