1 | # PyKota |
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2 | # |
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3 | # PyKota : Print Quotas for CUPS |
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4 | # |
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5 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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6 | # You're welcome to redistribute this software under the |
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7 | # terms of the GNU General Public Licence version 2.0 |
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8 | # or, at your option, any higher version. |
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9 | # |
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10 | # You can read the complete GNU GPL in the file COPYING |
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11 | # which should come along with this software, or visit |
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12 | # the Free Software Foundation's WEB site http://www.fsf.org |
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13 | # |
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14 | # $Id$ |
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15 | # |
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16 | # $Log$ |
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17 | # Revision 1.3 2003/02/05 22:10:29 jalet |
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18 | # Typos |
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19 | # |
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20 | # Revision 1.2 2003/02/05 22:02:22 jalet |
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21 | # __import__ statement didn't work as expected |
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22 | # |
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23 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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24 | # Initial import into CVS |
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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 PyKotaRequesterError(Exception): |
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30 | """An exception for Requester 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 | def openRequester(config, printername) : |
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39 | """Returns a connection handle to the appropriate requester.""" |
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40 | backend = config.getRequesterBackend(printername) |
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41 | try : |
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42 | if not backend.isalpha() : |
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43 | # don't trust user input |
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44 | raise ImportError |
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45 | exec "from pykota.requesters import %s as requesterbackend" % backend.lower() |
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46 | except ImportError : |
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47 | raise PyKotaRequesterError, "Unsupported requester backend %s" % backend |
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48 | else : |
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49 | return getattr(requesterbackend, "Requester")(config, printername) |
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