functions called from browser execute twice

Although curl will only call the function once. Chrome load or refresh calls the function twice. A bit confusing when debugging something more complex than HelloWorld.

Very easy to see:

exports.helloWorld = (req, res) => {
    console.log('running HelloWorld'); // <-- oh no not again
    res.send('Hello, World');
  };

Is there a way to stop this?

[stew-r]

OK so we think this is happening because browser requests also send a request for a favicon. This means that hitting the function in the browser results in two invocations of the function.

I think we can fix this by changing our logic to only invoke the function in response to requests on /${function_name} instead of /*.

Thanks for the report.

[Didier68]

Hello, I have the same problem, but I do not understand the answers speaking the link with favicon: in the second call, I find in “req.url” the same path as in the first call. This bug becomes annoying as soon as I dedug the Node server, because I’m juggling between 2 threads which do the same things in parallel.

Does anyone know how to block this in Chrome?