Synapse 1.33.0rc1 (2021-04-28)
==============================

Features
--------

- Update experimental support for [MSC3083](https://github.com/matrix-org/matrix-doc/pull/3083): restricting room access via group membership. ([\#9800](https://github.com/matrix-org/synapse/issues/9800), [\#9814](https://github.com/matrix-org/synapse/issues/9814))
- Add experimental support for handling presence on a worker. ([\#9819](https://github.com/matrix-org/synapse/issues/9819), [\#9820](https://github.com/matrix-org/synapse/issues/9820), [\#9828](https://github.com/matrix-org/synapse/issues/9828), [\#9850](https://github.com/matrix-org/synapse/issues/9850))
- Return a new template when an user attempts to renew their account multiple times with the same token, stating that their account is set to expire. This replaces the invalid token template that would previously be shown in this case. This change concerns the optional account validity feature. ([\#9832](https://github.com/matrix-org/synapse/issues/9832))

Bugfixes
--------

- Fixes the OIDC SSO flow when using a `public_baseurl` value including a non-root URL path. ([\#9726](https://github.com/matrix-org/synapse/issues/9726))
- Fix thumbnail generation for some sites with non-standard content types. Contributed by @rkfg. ([\#9788](https://github.com/matrix-org/synapse/issues/9788))
- Add some sanity checks to identity server passed to 3PID bind/unbind endpoints. ([\#9802](https://github.com/matrix-org/synapse/issues/9802))
- Limit the size of HTTP responses read over federation. ([\#9833](https://github.com/matrix-org/synapse/issues/9833))
- Fix a bug which could cause Synapse to get stuck in a loop of resyncing device lists. ([\#9867](https://github.com/matrix-org/synapse/issues/9867))
- Fix a long-standing bug where errors from federation did not propagate to the client. ([\#9868](https://github.com/matrix-org/synapse/issues/9868))

Improved Documentation
----------------------

- Add a note to the docker docs mentioning that we mirror upstream's supported Docker platforms. ([\#9801](https://github.com/matrix-org/synapse/issues/9801))

Internal Changes
----------------

- Add a dockerfile for running Synapse in worker-mode under Complement. ([\#9162](https://github.com/matrix-org/synapse/issues/9162))
- Apply `pyupgrade` across the codebase. ([\#9786](https://github.com/matrix-org/synapse/issues/9786))
- Move some replication processing out of `generic_worker`. ([\#9796](https://github.com/matrix-org/synapse/issues/9796))
- Replace `HomeServer.get_config()` with inline references. ([\#9815](https://github.com/matrix-org/synapse/issues/9815))
- Rename some handlers and config modules to not duplicate the top-level module. ([\#9816](https://github.com/matrix-org/synapse/issues/9816))
- Fix a long-standing bug which caused `max_upload_size` to not be correctly enforced. ([\#9817](https://github.com/matrix-org/synapse/issues/9817))
- Reduce CPU usage of the user directory by reusing existing calculated room membership. ([\#9821](https://github.com/matrix-org/synapse/issues/9821))
- Small speed up for joining large remote rooms. ([\#9825](https://github.com/matrix-org/synapse/issues/9825))
- Introduce flake8-bugbear to the test suite and fix some of its lint violations. ([\#9838](https://github.com/matrix-org/synapse/issues/9838))
- Only store the raw data in the in-memory caches, rather than objects that include references to e.g. the data stores. ([\#9845](https://github.com/matrix-org/synapse/issues/9845))
- Limit length of accepted email addresses. ([\#9855](https://github.com/matrix-org/synapse/issues/9855))
- Remove redundant `synapse.types.Collection` type definition. ([\#9856](https://github.com/matrix-org/synapse/issues/9856))
- Handle recently added rate limits correctly when using `--no-rate-limit` with the demo scripts. ([\#9858](https://github.com/matrix-org/synapse/issues/9858))
- Disable invite rate-limiting by default when running the unit tests. ([\#9871](https://github.com/matrix-org/synapse/issues/9871))
- Pass a reactor into `SynapseSite` to make testing easier. ([\#9874](https://github.com/matrix-org/synapse/issues/9874))
- Make `DomainSpecificString` an `attrs` class. ([\#9875](https://github.com/matrix-org/synapse/issues/9875))
- Add type hints to `synapse.api.auth` and `synapse.api.auth_blocking` modules. ([\#9876](https://github.com/matrix-org/synapse/issues/9876))
- Remove redundant `_PushHTTPChannel` test class. ([\#9878](https://github.com/matrix-org/synapse/issues/9878))
- Remove backwards-compatibility code for Python versions < 3.6. ([\#9879](https://github.com/matrix-org/synapse/issues/9879))
- Small performance improvement around handling new local presence updates. ([\#9887](https://github.com/matrix-org/synapse/issues/9887))

This reverts commit 05e8c70c.

I went through and removed a bunch of cruft that was lying around for compatibility with old Python versions. This PR also will now prevent Synapse from starting unless you're running Python 3.6+.

This ensures that something like an auth error (403) will be
returned to the requester instead of attempting to try more
servers, which will likely result in the same error, and then
passing back a generic 400 error.

This should be a lot quicker than asking the state handler.

* Simplify `start_listening` callpath

* Correctly check the size of uploaded files

First of all, a fixup to `FakeChannel` which is needed to make it work with the default HTTP channel implementation.

Secondly, it looks like we no longer need `_PushHTTPChannel`, because as of #8013, the producer that gets attached to the `HTTPChannel` is now an `IPushProducer`. This is good, because it means we can remove a whole load of test-specific boilerplate which causes variation between tests and production.

Applied a (slightly modified) patch from https://github.com/matrix-org/synapse/issues/9574.

As far as I understand this would allow the cookie set during the OIDC flow to work on deployments using public baseurls that do not sit at the URL path root.

When receiving a /send_join request for a room with join rules set to 'restricted',
check if the user is a member of the spaces defined in the 'allow' key of the join rules.

This only applies to an experimental room version, as defined in MSC3083.

Fixes #9866.

This is no longer required, since we have dropped support for Python 3.5.

Synapse 1.32.2 (2021-04-22)
===========================

This release includes a fix for a regression introduced in 1.32.0.

Bugfixes
--------

- Fix a regression in Synapse 1.32.0 and 1.32.1 which caused `LoggingContext` errors in plugins. ([\#9857](https://github.com/matrix-org/synapse/issues/9857))

1.32.0 also introduced an incompatibility with Synapse modules that make use of `synapse.logging.context.LoggingContext`, such as [synapse-s3-storage-provider](https://github.com/matrix-org/synapse-s3-storage-provider).

This PR adds a note to the 1.32.0 changelog and upgrade notes about it.

Fixes https://github.com/matrix-org/synapse-s3-storage-provider/issues/55

Synapse 1.32.1 (2021-04-21)
===========================

This release fixes [a regression](https://github.com/matrix-org/synapse/issues/9853) in Synapse 1.32.0 that caused connected Prometheus instances to become unstable. If you ran Synapse 1.32.0 with Prometheus metrics, first upgrade to Synapse 1.32.1 and follow [these instructions](https://github.com/matrix-org/synapse/pull/9854#issuecomment-823472183) to clean up any excess writeahead logs.

Bugfixes
--------

- Fix a regression in Synapse 1.32.0 which caused Synapse to report large numbers of Prometheus time series, potentially overwhelming Prometheus instances. ([\#9854](https://github.com/matrix-org/synapse/issues/9854))