75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
import sys
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import logging
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import structio
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# A test to check for asynchronous I/O
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async def serve(bind_address: tuple):
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"""
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Serves asynchronously forever
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:param bind_address: The address to bind the server to represented as a tuple
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(address, port) where address is a string and port is an integer
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"""
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sock = structio.socket.socket()
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await sock.bind(bind_address)
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await sock.listen(5)
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logging.info(f"Serving asynchronously at {bind_address[0]}:{bind_address[1]}")
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async with structio.create_pool() as ctx:
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async with sock:
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while True:
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try:
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conn, address_tuple = await sock.accept()
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logging.info(f"{address_tuple[0]}:{address_tuple[1]} connected")
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await ctx.spawn(handler, conn, address_tuple)
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except Exception as err:
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# Because exceptions just *work*
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logging.info(f"{address_tuple[0]}:{address_tuple[1]} has raised {type(err).__name__}: {err}")
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async def handler(sock: structio.socket.AsyncSocket, client_address: tuple):
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"""
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Handles a single client connection
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:param sock: The AsyncSocket object connected to the client
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:param client_address: The client's address represented as a tuple
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(address, port) where address is a string and port is an integer
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:type client_address: tuple
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"""
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address = f"{client_address[0]}:{client_address[1]}"
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async with sock: # Closes the socket automatically
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await sock.send_all(b"Welcome to the server pal, feel free to send me something!\n")
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while True:
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await sock.send_all(b"-> ")
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data = await sock.receive(1024)
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if not data:
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break
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elif data == b"exit\n":
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await sock.send_all(b"I'm dead dude\n")
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raise TypeError("Oh, no, I'm gonna die!")
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elif data == b"fatal\n":
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await sock.send_all(b"What a dick\n")
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raise KeyboardInterrupt("He told me to do it!")
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logging.info(f"Got: {data!r} from {address}")
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await sock.send_all(b"Got: " + data)
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logging.info(f"Echoed back {data!r} to {address}")
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logging.info(f"Connection from {address} closed")
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if __name__ == "__main__":
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port = int(sys.argv[1]) if len(sys.argv) > 1 else 1501
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logging.basicConfig(
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level=20,
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format="[%(levelname)s] %(asctime)s %(message)s",
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datefmt="%d/%m/%Y %H:%M:%S %p",
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)
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try:
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structio.run(serve, ("localhost", port))
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except (Exception, KeyboardInterrupt) as error: # Exceptions propagate!
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if isinstance(error, KeyboardInterrupt):
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logging.info("Ctrl+C detected, exiting")
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else:
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logging.error(f"Exiting due to a {type(error).__name__}: {error}")
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