improve path exclusion rule

Signed-off-by: hongming <talonwan@yunify.com>

pkg/apigateway/caddy-plugin/internal/exclusion_rule.go

@@ -0,0 +1,32 @@
+/*
+ *
+ * Copyright 2019 The KubeSphere Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * /
+ */
+
+package internal
+
+import "net/http"
+
+const AllMethod = "*"
+
+var HttpMethods = []string{AllMethod, http.MethodPost, http.MethodDelete,
+	http.MethodPatch, http.MethodPut, http.MethodGet, http.MethodOptions, http.MethodConnect}
+
+// Path exclusion rule
+type ExclusionRule struct {
+	Method string
+	Path   string
+}