[973] | 1 | # PyKota |
---|
| 2 | # |
---|
| 3 | # PyKota - Print Quotas for CUPS and LPRng |
---|
| 4 | # |
---|
| 5 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
---|
| 6 | # This program is free software; you can redistribute it and/or modify |
---|
| 7 | # it under the terms of the GNU General Public License as published by |
---|
| 8 | # the Free Software Foundation; either version 2 of the License, or |
---|
| 9 | # (at your option) any later version. |
---|
| 10 | # |
---|
| 11 | # This program is distributed in the hope that it will be useful, |
---|
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 14 | # GNU General Public License for more details. |
---|
| 15 | # |
---|
| 16 | # You should have received a copy of the GNU General Public License |
---|
| 17 | # along with this program; if not, write to the Free Software |
---|
| 18 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
---|
| 19 | # |
---|
| 20 | # $Id$ |
---|
| 21 | # |
---|
| 22 | # $Log$ |
---|
[988] | 23 | # Revision 1.3 2003/05/06 14:55:47 jalet |
---|
| 24 | # Missing import ! |
---|
| 25 | # |
---|
[976] | 26 | # Revision 1.2 2003/04/30 13:36:40 jalet |
---|
| 27 | # Stupid accounting method was added. |
---|
| 28 | # |
---|
[973] | 29 | # Revision 1.1 2003/04/29 18:37:54 jalet |
---|
| 30 | # Pluggable accounting methods (actually doesn't support external scripts) |
---|
| 31 | # |
---|
| 32 | # |
---|
| 33 | # |
---|
| 34 | |
---|
[976] | 35 | import sys |
---|
[988] | 36 | import time |
---|
[973] | 37 | from pykota.accounter import AccounterBase, PyKotaAccounterError |
---|
| 38 | from pykota.requester import openRequester, PyKotaRequesterError |
---|
| 39 | |
---|
| 40 | MAXTRIES = 6 # maximum number of tries to get the printer's internal page counter |
---|
| 41 | TIMETOSLEEP = 10 # number of seconds to sleep between two tries to get the printer's internal page counter |
---|
| 42 | |
---|
| 43 | class Accounter(AccounterBase) : |
---|
| 44 | def doAccounting(self, printerid, userid) : |
---|
| 45 | """Does print accounting and returns if the job status is ALLOW or DENY.""" |
---|
| 46 | # Get the page counter directly from the printer itself |
---|
| 47 | # Tries MAXTRIES times, sleeping two seconds each time, in case the printer is sleeping. |
---|
| 48 | # This was seen with my Apple LaserWriter 16/600 PS which doesn't answer before having warmed up. |
---|
| 49 | global MAXTRIES, TIMETOSLEEP |
---|
| 50 | requester = openRequester(self.filter.config, self.filter.printername) |
---|
| 51 | for i in range(MAXTRIES) : |
---|
| 52 | try : |
---|
| 53 | counterbeforejob = requester.getPrinterPageCounter(self.filter.printerhostname) |
---|
| 54 | except PyKotaRequesterError, msg : |
---|
| 55 | # can't get actual page counter, assume printer is off or warming up |
---|
| 56 | # log the message anyway. |
---|
| 57 | self.filter.logger.log_message("%s" % msg, "warn") |
---|
| 58 | counterbeforejob = None |
---|
| 59 | printerIsOff = 1 |
---|
| 60 | else : |
---|
| 61 | # printer answered, it is on so we can exit the loop |
---|
| 62 | printerIsOff = 0 |
---|
| 63 | break |
---|
| 64 | time.sleep(TIMETOSLEEP) |
---|
| 65 | |
---|
| 66 | # get last job information for this printer |
---|
| 67 | pgc = self.filter.storage.getPrinterPageCounter(printerid) |
---|
| 68 | if pgc is None : |
---|
| 69 | # The printer hasn't been used yet, from PyKota's point of view |
---|
| 70 | lasthistoryid = None |
---|
| 71 | lastjobid = self.filter.jobid |
---|
| 72 | lastuserid = userid |
---|
| 73 | lastusername = self.filter.username |
---|
| 74 | lastpagecounter = counterbeforejob |
---|
| 75 | else : |
---|
| 76 | # get last values from Quota Storage |
---|
| 77 | (lasthistoryid, lastjobid, lastuserid, lastusername, lastpagecounter) = (pgc["id"], pgc["jobid"], pgc["userid"], pgc["username"], pgc["pagecounter"]) |
---|
| 78 | |
---|
| 79 | # if printer is off then we assume the correct counter value is the last one |
---|
| 80 | if printerIsOff : |
---|
| 81 | counterbeforejob = lastpagecounter |
---|
| 82 | |
---|
| 83 | # if the internal lifetime page counter for this printer is 0 |
---|
| 84 | # then this may be a printer with a volatile counter (never |
---|
| 85 | # saved to NVRAM) which has just been switched off and then on |
---|
| 86 | # so we use the last page counter from the Quota Storage instead |
---|
| 87 | # explanation at : http://web.mit.edu/source/third/lprng/doc/LPRng-HOWTO-15.html |
---|
| 88 | if counterbeforejob == 0 : |
---|
| 89 | counterbeforejob = lastpagecounter |
---|
| 90 | |
---|
| 91 | # Computes the last job size as the difference between internal page |
---|
| 92 | # counter in the printer and last page counter taken from the Quota |
---|
| 93 | # Storage database for this particular printer |
---|
| 94 | try : |
---|
| 95 | jobsize = (counterbeforejob - lastpagecounter) |
---|
| 96 | except TypeError : |
---|
| 97 | # never used, and internal page counter not accessible |
---|
| 98 | jobsize = 0 |
---|
| 99 | |
---|
| 100 | if jobsize < 0 : |
---|
| 101 | # Probably an HP printer which was switched off and back on, |
---|
| 102 | # its primary counter is only saved in a 10 increment, so |
---|
| 103 | # it may be lower than the last page counter saved in the |
---|
| 104 | # Quota Storage. |
---|
| 105 | # We unconditionnally set the last job's size to |
---|
| 106 | # abs(int((10 - abs(lastcounter(snmp) - lastcounter(storage)) / 2)) |
---|
| 107 | # For more accurate accounting, don't switch off your HP printers ! |
---|
| 108 | # explanation at : http://web.mit.edu/source/third/lprng/doc/LPRng-HOWTO-15.html |
---|
| 109 | self.filter.logger.log_message(_("Error in page count value %i for user %s on printer %s") % (jobsize, lastusername, self.filter.printername), "error") |
---|
| 110 | jobsize = abs(int((10 - abs(jobsize)) / 2)) # Workaround for HP printers' feature ! |
---|
| 111 | |
---|
| 112 | # update the quota for the previous user on this printer |
---|
| 113 | self.filter.storage.updateUserPQuota(lastuserid, printerid, jobsize) |
---|
| 114 | |
---|
| 115 | # update the last job size in the history |
---|
| 116 | self.filter.storage.updateJobSizeInHistory(lasthistoryid, jobsize) |
---|
| 117 | |
---|
| 118 | # warns the last user if he is over quota |
---|
| 119 | self.filter.warnUserPQuota(lastusername, self.filter.printername) |
---|
| 120 | |
---|
| 121 | # Is the current user allowed to print at all ? |
---|
| 122 | action = self.filter.warnUserPQuota(self.filter.username, self.filter.printername) |
---|
| 123 | |
---|
| 124 | # adds the current job to history |
---|
| 125 | self.filter.storage.addJobToHistory(self.filter.jobid, self.filter.storage.getUserId(self.filter.username), printerid, counterbeforejob, action) |
---|
| 126 | |
---|
| 127 | return action |
---|
[976] | 128 | |
---|