我已经使用SAM规范配置了与API网关的lambda代理集成，并通过传递X-Amz-Invocation-Type异步调用lambda：“'Event'” Headers
ApiGateway:
Type: AWS::Serverless::Api
Properties:
StageName: prod
DefinitionBody:
swagger: "2.0"
info:
title:
Ref: AWS::StackName
description: API endpoint for invoking LambdaFunction
version: 1.0.0
paths:
/items:
post:
consumes: ["application/json"]
produces: ["application/json"]
responses: {}
x-amazon-apigateway-integration:
type: "aws_proxy"
uri:
Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${LambdaFunction.Arn}/invocations
passthroughBehavior: "when_no_match"
httpMethod: "POST"
requestParameters:
integration.request.header.X-Amz-Invocation-Type: "'Event'"
问题是lambda返回空响应（调用异步），因此API Gateway会抛出以下错误
星期三11月14日08:03:14 UTC 2018：由于配置错误导致执行失败：格式错误的Lambda代理响应Wed Nov 14 08:03:14 UTC 2018：方法已完成，状态：502
这种行为有望吗？我是否必须明确定义回复？我不想总是扔200，因为我也想发送错误的请求和未经授权的错误 . 什么是避免这个问题的解决方案？