1 | #! /usr/bin/env python |
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2 | |
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3 | # PyKota accounting filter |
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4 | # |
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5 | # PyKota - Print Quotas for CUPS |
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6 | # |
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7 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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8 | # You're welcome to redistribute this software under the |
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9 | # terms of the GNU General Public Licence version 2.0 |
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10 | # or, at your option, any higher version. |
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11 | # |
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12 | # You can read the complete GNU GPL in the file COPYING |
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13 | # which should come along with this software, or visit |
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14 | # the Free Software Foundation's WEB site http://www.fsf.org |
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15 | # |
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16 | # $Id$ |
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17 | # |
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18 | # $Log$ |
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19 | # Revision 1.8 2003/02/09 12:56:53 jalet |
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20 | # Internationalization begins... |
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21 | # |
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22 | # Revision 1.7 2003/02/07 10:23:48 jalet |
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23 | # Avoid a possible future name clash |
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24 | # |
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25 | # Revision 1.6 2003/02/06 22:54:33 jalet |
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26 | # warnpykota should be ok |
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27 | # |
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28 | # Revision 1.5 2003/02/05 22:45:25 jalet |
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29 | # Forgotten import |
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30 | # |
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31 | # Revision 1.4 2003/02/05 22:42:51 jalet |
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32 | # Typo |
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33 | # |
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34 | # Revision 1.3 2003/02/05 22:38:39 jalet |
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35 | # Typo |
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36 | # |
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37 | # Revision 1.2 2003/02/05 22:16:20 jalet |
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38 | # DEVICE_URI is undefined outside of CUPS, i.e. for normal command line tools |
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39 | # |
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40 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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41 | # Initial import into CVS |
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42 | # |
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43 | # |
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44 | # |
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45 | |
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46 | import sys |
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47 | import os |
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48 | |
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49 | from pykota.tool import PyKotaTool, PyKotaToolError |
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50 | from pykota import requester |
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51 | |
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52 | class PyKotaFilter(PyKotaTool) : |
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53 | """Class for the PyKota filter.""" |
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54 | def __init__(self, username) : |
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55 | PyKotaTool.__init__(self, isfilter=1) |
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56 | self.username = username |
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57 | self.requester = requester.openRequester(self.config, self.printername) |
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58 | self.printerhostname = self.getPrinterHostname() |
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59 | |
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60 | def getPrinterHostname(self) : |
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61 | """Returns the printer hostname.""" |
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62 | device_uri = os.environ.get("DEVICE_URI", "") |
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63 | # TODO : check this for more complex urls than ipp://myprinter.dot.com:631/printers/lp |
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64 | try : |
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65 | (backend, destination) = device_uri.split(":", 1) |
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66 | except ValueError : |
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67 | raise PyKotaToolError, "Invalid DEVICE_URI : %s\n" % device_uri |
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68 | while destination.startswith("/") : |
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69 | destination = destination[1:] |
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70 | return destination.split("/")[0].split(":")[0] |
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71 | |
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72 | def filterInput(self, inputfile) : |
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73 | """Transparent filter.""" |
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74 | mustclose = 0 |
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75 | if inputfile is not None : |
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76 | infile = open(inputfile, "rb") |
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77 | mustclose = 1 |
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78 | else : |
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79 | infile = sys.stdin |
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80 | data = infile.read(256*1024) |
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81 | while data : |
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82 | sys.stdout.write(data) |
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83 | data = infile.read(256*1024) |
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84 | if mustclose : |
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85 | infile.close() |
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86 | |
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87 | def main() : |
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88 | """Do it, and do it right !""" |
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89 | # |
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90 | # This is a CUPS filter, so we should act and die like a CUPS filter when needed |
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91 | narg = len(sys.argv) |
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92 | if narg not in (6, 7) : |
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93 | sys.stderr.write("ERROR: %s job-id user title copies options [file]\n" % sys.argv[0]) |
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94 | return 1 |
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95 | elif narg == 7 : |
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96 | # input file |
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97 | inputfile = sys.argv[6] |
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98 | else : |
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99 | # stdin |
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100 | inputfile = None |
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101 | |
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102 | # |
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103 | # According to CUPS documentation, the username is the third command line argument |
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104 | username = sys.argv[2].strip() |
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105 | |
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106 | # Initializes the current tool |
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107 | kotafilter = PyKotaFilter(username) |
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108 | |
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109 | # Get the page counter directly from the printer itself |
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110 | counterbeforejob = kotafilter.requester.getPrinterPageCounter(kotafilter.printerhostname) # TODO use printername instead, make them match from CUPS' config files |
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111 | |
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112 | # Get the last page counter and last username from the Quota Storage backend |
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113 | pgc = kotafilter.storage.getPrinterPageCounter(kotafilter.printername) |
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114 | if pgc is None : |
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115 | # The printer is unknown from the Quota Storage perspective |
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116 | # we let the job pass through, but log a warning message |
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117 | kotafilter.logger.log_message(_("Printer %s not registered in the PyKota system") % kotafilter.printername, "warn") |
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118 | else : |
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119 | (lastpagecounter, lastusername) = (pgc["pagecounter"], pgc["lastusername"]) |
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120 | |
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121 | # Update the last page counter and last username in the Quota Storage backend |
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122 | # set them to current user and |
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123 | kotafilter.storage.updatePrinterPageCounter(kotafilter.printername, username, counterbeforejob) # TODO : allow or deny users not in quota system, and die cleanly if needed |
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124 | |
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125 | # Is the current user allowed to print at all ? |
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126 | action = kotafilter.warnUserPQuota(username) |
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127 | if action == "DENY" : |
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128 | # No, just die cleanly |
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129 | return 1 |
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130 | |
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131 | # Yes |
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132 | if (lastpagecounter is None) or (lastusername is None) : |
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133 | lastusername = username |
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134 | lastpagecounter = counterbeforejob |
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135 | jobsize = (counterbeforejob - lastpagecounter) |
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136 | if jobsize >= 0: |
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137 | kotafilter.storage.updateUserPQuota(lastusername, kotafilter.printername, jobsize) |
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138 | kotafilter.warnUserPQuota(lastusername) |
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139 | else : |
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140 | kotafilter.logger.log_message(_("Error in page count value %i for user %s on printer %s") % (jobsize, kotafilter.printername, lastusername), "error") |
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141 | |
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142 | # pass the job untouched to the underlying layer |
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143 | kotafilter.filterInput(inputfile) |
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144 | |
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145 | return 0 |
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146 | |
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147 | if __name__ == "__main__" : |
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148 | sys.exit(main() or 0) |
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