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request-validation

request-validation 插件在将请求转发到上游服务之前对其进行验证。该插件使用 JSON Schema 进行验证，并且可以验证请求的请求头（headers）和请求体（body）。

请参阅 JSON schema 规范 以了解有关语法的更多信息。

示例​

以下示例展示了如何在不同场景下配置 request-validation。

验证请求头​

以下示例展示了如何根据定义的 JSON schema 验证请求头。

如下所示创建带有 request-validation 插件的路由：

curl "http://127.0.0.1:9180/apisix/admin/routes" -X PUT \
  -H "X-API-KEY: ${ADMIN_API_KEY}" \
  -d '{
    "id": "request-validation-route",
    "uri": "/get",
    "plugins": {
      "request-validation": {
        "header_schema": {
          "type": "object",
          "required": ["User-Agent", "Host"],
          "properties": {
            "User-Agent": {
              "type": "string",
              "pattern": "^curl\/"
            },
            "Host": {
              "type": "string",
              "enum": ["httpbin.org", "httpbin"]
            }
          }
        }
      }
    },
    "upstream": {
      "type": "roundrobin",
      "nodes": {
        "httpbin.org:80": 1
      }
    }
  }'

❶ required：要求请求必须包含指定的请求头。

❷ properties：要求请求头必须符合指定的条件。

验证符合 Schema 的请求​

发送一个带有符合 Schema 的 Host: httpbin 请求头的请求：

curl -i "http://127.0.0.1:9080/get" -H "Host: httpbin"

你应该收到类似于以下的 HTTP/1.1 200 OK 响应：

{
  "args": {}, 
  "headers": {
    "Accept": "*/*", 
    "Host": "httpbin", 
    "User-Agent": "curl/7.74.0", 
    "X-Amzn-Trace-Id": "Root=1-6509ae35-63d1e0fd3934e3f221a95dd8", 
    "X-Forwarded-Host": "httpbin"
  }, 
  "origin": "127.0.0.1, 183.17.233.107", 
  "url": "http://httpbin/get"
}

验证不符合 Schema 的请求​

发送一个不带任何请求头的请求：

curl -i "http://127.0.0.1:9080/get"

你应该收到 HTTP/1.1 400 Bad Request 响应，表明请求验证失败：

property "Host" validation failed: matches none of the enum value

发送一个包含必需请求头但不符合其值要求的请求：

curl -i "http://127.0.0.1:9080/get" -H "Host: httpbin" -H "User-Agent: cli-mock"

你应该收到 HTTP/1.1 400 Bad Request 响应，表明 User-Agent 请求头的值不匹配预期模式：

property "User-Agent" validation failed: failed to match pattern "^curl/" with "cli-mock"

自定义拒绝消息和状态码​

以下示例展示了当验证失败时如何自定义响应状态码和消息。

如下所示配置带有 request-validation 插件的路由：

curl "http://127.0.0.1:9180/apisix/admin/routes" -X PUT \
  -H "X-API-KEY: ${ADMIN_API_KEY}" \
  -d '{
    "id": "request-validation-route",
    "uri": "/get",
    "plugins": {
      "request-validation": {
        "header_schema": {
          "type": "object",
          "required": ["Host"],
          "properties": {
            "Host": {
              "type": "string",
              "enum": ["httpbin.org", "httpbin"]
            }
          }
        },
        "rejected_code": 403,
        "rejected_msg": "Request header validation failed."
      }
    },
    "upstream": {
      "type": "roundrobin",
      "nodes": {
        "httpbin.org:80": 1
      }
    }
  }'

❶ rejected_code：自定义拒绝状态码。

❷ rejected_msg：自定义拒绝消息。

发送一个带有配置错误的 Host 请求头的请求：

curl -i "http://127.0.0.1:9080/get" -H "Host: httpbin2"

你应该收到 HTTP/1.1 403 Forbidden 响应和自定义消息：

Request header validation failed.

验证请求体​

以下示例展示了如何根据定义的 JSON schema 验证请求体。

request-validation 插件支持验证两种类型的媒体类型：

  • application/json
  • application/x-www-form-urlencoded

验证 JSON 请求体​

如下所示创建带有 request-validation 插件的路由：

curl "http://127.0.0.1:9180/apisix/admin/routes" -X PUT \
  -H "X-API-KEY: ${ADMIN_API_KEY}" \
  -d '{
    "id": "request-validation-route",
    "uri": "/post",
    "plugins": {
      "request-validation": {
        "header_schema": {
          "type": "object",
          "required": ["Content-Type"],
          "properties": {
            "Content-Type": {
            "type": "string",
            "pattern": "^application\/json$"
            }
          }
        },
        "body_schema": {
          "type": "object",
          "required": ["required_payload"],
          "properties": {
            "required_payload": {"type": "string"},
            "boolean_payload": {"type": "boolean"},
            "array_payload": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "integer",
                "minimum": 200,
                "maximum": 599
              },
              "uniqueItems": true,
              "default": [200]
            }
          }
        }
      }
    },
    "upstream": {
      "type": "roundrobin",
      "nodes": {
        "httpbin.org:80": 1
      }
    }
  }'

发送一个符合 Schema 的 JSON 请求体的请求进行验证：

curl -i "http://127.0.0.1:9080/post" -X POST \
  -H "Content-Type: application/json" \
  -d '{"required_payload":"hello", "array_payload":[301]}'

你应该收到类似于以下的 HTTP/1.1 200 OK 响应：

{
  "args": {}, 
  "data": "{\"array_payload\":[301],\"required_payload\":\"hello\"}", 
  "files": {}, 
  "form": {}, 
  "headers": {
    ...
  }, 
  "json": {
    "array_payload": [
      301
    ],
    "required_payload": "hello"
  },
  "origin": "127.0.0.1, 183.17.233.107", 
  "url": "http://127.0.0.1/post"
}

如果你发送一个未指定 Content-Type: application/json 的请求：

curl -i "http://127.0.0.1:9080/post" -X POST \
  -d '{"required_payload":"hello,world"}'

你应该收到类似于以下的 HTTP/1.1 400 Bad Request 响应：

property "Content-Type" validation failed: failed to match pattern "^application/json$" with "application/x-www-form-urlencoded"

同样，如果你发送一个缺少必需 JSON 字段 required_payload 的请求：

curl -i "http://127.0.0.1:9080/post" -X POST \
  -H "Content-Type: application/json" \
  -d '{}'

你应该收到 HTTP/1.1 400 Bad Request 响应：

property "required_payload" is required

验证 URL 编码表单请求体​

如下所示创建带有 request-validation 插件的路由：

curl "http://127.0.0.1:9180/apisix/admin/routes" -X PUT \
  -H "X-API-KEY: ${ADMIN_API_KEY}" \
  -d '{
    "id": "request-validation-route",
    "uri": "/post",
    "plugins": {
      "request-validation": {
        "header_schema": {
          "type": "object",
          "required": ["Content-Type"],
          "properties": {
            "Content-Type": {
              "type": "string",
              "pattern": "^application\/x-www-form-urlencoded$"
            }
          }
        },
        "body_schema": {
          "type": "object",
          "required": ["required_payload","enum_payload"],
          "properties": {
            "required_payload": {"type": "string"},
            "enum_payload": {
              "type": "string",
              "enum": ["enum_string_1", "enum_string_2"],
              "default": "enum_string_1"
            }
          }
        }
      }
    },
    "upstream": {
      "type": "roundrobin",
      "nodes": {
        "httpbin.org:80": 1
      }
    }
  }'

发送一个带有 URL 编码表单数据的请求进行验证：

curl -i "http://127.0.0.1:9080/post" -X POST \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "required_payload=hello&enum_payload=enum_string_1"

你应该收到类似于以下的 HTTP/1.1 200 OK 响应：

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "enum_payload": "enum_string_1", 
    "required_payload": "hello"
  }, 
  "headers": {
    ...
  }, 
  "json": null, 
  "origin": "127.0.0.1, 183.17.233.107", 
  "url": "http://127.0.0.1/post"
}

发送一个缺少 URL 编码字段 enum_payload 的请求：

curl -i "http://127.0.0.1:9080/post" -X POST \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "required_payload=hello"

你应该收到以下的 HTTP/1.1 400 Bad Request 响应：

property "enum_payload" is required

附录：JSON Schema​

以下部分提供了样板 JSON schema，你可以根据需要进行调整、组合并在此插件中使用。有关完整参考，请参阅 JSON schema 规范。

枚举值​

{
  "body_schema": {
    "type": "object",
    "required": ["enum_payload"],
    "properties": {
      "enum_payload": {
        "type": "string",
        "enum": ["enum_string_1", "enum_string_2"],
        "default": "enum_string_1"
      }
    }
  }
}

布尔值​

{
  "body_schema": {
    "type": "object",
    "required": ["bool_payload"],
    "properties": {
      "bool_payload": {
        "type": "boolean",
        "default": true
      }
    }
  }
}

数值​

{
  "body_schema": {
    "type": "object",
    "required": ["integer_payload"],
    "properties": {
      "integer_payload": {
        "type": "integer",
        "minimum": 1,
        "maximum": 65535
      }
    }
  }
}

字符串​

{
  "body_schema": {
    "type": "object",
    "required": ["string_payload"],
    "properties": {
      "string_payload": {
        "type": "string",
        "minLength": 1,
        "maxLength": 32
      }
    }
  }
}

字符串正则表达式​

{
  "body_schema": {
    "type": "object",
    "required": ["regex_payload"],
    "properties": {
      "regex_payload": {
        "type": "string",
        "minLength": 1,
        "maxLength": 32,
        "pattern": "[[^[a-zA-Z0-9_]+$]]"
      }
    }
  }
}

数组​

{
  "body_schema": {
    "type": "object",
    "required": ["array_payload"],
    "properties": {
      "array_payload": {
        "type": "array",
        "minItems": 1,
        "items": {
          "type": "integer",
          "minimum": 200,
          "maximum": 599
        },
        "uniqueItems": true,
        "default": [200, 302]
      }
    }
  }
}