'init'

sc-lktx-backend/internal/common/middleware/cors.go

@@ -0,0 +1,25 @@
+// 中间件：Gin 的中间件是 func(*gin.Context)，通过 c.Next() 控制执行链
+// 执行顺序：请求进入 → 中间件1(c.Next前) → 中间件2(c.Next前) → Handler → 中间件2(c.Next后) → 中间件1(c.Next后) → 响应
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// CORS 跨域中间件，允许 H5 调试时跨域访问
+func CORS() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Header("Access-Control-Allow-Origin", "*")
+		c.Header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
+		c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		c.Header("Access-Control-Expose-Headers", "Content-Length, Content-Type")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+		c.Next()
+	}
+}