feat: 实现 FallbackStore 会话存储降级保护
- 新增 session/fallback_store.go,包装 RedisStore + MemoryStore 双后端 - 后台 goroutine 周期性 ping Redis,自动降级/恢复 - Store 接口新增 Metrics() 方法,MemoryStore/RedisStore/FallbackStore 均已实现 - deps_core.go 改造为始终创建 MemoryStore 兜底,Redis 启用时包装为 FallbackStore - Manager 新增 GetStoreMetrics() 暴露存储状态
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@ -40,17 +40,21 @@ func buildDepsCore(db *gorm.DB, cfg *config.Config, siteSettings *config.SiteSet
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idleTimeout := time.Duration(cfg.Session.IdleTimeout) * time.Minute
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rememberTimeout := time.Duration(cfg.Session.RememberTimeout) * time.Minute
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cleanupInterval := time.Duration(cfg.Session.CleanupInterval) * time.Second
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// 总是创建 MemoryStore 作为兜底
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memStore := session.NewMemoryStore(idleTimeout, rememberTimeout)
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memStore.StartCleanup(cleanupInterval)
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var sessionStore session.Store
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if cfg.Redis.Enabled && redisClient != nil {
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// Redis 模式(生产环境推荐)
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sessionStore = session.NewRedisStore(redisClient, idleTimeout, rememberTimeout)
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log.Println("[Router] 会话存储: Redis")
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// Redis 模式 + 自动降级保护
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redisStore := session.NewRedisStore(redisClient, idleTimeout, rememberTimeout)
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sessionStore = session.NewFallbackStore(redisStore, memStore, cleanupInterval)
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log.Println("[Router] 会话存储: Redis(带内存降级保护)")
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} else {
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// 内存模式(开发/单实例)
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memStore := session.NewMemoryStore(idleTimeout, rememberTimeout)
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memStore.StartCleanup(time.Duration(cfg.Session.CleanupInterval) * time.Second)
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// 纯内存模式
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sessionStore = memStore
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log.Println("[Router] 会话存储: 内存")
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}
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