WIP: Websockets

[matmair]

This PR is heavy WIP!! Do not run this in production

This PR adds ASGI support to the backend setup

• Adds daphne for ASGI support for runserver
• Adds uvicorn_worker to the gunicorn setup to enable handling both WSGI and ASGI
• Adds routing logic for ASGI
• Adds a first async component: PageAttendanceDrawer. This shows other users that are on the same page right now and allows temporary discussions right there

Tasks

Beta Give feedback

1. Add CI testing for ASGI
2. Extend server-api to reflect if websockets are enabled
3. Add setting to disable websockets
4. Extend proxy settings
5. Replace notification polling with websocket
6. Add count of currently online users to page Attendance
7. Only show page attendance if there other attendens

Closes #6262

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[sonarcloud]

Quality Gate passed

Issues
7 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 39.53488% with 52 lines in your changes missing coverage. Please review.

Project coverage is 84.25%. Comparing base (30ab365) to head (d927321).

Files with missing lines	Patch %	Lines
src/backend/InvenTree/web/consumers.py	0.00%	33 Missing ⚠️
...end/src/components/nav/PageAttendanceComponent.tsx	79.48%	8 Missing ⚠️
src/backend/InvenTree/InvenTree/asgi.py	0.00%	7 Missing ⚠️
src/backend/InvenTree/InvenTree/routing.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7724      +/-   ##
==========================================
+ Coverage   83.75%   84.25%   +0.50%     
==========================================
  Files        1143     1148       +5     
  Lines       51084    51252     +168     
  Branches     1790     1794       +4     
==========================================
+ Hits        42787    43184     +397     
- Misses       7836     7857      +21     
+ Partials      461      211     -250     

Flag	Coverage Δ
backend	85.62% <6.38%> (-0.09%)	⬇️
pui	68.98% <79.48%> (+4.16%)	⬆️

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[wolflu05]

Nice that you're starting working on this, this may later can be used to stream the machine status page in real time if there are any changes one e.g. machine states, errors, ...

[matmair]

It will also enable removing polling jobs fully and integrating with mqtt within plugins. Due to changes to the gunicorn config, I am a bit cautious - this should probably be targeted to 0.17.0

[matmair]

@SchrodingersGat @wolflu05 I am facing some issues with CORS on the static icons as seen in recent tests. I can not figure out what is happening here and this is blocking the whole PR as it is failing all PUI tests. Have any of you an idea what this could be?

[wolflu05]

Not sure, it seems that the frontend is hosted on a different port than the server for the playwright tests and cors is not allowed on the server?