first commit

apps/backend/internal/httpapi/logging.go

@@ -0,0 +1,57 @@
+package httpapi
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+)
+
+func requestLogMiddleware(logger *zap.Logger) gin.HandlerFunc {
+	baseLogger := logger
+	if baseLogger == nil {
+		baseLogger = zap.NewNop()
+	}
+
+	return func(c *gin.Context) {
+		startedAt := time.Now()
+		path := c.Request.URL.Path
+		query := c.Request.URL.RawQuery
+
+		c.Next()
+
+		status := c.Writer.Status()
+		latency := time.Since(startedAt)
+		requestID := requestIDFromContext(c)
+
+		if path == "/v1/health" && status < 400 {
+			return
+		}
+
+		fields := []zap.Field{
+			zap.String("requestId", requestID),
+			zap.String("method", c.Request.Method),
+			zap.String("path", path),
+			zap.Int("status", status),
+			zap.Duration("latency", latency),
+			zap.String("clientIP", c.ClientIP()),
+			zap.String("userAgent", c.Request.UserAgent()),
+			zap.Int("responseBytes", c.Writer.Size()),
+		}
+		if query != "" {
+			fields = append(fields, zap.String("query", query))
+		}
+		if len(c.Errors) > 0 {
+			fields = append(fields, zap.String("errors", c.Errors.String()))
+		}
+
+		switch {
+		case status >= 500:
+			baseLogger.Error("http request completed with server error", fields...)
+		case status >= 400:
+			baseLogger.Warn("http request completed with client error", fields...)
+		default:
+			baseLogger.Info("http request completed", fields...)
+		}
+	}
+}