refactor(middleware, monitoring, public): streamline metrics handling and remove top referers display

- Simplified MetricsMiddleware by removing unnecessary comments and focusing on essential request logging.
- Updated RequestLog structure to exclude the Referer field from JSON serialization, enhancing data privacy.
- Removed top referers tracking and associated HTML/CSS elements to declutter the user interface and improve performance.
- Cleaned up CSS styles related to referers for a more streamlined design.

middleware/metrics.go

@@ -15,16 +15,13 @@ func MetricsMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		start := time.Now()
 
-		// 创建自定义的ResponseWriter来捕获状态码
 		rw := &responseWriter{
 			ResponseWriter: w,
 			statusCode:     http.StatusOK,
 		}
 
-		// 处理请求
 		next.ServeHTTP(rw, r)
 
-		// 记录请求数据
 		duration := time.Since(start)
 		monitoring.LogRequest(monitoring.RequestLog{
 			Time:       time.Now().Unix(),
@@ -33,7 +30,6 @@ func MetricsMiddleware(next http.Handler) http.Handler {
 			StatusCode: rw.statusCode,
 			Latency:    float64(duration.Microseconds()) / 1000,
 			IP:         utils.GetRealIP(r),
-			Referer:    r.Referer(),
 		})
 	})
 }

monitoring/metrics.go

@@ -1,10 +1,8 @@
 package monitoring
 
 import (
-	"encoding/json"
 	"runtime"
 	"strings"
-	"sync"
 	"time"
 )
 
@@ -21,9 +19,6 @@ type SystemMetrics struct {
 		HeapAlloc uint64 `json:"heap_alloc"`
 		HeapSys   uint64 `json:"heap_sys"`
 	} `json:"memory_stats"`
-
-	// 热门引用来源
-	TopReferers sync.Map `json:"-"` // 内部使用 sync.Map
 }
 
 type RequestLog struct {
@@ -33,7 +28,7 @@ type RequestLog struct {
 	StatusCode int     `json:"status_code"`
 	Latency    float64 `json:"latency"`
 	IP         string  `json:"ip"`
-	Referer    string  `json:"referer"`
+	Referer    string  `json:"-"`
 }
 
 var (
@@ -41,32 +36,7 @@ var (
 	startTime = time.Now()
 )
 
-func init() {
-	// 定期清理引用来源
-	go func() {
-		ticker := time.NewTicker(5 * time.Minute)
-		for range ticker.C {
-			metrics.TopReferers = sync.Map{} // 直接重置
-		}
-	}()
-}
-
 func LogRequest(log RequestLog) {
-	// 更新引用来源
-	if log.Referer != "direct" {
-		if val, ok := metrics.TopReferers.Load(log.Referer); ok {
-			metrics.TopReferers.Store(log.Referer, val.(int64)+1)
-		} else {
-			metrics.TopReferers.Store(log.Referer, int64(1))
-		}
-	} else {
-		if val, ok := metrics.TopReferers.Load("直接访问"); ok {
-			metrics.TopReferers.Store("直接访问", val.(int64)+1)
-		} else {
-			metrics.TopReferers.Store("直接访问", int64(1))
-		}
-	}
-
 	// 更新平均延迟 (只关心 API 请求)
 	if strings.HasPrefix(log.Path, "/pic/") || strings.HasPrefix(log.Path, "/video/") {
 		metrics.AverageLatency = (metrics.AverageLatency + log.Latency) / 2
@@ -86,22 +56,3 @@ func CollectMetrics() *SystemMetrics {
 
 	return &metrics
 }
-
-// 添加 MarshalJSON 方法来正确序列化 TopReferers
-func (m *SystemMetrics) MarshalJSON() ([]byte, error) {
-	type Alias SystemMetrics
-	referers := make(map[string]int64)
-
-	m.TopReferers.Range(func(key, value interface{}) bool {
-		referers[key.(string)] = value.(int64)
-		return true
-	})
-
-	return json.Marshal(&struct {
-		*Alias
-		TopReferers map[string]int64 `json:"top_referers"`
-	}{
-		Alias:       (*Alias)(m),
-		TopReferers: referers,
-	})
-}

public/css/main.css

@@ -352,38 +352,6 @@ td a:hover {
     color: #2196f3;
 }
 
-.referers-list {
-    margin-top: 15px;
-    display: grid;
-    gap: 8px;
-    width: 100%;
-}
-
-.referer-item {
-    background: rgba(255, 255, 255, 0.05);
-    padding: 10px 15px;
-    border-radius: 6px;
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-}
-
-.referer {
-    color: #999;
-    max-width: 70%;
-    overflow: hidden;
-    text-overflow: ellipsis;
-    white-space: nowrap;
-}
-
-.count {
-    color: #2196f3;
-    font-weight: 500;
-    padding: 2px 8px;
-    background: rgba(33, 150, 243, 0.1);
-    border-radius: 4px;
-}
-
 .error-message {
     background: rgba(255, 0, 0, 0.1);
     color: #ff4444;
@@ -412,10 +380,6 @@ td a:hover {
     .metric-value {
         font-size: 1em;
     }
-    
-    .referer {
-        max-width: 60%;
-    }
 }
 
 .main-title {

public/index.html

@@ -286,24 +286,6 @@
                                 </div>
                             </div>
                         </div>
-
-                        ${Object.keys(data.top_referers).length > 0 ? `
-                            <div class="stats-summary">
-                                <div class="stats-header">
-                                    <h2>🔗 访问来源</h2>
-                                </div>
-                                <div class="referers-list">
-                                    ${Object.entries(data.top_referers)
-                                        .sort(([,a], [,b]) => b - a)
-                                        .map(([referer, count]) => `
-                                            <div class="referer-item">
-                                                <span class="referer">${referer || '直接访问'}</span>
-                                                <span class="count">${count}</span>
-                                            </div>
-                                        `).join('')}
-                                </div>
-                            </div>
-                        ` : ''}
                     </div>
                 `;