docs: 完善日志追踪文档
This commit is contained in:
@@ -8,11 +8,11 @@ import (
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"testing"
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"testing"
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"time"
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"time"
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"context"
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"github.com/gin-gonic/gin"
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"github.com/gin-gonic/gin"
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"github.com/gorilla/websocket"
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"github.com/gorilla/websocket"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/stretchr/testify/require"
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"context"
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"github.com/hhs/camtalk/internal/auth"
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"github.com/hhs/camtalk/internal/auth"
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"github.com/hhs/camtalk/internal/config"
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"github.com/hhs/camtalk/internal/config"
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@@ -221,9 +221,9 @@ func TestWS_QueryFullFlow(t *testing.T) {
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imageB64 := base64.StdEncoding.EncodeToString([]byte("fake-image-data"))
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imageB64 := base64.StdEncoding.EncodeToString([]byte("fake-image-data"))
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mock := &MockOrchestrator{
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mock := &MockOrchestrator{
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STTResult: "你好,世界",
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STTResult: "你好,世界",
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LLMDeltas: []string{"你好", ",世界!"},
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LLMDeltas: []string{"你好", ",世界!"},
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TTSAudios: []string{base64.StdEncoding.EncodeToString([]byte("mp3-data-1")), base64.StdEncoding.EncodeToString([]byte("mp3-data-2"))},
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TTSAudios: []string{base64.StdEncoding.EncodeToString([]byte("mp3-data-1")), base64.StdEncoding.EncodeToString([]byte("mp3-data-2"))},
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}
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}
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srv, wsURL := setupTestServer(t, mock)
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srv, wsURL := setupTestServer(t, mock)
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@@ -332,7 +332,7 @@ func TestWS_UnknownMessageType(t *testing.T) {
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err := conn.WriteJSON(map[string]string{"type": "unknown_type"})
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err := conn.WriteJSON(map[string]string{"type": "unknown_type"})
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require.NoError(t, err)
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require.NoError(t, err)
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errMsg := readJSON(t, conn)
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errMsg := readJSON(t, conn)
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assert.Equal(t, "error", errMsg["type"])
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assert.Equal(t, "error", errMsg["type"])
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assert.Equal(t, "INVALID_MESSAGE", errMsg["code"])
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assert.Equal(t, "INVALID_MESSAGE", errMsg["code"])
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assert.Contains(t, errMsg["message"], "unknown message type")
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assert.Contains(t, errMsg["message"], "unknown message type")
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@@ -642,7 +642,7 @@ func TestWS_AuthExpiredToken(t *testing.T) {
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Server: config.ServerConfig{HeartbeatInterval: 30, HeartbeatTimeout: 60},
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Server: config.ServerConfig{HeartbeatInterval: 30, HeartbeatTimeout: 60},
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Session: config.SessionConfig{MaxHistory: 20},
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Session: config.SessionConfig{MaxHistory: 20},
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}
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}
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r.GET("/ws", ServeWS(sessionMgr, &MockOrchestrator{}, cfg, tokenMgr, nil))
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r.GET("/ws", ServeWS(sessionMgr, &MockOrchestrator{}, cfg, tokenMgr, nil, nil))
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srv := httptest.NewServer(r)
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srv := httptest.NewServer(r)
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defer srv.Close()
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defer srv.Close()
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399
docs/13-日志追踪.md
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399
docs/13-日志追踪.md
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@@ -0,0 +1,399 @@
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# 日志追踪系统
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## 概述
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CamTalk 全链路日志追踪系统,通过统一的 trace ID 机制,将 REST API 和 WebSocket 两大入口的所有日志串联起来,实现分布式环境下的请求链路可观测性。
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**核心目标**:
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- 统一 trace ID 贯穿 REST/WebSocket 两大入口
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- 所有日志自动附加 trace_id/request_id/session_id
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- 保护用户隐私,敏感文本截断或降级
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- 支持按 trace_id 快速定位完整请求链路
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## Trace ID 作用域
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| 标识 | 作用域 | 生成时机 | 用途 |
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|-----|--------|---------|------|
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| `trace_id` | **连接级**(整个 WebSocket 生命周期)<br/>**请求级**(单次 REST 请求) | REST: 中间件生成<br/>WebSocket: 升级时生成 | 关联同一连接/请求的所有日志 |
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| `session_id` | 会话级(对话上下文存储) | ServeWS 时生成 | 标识会话存储 |
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| `request_id` | 查询级(单次 WebSocket 查询) | 客户端每次查询传入 | 区分同一连接的不同查询 |
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**WebSocket 场景示例**:用户打开页面建立 WebSocket,发起 3 次对话查询:
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```
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连接建立 trace_id=01J5AAA session_id=uuid-123
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├─ 查询1 trace_id=01J5AAA request_id=req-001 (问天气)
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├─ 查询2 trace_id=01J5AAA request_id=req-002 (问新闻)
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└─ 查询3 trace_id=01J5AAA request_id=req-003 (问股票)
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```
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**REST 场景示例**:
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```
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POST /api/auth/login trace_id=01J5BBB request_id=01J5BBB
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GET /api/conversations trace_id=01J5CCC request_id=01J5CCC
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```
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## 核心组件
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```mermaid
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graph TB
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subgraph trace包["trace 包"]
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ID["id.go<br/>ULID 生成器"]
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CTX["context.go<br/>context key 管理"]
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LOG["logger.go<br/>context-aware logger"]
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MW["middleware.go<br/>Gin trace 中间件"]
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end
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subgraph logger包["logger 包"]
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GINLOG["middleware.go<br/>Gin 请求日志"]
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GINREC["GinRecovery<br/>panic 恢复"]
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end
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subgraph 入口层["入口层"]
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REST["REST API<br/>trace 中间件注入"]
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WS["WebSocket<br/>ServeWS 注入"]
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end
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subgraph 业务层["业务层"]
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HANDLER["Handler"]
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ADAPTER["Eino Adapter"]
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NODES["Eino Nodes"]
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end
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ID --> MW
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CTX --> LOG
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LOG --> HANDLER
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LOG --> ADAPTER
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LOG --> NODES
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MW --> REST
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GINLOG --> REST
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WS --> LOG
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```
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### trace/id.go — ULID 生成器
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使用 ULID(Universally Unique Lexicographically Sortable Identifier)作为 trace ID:
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- 时间排序:前 48 位是毫秒时间戳,天然按时间排序
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- 唯一性:后 80 位随机数,冲突概率极低
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- 并发安全:使用 `crypto/rand` + `sync.Pool` 复用 entropy 对象
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```go
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package trace
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import (
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cryptorand "crypto/rand"
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"sync"
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"time"
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"github.com/oklog/ulid/v2"
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)
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var entropyPool = sync.Pool{
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New: func() interface{} {
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return ulid.Monotonic(cryptorand.Reader, 0)
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},
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}
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// GenerateTraceID 生成并发安全的 ULID trace ID
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func GenerateTraceID() string {
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entropy := entropyPool.Get().(*ulid.MonotonicEntropy)
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defer entropyPool.Put(entropy)
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return ulid.MustNew(ulid.Timestamp(time.Now()), entropy).String()
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}
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```
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### trace/context.go — Context Key 管理
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统一管理所有 trace 相关的 context key:
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```go
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package trace
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import "context"
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type traceIDKey struct{}
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type requestIDKey struct{}
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type sessionIDKey struct{}
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// WithTraceID 将 trace ID 注入 context
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func WithTraceID(ctx context.Context, traceID string) context.Context {
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return context.WithValue(ctx, traceIDKey{}, traceID)
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}
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func GetTraceID(ctx context.Context) string {
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if v, ok := ctx.Value(traceIDKey{}).(string); ok {
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return v
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}
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return ""
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}
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// 类似定义 WithRequestID/GetRequestID 和 WithSessionID/GetSessionID
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```
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### trace/logger.go — Context-Aware Logger
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自动从 context 提取 trace 字段并附加到日志:
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```go
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package trace
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import (
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"context"
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"github.com/hhs/camtalk/internal/logger"
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"go.uber.org/zap"
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)
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// FromContext 返回自动附加 trace_id/request_id/session_id 的 logger
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func FromContext(ctx context.Context) *zap.SugaredLogger {
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log := logger.Log
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if traceID := GetTraceID(ctx); traceID != "" {
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log = log.With("trace_id", traceID)
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}
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if requestID := GetRequestID(ctx); requestID != "" {
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log = log.With("request_id", requestID)
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}
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if sessionID := GetSessionID(ctx); sessionID != "" {
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log = log.With("session_id", sessionID)
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}
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return log
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}
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```
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**使用模式对比**:
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```go
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// Before: 手动传递字段
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logger.Log.Infow("message", "session", sessionID, "request", requestID)
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// After: 自动附加
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trace.FromContext(ctx).Infow("message")
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```
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### trace/middleware.go — Gin Trace 中间件
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为 REST 请求生成 trace ID 并注入 context:
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```go
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package trace
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import "github.com/gin-gonic/gin"
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// TraceMiddleware 为每个 HTTP 请求生成 trace ID 并注入 context
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func TraceMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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traceID := GenerateTraceID()
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ctx := WithTraceID(c.Request.Context(), traceID)
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ctx = WithRequestID(ctx, traceID) // REST: trace_id == request_id
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c.Request = c.Request.WithContext(ctx)
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c.Header("X-Trace-ID", traceID) // 返回给客户端用于排查
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c.Next()
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}
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}
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```
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### logger/middleware.go — 请求日志与 Panic 恢复
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记录所有 HTTP 请求的 method/path/status/latency:
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|
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```go
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package logger
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|
import (
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"time"
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"github.com/gin-gonic/gin"
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"github.com/hhs/camtalk/internal/trace"
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)
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// GinLogger 记录每个 HTTP 请求的基础信息
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func GinLogger() gin.HandlerFunc {
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return func(c *gin.Context) {
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|
start := time.Now()
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path := c.Request.URL.Path
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|
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c.Next()
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latency := time.Since(start).Milliseconds()
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status := c.Writer.Status()
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log := trace.FromContext(c.Request.Context())
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|
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|
switch {
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case status >= 500:
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log.Errorw("request completed", "method", c.Request.Method,
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"path", path, "status", status, "latency_ms", latency)
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case status >= 400:
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log.Warnw("request completed", "method", c.Request.Method,
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"path", path, "status", status, "latency_ms", latency)
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default:
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log.Infow("request completed", "method", c.Request.Method,
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"path", path, "status", status, "latency_ms", latency)
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|
}
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|
}
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|
}
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|
|
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// GinRecovery 自定义 panic 恢复中间件
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|
func GinRecovery() gin.HandlerFunc {
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|
return func(c *gin.Context) {
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|
defer func() {
|
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|
if err := recover(); err != nil {
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|
log := trace.FromContext(c.Request.Context())
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|
log.Errorw("panic recovered", "error", err,
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|
"path", c.Request.URL.Path, "method", c.Request.Method)
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|
c.AbortWithStatus(500)
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|
}
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|
}()
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|
c.Next()
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|
}
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|
}
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|
```
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|
|
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|
## 中间件注册顺序
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|
|
||||||
|
在 `cmd/server/main.go` 中,三层中间件按顺序注册:
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|
|
||||||
|
```go
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|
r := gin.New()
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|
r.Use(trace.TraceMiddleware()) // 第一层:生成 trace ID
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|
r.Use(logger.GinLogger()) // 第二层:记录请求
|
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|
r.Use(logger.GinRecovery()) // 第三层:panic 恢复
|
||||||
|
```
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|
|
||||||
|
## 日志输出示例
|
||||||
|
|
||||||
|
### REST 请求
|
||||||
|
|
||||||
|
```json
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||||||
|
{
|
||||||
|
"level": "info",
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||||||
|
"ts": 1718956800.123,
|
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|
"msg": "login success",
|
||||||
|
"trace_id": "01J5A2B3C4D5E6F7G8H9J0K1M",
|
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|
"request_id": "01J5A2B3C4D5E6F7G8H9J0K1M",
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|
"username": "test_user"
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|
}
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||||||
|
```
|
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|
|
||||||
|
### WebSocket 查询链路
|
||||||
|
|
||||||
|
```json
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|
// 1. 查询接收
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|
{"level":"info", "trace_id":"01J5XXX", "session_id":"abc-123", "request_id":"req-456", "msg":"query received"}
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|
|
||||||
|
// 2. STT 完成(Debug)
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|
{"level":"debug", "trace_id":"01J5XXX", "session_id":"abc-123", "request_id":"req-456", "msg":"stt recognition completed", "text_len":45}
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|
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|
// 3. LLM 完成
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|
{"level":"info", "trace_id":"01J5XXX", "session_id":"abc-123", "request_id":"req-456", "msg":"llm generation completed", "tokens":150}
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|
|
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|
// 4. Pipeline 完成
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|
{"level":"info", "trace_id":"01J5XXX", "session_id":"abc-123", "request_id":"req-456", "msg":"query processing completed", "latency_ms":2340}
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|
```
|
||||||
|
|
||||||
|
## 日志查询操作
|
||||||
|
|
||||||
|
### 按 trace_id 查询完整链路
|
||||||
|
|
||||||
|
**本地开发(文件日志)**:
|
||||||
|
```bash
|
||||||
|
# 查看完整链路
|
||||||
|
grep 'trace_id":"01J5XXX"' backend.log | jq .
|
||||||
|
|
||||||
|
# 查看链路时间线
|
||||||
|
grep 'trace_id":"01J5XXX"' backend.log | jq -r '[.ts, .msg] | @tsv'
|
||||||
|
```
|
||||||
|
|
||||||
|
**Grafana Loki**:
|
||||||
|
```logql
|
||||||
|
{app="camtalk-backend"}
|
||||||
|
|= "trace_id=01J5XXX"
|
||||||
|
| json
|
||||||
|
| line_format "{{.ts}} [{{.level}}] {{.msg}}"
|
||||||
|
```
|
||||||
|
|
||||||
|
### 查询慢请求(延迟 > 5s)
|
||||||
|
|
||||||
|
```logql
|
||||||
|
{app="camtalk-backend"}
|
||||||
|
| json
|
||||||
|
| msg="query processing completed"
|
||||||
|
| latency_ms > 5000
|
||||||
|
```
|
||||||
|
|
||||||
|
### 查询错误率
|
||||||
|
|
||||||
|
```logql
|
||||||
|
sum(count_over_time({app="camtalk-backend"} | json | level="error" [5m]))
|
||||||
|
```
|
||||||
|
|
||||||
|
## 敏感内容处理规范
|
||||||
|
|
||||||
|
### 完全禁止记录
|
||||||
|
|
||||||
|
- 用户明文密码
|
||||||
|
- JWT token 完整内容(仅记录 "token_present: true")
|
||||||
|
- API Key 完整值(仅记录前 8 字符 + "...")
|
||||||
|
|
||||||
|
### 截断后记录(最多 50 字符)
|
||||||
|
|
||||||
|
- 用户输入文本 → `text_preview`
|
||||||
|
- LLM 生成文本 → `text_preview`
|
||||||
|
- STT 识别文本 → `text_preview`
|
||||||
|
|
||||||
|
**示例**:
|
||||||
|
```go
|
||||||
|
log.Debugw("stt recognition completed",
|
||||||
|
"text_len", len(text),
|
||||||
|
"text_preview", util.Truncate(text, 50))
|
||||||
|
```
|
||||||
|
|
||||||
|
### 仅记录长度/大小
|
||||||
|
|
||||||
|
- 图片数据 → `image_size_bytes`
|
||||||
|
- 音频数据 → `audio_size_bytes`
|
||||||
|
|
||||||
|
### 降级为 Debug 级别
|
||||||
|
|
||||||
|
所有包含用户文本预览的日志,生产环境默认不输出。
|
||||||
|
|
||||||
|
## 日志级别使用准则
|
||||||
|
|
||||||
|
| 场景 | 级别 | 示例 |
|
||||||
|
|-----|------|-----|
|
||||||
|
| 请求生命周期里程碑 | Info | `"query received"`, `"pipeline completed"` |
|
||||||
|
| 中间步骤详情 | Debug | `"stt recognition completed"`, `"history assembled"` |
|
||||||
|
| 敏感内容相关 | Debug | 所有包含用户文本的日志 |
|
||||||
|
| 预期内的失败 | Warn | `"login failed"`, `"rate limited"` |
|
||||||
|
| 系统错误 | Error | `"database query failed"`, `"tts synthesis failed"` |
|
||||||
|
| 严重故障 | Error + stack | `"panic recovered"` |
|
||||||
|
|
||||||
|
## 编码规范
|
||||||
|
|
||||||
|
1. **日志语言**:统一使用英文
|
||||||
|
2. **结构化**:始终使用 `Infow`/`Errorw`/`Warnw`/`Debugw`
|
||||||
|
3. **Context 传递**:使用 `trace.FromContext(ctx)` 而非直接引用 `logger.Log`
|
||||||
|
4. **敏感内容**:禁止在 Info 及以上级别记录用户文本原文
|
||||||
|
5. **错误日志**:采用"调用方记录"原则,底层函数 return wrapped error
|
||||||
|
6. **级别约定**:
|
||||||
|
- `Debug`:内部状态跟踪、开发调试信息
|
||||||
|
- `Info`:请求/连接生命周期、关键操作里程碑
|
||||||
|
- `Warn`:可降级异常(Redis 故障、限流触发)
|
||||||
|
- `Error`:影响用户的操作失败
|
||||||
|
- `Fatal`:仅启动阶段不可恢复错误
|
||||||
|
|
||||||
|
## 性能考量
|
||||||
|
|
||||||
|
### FromContext 开销
|
||||||
|
|
||||||
|
- 有 trace_id:~200-300 ns/op
|
||||||
|
- 无 trace_id:~10-20 ns/op(仅返回全局 logger)
|
||||||
|
- 1000 QPS 场景额外开销约 0.2ms,可接受
|
||||||
|
|
||||||
|
### ULID 生成吞吐量
|
||||||
|
|
||||||
|
- 单线程:~500k ops/s
|
||||||
|
- 并发 8 线程:~2M ops/s
|
||||||
|
|
||||||
|
**验收标准**:1000 QPS 下,trace 系统开销 < 1% CPU,< 0.5ms P99 延迟。
|
||||||
@@ -17,6 +17,8 @@ CamTalk 是一款多模态实时 AI 视觉对话助手。用户通过摄像头
|
|||||||
| [09-情景切换](09-情景切换.md) | 多情景 AI 角色扮演系统(面试官、英语老师、辩论对手、翻译员、自由对话) |
|
| [09-情景切换](09-情景切换.md) | 多情景 AI 角色扮演系统(面试官、英语老师、辩论对手、翻译员、自由对话) |
|
||||||
| [10-鉴权体系](10-鉴权体系.md) | JWT 双 token 轮转认证、bcrypt 密码哈希、Refresh Token Rotation、安全机制 |
|
| [10-鉴权体系](10-鉴权体系.md) | JWT 双 token 轮转认证、bcrypt 密码哈希、Refresh Token Rotation、安全机制 |
|
||||||
| [11-令牌桶限流](11-令牌桶限流.md) | 令牌桶限流算法、内存/Redis 双实现、Gin 中间件、WebSocket query 限流 |
|
| [11-令牌桶限流](11-令牌桶限流.md) | 令牌桶限流算法、内存/Redis 双实现、Gin 中间件、WebSocket query 限流 |
|
||||||
|
| [12-自定义情景](12-自定义情景.md) | 用户自定义情景的完整设计 |
|
||||||
|
| [13-日志追踪](13-日志追踪.md) | 全链路日志追踪系统(trace ID、敏感内容保护、日志规范) |
|
||||||
|
|
||||||
|
|
||||||
## 推荐阅读顺序
|
## 推荐阅读顺序
|
||||||
@@ -30,6 +32,8 @@ CamTalk 是一款多模态实时 AI 视觉对话助手。用户通过摄像头
|
|||||||
7. **09-情景切换** — 多情景 AI 角色扮演系统
|
7. **09-情景切换** — 多情景 AI 角色扮演系统
|
||||||
8. **10-鉴权体系** — 认证授权机制详细设计
|
8. **10-鉴权体系** — 认证授权机制详细设计
|
||||||
9. **11-令牌桶限流** — 速率限制设计
|
9. **11-令牌桶限流** — 速率限制设计
|
||||||
|
10. **12-自定义情景** — 用户自定义情景
|
||||||
|
11. **13-日志追踪** — 全链路日志追踪(trace ID、敏感内容保护、开发参考)
|
||||||
|
|
||||||
## 功能扩展方向
|
## 功能扩展方向
|
||||||
|
|
||||||
|
|||||||
Reference in New Issue
Block a user