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125 lines
4.0 KiB
125 lines
4.0 KiB
#!/usr/bin/python -OO
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# Copyright 2007-2019 The SABnzbd-Team <team@sabnzbd.org>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""
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sabnzbd.mailslot - Mailslot communication
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"""
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from win32file import GENERIC_WRITE, FILE_SHARE_READ, \
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL
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from ctypes import c_uint, c_buffer, byref, sizeof, windll
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# Win32API Shortcuts
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CreateFile = windll.kernel32.CreateFileA
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ReadFile = windll.kernel32.ReadFile
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WriteFile = windll.kernel32.WriteFile
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CloseHandle = windll.kernel32.CloseHandle
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CreateMailslot = windll.kernel32.CreateMailslotA
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class MailSlot(object):
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""" Simple Windows Mailslot communication """
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slotname = r'mailslot\SABnzbd\ServiceSlot'
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def __init__(self):
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self.handle = -1
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def create(self, timeout):
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""" Create the Mailslot, after this only receiving is possible
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timeout is the read timeout used for receive calls.
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"""
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slot = r'\\.\%s' % MailSlot.slotname
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self.handle = CreateMailslot(slot, 0, timeout, None)
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return self.handle != -1
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def connect(self):
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""" Connect to existing Mailslot so that writing is possible """
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slot = r'\\.\%s' % MailSlot.slotname
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self.handle = CreateFile(slot, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)
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return self.handle != -1
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def disconnect(self):
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""" Disconnect from Mailslot """
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if self.handle != -1:
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CloseHandle(self.handle)
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self.handle = -1
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return True
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def send(self, command):
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""" Send one message to Mailslot """
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if self.handle == -1:
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return False
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w = c_uint()
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return bool(WriteFile(self.handle, command, len(command), byref(w), 0))
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def receive(self):
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""" Receive one message from Mailslot """
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r = c_uint()
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buf = c_buffer(1024)
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if ReadFile(self.handle, buf, sizeof(buf), byref(r), 0):
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return buf.value
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else:
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return None
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##############################################################################
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# Simple test
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#
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# First start "mailslot.py server" in one process,
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# Then start "mailslot.py client" in another.
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# Five "restart" and one "stop" will be send from client to server.
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# The server will stop after receiving "stop"
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##############################################################################
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if __name__ == '__main__':
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import sys
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from time import sleep
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if not __debug__:
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print 'Run this test in non-optimized mode'
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exit(1)
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if len(sys.argv) > 1 and 'server' in sys.argv[1]:
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recv = MailSlot()
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ret = recv.create(2)
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assert ret, 'Failed to create'
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while True:
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data = recv.receive()
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if data is not None:
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print data
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if data.startswith('stop'):
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break
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sleep(2.0)
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recv.disconnect()
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elif len(sys.argv) > 1 and 'client' in sys.argv[1]:
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send = MailSlot()
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ret = send.connect()
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assert ret, 'Failed to connect'
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for n in xrange(5):
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ret = send.send('restart')
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assert ret, 'Failed to send'
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sleep(2.0)
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send.send('stop')
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assert ret, 'Failed to send'
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send.disconnect()
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else:
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print 'Usage: mailslot.py server|client'
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