refactor(handlers, monitoring): improve API request handling and metrics logging

- Refactored HandleAPIRequest to use a result channel for better error handling and response management.
- Updated metrics logging to directly use the full referer instead of just the main domain, enhancing data accuracy.
- Fixed recent requests display in HTML to correctly format timestamps for better readability.

handlers/handlers.go

@@ -28,7 +28,13 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 10*time.Second)
 	defer cancel()
 
-	done := make(chan struct{})
+	// 创建一个响应通道，用于传递结果
+	type result struct {
+		url string
+		err error
+	}
+	resultChan := make(chan result, 1)
+
 	go func() {
 		start := time.Now()
 		realIP := utils.GetRealIP(r)
@@ -57,7 +63,7 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 				IP:         realIP,
 				Referer:    sourceInfo,
 			})
-			http.NotFound(w, r)
+			resultChan <- result{err: fmt.Errorf("not found")}
 			return
 		}
 
@@ -78,7 +84,7 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 				IP:         realIP,
 				Referer:    sourceInfo,
 			})
-			http.NotFound(w, r)
+			resultChan <- result{err: fmt.Errorf("not found")}
 			return
 		}
 
@@ -94,7 +100,7 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 				IP:         realIP,
 				Referer:    sourceInfo,
 			})
-			http.Error(w, "Failed to fetch content", http.StatusInternalServerError)
+			resultChan <- result{err: err}
 			return
 		}
 
@@ -108,7 +114,7 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 				IP:         realIP,
 				Referer:    sourceInfo,
 			})
-			http.Error(w, "No content available", http.StatusNotFound)
+			resultChan <- result{err: fmt.Errorf("no content available")}
 			return
 		}
 
@@ -136,14 +142,17 @@ func (h *Handlers) HandleAPIRequest(w http.ResponseWriter, r *http.Request) {
 			randomURL,
 		)
 
-		http.Redirect(w, r, randomURL, http.StatusFound)
-
-		done <- struct{}{}
+		resultChan <- result{url: randomURL}
 	}()
 
+	// 等待结果或超时
 	select {
-	case <-done:
-		// 请求成功完成
+	case res := <-resultChan:
+		if res.err != nil {
+			http.Error(w, res.err.Error(), http.StatusInternalServerError)
+			return
+		}
+		http.Redirect(w, r, res.url, http.StatusFound)
 	case <-ctx.Done():
 		http.Error(w, "Request timeout", http.StatusGatewayTimeout)
 	}

monitoring/metrics.go

@@ -3,7 +3,6 @@ package monitoring
 import (
 	"encoding/json"
 	"fmt"
-	"net/url"
 	"runtime"
 	"strings"
 	"sync"
@@ -122,18 +121,9 @@ func LogRequest(log RequestLog) {
 
 	metrics.StatusCodes[log.StatusCode]++
 
-	// 处理 referer，只保留域名
+	// 直接使用完整的 referer
 	if log.Referer != "direct" {
-		if parsedURL, err := url.Parse(log.Referer); err == nil {
-			// 只保留主域名
-			parts := strings.Split(parsedURL.Host, ".")
-			if len(parts) >= 2 {
-				domain := parts[len(parts)-2] + "." + parts[len(parts)-1]
-				metrics.TopReferers[domain]++
-			} else {
-				metrics.TopReferers[parsedURL.Host]++
-			}
-		}
+		metrics.TopReferers[log.Referer]++
 	} else {
 		metrics.TopReferers["直接访问"]++
 	}

public/index.html

@@ -232,7 +232,7 @@
             // 最近请求
             const recentRequestsHtml = metrics.recent_requests.map(req => `
                 <tr>
-                    <td>${new Date(req.time).toLocaleString()}</td>
+                    <td>${new Date(req.time * 1000).toLocaleString()}</td>
                     <td>${req.path}</td>
                     <td>${req.method}</td>
                     <td>${req.status_code}</td>