从AWS API网关请求验证程序获取详细错误消息

出身背景

我使用Swagger 2.0定义创建了一个API网关 API Gateway extensions .

我覆盖了默认的API网关响应,例如:

x-amazon-apigateway-gateway-responses:
  BAD_REQUEST_BODY:
    statusCode: 400
    responseTemplates:
      application/json: |
        {
          "error": {
            "code": 400,
            "stage": "$context.stage",
            "request": "$context.requestId",
            "message": "$context.error.message"
          }
        }

这个 $context 上述有效载荷来自 API Gateway variables .

我的API中的示例资源/方法如下所示(始终 LAMBDA_PROXY 集成):

paths:
  /test:
    post:
      parameters:
        - in: body
          name: Test
          required: true
          schema:
          $ref: "#/definitions/Test"
      responses:
        201:
          description: Created
        400:
          description: Bad Request
        401:
          description: Unauthorized
        403:
          description: Forbidden
      x-amazon-apigateway-integration:
      uri: >-
        arn:aws:apigateway:${region}:lambda:path/2015-03-31/functions/${lambda}/invocations
      type: aws_proxy
      httpMethod: POST
      credentials: "${credentials}"
      passthroughBehavior: never

使用相应的请求有效负载定义:

definitions:
  Test:
    type: object
    title: Test
    required:
      - date
    properties:
      date:
        type: string
        pattern: "^20[0-9]{2}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$"
        description: Date in YYYY-MM-DD Format

以及 request validator extensions :

x-amazon-apigateway-request-validator: body
x-amazon-apigateway-request-validators:
  body:
    validateRequestBody: true
    validateRequestParameters: false

问题

当我调用此端点时,缺少或无效 date ,我总是得到同样的回答:

{
    "error": {
        "code": 400,
        "stage": "latest",
        "request": "6b7a64f5-e7f0-11e7-845b-f53ceb4cb049",
        "message": "Invalid request body"
    }
}

但是,当我通过API网关控制台测试它时 日期 属性:

Request body does not match model schema for content type application/json: [
  object has missing required properties (["date"])
]

还有一个病人 日期 :

Request body does not match model schema for content type application/json: [
  ECMA 262 regex "^20[0-9]{2}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$" does not match input string "2017/12/25"
]

问题

如何访问详细的错误消息,以便使用比 Invalid request body ? 我怀疑这一定是可能的,也许使用 x-amazon-apigateway-gateway-responses 映射,但到目前为止我还没能做到。