如何在 cloudformation 中为 api 网关自定义响应

Question

我在 apicloudformation 的网关模板

中为我的 GET 方法配置了以下配置

      "paths": {
        "/customer/{customerid}": {
          "get": {
            "description": "Returns JSON customer objects from DynamoDB.",
            "parameters": [
              {
                "required": true,
                "type": "string",
                "name": "customerid",
                "in": "path"
              }
            ],
            "produces": [
              "application/json"
            ],
            "x-amazon-apigateway-integration": {
              "passthroughBehavior": "never",
              "responses": {
                "default": {
                  "statusCode": "200"
                }
              },
              "uri": {
                "Fn::Join": [
                  ":",
                  [
                    "arn",
                    "aws",
                    "apigateway",
                    {
                      "Ref": "AWS::Region"
                    },
                    "dynamodb",
                    "action/GetItem"
                  ]
                ]
              },
              "httpMethod": "POST",
              "requestTemplates": {
                "application/json": "{\n  \"TableName\": \"customer\",\n  \"Key\": {\n    \"customerid\": {\n      \"S\": \"$input.params('customerid')\"\n    }\n  }\n}\n"
              },
              "credentials": {
                "Fn::GetAtt": [
                  "TableAccessRole",
                  "Arn"
                ]
              },
              "type": "aws"
            },
            "consumes": [
              "application/json"
            ],
            "responses": {
              "200": {
                "description": "200 response"
              }
            }
          }
        }

正在完美创建api，但是api的响应是

{
  "Item": {
    "Name": {
      "S": "Alex"
    },
    "CustomerId": {
      "S": "123"
    }
  }
}

但我希望它像

一样简单 json

{
    "Name":"Alex",
    "CustomerId":"123"
}

我正在查看 aws 文档，但我无法弄清楚我的配置的哪一部分需要更改。我知道我有 input 变量可以用来获取数据，但是在哪里以及如何，我迷路了

Answer 1

由于您现有的模板使用了您已经定义的x-amazon-apigateway-integration Swagger extension, you can add a responseTemplates object containing your response mapping template to the existing default response：

"x-amazon-apigateway-integration": {
  "passthroughBehavior": "never",
  "responses": {
    "default": {
      "statusCode": "200",
      "responseTemplates": {
        "application/json": "{\"Name\": \"$input.path('$.Item.Name.S')\", \"CustomerId\": \"$input.path('$.Item.CustomerId.S')\"}"
      }
    }
  },
  [...]