Invoking aws lambda without output file

Question

I'm trying to invoke a lambda on AWS using CLI:

aws lambda invoke --function-name GetErrorLambda --payload '{"body":"{\"Id\":[\"321\",\"123\"]}"}' \output. 

I would like to know if there's a way to print the output on the cli instead of create a file.

Thanks in advance.

Answer 1

stdout and stderr are basically files so can be used for arguments that expect one

aws lambda invoke --function-name GetErrorLambda --payload '{"body":"{\"Id\":[\"321\",\"123\"]}"}' /dev/stdout 

though in this case the rest of the commands output will overlap with it, so probably better to cat it later anyways

Answer 2

It's not possible to output directly to the terminal after invoking a lambda function. This is likely by design as the output could easily be greater than the buffer size for a window.

A simple workaround would be to simply 'cat' out the contents of the output file following the cli command like so:

aws lambda invoke --function-name GetErrorLambda --payload '{"body":"{\"Id\":[\"321\",\"123\"]}"}' \output. && cat outputFileName.txt