feat: add request-validation plugin (#700)

Signed-off-by: sjcsjc123 <1401189096@qq.com>

test/e2e/conformance/tests/go-wasm-request-validation.yaml

@@ -0,0 +1,97 @@
+# Copyright (c) 2022 Alibaba Group Holding Ltd.
+#
+# 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.
+
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: httproute-app-root
+  namespace: higress-conformance-infra
+spec:
+  ingressClassName: higress
+  rules:
+    - host: "foo.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/foo"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
+apiVersion: extensions.higress.io/v1alpha1
+kind: WasmPlugin
+metadata:
+  name: request-validation
+  namespace: higress-system
+spec:
+  defaultConfig:
+    header_schema:
+      type: object
+      required:
+        - enum_payload
+      properties:
+        enum_payload:
+            type: string
+            enum:
+              - "enum_string_1"
+              - "enum_string_2"
+            default: "enum_string_1"
+    body_schema:
+      type: object
+      required:
+        - enum_payload
+        - bool_payload
+        - integer_payload
+        - string_payload
+        - regex_payload
+        - array_payload
+      properties:
+        enum_payload:
+          type: string
+          enum:
+            - "enum_string_1"
+            - "enum_string_2"
+          default: "enum_string_1"
+        bool_payload:
+          type: boolean
+          default: true
+        integer_payload:
+          type: integer
+          minimum: 1
+          maximum: 65535
+        string_payload:
+          type: string
+          minLength: 2
+          maxLength: 32
+        regex_payload:
+          type: string
+          minLength: 1
+          maxLength: 32
+          pattern: "^[a-zA-Z0-9]+$"
+        array_payload:
+          type: array
+          minItems: 2
+          items:
+            type: integer
+            minimum: 200
+            maximum: 599
+          uniqueItems: true
+          default: [200, 302]
+    rejected_code: 403
+    rejected_msg: "customize reject message"
+    enable_swagger: true
+    enable_oas3: false
+  url: file:///opt/plugins/wasm-go/extensions/request-validation/plugin.wasm