Commit Graph

177 Commits

Author SHA1 Message Date
Robin Ward 532fea1460
DEV: Provide API for anonymous cache segments (#8455)
This can be used from a plugin that needs to establish something new in
the anonymous cache. For example `is_ie` for an internet explorer
plugin.
2019-12-05 14:57:18 -05:00
Joffrey JAFFEUX 0d3d2c43a0
DEV: s/\$redis/Discourse\.redis (#8431)
This commit also adds a rubocop rule to prevent global variables.
2019-12-03 10:05:53 +01:00
Sam Saffron 423ad5f0a4 FIX: do not log if an invalid mime type is passed to app
Previously our custom exception handler was unable to handle situations
where an invalid mime type was sent, resulting in a warning log

This ensures we pretend a request is HTML for the purpose of rendering
the error page if an invalid mime type from a scanner is shipped to the app
2019-11-21 15:51:34 +11:00
Penar Musaraj 74869b8a7f FIX: Do not consider mobile app traffic as crawler visits
Followup to a4eb523a
2019-11-04 09:16:50 -05:00
Daniel Waterworth 563253e9ed FIX: Fix options given to per-minute rate limiter
Previously the options for the per-minute and per-10-second rate
limiters were the same.
2019-09-20 10:48:59 +01:00
Sam Saffron ed00f35306 FEATURE: improve performance of anonymous cache
This commit introduces 2 features:

1. DISCOURSE_COMPRESS_ANON_CACHE (true|false, default false): this allows
you to optionally compress the anon cache body entries in Redis, can be
useful for high load sites with Redis that lives on a separate server to
to webs

2. DISCOURSE_ANON_CACHE_STORE_THRESHOLD (default 2), only pop entries into
redis if we observe them more than N times. This avoids situations where
a crawler can walk a big pile of topics and store them all in Redis never
to be used. Our default anon cache time for topics is only 60 seconds. Anon
cache is in place to avoid the "slashdot" effect where a single topic is
hit by 100s of people in one minute.
2019-09-04 17:18:32 +10:00
Sam Saffron b9954b53bb FIX: report cached controller and action to loggers
Previously we would treat all cached hits in anon cache as "other"

This hinders analysis of cache performance and makes logging inaccurate
2019-09-03 10:55:16 +10:00
Sam Saffron 08743e8ac0 FEATURE: anon cache reports data to loggers
This allows custom plugins such as prometheus exporter to log how many
requests are stored in the anon cache vs used by the anon cache.

This metric allows us to fine tune cache behaviors
2019-09-02 18:45:35 +10:00
Régis Hanol 75eebc904e FEATURE: new 'Discourse-Render' HTTP header 2019-08-30 20:45:18 +02:00
Sam Saffron 8cea78c833 Revert "FEATURE: Protect against replay attacks when using TLS 1.3 0-RTT (#8020)"
This reverts commit 39c31a3d76.

Sorry about this, we have decided againse supporting 0-RTT directly in
core, this can be supported with similar hacks to this commit in a
plugin.

That said, we recommend against using a 0-RTT proxy for the Discourse
app due to inherit risk of replay attacks.
2019-08-26 08:56:49 +10:00
Rafael dos Santos Silva 39c31a3d76
FEATURE: Protect against replay attacks when using TLS 1.3 0-RTT (#8020) 2019-08-23 11:52:47 -03:00
David Taylor f4aa6096ab FIX: Convert omniauth authenticator names to symbols before comparing
This is necessary because some auth plugins define their name as a string
2019-08-14 12:57:11 +01:00
David Taylor 1a8fee11a0 DEV: If only one auth provider is enabled allow GET request
In this case, the auth provider is acting as a SSO provider, and can be trusted to maintain its own CSRF protections.
2019-08-12 11:03:05 +01:00
David Taylor 750802bf56
UX: Improve error handling for common OmniAuth exceptions (#7991)
This displays more useful messages for the most common issues we see:
- CSRF (when the user switches browser)
- Invalid IAT (when the server clock is wrong)
- OAuth::Unauthorized for OAuth1 providers, when the credentials are incorrect

This commit also stops earlier for disabled authenticators. Now we stop at the request phase, rather than the callback phase.
2019-08-12 10:55:02 +01:00
Sam Saffron 1f47ed1ea3 PERF: message_bus will be deferred by server when flooded
The message_bus performs a fair amount of work prior to hijacking requests
this change ensures that if there is a situation where the server is flooded
message_bus will inform client to back off for 30 seconds + random(120 secs)

This back-off is ultra cheap and happens very early in the middleware.

It corrects a situation where a flood to message bus could cause the app
to become unresponsive

MessageBus update is here to ensure message_bus gem properly respects
Retry-After header and status 429.

Under normal state this code should never trigger, to disable raise the
value of DISCOURSE_REJECT_MESSAGE_BUS_QUEUE_SECONDS, default is to tell
message bus to go away if we are queueing for 100ms or longer
2019-08-09 17:48:01 +10:00
David Taylor 3b8c468832 SECURITY: Require POST with CSRF token for OmniAuth request phase 2019-08-08 11:58:00 +01:00
Sam Saffron 62141b6316 FEATURE: enable_performance_http_headers for performance diagnostics
This adds support for DISCOURSE_ENABLE_PERFORMANCE_HTTP_HEADERS
when set to `true` this will turn on performance related headers

```text
X-Redis-Calls: 10     # number of redis calls
X-Redis-Time: 1.02    # redis time in seconds
X-Sql-Commands: 102   # number of SQL commands
X-Sql-Time: 1.02      # duration in SQL in seconds
X-Queue-Time: 1.01    # time the request sat in queue (depends on NGINX)
```

To get queue time NGINX must provide: HTTP_X_REQUEST_START

We do not recommend you enable this without thinking, it exposes information
about what your page is doing, usually you would only enable this if you
intend to strip off the headers further down the stream in a proxy
2019-06-05 16:08:11 +10:00
Maja Komel 42809f4d69 FIX: use crawler layout when saving url in Wayback Machine (#7667) 2019-06-03 12:13:32 +10:00
Sam Saffron 30990006a9 DEV: enable frozen string literal on all files
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.

Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
2019-05-13 09:31:32 +08:00
Penar Musaraj a4eb523af6 Track Discourse user agent pageviews as crawler
Since 5bfe051e, Discourse user agents are marked as non-crawlers (to avoid accidental blacklisting). This makes sure pageviews for these agents are tracked as crawler hits.
2019-05-08 10:38:55 -04:00
David Taylor 8963f1af30
FEATURE: Optional detailed performance logging for Sidekiq jobs (#7091)
By default, this does nothing. Two environment variables are available:

- `DISCOURSE_LOG_SIDEKIQ`

  Set to `"1"` to enable logging. This will log all completed jobs to `log/rails/sidekiq.log`, along with various db/redis/network statistics. This is useful to track down poorly performing jobs.

- `DISCOURSE_LOG_SIDEKIQ_INTERVAL`

  (seconds) Check running jobs periodically, and log their current duration. They will appear in the logs with `status:pending`. This is useful to track down jobs which take a long time, then crash sidekiq before completing.
2019-03-05 11:19:11 +00:00
Guo Xiang Tan c732ae9ca9 FIX: Don't update `User#last_seen_at` when PG is in readonly. 2019-01-21 13:29:29 +08:00
Guo Xiang Tan e2a20d90fe FIX: Don't log request when Discourse is in readonly due to PG. 2019-01-21 11:04:32 +08:00
Sam a19170a4c2 DEV: avoid require_dependency for some libs
This avoids require dependency on method_profiler and anon cache.

It means that if there is any change to these files the reloader will not pick it up.

Previously the reloader was picking up the anon cache twice causing it to double load on boot.

This caused warnings.

Long term my plan is to give up on require dependency and instead use:

https://github.com/Shopify/autoload_reloader
2018-12-31 10:53:30 +11:00
Sam 939b82ef0c DEV: correct intermittent test failure
ActionController::BadRequest can not be re-dispatched, under some conditions
we are getting this vs InvalidParameterError in the following test

59c56bd20f/spec/requests/application_controller_spec.rb (L34-L62)
2018-12-13 18:27:13 +11:00
David Taylor c7c56af397
FEATURE: Allow connecting associated accounts when two-factor is enabled (#6754)
Previously the 'reconnect' process was a bit magic - IF you were already logged into discourse, and followed the auth flow, your account would be reconnected and you would be 'logged in again'.

Now, we explicitly check for a reconnect=true parameter when the flow is started, store it in the session, and then only follow the reconnect logic if that variable is present. Setting this parameter also skips the 'logged in again' step, which means reconnect now works with 2fa enabled.
2018-12-11 13:19:00 +00:00
Sam 955cdad649 FIX: exec_params needs instrumentation
the method no longer routes to "exec" or "async_exec" in latest PG so we
need to explicitly intercept
2018-12-10 14:28:10 +11:00
David Taylor 4e010382cc REFACTOR: Initialize auth providers after `plugin.activate!`
Also added some helpful functionality for plugin developers:
- Raises RuntimeException if the auth provider has been registered too late
- Logs use of deprecated parameters
2018-11-30 16:58:18 +00:00
Sam e7001f879a SECURITY: enforce hostname to match discourse hostname
This ensures that the hostname rails uses for various helpers always matches
the Discourse hostname
2018-11-15 15:23:06 +11:00
Sam 5b630f3188 FIX: stop logging every time invalid params are sent
Previously we were logging warning for invalid encoded params, this can
cause a log flood
2018-10-05 14:33:19 +10:00
Neil Lalonde 526ffc4966 FIX: error in response body to blocked crawlers, showing 500 Internal Server Error with status of 403 2018-09-14 15:40:20 -04:00
Neil Lalonde b87a089822 FIX: don't block api requests when whitelisted_crawler_user_agents is set 2018-09-14 15:40:20 -04:00
Sam 168ffd8384 FEATURE: group warnings about IP level rate limiting 2018-08-13 14:38:20 +10:00
Osama Sayegh 0b7ed8ffaf FEATURE: backend support for user-selectable components
* FEATURE: backend support for user-selectable components

* fix problems with previewing default theme

* rename preview_key => preview_theme_id

* omit default theme from child themes dropdown and try a different fix

* cache & freeze stylesheets arrays
2018-08-08 14:46:34 +10:00
Sam 379384ae1e FIX: never block /srv/status which is used for health checks
This route is also very cheap so blocking it is not required

It is still rate limited and so on elsewhere
2018-07-18 12:37:01 +10:00
OsamaSayegh decf1f27cf FEATURE: Groundwork for user-selectable theme components
* Phase 0 for user-selectable theme components

- Drops `key` column from the `themes` table
- Drops `theme_key` column from the `user_options` table
- Adds `theme_ids` (array of ints default []) column to the `user_options` table and migrates data from `theme_key` to the new column.
- Removes the `default_theme_key` site setting and adds `default_theme_id` instead.
- Replaces `theme_key` cookie with a new one called `theme_ids`
- no longer need Theme.settings_for_client
2018-07-12 14:18:21 +10:00
Sam e72fd7ae4e FIX: move crawler blocking into anon cache
This refinement of previous fix moves the crawler blocking into
anonymous cache

This ensures we never poison the cache incorrectly when blocking crawlers
2018-07-04 11:14:43 +10:00
Sam 7f98ed69cd FIX: move crawler blocking to app controller
We need access to site settings in multisite, we do not have access
yet if we attempt to get them in request tracker middleware
2018-07-04 10:30:50 +10:00
Neil Lalonde e8a6323bea remove crawler blocking until multisite support 2018-07-03 17:54:45 -04:00
Sam 035312d501 FIX: specify path for dosp cookie 2018-04-24 11:07:58 -04:00
Sam ded84a4b58 PERF: improve performance once logged in rate limiter hits
If "logged in" is being forced anonymous on certain routes, trigger
the protection for any requests that spend 50ms queueing

This means that ...

1. You need to trip it by having 3 requests take longer than 1 second in 10 second interval
2. Once tripped, if your route is still spending 50m queueuing it will continue to be protected

This means that site will continue to function with almost no delays while it is scaling up to handle the new load
2018-04-23 11:55:25 +10:00
Sam 4810ce3607 correct regression 2018-04-18 21:04:08 +10:00
Sam 59cd7894d9 FEATURE: if site is under extreme load show anon view
If a particular path is being hit extremely hard by logged on users,
revert to anonymous cached view.

This will only come into effect if 3 requests queue for longer than 2 seconds
on a *single* path.

This can happen if a URL is shared with the entire forum base and everyone
is logged on
2018-04-18 16:58:57 +10:00
Neil Lalonde b87fa6d749 FIX: blacklisted crawlers could get through by omitting the accept header 2018-04-17 12:39:30 -04:00
Sam 9980f18d86 FEATURE: track request queueing as early as possible 2018-04-17 18:06:17 +10:00
Neil Lalonde 4d12ff2e8a when writing cache, remove elements from the user agents list. also return a message and content type when blocking a crawler. 2018-03-27 13:44:14 -04:00
Neil Lalonde a84bb81ab5 only applies to get html requests 2018-03-22 17:57:44 -04:00
Neil Lalonde ced7e9a691 FEATURE: control which web crawlers can access using a whitelist or blacklist 2018-03-22 15:41:02 -04:00
Sam 0134e41286 FEATURE: detect when client thinks user is logged on but is not
This cleans up an error condition where UI thinks a user is logged on
but the user is not. If this happens user will be prompted to refresh.
2018-03-06 16:49:31 +11:00
Sam f0d5f83424 FEATURE: limit assets less that non asset paths
By default assets can be requested up to 200 times per 10 seconds
from the app, this includes CSS and avatars
2018-03-06 15:20:39 +11:00
Sam f295a18e94 FIX: stop double counting net calls in logs 2018-02-28 10:45:11 +11:00
Sam ca1a3f37e3 FEATURE: add instrumentation for all external net calls 2018-02-21 15:20:29 +11:00
Guo Xiang Tan 3e835047da Remove "already initialized" constant warning. 2018-02-13 08:55:15 +08:00
Sam Saffron df8e43abdd use lazy & instead of try
unregister ip skipper in test
raise if called when a skipper is in play
2018-02-06 10:38:15 +11:00
Robin Ward eefd226611 Add extensibility point to `request_tracker` to skip IP addresses
This is useful if you want to run a per IP rate limiter but want to be
able to skip some IPs with custom logic.
2018-02-05 17:49:40 -05:00
Sam 2437b0d531 FIX: regression, missing 404 page 2018-01-23 09:00:28 +11:00
Sam f26ff290c3 FEATURE: Shorten setting name to max_reqs
So it is consistent with other settings
2018-01-22 13:18:30 +11:00
Sam 8bf91b8dca correct tracking of x runtime 2018-01-19 17:51:19 +11:00
Sam 8ad43f01c2 FIX: correctly log topic timings as background 2018-01-19 10:37:43 +11:00
Sam 12872d03be PERF: run post timings in background
This means that if a very large amount of registered users hit
a single topic we will handle it gracefully, even if db gets slow.
2018-01-19 08:27:29 +11:00
Sam 442a17bfb2 PERF: bypass omniauth unless in an auth path 2018-01-15 12:44:54 +11:00
Sam 49ed382c2a FIX: return 429 when admin api key is limited on admin route
This also handles a general case where exceptions leak out prior to being handled by the application controller
2018-01-12 14:15:26 +11:00
Sam cecd7d0d07 FEATURE: global rate limiter can bypass local IPs 2018-01-08 08:39:17 +11:00
Sam 715cb98e95 add better diagnostics for rate limits 2018-01-05 12:14:28 +11:00
Sam bbc606988f improve message 2017-12-20 10:12:33 +11:00
Sam 4986ebcf24 FEATURE: optional default off global per ip rate limiter 2017-12-11 17:52:57 +11:00
Sam df84e1c358 Correctly track hijacked requests 2017-11-28 16:47:20 +11:00
Sam a4c539bade FEATURE: Allow registration of detailed request logger
Detailed request loggers can be used to gather rich timing info
from all requests (which in turn can be forwarded to monitoring solution)

Middleware::RequestTracker.detailed_request_logger(->|env, data| do
   # do stuff with env and data
end
2017-10-18 12:10:30 +11:00
Guo Xiang Tan 5012d46cbd Add rubocop to our build. (#5004) 2017-07-28 10:20:09 +09:00
Sam bdb848b4f3 Split the theme_key so we extract the key from seq 2017-06-15 14:09:44 -04:00
Sam ac1f84d3e1 SECURITY: theme key should be an anon cache breaker 2017-06-15 09:36:27 -04:00
Sam a3e8c3cd7b FEATURE: Native theme support
This feature introduces the concept of themes. Themes are an evolution
of site customizations.

Themes introduce two very big conceptual changes:

- A theme may include other "child themes", children can include grand
children and so on.

- A theme may specify a color scheme

The change does away with the idea of "enabled" color schemes.

It also adds a bunch of big niceties like

- You can source a theme from a git repo

- History for themes is much improved

- You can only have a single enabled theme. Themes can be selected by
    users, if you opt for it.

On a technical level this change comes with a whole bunch of goodies

- All CSS is now compiled using a custom pipeline that uses libsass
    see /lib/stylesheet

- There is a single pipeline for css compilation (in the past we used
    one for customizations and another one for the rest of the app

- The stylesheet pipeline is now divorced of sprockets, there is no
   reliance on sprockets for CSS bundling

- CSS is generated with source maps everywhere (including themes) this
    makes debugging much easier

- Our "live reloader" is smarter and avoid a flash of unstyled content
   we run a file watcher in "puma" in dev so you no longer need to run
   rake autospec to watch for CSS changes
2017-04-12 10:53:49 -04:00
Sam ea9f7a41af remove gctools (no longer used) add gctracer for debugging 2016-12-20 15:07:30 +11:00
Sam 39a524aac8 FEATURE: brotli cdn bypass for assets
Allow CDNS that strip out brotli encoding to use brotli regardless
2016-12-05 13:57:09 +11:00
Sam 497ff76a67 make sure 1 is a string 2016-10-27 18:08:01 +11:00
Sam 3e7190866a make code a bit safer 2016-10-27 16:50:56 +11:00
Sam 8a477f1857 FEATURE: added X-Discourse-TrackView header
This header is set to 1 if the particular request is a tracked page view
2016-10-27 16:48:27 +11:00
Robin Ward a9823ab59a FIX: Use a cookie to bypass the anon cache 2015-10-28 17:16:56 -04:00
Sam ec4a1bb2c4 FIX: page tracking was not properly tracking transitions
PERF: move closure to self contained method so env is released earlier.
2015-09-17 11:06:33 +10:00
Régis Hanol d7aa4e81d6 revert 8f435fcbf6 2015-07-31 15:22:30 +02:00
Neil Lalonde 86cd1a19cc FEATURE: page view stats for mobile view 2015-07-03 17:19:33 -04:00
Sam 1f9761e85d FEATURE: add a header to denote an anonymous req was cached
(X-Discourse-Cached)
2015-06-16 10:30:06 +10:00
Sam 90eaad336d FEATURE: allow users to pick a CDN for s3 assets 2015-05-26 11:13:12 +10:00
Régis Hanol bb0c2813ac FEATURE: generate (avatar) thumbnails in a background task
FIX: keep the "uploading..." indicator until the server replies via the MessageBus
FIX: text was disapearing when uploading an avatar

PERF: always use a region for S3 (defaults to 'us-east-1')
FEATURE: ApplyCDN middleware when using S3
FIX: use the same pattern to store files on S3 and locally
PERF: keep a local cache of uploads when generating thumbnails
FEATURE: migrate_to_s3 rake task
2015-05-25 17:59:00 +02:00
Sam f5af4768eb FEATURE: add clean support for running Discourse in a subfolder
To setup set DISCOURSE_RELATIVE_URL_ROOT to the folder you wish
2015-03-09 13:14:29 +11:00
Sam cbe18eb0df FEATURE: allow view exclusion using custom header
Set Discourse-Track-View to either "0" or "false" to exclude request
2015-02-26 11:41:11 +11:00
Sam fce9e296e7 background reqs failed or not are always counted seperately 2015-02-12 09:47:46 +11:00
Sam 3cf87b94c9 whitespace 2015-02-11 09:39:04 +11:00
Sam 0ce6524153 correct brokeness 2015-02-10 17:05:24 +11:00
Sam acda6ebd60 FIX: view tracking needs to release data earlier
retaining data during queuing was causing huge memory spikes
2015-02-10 17:03:33 +11:00
Sam 820ce8765e refactor traffic report
split traffic report in 2, page view vs raw traffic
hide raw traffic report by default
improve flushing logic for application reqs
2015-02-06 14:39:16 +11:00
Sam 08b790b3c2 improve metrics gathered using in our traffic section
this also pulls out the middleware into its own home and inserts in front
2015-02-05 16:08:52 +11:00
Sam 8690c7c49f defer counting to avoid race condition 2015-02-05 12:19:21 +11:00
Sam c150c55e2d FEATURE: rudimentary view tracking wired in 2015-02-04 16:15:16 +11:00
Sam 4f8dfd84b9 FIX: vary accept for cache, seems most correct 2014-09-09 10:25:49 +10:00
Sam 8646c21e89 FIX: anonymous cache could cache json for html requests 2014-09-09 09:46:26 +10:00
Akshay 6301a43d57 Not initializing variable for looping if unused in loop 2014-08-15 03:24:55 +05:30
Sam 6019e3f257 FIX: remove hardcoding from middleware stack so we can control it 2014-07-10 17:01:21 +10:00
Sam 5032c96486 FIX: disable x accl redirect for CDN assets
We need to keep headers in tact
2014-07-10 16:32:46 +10:00
Sam 35952055e2 BUGFIX: web crawlers messing with anon caching 2014-04-29 10:48:09 +10:00