feat: 添加请求追踪中间件并支持查询过期订阅

添加请求追踪中间件以记录请求和响应内容
在用户订阅查询中新增includeExpired参数支持查询历史记录
完善配置系统以支持float64类型默认值解析

internal/middleware/traceMiddleware.go

@@ -1,8 +1,10 @@
 package middleware
 
 import (
+	"bytes"
 	"context"
 	"fmt"
+	"io"
 	"net/http"
 	"strings"
 
@@ -18,6 +20,17 @@ import (
 	"github.com/perfect-panel/server/pkg/trace"
 )
 
+// bodyLogWriter is a wrapper for gin.ResponseWriter to capture response body
+type bodyLogWriter struct {
+	gin.ResponseWriter
+	body *bytes.Buffer
+}
+
+func (w bodyLogWriter) Write(b []byte) (int, error) {
+	w.body.Write(b)
+	return w.ResponseWriter.Write(b)
+}
+
 // statusByWriter returns a span status code and message for an HTTP status code
 // value returned by a server. Status codes in the 400-499 range are not
 // returned as errors.
@@ -59,6 +72,13 @@ func TraceMiddleware(_ *svc.ServiceContext) func(ctx *gin.Context) {
 		ctx := c.Request.Context()
 		tracer := trace.TracerFromContext(ctx)
 
+		// Capture Request Body
+		var reqBody []byte
+		if c.Request.Body != nil {
+			reqBody, _ = io.ReadAll(c.Request.Body)
+			c.Request.Body = io.NopCloser(bytes.NewBuffer(reqBody)) // Restore body
+		}
+
 		spanName := c.FullPath()
 		method := c.Request.Method
 
@@ -78,13 +98,39 @@ func TraceMiddleware(_ *svc.ServiceContext) func(ctx *gin.Context) {
 			attribute.String("http.request_id", requestId),
 			semconv.HTTPRouteKey.String(c.FullPath()),
 		)
+
+		// Record Request Body (limit to 1MB)
+		if len(reqBody) > 0 {
+			limit := 1048576
+			if len(reqBody) > limit {
+				span.SetAttributes(attribute.String("http.request.body", string(reqBody[:limit])+"...(truncated)"))
+			} else {
+				span.SetAttributes(attribute.String("http.request.body", string(reqBody)))
+			}
+		}
+
 		// context with request host
 		ctx = context.WithValue(ctx, constant.CtxKeyRequestHost, c.Request.Host)
 		// restructure context
 		c.Request = c.Request.WithContext(ctx)
 
+		// Wrap ResponseWriter to capture Response Body
+		blw := &bodyLogWriter{body: bytes.NewBufferString(""), ResponseWriter: c.Writer}
+		c.Writer = blw
+
 		c.Next()
 
+		// Record Response Body (limit to 1MB)
+		respBody := blw.body.String()
+		if len(respBody) > 0 {
+			limit := 1048576
+			if len(respBody) > limit {
+				span.SetAttributes(attribute.String("http.response.body", respBody[:limit]+"...(truncated)"))
+			} else {
+				span.SetAttributes(attribute.String("http.response.body", respBody))
+			}
+		}
+
 		// handle response related attributes
 		status := c.Writer.Status()
 		span.SetStatus(statusByWriter(status))
@@ -97,7 +143,5 @@ func TraceMiddleware(_ *svc.ServiceContext) func(ctx *gin.Context) {
 				span.RecordError(err.Err)
 			}
 		}
-
-		span.SetAttributes(semconv.HTTPResponseBodySizeKey.Int(c.Writer.Size()))
 	}
 }