aws lambda - message: "Internal server error" when try to access aws gateway api

Question

Created Lambda Hello world function using Node.js and created API GateWay trigger for Get call, tried the URL to access Lambda function, getting below error.

message: "Internal server error".

(very new to AWS)

question from:https://stackoverflow.com/questions/47672377/message-internal-server-error-when-try-to-access-aws-gateway-api

Answer 1

You need to pass the statusCode after executing the Lambda function. If you don't pass it the API Gateway will trigger an error 502 Bad Gateway by default.

message = {
   'message': 'Execution started successfully!'
}
return {
    'statusCode': 200,
    'headers': {'Content-Type': 'application/json'},
    'body': json.dumps(message)
}

EDIT: This sample is for Python. For node.js you just need to handle callback, the message is basically the same.

callback(null, {
    statusCode: 200,
    body: JSON.stringify(message),
    headers: {'Content-Type': 'application/json'}
});