Javascript: access parental function's variables

Question

I have the following code (simplified):

function(req, res) {
  var path = 'login';

  req.on('end', function(data) {
    var post = parsevars(rawpost, '&');
    if (typeof post.username !== 'undefined' && typeof post.password !== 'undefined') {
      if (handlelogin(post.username, post.password))
        path = req.url;
    }
  });
}

The bold part is what doesn't work as expected :/
Any input on how to escape this scope restriction would be great.

and what is the expected behavior? do you leak the path in some other closures where you expect it to change when the end fires? otherwise I don't see how it would matter for the outer function that declared it. — Pavel Veller
– Pavel Veller, Commented Apr 28, 2012 at 19:45

BronzeByte · Accepted Answer · 2012-04-28 19:49:00Z

2

It DID work, the code after it was just executed BEFORE the event handler.

answered Apr 28, 2012 at 19:49

BronzeByte

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1 Comment

ZeissS Over a year ago

Welcome to the async world :)

Alnitak · Accepted Answer · 2012-04-28 19:44:27Z

0

Odd, that should work since req is in the outer scope of the closure.

However I think you'll find that the current req is also available as this within the callback, i.e.:

path = this.url;

answered Apr 28, 2012 at 19:44

Alnitak

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1 Comment

davin Over a year ago

Like your edit says, this should work, I very much doubt changing the name of the reference will have an effect. In fact, if it does we should be more worried. Most likely cause: The OP's bug, although with zero information there's not much that can be done.

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