新增 Web 浏览端(Go+Vue 报表系统)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/backend/internal/middleware/logger.go

@@ -0,0 +1,46 @@
+package middleware
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"runtime/debug"
+	"time"
+)
+
+func Logger(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		rw := &statusRecorder{ResponseWriter: w, status: http.StatusOK}
+		next.ServeHTTP(rw, r)
+		log.Printf("%s %s %d %s", r.Method, r.URL.Path, rw.status, time.Since(start))
+	})
+}
+
+func Recover(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer func() {
+			if rec := recover(); rec != nil {
+				log.Printf("[panic] %v\n%s", rec, debug.Stack())
+				writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "internal error"})
+			}
+		}()
+		next.ServeHTTP(w, r)
+	})
+}
+
+type statusRecorder struct {
+	http.ResponseWriter
+	status int
+}
+
+func (r *statusRecorder) WriteHeader(code int) {
+	r.status = code
+	r.ResponseWriter.WriteHeader(code)
+}
+
+func writeJSON(w http.ResponseWriter, status int, body any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(body)
+}