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phorge-phorge/src/applications/files/controller/PhabricatorFileController.php
epriestley a9f2c07345 Generate a 403 page with a nice dialog when a file token is invalid
Summary:
Ref T5685. Currently we just 403 on an invalid token, but we can be a little more helpful.

The issues here are:

  - If we **do** redirect you on this page and something goes wrong, you might get stuck in a redirect loop.
  - If we **don't** redirect you, copy/pasting the link to someone (or reloading the page) gives them a pretty confusing result, since the link doesn't work any more. Prior to this diff, they get a 403.

To mitigate this, do a little better than a bare 403: give them a link to auth and generate a new URI for the file.

If this is still confusing, the next best thing I can come up with is something like this:

  - Put some modulous of the timestamp in the URI.
  - If the current time is within 2 seconds of the generation time, show this dialog.
  - Otherwise, redirect.

That seems like it would be okay, but I worry that "2" has to be small (so links you copy/paste -> chat -> click still work) and a small value means that a small amount of clock skew breaks things. We could use the database clock, but ehhh.

Other ideas:

  - Put a hash of the remote IP in the URI, redirect if it doesn't match. Fails for companies behind a NAT gateway but should work in a lot of other cases.
  - Just redirect always, there's no reason it should ever loop and browsers don't really do anything bad when there's a loop (they'll show an error after too many redirects).

I'm leaning toward letting this stabilize in the wild for a bit, then trying "always redirect".

Test Plan: {F188914}

Reviewers: btrahan, 20after4

Reviewed By: 20after4

Subscribers: epriestley

Maniphest Tasks: T5685

Differential Revision: https://secure.phabricator.com/D10215
2014-08-11 09:39:25 -07:00

29 lines
681 B
PHP

<?php
abstract class PhabricatorFileController extends PhabricatorController {
protected function buildSideNavView() {
$menu = $this->buildMenu($for_devices = false);
return AphrontSideNavFilterView::newFromMenu($menu);
}
protected function buildApplicationMenu() {
return $this->buildMenu($for_devices = true);
}
private function buildMenu($for_devices) {
$menu = new PHUIListView();
if ($for_devices) {
$menu->newLink(pht('Upload File'), $this->getApplicationURI('/upload/'));
}
id(new PhabricatorFileSearchEngine())
->setViewer($this->getRequest()->getUser())
->addNavigationItems($menu);
return $menu;
}
}