draft

backend/internal/api/middleware/body_cache.go

@@ -0,0 +1,21 @@
+package middleware
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/gin-gonic/gin"
+)
+
+// CacheBody 缓存 request body（body 只能读一次，中间件提前读取并缓存）
+func CacheBody() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		body, err := io.ReadAll(c.Request.Body)
+		if err != nil {
+			body = []byte{}
+		}
+		c.Request.Body = io.NopCloser(bytes.NewBuffer(body))
+		c.Set("raw_body", body)
+		c.Next()
+	}
+}