| 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 1.7 2003/04/23 22:13:57 jalet |
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| 24 | # Preliminary support for LPRng added BUT STILL UNTESTED. |
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| 25 | # |
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| 26 | # Revision 1.6 2003/03/29 13:45:27 jalet |
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| 27 | # GPL paragraphs were incorrectly (from memory) copied into the sources. |
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| 28 | # Two README files were added. |
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| 29 | # Upgrade script for PostgreSQL pre 1.01 schema was added. |
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| 30 | # |
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| 31 | # Revision 1.5 2003/02/10 00:42:17 jalet |
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| 32 | # External requester should be ok (untested) |
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| 33 | # New syntax for configuration file wrt requesters |
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| 34 | # |
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| 35 | # Revision 1.4 2003/02/09 13:05:43 jalet |
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| 36 | # Internationalization continues... |
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| 37 | # |
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| 38 | # Revision 1.3 2003/02/05 22:10:29 jalet |
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| 39 | # Typos |
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| 40 | # |
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| 41 | # Revision 1.2 2003/02/05 22:02:22 jalet |
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| 42 | # __import__ statement didn't work as expected |
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| 43 | # |
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| 44 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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| 45 | # Initial import into CVS |
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| 46 | # |
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| 47 | # |
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| 48 | # |
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| 49 | |
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| 50 | class PyKotaRequesterError(Exception): |
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| 51 | """An exception for Requester related stuff.""" |
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| 52 | def __init__(self, message = ""): |
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| 53 | self.message = message |
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| 54 | Exception.__init__(self, message) |
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| 55 | def __repr__(self): |
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| 56 | return self.message |
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| 57 | __str__ = __repr__ |
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| 58 | |
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| 59 | def openRequester(config, printername) : |
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| 60 | """Returns a connection handle to the appropriate requester.""" |
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| 61 | (backend, args) = config.getRequesterBackend(printername) |
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| 62 | try : |
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| 63 | if not backend.isalpha() : |
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| 64 | # don't trust user input |
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| 65 | raise ImportError |
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| 66 | exec "from pykota.requesters import %s as requesterbackend" % backend.lower() |
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| 67 | except ImportError : |
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| 68 | raise PyKotaRequesterError, _("Unsupported requester backend %s") % backend |
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| 69 | else : |
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| 70 | return getattr(requesterbackend, "Requester")(config, printername, args) |
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