Tom Wang
5531da077f
app_client_blocking.py - shortening main and other DRY fixes app_server.py - adding lsock close to cleanup base line secure socket framework
60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Created on Sun Mar 22 10:43:35 2020
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@author: cpan
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"""
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import sys
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import socket
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import selectors
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import traceback
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import libserver
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sel = selectors.DefaultSelector()
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def accept_wrapper(sock):
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conn, addr = sock.accept() # Should be ready to read
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print("accepted connection from", addr)
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conn.setblocking(False)
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message = libserver.Message(sel, conn, addr)
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sel.register(conn, selectors.EVENT_READ, data=message)
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if len(sys.argv) != 3:
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print("usage:", sys.argv[0], "<host> <port>")
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sys.exit(1)
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host, port = sys.argv[1], int(sys.argv[2])
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lsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# Avoid bind() exception: OSError: [Errno 48] Address already in use
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lsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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lsock.bind((host, port))
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lsock.listen()
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print("listening on", (host, port))
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lsock.setblocking(False)
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sel.register(lsock, selectors.EVENT_READ, data=None)
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try:
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while True:
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events = sel.select(timeout=None)
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for key, mask in events:
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if key.data is None:
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accept_wrapper(key.fileobj)
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else:
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message = key.data
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try:
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message.process_events(mask)
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except Exception:
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print(
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"main: error: exception for",
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f"{message.addr}:\n{traceback.format_exc()}",
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)
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message.close()
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except KeyboardInterrupt:
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print("caught keyboard interrupt, exiting")
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finally:
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sel.close()
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lsock.close() |