Lambda error regex not working

Serverless Framework
,
1

Hi team,

I am using an API gateway connected to a Lambda function.

The Lambda function response is returning:

Response

{
“statusCode”: 400,
“body”: “{"errorType":"UserLambdaValidationException","message":"PreSignUp failed with error [UserAlreadyExists] Registration failed. A user with that email already exists…"}”
}

Lambda Error Regex: .“errorType”:“UserLambdaValidationException”.

Yet when I test via API gateway or Postman it is still returning a 200 OK response.

I have tried a variety of different response formats and regex combinations.

Any suggestions or ideas?

Thank you,
David

2

could you share your yml file?

3

Hi, I am using AWS Console

4

Thanks for your reply. I have exported my current config… please see below and let me know if you have any thoughts or feedback.

/register:
  post:
    produces:
    - "application/json"
    responses:
      "200":
        description: "200 response"
        schema:
          $ref: "#/definitions/Empty"
        headers:
          Access-Control-Allow-Origin:
            type: "string"
      "400":
        description: "400 response"
        schema:
          $ref: "#/definitions/Empty"
        headers:
          Access-Control-Allow-Origin:
            type: "string"
    x-amazon-apigateway-integration:
      type: "aws"
      httpMethod: "POST"
      uri: "arn:aws:apigateway:ap-southeast-2:lambda:path/2015-03-31/functions/arn:aws:lambda:ap-southeast-2:<ACCOUNT_ID>:function:<FUNCTION NAME>/invocations"
      responses:
        default:
          statusCode: "200"
        ".*\"errorType\":\"UserLambdaValidationException\".*":
          statusCode: "400"
          responseParameters:
            method.response.header.Access-Control-Allow-Origin: "'*'"
          responseTemplates:
            application/json: "#set($inputRoot = $input.path('$'))\r\n{\r\n  \"\
              statusCode\": \"$inputRoot.statusCode\",\r\n  \"body\": $input.json('$.body')\r\
              \n}\r\n"
      passthroughBehavior: "when_no_match"
      contentHandling: "CONVERT_TO_TEXT"
definitions:
  Empty:
    type: "object"
    title: "Empty Schema"
x-amazon-apigateway-gateway-responses:
  DEFAULT_4XX:
    responseParameters:
      gatewayresponse.header.Access-Control-Allow-Methods: "'OPTIONS,POST'"
      gatewayresponse.header.Access-Control-Allow-Credentials: "'true'"
      gatewayresponse.header.Access-Control-Allow-Origin: "'https://localhost:3000'"
      gatewayresponse.header.Access-Control-Allow-Headers: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
  DEFAULT_5XX:
    responseParameters:
      gatewayresponse.header.Access-Control-Allow-Methods: "'OPTIONS,POST'"
      gatewayresponse.header.Access-Control-Allow-Credentials: "'true'"
      gatewayresponse.header.Access-Control-Allow-Origin: "'https://localhost:3000'"
      gatewayresponse.header.Access-Control-Allow-Headers: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"