refactor(metrics): Update metrics collection with atomic operations and improved type safety

- Replace manual increment methods with atomic store operations in PathMetrics
- Enhance GetStats method to handle different metric types and convert to value slice
- Update RequestLog JSON tags for consistent naming
- Add SafePathMetrics conversion for mixed pointer and value slices
- Improve type safety and consistency in metrics tracking

internal/metrics/collector.go

@@ -161,12 +161,12 @@ func (c *Collector) RecordRequest(path string, status int, latency time.Duration
 		newStat := &models.PathMetrics{
 			Path: path,
 		}
-		newStat.AddRequest()
+		newStat.RequestCount.Store(1)
 		if status >= 400 {
-			newStat.AddError()
+			newStat.ErrorCount.Store(1)
 		}
-		newStat.AddLatency(int64(latency))
-		newStat.AddBytes(bytes)
+		newStat.TotalLatency.Store(int64(latency))
+		newStat.BytesTransferred.Store(bytes)
 		c.pathStats.Store(path, newStat)
 	}
 	c.pathStatsMutex.Unlock()
@@ -215,6 +215,8 @@ func (c *Collector) GetStats() map[string]interface{} {
 	c.statusCodeStats.Range(func(key, value interface{}) bool {
 		if counter, ok := value.(*int64); ok {
 			totalRequests += atomic.LoadInt64(counter)
+		} else {
+			totalRequests += value.(int64)
 		}
 		return true
 	})
@@ -247,8 +249,8 @@ func (c *Collector) GetStats() map[string]interface{} {
 			totalLatency := stats.GetTotalLatency()
 			avgLatencyMs := float64(totalLatency) / float64(requestCount) / float64(time.Millisecond)
 			stats.AvgLatency = fmt.Sprintf("%.2fms", avgLatencyMs)
+			pathMetrics = append(pathMetrics, stats)
 		}
-		pathMetrics = append(pathMetrics, stats)
 		return true
 	})
 
@@ -262,6 +264,23 @@ func (c *Collector) GetStats() map[string]interface{} {
 		pathMetrics = pathMetrics[:10]
 	}
 
+	// 转换为值切片
+	pathMetricsValues := make([]models.PathMetrics, len(pathMetrics))
+	for i, metric := range pathMetrics {
+		pathMetricsValues[i] = models.PathMetrics{
+			Path:             metric.Path,
+			AvgLatency:       metric.AvgLatency,
+			RequestCount:     atomic.Int64{},
+			ErrorCount:       atomic.Int64{},
+			TotalLatency:     atomic.Int64{},
+			BytesTransferred: atomic.Int64{},
+		}
+		pathMetricsValues[i].RequestCount.Store(metric.RequestCount.Load())
+		pathMetricsValues[i].ErrorCount.Store(metric.ErrorCount.Load())
+		pathMetricsValues[i].TotalLatency.Store(metric.TotalLatency.Load())
+		pathMetricsValues[i].BytesTransferred.Store(metric.BytesTransferred.Load())
+	}
+
 	// 收集延迟分布
 	latencyDistribution := make(map[string]int64)
 	c.latencyBuckets.Range(func(key, value interface{}) bool {
@@ -296,7 +315,7 @@ func (c *Collector) GetStats() map[string]interface{} {
 		"requests_per_second": requestsPerSecond,
 		"bytes_per_second":    float64(atomic.LoadInt64(&c.totalBytes)) / totalRuntime.Seconds(),
 		"status_code_stats":   statusCodeStats,
-		"top_paths":           pathMetrics,
+		"top_paths":           pathMetricsValues,
 		"recent_requests":     recentRequests,
 		"latency_stats": map[string]interface{}{
 			"min":          fmt.Sprintf("%.2fms", float64(minLatency)/float64(time.Millisecond)),

internal/models/request.go

@@ -7,12 +7,12 @@ import (
 
 // RequestLog 请求日志
 type RequestLog struct {
-	Time      time.Time `json:"time"`
-	Path      string    `json:"path"`
-	Status    int       `json:"status"`
-	Latency   int64     `json:"latency"`
-	BytesSent int64     `json:"bytes_sent"`
-	ClientIP  string    `json:"client_ip"`
+	Time      time.Time `json:"Time"`
+	Path      string    `json:"Path"`
+	Status    int       `json:"Status"`
+	Latency   int64     `json:"Latency"`
+	BytesSent int64     `json:"BytesSent"`
+	ClientIP  string    `json:"ClientIP"`
 }
 
 // RequestQueue 请求队列

internal/models/utils.go

@@ -1,5 +1,9 @@
 package models
 
+import (
+	"sync/atomic"
+)
+
 // SafeStatusCodeStats 安全地将 interface{} 转换为状态码统计
 func SafeStatusCodeStats(v interface{}) map[string]int64 {
 	if v == nil {
@@ -19,6 +23,24 @@ func SafePathMetrics(v interface{}) []PathMetrics {
 	if m, ok := v.([]PathMetrics); ok {
 		return m
 	}
+	if m, ok := v.([]*PathMetrics); ok {
+		result := make([]PathMetrics, len(m))
+		for i, metric := range m {
+			result[i] = PathMetrics{
+				Path:             metric.Path,
+				AvgLatency:       metric.AvgLatency,
+				RequestCount:     atomic.Int64{},
+				ErrorCount:       atomic.Int64{},
+				TotalLatency:     atomic.Int64{},
+				BytesTransferred: atomic.Int64{},
+			}
+			result[i].RequestCount.Store(metric.RequestCount.Load())
+			result[i].ErrorCount.Store(metric.ErrorCount.Load())
+			result[i].TotalLatency.Store(metric.TotalLatency.Load())
+			result[i].BytesTransferred.Store(metric.BytesTransferred.Load())
+		}
+		return result
+	}
 	return []PathMetrics{}
 }