1 | # PyKota |
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2 | # -*- coding: ISO-8859-15 -*- |
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3 | # |
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4 | # PyKota - Print Quotas for CUPS and LPRng |
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5 | # |
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6 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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7 | # This program is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU General Public License as published by |
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9 | # the Free Software Foundation; either version 2 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # This program is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU General Public License |
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18 | # along with this program; if not, write to the Free Software |
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19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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20 | # |
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21 | # $Id$ |
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22 | # |
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23 | # $Log$ |
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24 | # Revision 1.1 2004/05/13 13:59:30 jalet |
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25 | # Code simplifications |
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26 | # |
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27 | # |
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28 | # |
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29 | |
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30 | import sys |
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31 | import os |
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32 | from pykota.accounter import AccounterBase, PyKotaAccounterError |
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33 | from pykota.requester import openRequester, PyKotaRequesterError |
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34 | |
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35 | class Accounter(AccounterBase) : |
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36 | def __init__(self, kotabackend, arguments) : |
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37 | """Initializes querying accounter.""" |
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38 | AccounterBase.__init__(self, kotabackend, arguments) |
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39 | self.requester = openRequester(kotabackend, kotabackend.printername) |
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40 | self.isDelayed = 1 # With the pykota filter, accounting is delayed by one job |
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41 | |
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42 | def getPrinterInternalPageCounter(self) : |
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43 | """Returns the printer's internal page counter.""" |
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44 | self.filter.logdebug("Reading printer's internal page counter...") |
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45 | try : |
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46 | counter = self.requester.getPrinterPageCounter(self.filter.printerhostname) |
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47 | except PyKotaRequesterError, msg : |
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48 | # can't get actual page counter, assume printer is off or warming up |
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49 | # log the message anyway. |
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50 | self.filter.logger.log_message("%s" % msg, "warn") |
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51 | counter = None |
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52 | self.filter.logdebug("Printer's internal page counter value is : %s" % str(counter)) |
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53 | return counter |
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54 | |
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55 | def beginJob(self, userpquota) : |
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56 | """Saves printer internal page counter at start of job.""" |
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57 | # save page counter before job |
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58 | self.LastPageCounter = self.counterbefore = self.getPrinterInternalPageCounter() |
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59 | |
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60 | def endJob(self, userpquota) : |
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61 | """Saves printer internal page counter at end of job.""" |
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62 | # save page counter after job |
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63 | self.LastPageCounter = self.counterafter = self.getPrinterInternalPageCounter() |
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64 | |
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65 | def getJobSize(self) : |
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66 | """Returns the actual job size.""" |
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67 | try : |
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68 | jobsize = (self.counterafter - self.counterbefore) |
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69 | if jobsize < 0 : |
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70 | # Try to take care of HP printers |
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71 | # Their internal page counter is saved to NVRAM |
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72 | # only every 10 pages. If the printer was switched |
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73 | # off then back on during the job, and that the |
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74 | # counters difference is negative, we know |
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75 | # the formula (we can't know if more than eleven |
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76 | # pages were printed though) : |
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77 | if jobsize > -10 : |
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78 | jobsize += 10 |
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79 | else : |
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80 | # here we may have got a printer being replaced |
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81 | # DURING the job. This is HIGHLY improbable ! |
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82 | jobsize = 0 |
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83 | except : |
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84 | # takes care of the case where one counter (or both) was never set. |
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85 | jobsize = 0 |
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86 | return jobsize |
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87 | |
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88 | def doAccounting(self, userpquota) : |
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89 | """Does print accounting and returns if the job status is ALLOW or DENY.""" |
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90 | # Get the page counter directly from the printer itself |
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91 | counterbeforejob = self.getPrinterInternalPageCounter() or 0 |
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92 | |
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93 | # Is the current user allowed to print at all ? |
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94 | action = self.filter.warnUserPQuota(userpquota) |
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95 | |
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96 | # adds the current job to history |
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97 | userpquota.Printer.addJobToHistory(self.filter.jobid, userpquota.User, counterbeforejob, action, filename=self.filter.preserveinputfile, title=self.filter.title, copies=self.filter.copies, options=self.filter.options) |
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98 | return action |
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99 | |
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