66 lines
2.0 KiB
Python
66 lines
2.0 KiB
Python
import contextlib
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import threading
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import time
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import uvicorn
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def asyncio_setup() -> None: # pragma: no cover
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# Set eventloop for win32 setups
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# Reverts a change done in uvicorn 0.15.0 - which now sets the eventloop
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# via policy.
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import sys
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if sys.version_info >= (3, 8) and sys.platform == "win32":
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import asyncio
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import selectors
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selector = selectors.SelectSelector()
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loop = asyncio.SelectorEventLoop(selector)
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asyncio.set_event_loop(loop)
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class UvicornServer(uvicorn.Server):
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"""
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Multithreaded server - as found in https://github.com/encode/uvicorn/issues/742
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Removed install_signal_handlers() override based on changes from this commit:
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https://github.com/encode/uvicorn/commit/ce2ef45a9109df8eae038c0ec323eb63d644cbc6
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Cannot rely on asyncio.get_event_loop() to create new event loop because of this check:
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https://github.com/python/cpython/blob/4d7f11e05731f67fd2c07ec2972c6cb9861d52be/Lib/asyncio/events.py#L638
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Fix by overriding run() and forcing creation of new event loop if uvloop is available
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"""
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def run(self, sockets=None):
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import asyncio
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"""
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Parent implementation calls self.config.setup_event_loop(),
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but we need to create uvloop event loop manually
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"""
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try:
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import uvloop # noqa
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except ImportError: # pragma: no cover
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asyncio_setup()
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else:
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asyncio.set_event_loop(uvloop.new_event_loop())
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try:
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loop = asyncio.get_running_loop()
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except RuntimeError:
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# When running in a thread, we'll not have an eventloop yet.
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loop = asyncio.new_event_loop()
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loop.run_until_complete(self.serve(sockets=sockets))
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@contextlib.contextmanager
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def run_in_thread(self):
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self.thread = threading.Thread(target=self.run)
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self.thread.start()
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while not self.started:
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time.sleep(1e-3)
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def cleanup(self):
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self.should_exit = True
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self.thread.join()
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