fix: 修正 OpenAI/Anthropic Provider 初始化参数顺序

修复 manager.go 中两处调用 NewOpenAIProvider 和 NewAnthropicProvider 时参数顺序错误的问题。原代码将 baseURL 和 apiKey 参数传反，导致 API key 被当作 URL 使用，引发 "unsupported protocol scheme" 错误。 Changed: - LoadProvidersFromDB: 调整参数顺序为 (apiKey, baseURL, "") - GetActiveProvider: 调整参数顺序为 (apiKey, baseURL, "")
2026-06-22 18:02:23 +08:00
parent 56401ec7ee
commit fe2c6fb2e4
7 changed files with 329 additions and 18 deletions
@@ -7,20 +7,40 @@ import (
 	"fmt"
 	"io"
 	"strings"
+	"sync"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
 )

 // Manager manages multiple LLM providers and routes requests.
 type Manager struct {
 	providers map[string]Provider
 	fallback  string
+	pool      *pgxpool.Pool
+	cache     map[string]providerCacheEntry
+	cacheMu   sync.RWMutex
+	cacheTTL  time.Duration
+}
+
+type providerCacheEntry struct {
+	provider  Provider
+	updatedAt time.Time
 }

 func NewManager() *Manager {
 	return &Manager{
 		providers: make(map[string]Provider),
+		cache:     make(map[string]providerCacheEntry),
+		cacheTTL:  5 * time.Minute, // 缓存 5 分钟
 	}
 }

+// SetPool 设置数据库连接池，用于从数据库加载 providers
+func (m *Manager) SetPool(pool *pgxpool.Pool) {
+	m.pool = pool
+}
+
 func (m *Manager) Register(name string, provider Provider) {
 	m.providers[name] = provider
 	if m.fallback == "" {
@@ -32,6 +52,132 @@ func (m *Manager) SetFallback(name string) {
 	m.fallback = name
 }

+// LoadProvidersFromDB 从数据库加载所有激活的 providers
+func (m *Manager) LoadProvidersFromDB(ctx context.Context) error {
+	if m.pool == nil {
+		return fmt.Errorf("database pool not set")
+	}
+
+	rows, err := m.pool.Query(ctx, `
+		SELECT id, name, base_url, api_key_encrypted, models, config
+		FROM model_providers
+		WHERE is_active = true
+		ORDER BY priority DESC, created_at
+	`)
+	if err != nil {
+		return fmt.Errorf("query providers: %w", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var (
+			id, name, baseURL, apiKey string
+			modelsJSON, configJSON    []byte
+		)
+		if err := rows.Scan(&id, &name, &baseURL, &apiKey, &modelsJSON, &configJSON); err != nil {
+			return fmt.Errorf("scan provider: %w", err)
+		}
+
+		var config map[string]any
+		if err := json.Unmarshal(configJSON, &config); err != nil {
+			return fmt.Errorf("unmarshal config: %w", err)
+		}
+
+		// 根据 config.provider 类型创建对应的 provider
+		providerType, _ := config["provider"].(string)
+		if providerType == "" {
+			providerType = "openai" // 默认 OpenAI 兼容
+		}
+
+		var provider Provider
+		switch providerType {
+		case "openai":
+			provider = NewOpenAIProvider(apiKey, baseURL, "")
+		case "anthropic":
+			provider = NewAnthropicProvider(apiKey, baseURL, "")
+		default:
+			return fmt.Errorf("unsupported provider type: %s", providerType)
+		}
+
+		// 使用 provider ID 作为 key
+		m.Register(id, provider)
+
+		// 缓存
+		m.cacheMu.Lock()
+		m.cache[id] = providerCacheEntry{
+			provider:  provider,
+			updatedAt: time.Now(),
+		}
+		m.cacheMu.Unlock()
+	}
+
+	return rows.Err()
+}
+
+// GetActiveProvider 获取优先级最高的激活 provider
+func (m *Manager) GetActiveProvider(ctx context.Context) (Provider, error) {
+	if m.pool == nil {
+		// 如果没有数据库连接，使用注册的 fallback
+		if p, ok := m.providers[m.fallback]; ok {
+			return p, nil
+		}
+		return nil, fmt.Errorf("no active provider")
+	}
+
+	// 从数据库获取优先级最高的激活 provider
+	var id, baseURL, apiKey string
+	var configJSON []byte
+	err := m.pool.QueryRow(ctx, `
+		SELECT id, base_url, api_key_encrypted, config
+		FROM model_providers
+		WHERE is_active = true
+		ORDER BY priority DESC, created_at
+		LIMIT 1
+	`).Scan(&id, &baseURL, &apiKey, &configJSON)
+	if err != nil {
+		return nil, fmt.Errorf("query active provider: %w", err)
+	}
+
+	// 检查缓存
+	m.cacheMu.RLock()
+	if entry, ok := m.cache[id]; ok && time.Since(entry.updatedAt) < m.cacheTTL {
+		m.cacheMu.RUnlock()
+		return entry.provider, nil
+	}
+	m.cacheMu.RUnlock()
+
+	// 创建新的 provider
+	var config map[string]any
+	if err := json.Unmarshal(configJSON, &config); err != nil {
+		return nil, fmt.Errorf("unmarshal config: %w", err)
+	}
+
+	providerType, _ := config["provider"].(string)
+	if providerType == "" {
+		providerType = "openai"
+	}
+
+	var provider Provider
+	switch providerType {
+	case "openai":
+		provider = NewOpenAIProvider(apiKey, baseURL, "")
+	case "anthropic":
+		provider = NewAnthropicProvider(apiKey, baseURL, "")
+	default:
+		return nil, fmt.Errorf("unsupported provider type: %s", providerType)
+	}
+
+	// 更新缓存
+	m.cacheMu.Lock()
+	m.cache[id] = providerCacheEntry{
+		provider:  provider,
+		updatedAt: time.Now(),
+	}
+	m.cacheMu.Unlock()
+
+	return provider, nil
+}
+
 func (m *Manager) GetProvider(name string) (Provider, error) {
 	if p, ok := m.providers[name]; ok {
 		return p, nil
@@ -43,20 +189,12 @@ func (m *Manager) GetProvider(name string) (Provider, error) {
 }

 // Chat performs a blocking chat completion using the specified provider.
-func (m *Manager) Chat(ctx context.Context, providerName string, req *ChatRequest) (*ChatResponse, error) {
-	provider, err := m.GetProvider(providerName)
-	if err != nil {
-		return nil, err
-	}
+func (m *Manager) Chat(ctx context.Context, provider Provider, req *ChatRequest) (*ChatResponse, error) {
 	return provider.ChatCompletion(ctx, req)
 }

 // ChatStream performs a streaming chat and returns the raw SSE body.
-func (m *Manager) ChatStream(ctx context.Context, providerName string, req *ChatRequest) (io.ReadCloser, error) {
-	provider, err := m.GetProvider(providerName)
-	if err != nil {
-		return nil, err
-	}
+func (m *Manager) ChatStream(ctx context.Context, provider Provider, req *ChatRequest) (io.ReadCloser, error) {
 	req.Stream = true
 	return provider.ChatStream(ctx, req)
 }