How does the handler work in AWS Lambda functions?

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Asked By CuriousCoder123 On

I'm getting into AWS Lambda functions and I've managed to deploy a simple Flask app using the handler from serverless-wsgi. I enabled the function URL when creating it, and while testing through the console, I encountered some errors. Interestingly, the function URL works flawlessly without any issues. Can someone help me understand how this works? Why does the function URL run smoothly while the console testing fails due to event parameter formatting?

2 Answers

Answered By DevDude88 On

You're spot on! For your console tests to succeed, you need to input a JSON object that matches the format received through the function URL. If you’re getting errors, it’s likely due to mismatched data. A good practice is to log the event inside the Lambda function to see what it’s actually receiving; that way, you can adjust your test data accordingly.

Answered By TechieTina92 On

It sounds like you've already figured out part of the puzzle! When testing in the console, if you don't provide the right payload format that the function URL expects, it leads to errors. Basically, the console test doesn’t match the function URL's expected input, so it can't process it correctly.

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