updated implementation of rules

internal/net/http/methods.go

@@ -0,0 +1,20 @@
+package http
+
+import "net/http"
+
+var validMethods = map[string]struct{}{
+	http.MethodGet:     {},
+	http.MethodHead:    {},
+	http.MethodPost:    {},
+	http.MethodPut:     {},
+	http.MethodPatch:   {},
+	http.MethodDelete:  {},
+	http.MethodConnect: {},
+	http.MethodOptions: {},
+	http.MethodTrace:   {},
+}
+
+func IsMethodValid(method string) bool {
+	_, ok := validMethods[method]
+	return ok
+}