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dendrite/clientapi
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Kegsay c31cb02271
bugfix: Fix a race condition when creating guest accounts (#882) 
* bugfix: Fix a race condition when creating guest accounts

It was possible to both select the same next numeric ID and then both
attempt to INSERT this into the table. This would cause a UNIQUE violation
which then presented itself as an error in sqlite because it does not
implement `common.IsUniqueConstraintViolationErr`.

The fix here is NOT to implement `common.IsUniqueConstraintViolationErr`
otherwise the 2 users would get the SAME guest account. Instead, all of
these operations should be done inside a transaction. This is what this
PR does.

* Update postgres

* Typo

* Actually use the txn when creating accounts

* bugfix for database is locked on guest reg
2020-03-06 18:00:07 +00:00
..
auth bugfix: Fix a race condition when creating guest accounts (#882) 2020-03-06 18:00:07 +00:00
consumers Support sqlite in addition to postgres (#869) 2020-02-13 17:27:33 +00:00
httputil Remove httputil.LogThenError so that the line numbers are reported properly - make error reporting slightly more useful (#879) 2020-03-02 16:20:44 +00:00
jsonerror Fix pipeline, emoji and syntax (#713) 2019-06-19 14:05:03 +01:00
producers use go module for dependencies (#594) 2019-05-21 21:56:55 +01:00
routing bugfix: Fix a race condition when creating guest accounts (#882) 2020-03-06 18:00:07 +00:00
threepid Support sqlite in addition to postgres (#869) 2020-02-13 17:27:33 +00:00
userutil use go module for dependencies (#594) 2019-05-21 21:56:55 +01:00
clientapi.go Support sqlite in addition to postgres (#869) 2020-02-13 17:27:33 +00:00
README.md use go module for dependencies (#594) 2019-05-21 21:56:55 +01:00

README.md

This component roughly corresponds to "Client Room Send" and "Client Sync" on the WIRING diagram. This component produces multiple binaries.

Internals

  • HTTP routing is done using gorilla/mux and the routing paths are in the routing package.

Writers

  • Each HTTP "write operation" (/createRoom, /rooms/$room_id/send/$type, etc) is contained entirely to a single file in the writers package.
  • This file contains the request and response struct definitions, as well as a Validate() bool function to validate incoming requests.
  • The entry point for each write operation is a stand-alone function as this makes testing easier. All dependencies should be injected into this function, including server keys/name, etc.