Feature request: Timeout option

[caleb15]

Checklist

• There are no similar issues or pull requests for this yet.
• I discussed this idea on the community chat and feedback is positive. (I brought this up twice in chat but only received one response)

Is your feature related to a problem? Please describe.

I want to time out long-running requests to prevent a DDOS attack from happening.

Describe the solution you would like.

A timeout option to end requests after X seconds.

Describe alternatives you considered

• Using Gunicorn, but gunicorn is not needed as we already have a process management system in the form of kubernetes. Also we had an issue with using gunicorn.
• Using Nginx, but if nginx ends the connection the request might still keep on running? (Not sure about this one)
• Timing out the connection in our Django codebase. This can probably be done but it would be nice if it was a default feature of uvicorn so everyone else could easily set it as well.

Additional context

There is precedent for this feature as Uwsgi had this option.

[Kludex]

PR is welcome.

It's one of the features needed for 1.0. :)

I'll consider this as a duplicated of #157, even if it's a subset, and I'll close the issue.