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109 lines
3.0 KiB
Python
109 lines
3.0 KiB
Python
# SPDX-License-Identifier: MIT
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# Copyright (C) 2020,2023 The Pybricks Authors
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"""
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:class:`RFCOMMServer` can be used to communicate with other Bluetooth RFCOMM
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devices that don't support the EV3 mailbox protocol.
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It is based on the standard library ``socketserver`` module and attempts to
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remain a strict subset of that implementation when it comes to low-level
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implementation details.
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"""
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from socket import socket, AF_BLUETOOTH, BTPROTO_RFCOMM, SOCK_STREAM
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from socketserver import ThreadingMixIn
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class RFCOMMServer:
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"""
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Object that simplifies setting up an RFCOMM socket server.
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This is based on the ``socketserver.SocketServer`` class in the Python
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standard library.
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"""
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request_queue_size = 1
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def __init__(self, server_address, RequestHandlerClass):
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self.server_address = server_address
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self.RequestHandlerClass = RequestHandlerClass
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self.socket = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
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try:
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self.socket.bind(server_address)
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# self.server_address = self.socket.getsockname()
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self.socket.listen(self.request_queue_size)
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except Exception:
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self.server_close()
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raise
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def __enter__(self):
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return self
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def __exit__(self, type, value, traceback):
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self.server_close()
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def handle_request(self):
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try:
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request, addr_data = self.socket.accept()
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except OSError:
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return
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try:
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self.process_request(request, addr_data)
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except Exception:
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request.close()
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raise
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def process_request(self, request, client_address):
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self.finish_request(request, client_address)
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request.close()
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def finish_request(self, request, client_address):
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self.RequestHandlerClass(request, client_address, self)
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def server_close(self):
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self.socket.close()
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class ThreadingRFCOMMServer(ThreadingMixIn, RFCOMMServer):
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"""
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Version of :class:`RFCOMMServer` that handles connections in a new thread.
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"""
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daemon_threads = True
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class RFCOMMClient:
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def __init__(self, client_address, RequestHandlerClass):
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self.client_address = client_address
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self.RequestHandlerClass = RequestHandlerClass
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self.socket = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)
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def handle_request(self):
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self.socket.connect(self.client_address)
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try:
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self.process_request(self.socket, self.client_address)
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except Exception:
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self.socket.close()
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raise
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def process_request(self, request, client_address):
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self.finish_request(request, client_address)
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request.close()
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def finish_request(self, request, client_address):
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self.RequestHandlerClass(request, client_address, self)
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def client_close(self):
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self.socket.close()
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class ThreadingRFCOMMClient(ThreadingMixIn, RFCOMMClient):
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"""
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Version of :class:`RFCOMMClient` that handles connections in a new thread.
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"""
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daemon_threads = True
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