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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
bin Add a bin/hunks script to manage migrations of hunk data 2014-06-03 18:01:23 -07:00
conf Remove @group annotations 2014-07-10 08:12:48 +10:00
externals Update Stripe PHP API 2014-07-13 09:19:07 -07:00
resources Add Phund app icon 2014-08-11 09:26:41 -07:00
scripts Improve bin/storage upgrade behavior when run out-of-order 2014-08-08 15:44:40 -07:00
src Generate a 403 page with a nice dialog when a file token is invalid 2014-08-11 09:39:25 -07:00
support Return a HTTP 500 instead of a HTTP 400 if an internal error occurs in the Aphlict server 2014-07-18 09:20:00 +10:00
webroot Add Phund app icon 2014-08-11 09:26:41 -07:00
.arcconfig Update .arclint in Phabricator for phutil-library lint 2014-05-12 06:01:30 -07:00
.arclint Rename Conduit classes 2014-07-25 10:54:15 +10:00
.editorconfig Specify config for text editors 2012-11-03 22:34:44 -07:00
.gitignore Update .gitignore. 2014-06-14 11:44:19 -07:00
LICENSE Delete license headers from files 2012-11-05 11:16:51 -08:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README Reformat README as Remarkup 2014-07-16 22:10:36 +10:00

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