doc: add request-validation plugin chinese document.

doc/plugins/request-validation.md

@@ -17,7 +17,7 @@
 #
 -->
 
-[Chinese](request-validation-cn.md)
+[Chinese](../zh-cn/plugins/request-validation.md)
 
 # Summary
 - [**Name**](#name)

doc/zh-cn/plugins/request-validation.md

@@ -0,0 +1,151 @@
+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+-->
+
+[English](../../plugins/request-validation.md)
+
+# 目录
+- [**名字**](#名字)
+- [**属性**](#属性)
+- [**如何启用**](#如何启用)
+- [**测试插件**](#测试插件)
+- [**禁用插件**](#禁用插件)
+- [**示例**](#示例)
+
+## 名字
+
+`request-validation` 插件用于提前验证请求向上游转发请求，可以验证请求的 `body` 及 `header` 数据。
+
+该插件使用 `Json Schema` 进行数据验证，有关 `Json Schema` 的更多信息，请参阅 [JSON schema](https://github.com/api7/jsonschema) 。 
+
+
+## 属性
+
+|名称           |必选项          |描述|
+|---------      |--------       |-----------|
+| header_schema |可选           |`header` 数据的 `schema` 数据结构|
+| body_schema   |可选           |`body` 数据的 `schema` 数据结构|
+
+
+## 如何启用
+
+创建一条路由并在该路由上启用 `request-validation` 插件：
+
+```shell
+curl http://127.0.0.1:9080/apisix/admin/routes/5 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
+{
+    "uri": "/get",
+    "plugins": {
+        "request-validation": {
+            "body_schema": {
+                "type": "object",
+                "required": ["required_payload"],
+                "properties": {
+                    "required_payload": {"type": "string"},
+                    "boolean_payload": {"type": "boolean"}
+                }
+            }
+        }
+    },
+    "upstream": {
+    	"type": "roundrobin",
+    	"nodes": {
+        	"127.0.0.1:8080": 1
+    	}
+    }
+}
+```
+
+
+## 测试插件
+
+```shell
+curl --header "Content-Type: application/json" \
+  --request POST \
+  --data '{"boolean-payload":true,"required_payload":"hello"}' \
+  http://127.0.0.1:9080/get
+```
+
+如果 `Schema` 验证失败，将返回 `400 bad request` 错误。
+
+
+## 禁用插件
+
+在路由 `plugins` 配置块中删除 `request-validation` 配置，即可禁用该插件。
+
+```shell
+curl http://127.0.0.1:9080/apisix/admin/routes/5 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
+{
+    "uri": "/get",
+    "plugins": {
+    },
+    "upstream": {
+    	"type": "roundrobin",
+    	"nodes": {
+        	"127.0.0.1:8080": 1
+    	}
+    }
+}
+```
+
+
+## 示例
+
+**验证 `Enums`:**
+
+```shell
+"body_schema": {
+    "type": "object",
+    "required": ["required_payload"],
+    "properties": {
+            "emum_payload": {
+            "type": "string",
+            enum: ["enum_string_1", "enum_string_2"]
+            default = "enum_string_1"
+        }
+    }
+}
+```
+
+**验证 多级`Json`:**
+
+```shell
+"body_schema": {
+    "type": "object",
+    "required": ["required_payload"],
+    "properties": {
+        "boolean_payload": {"type": "boolean"},
+        "child_element_name": {
+            "type": "object",
+            "properties": {
+                "http_statuses": {
+                    "type": "array",
+                    "minItems": 1,
+                    "items": {
+                        "type": "integer",
+                        "minimum": 200,
+                        "maximum": 599
+                    },
+                    "uniqueItems": true,
+                    "default": [200, 201, 202, 203]
+                }
+            }
+        }
+    }
+}
+```