Commit Graph

11 Commits

Author SHA1 Message Date
Osama Sayegh b86127ad12
FEATURE: Apply rate limits per user instead of IP for trusted users (#14706)
Currently, Discourse rate limits all incoming requests by the IP address they
originate from regardless of the user making the request. This can be
frustrating if there are multiple users using Discourse simultaneously while
sharing the same IP address (e.g. employees in an office).

This commit implements a new feature to make Discourse apply rate limits by
user id rather than IP address for users at or higher than the configured trust
level (1 is the default).

For example, let's say a Discourse instance is configured to allow 200 requests
per minute per IP address, and we have 10 users at trust level 4 using
Discourse simultaneously from the same IP address. Before this feature, the 10
users could only make a total of 200 requests per minute before they got rate
limited. But with the new feature, each user is allowed to make 200 requests
per minute because the rate limits are applied on user id rather than the IP
address.

The minimum trust level for applying user-id-based rate limits can be
configured by the `skip_per_ip_rate_limit_trust_level` global setting. The
default is 1, but it can be changed by either adding the
`DISCOURSE_SKIP_PER_IP_RATE_LIMIT_TRUST_LEVEL` environment variable with the
desired value to your `app.yml`, or changing the setting's value in the
`discourse.conf` file.

Requests made with API keys are still rate limited by IP address and the
relevant global settings that control API keys rate limits.

Before this commit, Discourse's auth cookie (`_t`) was simply a 32 characters
string that Discourse used to lookup the current user from the database and the
cookie contained no additional information about the user. However, we had to
change the cookie content in this commit so we could identify the user from the
cookie without making a database query before the rate limits logic and avoid
introducing a bottleneck on busy sites.

Besides the 32 characters auth token, the cookie now includes the user id,
trust level and the cookie's generation date, and we encrypt/sign the cookie to
prevent tampering.

Internal ticket number: t54739.
2021-11-17 23:27:30 +03:00
Krzysztof Kotlarek 427d54b2b0 DEV: Upgrading Discourse to Zeitwerk (#8098)
Zeitwerk simplifies working with dependencies in dev and makes it easier reloading class chains. 

We no longer need to use Rails "require_dependency" anywhere and instead can just use standard 
Ruby patterns to require files.

This is a far reaching change and we expect some followups here.
2019-10-02 14:01:53 +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
Guo Xiang Tan 4466fcf1bc FIX: Don't update `User#last_seen_at` when PG is readonly take 2. 2019-01-21 13:49:08 +08:00
Guo Xiang Tan 3b337bfc6b Revert "FIX: Don't rate limit admin and staff constraints when matching routes."
This reverts commit 651b50b1a1.
2018-09-04 14:27:21 +08:00
Guo Xiang Tan 651b50b1a1 FIX: Don't rate limit admin and staff constraints when matching routes.
* When an error is raised when checking route constraints, we
  can only return true/false which either lets the request
  through or return a 404 error. Therefore, we just skip
  rate limiting here and let the controller handle the
  rate limiting.
2018-09-04 13:52:58 +08:00
Robin Ward a8f211bd41 Extensibility for custom staff check 2018-03-28 14:48:14 -04:00
Guo Xiang Tan f7d3702454 FIX: Return 404 if API access is invalid. 2017-08-10 18:27:01 +09:00
Sam 7993845bfa add current_user_provider so people can override current_user bevior cleanly, see
http://meta.discourse.org/t/amending-current-user-logic-in-discourse/10278
2013-10-09 15:11:54 +11:00
nirnanaaa 00c1c4691d there is a scope in User model but not used in staff_constraint 2013-05-29 19:54:23 +02:00
Sam 5ec52bd2e9 :s/moderator?/staff/g ... our naming was kind of crazy, renamed moderator? to staff 2013-05-02 17:22:27 +10:00