Specify HTTP response codes in Lambda Custom Runtime

Question

I built an [AWS Lambda custom runtime](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-custom.html#runtimes-custom-response-streaming) function to be triggered through function URLs for a streaming response. I don't see how I can set the HTTP response code, such as 404 or 500. I know it's possible for most HTTP codes in the supported runtimes, like NodeJS. Is it possible with custom runtimes?

I asked this question on StackOverflow with no luck https://stackoverflow.com/questions/78443309/custom-http-response-codes-in-aws-lambda-custom-runtime-with-function-urls?noredirect=1#comment138293602_78443309

Didier Durand · Answer

Hi,

Lambda Proxy integration will allow you to return the http code that you want: see https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-create-api-as-simple-proxy-for-lambda.html

Best,

Didier

Specify HTTP response codes in Lambda Custom Runtime

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