DjangoChannelsGraphqlWs

Supported the most recent WebSocket sub-protocol graphql-transport-ws used by Apollo. See the specification https://github.com/enisdenjo/graphql-ws/blob/master/PROTOCOL.md.

• GraphQL parsing and message serialization now perform concurrently by sync_to_async(...,thread_sensitive=False).

WARNING: Release contains backward incompatible changes!

• To suppress/drop subscription notification just return None from the subscription resolver. Previously it was necessary to return special SKIP object which is no longer the case..
• Python 3.8 compatibility brought back. Tests pass OK.

• GraphqlWsConsumer.warn_resolver_timeout removed to avoid mess with user specified middlewares. This functionality can easily be implemented on the library user level by creating a designated middleware.
• GraphqlWsConsumer.middleware accepts an instance of graphql.MiddlewareManager or the list of functions. Same as the argument middleware of graphql.execute method.
• Fixed broken example.

• Invoke synchronous resolvers in the main thread with eventloop. So there is no difference in this aspect with async resolvers. This corresponds to the behavior of the graphql-core library.
• Added example of middleware which offloads synchronous resolvers to the threadpool.
• Fixed bug with GraphQL WrappingTypes like GraphQLNonNull causing exceptions when used as subscription field.
• Fixed broken example.

Broken support of previous Python version brought back.

• DjangoChannelsGraphqlWs has migrated to the recent versions of Django, Channels, and Graphene. All other Python dependencies updated.
• Server outputs a warning to the log when operation/resolver takes longer than specified timeout, which is one second by default. The settings GraphqlWsConsumer.warn_operation_timeout and GraphqlWsConsumer.warn_resolver_timeout allow to tune the timeout or even disable the warning at all.
• If exception raises from the resolver a response now contains a field "extensions.code" with a class name of the exception.
• Added support for async resolvers and middlewares.
• WARNING: This release is not backward compatible with previous ones! The main cause is a major update of Django, Channels, and Graphene, but there are some introduced by the library itself. In particular, context lifetime and content have changed. See README.md for details.

• Minor fix in logging.

• Added ability to configure server notification queue limit per subscribtion.

• Switched to Channels 3.
• Python dependencies updated.

• Django channel name added to the context as the channel_name record.
• Python dependencies updated.

Client method 'execute' consumes 'complete' message in case of error.

Logging slightly improved. Thanks to @edouardtheron.

Quadratic growth of threads number has stopped. The problem was observer on Python 3.6 and 3.7 and was not on 3.8, because starting with 3.8 ThreadPoolExecutor does not spawn new thread if there are idle threads in the pool already. The issue was in the fact that for each of worker thread we run an event loop which default executor is the ThreadPoolExecutor with default (by Python) number of threads. All this eventually ended up in hundreds of thread created for each GraphqlWsConsumer subclass.

Python 3.6 compatibility brought back.

Subscription payload now properly serializes the following Python datetime types:

• datetime.datetime
• datetime.date
• datetime.time

• Allow msgpack v1.* in the dependencies requirements.
• Windows support improved: tests fixed, example fixed.
• Development instructions updated in the README.md.
• Removed graphql-core version lock, it is hold by graphene anyway.
• Many CI-related fixes.

• Added support for Python 3.6.
• Dependencies updated and relaxed, now Django 3 is allowed.
• Testing framework improved to run on 3.6, 3.7, 3.8 with Tox.
• Client setup documentation (Python, GraphiQL) improved. Thanks to
  Rigel Kent.
• Error logging added to simplify debugging, error messages improved.
• Fixed wrong year in this changelog (facepalm).
• Configuration management made slightly simple.
• Bandit linter removed as useless.
• More instructions for the package developers in the README.md added.

• Example improved to show how to handle HTTP auth (#23).

• Better error message when Channels channel layer is not available.