Receives a timeout and returns True if the worker starts serving, or False on exit, shutdown, or timeout.

Install a SIGQUIT handler on workers. - https://github.com/Kludex/uvicorn/issues/1116 - https://github.com/benoitc/gunicorn/issues/26

Parse a forwarded host value into host and optional port. Accepts bare IPs, IPv4 `host:port`, and bracketed IPv6 `[host]:port`. Any unrecogni

Find an unused localhost port from 1024-65535 and return it.

Builds a scope and request message into a WSGI environ object.

Get the default asyncio loop per OS.

Extract the client address from x_forwarded_for header. In general this is the first "untrusted" host in the forwarded for list.

Receives one healthcheck ping and replies with whether the server has finished startup.

Called by the transport when the write buffer drops below the low water mark.

Called by the transport when the write buffer drops below the low water mark.

Wrapper around the ASGI callable, handling exceptions and unexpected termination states.