[973] | 1 | # PyKota |
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| 2 | # |
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| 3 | # PyKota : Print Quotas for CUPS and LPRng |
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| 4 | # |
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| 5 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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| 6 | # This program is free software; you can redistribute it and/or modify |
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| 7 | # it under the terms of the GNU General Public License as published by |
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| 8 | # the Free Software Foundation; either version 2 of the License, or |
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| 9 | # (at your option) any later version. |
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| 10 | # |
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| 11 | # This program is distributed in the hope that it will be useful, |
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | # GNU General Public License for more details. |
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| 15 | # |
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| 16 | # You should have received a copy of the GNU General Public License |
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| 17 | # along with this program; if not, write to the Free Software |
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| 18 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | # |
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| 20 | # $Id$ |
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| 21 | # |
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| 22 | # $Log$ |
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| 23 | # Revision 1.1 2003/04/29 18:37:54 jalet |
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| 24 | # Pluggable accounting methods (actually doesn't support external scripts) |
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| 25 | # |
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| 26 | # |
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| 27 | # |
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| 28 | |
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| 29 | class PyKotaAccounterError(Exception): |
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| 30 | """An exception for Accounter related stuff.""" |
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| 31 | def __init__(self, message = ""): |
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| 32 | self.message = message |
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| 33 | Exception.__init__(self, message) |
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| 34 | def __repr__(self): |
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| 35 | return self.message |
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| 36 | __str__ = __repr__ |
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| 37 | |
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| 38 | class AccounterBase : |
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| 39 | """A class to account print usage by querying printers.""" |
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| 40 | def __init__(self, kotafilter) : |
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| 41 | """Sets instance vars depending on the current printer.""" |
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| 42 | self.filter = kotafilter |
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| 43 | |
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| 44 | def doAccounting(self, printerid, userid) : |
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| 45 | """Does the real accounting.""" |
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| 46 | raise PyKotaAccounterError, "Accounter not implemented !" |
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| 47 | |
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| 48 | def openAccounter(kotafilter) : |
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| 49 | """Returns a connection handle to the appropriate accounter.""" |
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| 50 | backend = kotafilter.config.getAccounterBackend(kotafilter.printername) |
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| 51 | try : |
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| 52 | if not backend.isalpha() : |
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| 53 | # don't trust user input |
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| 54 | raise ImportError |
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| 55 | exec "from pykota.accounters import %s as accounterbackend" % backend.lower() |
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| 56 | except ImportError : |
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| 57 | raise PyKotaAccounterError, _("Unsupported accounter backend %s") % backend |
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| 58 | else : |
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| 59 | return getattr(accounterbackend, "Accounter")(kotafilter) |
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