Summary:
Fixes T6692. Addresses two main issues:
- The write guard would sometimes not get disposed of on exception pathways, generating an unnecessary secondary error which was just a symptom of the original root error.
- This was generally confusing and reduced the quality of reports we received because users would report the symptomatic error sometimes instead of the real error.
- Instead, reflow the handling so that we always dispose of the write guard if we create one.
- If we missed the Controller-level error page generation (normally, a nice page with full CSS, etc), we'd jump straight to Startup-level error page generation (very basic plain text).
- A large class of errors occur too early or too late to be handled by Controller-level pages, but many of these errors are not fundamental, and the plain text page is excessively severe.
- Provide a mid-level simple HTML error page for errors which can't get full CSS, but also aren't so fundamental that we have no recourse but plain text.
Test Plan:
Mid-level errors now produce an intentional-looking error page:
{F259885}
Verified that setup errors still render properly.
@chad, feel free to tweak the exception page -- I just did a rough pass on it. Like the setup error stuff, it doesn't have Celerity, so we can't use `{$colors}` and no other CSS will be loaded.
Reviewers: chad, btrahan
Reviewed By: btrahan
Subscribers: epriestley, chad
Maniphest Tasks: T6692
Differential Revision: https://secure.phabricator.com/D11126
Summary:
Fixes T6044. We've had two cases (both the same install, coincidentally) where pages got hung doing too much data fetching.
When pages hang, we don't get a useful stack trace out of them, since nginx, php-fpm, or PHP eventually terminates things in a non-useful way without any diagnostic information.
The second time (the recent Macros issue) I was able to walk the install through removing limits on nginx, php-fpm, php, and eventually getting a profile by letting the page run for several minutes until the request completed. However, this install is exceptionally technically proficient and this was still a big pain for everyone, and this approach would not have worked if the page actually looped rather than just taking a long time.
Provide `debug.time-limit`, which should give us a better tool for reacting to this situation: by setting it to a small value (like 10), we'll kill the page after 10 seconds with a trace, before nginx/php-fpm/php/etc can kill it uselessly. Hopefully that will be enough information to find the issue (generally, getting a trace has been 95% of the problem in the two cases we've encountered).
Test Plan: Set this option to `3` and added a sleep loop, saw a termination after 3 seconds with a useful trace.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: csilvers, joshuaspence, epriestley
Maniphest Tasks: T6044
Differential Revision: https://secure.phabricator.com/D10465
Summary: Fixes T6011. See that task for discussion. We can detect when `memory_limit` will be the limiting factor for drag-and-drop uploads and warn administrators about it.
Test Plan: Fiddled configuration values and hit, then resolved, the issue.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T6011
Differential Revision: https://secure.phabricator.com/D10413
Summary: Ran `arc lint --apply-patches --everything` over rP, mainly to change double quotes to single quotes where appropriate. These changes also validate that the `ArcanistXHPASTLinter::LINT_DOUBLE_QUOTE` rule is working as expected.
Test Plan: Eyeballed it.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, Korvin, hach-que
Differential Revision: https://secure.phabricator.com/D9431
Summary: This is still too rough to enable by default. We can turn it on for `secure.phabricator.com` and tweak it a bit first, and then release it in general with higher defaults and more sensible behavior in edge cases.
Test Plan: Loaded some pages.
Reviewers: btrahan, spicyj
Reviewed By: spicyj
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D8736
Summary:
Fixes T3923. On `secure.phabricator.com`, we occasionally get slowed to a crawl when someone runs a security scanner against us, or 5 search bots decide to simultaneously index every line of every file in Diffusion.
Every time a user makes a request, give their IP address some points. If they get too many points in 5 minutes, start blocking their requests automatically for a while.
We give fewer points for logged in requests. We could futher refine this (more points for a 404, more points for a really slow page, etc.) but let's start simply.
Also, provide a mechanism for configuring this, and configuring the LB environment stuff at the same time (this comes up rarely, but we don't have a good answer right now).
Test Plan: Used `ab` and reloading over and over again to hit rate limits. Read documentation.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: chad, epriestley
Maniphest Tasks: T3923
Differential Revision: https://secure.phabricator.com/D8713
Summary: See D8049. Same deal as that one, but this is in the Phabricator web stack.
Test Plan: Man oh man.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D8050
Summary:
See <https://github.com/facebook/phabricator/issues/487>. If an exception is thrown too high in the stack for the main exception handling to deal with it, we currently never report a stack trace. Instead:
- Always report a stack trace to the error log.
- With developer mode, also report a stack trace to the screen.
Test Plan: Added a high-level `throw` and hit both cases. Got traces in the log and traces-under-developer-mode on screen.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D8022
Summary: Ref T3684 for discussion. This could be cleaned up a bit (it would be nice to draw entropy once per request, for instance, and maybe respect CSRF_TOKEN_LENGTH more closely) but should effectively mitigate BREACH.
Test Plan: Submitted forms; submitted forms after mucking with CSRF and observed CSRF error. Verified that source now has "B@..." tokens.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3684
Differential Revision: https://secure.phabricator.com/D6686
Summary: Ensures that weird behavior from filter_input_array does not remove keys from superglobals. Should fix T3677.
Test Plan:
Checked that $_SERVER contained same number of keys before and after
filtering, and that those affected by the original bug continue to be filtered
correctly.
Reviewers: epriestley, btrahan
Reviewed By: epriestley
CC: zorfling, aran, Korvin, wez
Maniphest Tasks: T3677
Differential Revision: https://secure.phabricator.com/D6680
Summary:
Fixes issue where double-encoding of $_SERVER occurs when php.ini forces all input to be sanitized
Ex:
filter.default = full_special_chars
filter.default_flags = 36
Fix line length
Test Plan: Encountered issue on clean install when registring new user (phusr not defined for email verification). php.ini on that server contains above filter settings. nginx/php-fpm with recommended settings for that server block from setup guide.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D6672
Summary:
These versions are broken, but package distros seem to be picking them up. :/
Since the error you get is completely useless, fatal immediately with a useful message.
Ref T2594.
Test Plan: Faked verisions and hit the issue.
Reviewers: btrahan
Reviewed By: btrahan
CC: brennantaylor, Arijit, aran
Maniphest Tasks: T2594
Differential Revision: https://secure.phabricator.com/D6415
Summary:
D6278 kind of got closed and commited, this is the actual direction.
Ref T3432
Depends on D6277
Test Plan: Keep using the site
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin, mbishopim3
Maniphest Tasks: T3432
Differential Revision: https://secure.phabricator.com/D6283
Summary: See D5874. PhutilDeferredLog's exception on `write()`/`__destruct()` is not especially important and can come at an awkward time. Instead of throwing, just emit an error message to the log.
Test Plan: Faked failed writes and saw an error message in the log instead of many terrible things everywhere.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3144
Differential Revision: https://secure.phabricator.com/D5875
Summary: Fixes T2930. We may not have an access log here yet -- I got a little too overeager with D5533.
Test Plan:
Faked gpc quotes and got a nice error instead of a blank screen:
{F39821}
Reviewers: btrahan, chad
Reviewed By: chad
CC: aran
Maniphest Tasks: T2930
Differential Revision: https://secure.phabricator.com/D5630
Summary:
We have a fair number of conditionals on the existence of the access log. Instead, always build it and just don't write it if the user doesn't want a version on disk.
Also, formalize logged-in user PHID (avoids object existence juggling) in the access log and move microseconds-since-startup to PhabricatorStartup (simplifies index.php).
Depends on D5532. Fixes T2860. Ref T2870.
Test Plan: Disabled access log, verified XHProf writes occurred correctly.
Reviewers: btrahan, chad
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2860, T2870
Differential Revision: https://secure.phabricator.com/D5533
Summary:
The fixed-position side nav background thing tends to make looking at print_r() output hard. Also, it breaks Ajax, etc.
- Loudly call out unexpected output on normal pages, to catch extra spaces before `<?php`, etc.
- Display unexpected output in an attractive panel on normal pages.
- Log unexpected output instead of breaking Ajax.
Test Plan:
{F32267}
Also triggered various fatals and verified they still show the right messages (no blank pages).
Reviewers: vrana, btrahan, chad
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D4892
Summary: This particular misconfiguration results in a difficult-to-debug redirect loop, so stop it early.
Test Plan: Broke my rewrite rule, verified I got yelled at.
Reviewers: btrahan, chad
Reviewed By: chad
CC: aran
Differential Revision: https://secure.phabricator.com/D4591
Summary:
We have a bunch of code duplication now between __init_script__.php and webroot/index.php. Consoldiate these methods and move them into PhabricatorEnv.
Merge PhabricatorRequestOverseer into PhabricatorStartup.
Test Plan: Loaded page, ran script. Wiped PHABRICATOR_ENV; loaded page, ran script; got errors.
Reviewers: btrahan, vrana
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2223
Differential Revision: https://secure.phabricator.com/D4283
Summary:
We have a lot of mess to get through before we can load libphutil and enter Phabricator code properly. Move it to a dedicated class.
I'm probably going to merge PhabricatorRequestOverseer into this, although the check that lives there now is kind of weird. It also does not really need to be a pre-load check and could be handled better.
I stopped shoving stuff in here once I got to ENV stuff, I'm going to tackle that next.
Test Plan: Ran phabricator normally; introduced fatals and misconfigurations. Grepped for changed symbols.
Reviewers: btrahan, vrana
Reviewed By: btrahan
CC: aran, asherkin
Maniphest Tasks: T2223
Differential Revision: https://secure.phabricator.com/D4282
