[d04a689] | 1 | import BaseHTTPServer |
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[b2e077a] | 2 | import gutenbach.ipp as ipp |
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[287d6ec] | 3 | import gutenbach.ipp.constants as const |
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[b2e077a] | 4 | from gutenbach.server.printer import GutenbachPrinter |
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| 5 | from gutenbach.server.exceptions import MalformedIPPRequestException |
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[287d6ec] | 6 | import logging |
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| 7 | |
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[d04a689] | 8 | # initialize logger |
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| 9 | logger = logging.getLogger(__name__) |
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[287d6ec] | 10 | |
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| 11 | def handler_for(operation): |
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| 12 | """A decorator method to mark a function with the operation id |
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| 13 | that it handles. This value will be stored in |
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| 14 | 'func.ipp_operation'. |
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| 15 | |
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| 16 | """ |
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| 17 | |
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| 18 | def f(func): |
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| 19 | func.ipp_operation = operation |
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| 20 | return func |
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| 21 | return f |
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| 22 | |
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[b2e077a] | 23 | class GutenbachRequestHandler(object): |
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[287d6ec] | 24 | |
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[b2e077a] | 25 | def __init__(self): |
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| 26 | self.printers = { |
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| 27 | "test": GutenbachPrinter(name="test") |
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| 28 | } |
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| 29 | self.default = "test" |
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[287d6ec] | 30 | |
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[b2e077a] | 31 | def handle(self, request, response): |
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| 32 | # look up the handler |
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| 33 | handler = None |
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[287d6ec] | 34 | for d in dir(self): |
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| 35 | if getattr(getattr(self, d), "ipp_operation", None) == request.operation_id: |
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[b2e077a] | 36 | handler = getattr(self, d) |
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| 37 | break |
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| 38 | # we couldn't find a handler, so default to unknown operation |
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| 39 | if handler is None: |
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| 40 | handler = self.unknown_operation |
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| 41 | # call the handler |
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| 42 | handler(request, response) |
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[287d6ec] | 43 | |
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| 44 | def unknown_operation(self, request, response): |
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[b2e077a] | 45 | print "Received unknown operation %x" % request.operation_id |
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[287d6ec] | 46 | response.operation_id = const.StatusCodes.OPERATION_NOT_SUPPORTED |
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| 47 | |
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[b2e077a] | 48 | def _get_printer_attributes(self, printer, request, response): |
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| 49 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 50 | const.AttributeTags.PRINTER, |
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| 51 | printer.get_printer_attributes(request))) |
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[287d6ec] | 52 | |
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[b2e077a] | 53 | def _get_job_attributes(self, job_id, printer, request, response): |
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| 54 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 55 | const.AttributeTags.JOB, |
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| 56 | job.get_job_attributes(request))) |
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| 57 | |
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| 58 | def _get_printer_name(self, request): |
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| 59 | # make sure the first group is an OPERATION group |
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| 60 | group_tag = request.attribute_groups[0].tag |
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| 61 | if group_tag != const.AttributeTags.OPERATION: |
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| 62 | raise MalformedIPPRequestException, \ |
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| 63 | "Expected OPERATION group tag, got %d\n", group_tag |
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| 64 | |
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| 65 | # make sure the printer-uri value is appropriate |
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| 66 | printername_attr = request.attribute_groups[0]['printer-uri'] |
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| 67 | printername_value_tag = printername_attr.values[0].value_tag |
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| 68 | if printername_value_tag != const.CharacterStringTags.URI: |
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| 69 | raise MalformedIPPRequestException, \ |
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| 70 | "Expected URI value tag, got %s" % printername_value_tag |
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| 71 | |
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| 72 | # actually get the printer name |
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| 73 | printername_value = printername_attr.values[0].value |
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| 74 | # XXX: hack -- CUPS will strip the port from the request, so |
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| 75 | # we can't do an exact comparison (also the hostname might be |
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| 76 | # different, depending on the CNAME or whether it's localhost) |
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| 77 | printername = printername_value.split("/")[-1] |
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| 78 | |
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| 79 | # make sure the printername is valid |
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| 80 | if printername not in self.printers: |
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| 81 | raise ValueError, "Invalid printer uri: %s" % printername_value |
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| 82 | |
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| 83 | return printername |
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| 84 | |
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| 85 | @handler_for(const.Operations.CUPS_GET_DEFAULT) |
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| 86 | def cups_get_default(self, request, response): |
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| 87 | print "get_default called" |
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| 88 | self._get_printer_attributes(self.printers[self.default], request, response) |
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| 89 | response.operation_id = const.StatusCodes.OK |
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[287d6ec] | 90 | |
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| 91 | @handler_for(const.Operations.GET_PRINTER_ATTRIBUTES) |
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| 92 | def get_printer_attributes(self, request, response): |
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| 93 | print "get_printer_attributes called" |
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| 94 | |
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[b2e077a] | 95 | # this is just like cups_get_default, except the printer name |
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| 96 | # is given |
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| 97 | printername = self._get_printer_name(request) |
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| 98 | self._get_printer_attributes(self.printers[printername], request, response) |
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| 99 | response.operation_id = const.StatusCodes.OK |
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[287d6ec] | 100 | |
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| 101 | @handler_for(const.Operations.CUPS_GET_PRINTERS) |
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| 102 | def cups_get_printers(self, request, response): |
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| 103 | print "get_printers called" |
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[b2e077a] | 104 | |
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[287d6ec] | 105 | # Each printer will append a new printer attribute group. |
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[b2e077a] | 106 | for printer in self.printers: |
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| 107 | self._get_printer_attributes(self.printers[printer], request, response) |
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| 108 | response.operation_id = const.StatusCodes.OK |
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[287d6ec] | 109 | |
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| 110 | @handler_for(const.Operations.CUPS_GET_CLASSES) |
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| 111 | def cups_get_classes(self, request, response): |
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| 112 | print "get_classes called" |
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| 113 | response.operation_id = const.StatusCodes.OK |
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| 114 | # We have no printer classes, so nothing to return. |
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| 115 | |
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[b2e077a] | 116 | @handler_for(const.Operations.GET_JOBS) |
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| 117 | def get_jobs(self, request, response): |
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| 118 | print "get_jobs called" |
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| 119 | |
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| 120 | printername = self._get_printer_name(request) |
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| 121 | # Each job will append a new job attribute group. |
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| 122 | for job in self.printers[printername].get_jobs(): |
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| 123 | self._get_job_attributes(job, request, response) |
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| 124 | response.operation_id = const.StatusCodes.OK |
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| 125 | |
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| 126 | class GutenbachIPPServer(BaseHTTPServer.BaseHTTPRequestHandler): |
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[287d6ec] | 127 | def setup(self): |
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[b2e077a] | 128 | self.root = GutenbachRequestHandler() |
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[287d6ec] | 129 | BaseHTTPServer.BaseHTTPRequestHandler.setup(self) |
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| 130 | |
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| 131 | def handle_one_request(self): |
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| 132 | self.raw_requestline = self.rfile.readline() |
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| 133 | if not self.raw_requestline: |
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| 134 | self.close_connection = 1 |
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| 135 | return |
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| 136 | if not self.parse_request(): # An error code has been sent, just exit |
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| 137 | return |
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| 138 | self.handle_ipp() |
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| 139 | |
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| 140 | def handle_ipp(self): |
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| 141 | # Receive a request |
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| 142 | length = int(self.headers.getheader('content-length', 0)) |
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| 143 | request = ipp.Request(request=self.rfile, length=length) |
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| 144 | print "Received request:", repr(request) |
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| 145 | |
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| 146 | # Attributes |
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| 147 | attributes = [ |
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| 148 | ipp.Attribute( |
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| 149 | 'attributes-charset', |
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| 150 | [ipp.Value(ipp.Tags.CHARSET, 'utf-8')]), |
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| 151 | ipp.Attribute( |
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| 152 | 'attributes-natural-language', |
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| 153 | [ipp.Value(ipp.Tags.NATURAL_LANGUAGE, 'en-us')]) |
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| 154 | ] |
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| 155 | # Attribute group |
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| 156 | attribute_group = ipp.AttributeGroup( |
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| 157 | const.AttributeTags.OPERATION, |
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| 158 | attributes) |
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| 159 | |
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| 160 | # Set up the response |
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| 161 | response_kwargs = {} |
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| 162 | response_kwargs['version'] = request.version |
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| 163 | response_kwargs['operation_id'] = const.StatusCodes.INTERNAL_ERROR |
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| 164 | response_kwargs['request_id'] = request.request_id |
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| 165 | response_kwargs['attribute_groups'] = [attribute_group] |
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| 166 | response = ipp.Request(**response_kwargs) |
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| 167 | |
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| 168 | # Get the handler and pass it the request and response objects |
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[b2e077a] | 169 | self.root.handle(request, response) |
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[287d6ec] | 170 | print "Sending response:", repr(response) |
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| 171 | |
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| 172 | # Send the response across HTTP |
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| 173 | self.send_response(200, "o hai") |
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| 174 | self.send_header("Content-Type", "application/ipp") |
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| 175 | self.send_header("Connection", "close") |
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| 176 | self.end_headers() |
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| 177 | self.wfile.write(response.packed_value) |
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| 178 | |
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| 179 | ##### Printer Commands |
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| 180 | |
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| 181 | def print_job(self, request): |
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| 182 | pass |
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| 183 | |
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| 184 | def validate_job(self, request): |
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| 185 | pass |
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| 186 | |
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| 187 | #def get_jobs(self, request): |
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| 188 | # pass |
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| 189 | |
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| 190 | def print_uri(self, request): |
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| 191 | pass |
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| 192 | |
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| 193 | def create_job(self, request): |
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| 194 | pass |
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| 195 | |
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| 196 | def pause_printer(self, request): |
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| 197 | pass |
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| 198 | |
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| 199 | def resume_printer(self, request): |
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| 200 | pass |
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| 201 | |
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| 202 | def set_printer_attributes(self, request): |
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| 203 | pass |
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| 204 | |
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| 205 | ##### Job Commands |
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| 206 | |
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| 207 | def cancel_job(self, request): |
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| 208 | pass |
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| 209 | |
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| 210 | def get_job_attributes(self, request): |
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| 211 | pass |
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| 212 | |
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| 213 | def send_document(self, request): |
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| 214 | pass |
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| 215 | |
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| 216 | def send_uri(self, request): |
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| 217 | pass |
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| 218 | |
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| 219 | def set_job_attributes(self, request): |
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| 220 | pass |
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| 221 | |
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| 222 | def cups_get_document(self, request): |
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| 223 | pass |
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| 224 | |
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| 225 | def restart_job(self, request): |
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| 226 | pass |
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| 227 | |
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| 228 | def promote_job(self, request): |
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| 229 | pass |
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