root / pykota / trunk / pykota / requesters / external.py @ 1257

Revision 1257, 3.0 kB (checked in by jalet, 20 years ago)

Copyright year changed.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
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1# PyKota
2# -*- coding: ISO-8859-15 -*-
3#
4# PyKota - Print Quotas for CUPS and LPRng
5#
6# (c) 2003-2004 Jerome Alet <alet@librelogiciel.com>
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
20#
21# $Id$
22#
23# $Log$
24# Revision 1.10  2004/01/08 14:10:33  jalet
25# Copyright year changed.
26#
27# Revision 1.9  2003/10/07 09:07:29  jalet
28# Character encoding added to please latest version of Python
29#
30# Revision 1.8  2003/07/07 11:49:24  jalet
31# Lots of small fixes with the help of PyChecker
32#
33# Revision 1.7  2003/04/23 22:13:57  jalet
34# Preliminary support for LPRng added BUT STILL UNTESTED.
35#
36# Revision 1.6  2003/03/29 13:45:27  jalet
37# GPL paragraphs were incorrectly (from memory) copied into the sources.
38# Two README files were added.
39# Upgrade script for PostgreSQL pre 1.01 schema was added.
40#
41# Revision 1.5  2003/02/10 11:47:39  jalet
42# Moved some code down into the requesters
43#
44# Revision 1.4  2003/02/10 10:36:33  jalet
45# Small problem wrt external requester
46#
47# Revision 1.3  2003/02/10 00:42:17  jalet
48# External requester should be ok (untested)
49# New syntax for configuration file wrt requesters
50#
51# Revision 1.2  2003/02/09 13:05:43  jalet
52# Internationalization continues...
53#
54# Revision 1.1  2003/02/07 13:15:01  jalet
55# External requester skeleton added.
56#
57#
58#
59
60import os
61from pykota.requester import PyKotaRequesterError
62
63class Requester :
64    """A class to send queries to printers via external commands."""
65    def __init__(self, printername, arguments) :
66        """Sets instance vars depending on the current printer."""
67        self.printername = printername
68        self.commandline = arguments.strip()
69       
70    def getPrinterPageCounter(self, printer) :
71        """Returns the page counter from the printer via an external command.
72       
73           The external command must report the life time page number of the printer on stdout.
74        """
75        commandline = self.commandline % locals()
76        if printer is None :
77            raise PyKotaRequesterError, _("Unknown printer address in EXTERNAL(%s) for printer %s") % (commandline, self.printername)
78        answer = os.popen(commandline)
79        try :
80            pagecounter = int(answer.readline().strip())
81        except ValueError :   
82            raise PyKotaRequesterError, _("Unable to query printer %s via EXTERNAL(%s)") % (printer, commandline) 
83        answer.close()
84        return pagecounter
85       
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