create and move middlewares to seperate folder

web/middleware/domainValidator.go

@@ -0,0 +1,21 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func DomainValidatorMiddleware(domain string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		host := strings.Split(c.Request.Host, ":")[0]
+
+		if host != domain {
+			c.AbortWithStatus(http.StatusForbidden)
+			return
+		}
+
+		c.Next()
+	}
+}

web/middleware/redirect.go

@@ -0,0 +1,34 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func RedirectMiddleware(basePath string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Redirect from old '/xui' path to '/panel'
+		redirects := map[string]string{
+			"panel/API": "panel/api",
+			"xui/API":   "panel/api",
+			"xui":       "panel",
+		}
+
+		path := c.Request.URL.Path
+		for from, to := range redirects {
+			from, to = basePath+from, basePath+to
+
+			if strings.HasPrefix(path, from) {
+				newPath := to + path[len(from):]
+
+				c.Redirect(http.StatusMovedPermanently, newPath)
+				c.Abort()
+				return
+			}
+		}
+
+		c.Next()
+	}
+}