| 1 | from gutenbach.server.printer import GutenbachPrinter |
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| 2 | import gutenbach.ipp as ipp |
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| 3 | import logging |
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| 4 | import traceback |
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| 5 | import sys |
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| 6 | |
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| 7 | # initialize logger |
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| 8 | logger = logging.getLogger(__name__) |
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| 9 | |
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| 10 | def handler_for(operation): |
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| 11 | """A decorator method to mark a function with the operation id |
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| 12 | that it handles. This value will be stored in |
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| 13 | 'func.ipp_operation'. |
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| 14 | |
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| 15 | """ |
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| 16 | |
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| 17 | def f(func): |
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| 18 | func.ipp_operation = operation |
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| 19 | return func |
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| 20 | return f |
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| 21 | |
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| 22 | def make_empty_response(request): |
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| 23 | # Operation attributes -- typically the same for any request |
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| 24 | attribute_group = ipp.AttributeGroup( |
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| 25 | ipp.AttributeTags.OPERATION, |
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| 26 | [ipp.AttributesCharset('utf-8'), |
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| 27 | ipp.AttributesNaturalLanguage('en-us')]) |
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| 28 | |
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| 29 | # Set up the default response -- handlers will override these |
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| 30 | # values if they need to |
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| 31 | response_kwargs = {} |
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| 32 | response_kwargs['version'] = request.version |
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| 33 | response_kwargs['operation_id'] = ipp.StatusCodes.OK |
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| 34 | response_kwargs['request_id'] = request.request_id |
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| 35 | response_kwargs['attribute_groups'] = [attribute_group] |
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| 36 | response = ipp.Request(**response_kwargs) |
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| 37 | |
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| 38 | return response |
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| 39 | |
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| 40 | class GutenbachRequestHandler(object): |
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| 41 | |
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| 42 | def __init__(self): |
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| 43 | print "init" |
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| 44 | self.printers = { |
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| 45 | "test": GutenbachPrinter(name="test") |
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| 46 | } |
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| 47 | self.default = "test" |
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| 48 | |
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| 49 | def generic_handle(self, request): |
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| 50 | # check the IPP version number |
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| 51 | if request.version != (1, 1): |
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| 52 | raise ipp.errors.ServerErrorVersionNotSupported(str(request.version)) |
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| 53 | |
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| 54 | # make sure the operation attribute group has the correct tag |
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| 55 | operation = request.attribute_groups[0] |
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| 56 | if operation.tag != ipp.AttributeTags.OPERATION: |
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| 57 | raise ipp.errors.ClientErrorBadRequest( |
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| 58 | "Attribute group does not have OPERATION tag: 0x%x" % operation.tag) |
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| 59 | |
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| 60 | # check charset |
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| 61 | charset_attr = operation.attributes[0] |
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| 62 | expected = ipp.AttributesCharset(charset_attr.values[0].value) |
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| 63 | if charset_attr != expected: |
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| 64 | raise ipp.errors.ClientErrorBadRequest(str(charset_attr)) |
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| 65 | if charset_attr.values[0].value != 'utf-8': |
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| 66 | raise ipp.errors.ClientErrorAttributes(str(charset_attr)) |
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| 67 | |
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| 68 | # check for attributes-natural-language |
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| 69 | natlang_attr = operation.attributes[1] |
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| 70 | expected = ipp.AttributesNaturalLanguage(natlang_attr.values[0].value) |
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| 71 | if natlang_attr != expected: |
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| 72 | raise ipp.errors.ClientErrorBadRequest(str(natlang_attr)) |
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| 73 | if natlang_attr.values[0].value != 'en-us': |
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| 74 | raise ipp.errors.ClientErrorAttributes(str(natlang_attr)) |
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| 75 | |
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| 76 | def handle(self, request): |
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| 77 | # look up the handler |
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| 78 | handler = None |
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| 79 | handler_name = None |
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| 80 | for d in dir(self): |
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| 81 | if getattr(getattr(self, d), "ipp_operation", None) == request.operation_id: |
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| 82 | handler_name = d |
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| 83 | break |
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| 84 | |
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| 85 | # we couldn't find a handler, so default to unknown operation |
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| 86 | if handler_name is None: |
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| 87 | handler_name = "unknown_operation" |
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| 88 | |
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| 89 | # actually get the handler |
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| 90 | handler = getattr(self, handler_name) |
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| 91 | logger.info("Handling request of type '%s'" % handler_name) |
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| 92 | |
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| 93 | # try to handle the request |
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| 94 | try: |
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| 95 | self.generic_handle(request) |
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| 96 | response = make_empty_response(request) |
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| 97 | handler(request, response) |
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| 98 | |
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| 99 | # Handle any errors that occur. If an exception occurs that |
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| 100 | # is an IPP error, then we can get the error code from the |
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| 101 | # exception itself. |
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| 102 | except ipp.errors.IPPException: |
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| 103 | exctype, excval, exctb = sys.exc_info() |
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| 104 | logger.error("%s: %s" % (exctype.__name__, excval.message)) |
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| 105 | response = make_empty_response(request) |
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| 106 | excval.update_response(response) |
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| 107 | |
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| 108 | # If it wasn't an IPP error, then it's our fault, so mark it |
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| 109 | # as an internal server error |
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| 110 | except Exception: |
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| 111 | logger.error(traceback.format_exc()) |
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| 112 | response = make_empty_response(request) |
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| 113 | response.operation_id = ipp.StatusCodes.INTERNAL_ERROR |
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| 114 | |
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| 115 | return response |
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| 116 | |
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| 117 | def unknown_operation(self, request, response): |
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| 118 | logger.warning("Received unknown operation 0x%x" % request.operation_id) |
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| 119 | response = make_empty_response(request) |
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| 120 | response.operation_id = ipp.StatusCodes.OPERATION_NOT_SUPPORTED |
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| 121 | return response |
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| 122 | |
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| 123 | ##### Printer Commands |
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| 124 | |
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| 125 | @handler_for(ipp.OperationCodes.PRINT_JOB) |
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| 126 | def print_job(self, request, response): |
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| 127 | """RFC 2911: 3.2.1 Print-Job Operation |
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| 128 | |
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| 129 | This REQUIRED operation allows a client to submit a print job |
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| 130 | with only one document and supply the document data (rather |
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| 131 | than just a reference to the data). See Section 15 for the |
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| 132 | suggested steps for processing create operations and their |
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| 133 | Operation and Job Template attributes. |
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| 134 | |
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| 135 | Request |
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| 136 | ------- |
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| 137 | Group 1: Operation Attributes |
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| 138 | REQUIRED 'attributes-charset' |
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| 139 | REQUIRED 'attributes-natural-language' |
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| 140 | REQUIRED 'printer-uri' (uri) |
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| 141 | OPTIONAL 'requesting-user-name' (name(MAX)) |
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| 142 | OPTIONAL 'job-name' (name(MAX)) |
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| 143 | OPTIONAL 'ipp-attribute-fidelity' (boolean) |
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| 144 | OPTIONAL 'document-name' (name(MAX)) |
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| 145 | OPTIONAL 'compression' (type3 keyword) |
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| 146 | OPTIONAL 'document-format' (mimeMediaType) |
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| 147 | OPTIONAL 'document-natural-language' (naturalLanguage) |
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| 148 | OPTIONAL 'job-k-octets' (integer(0:MAX)) |
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| 149 | OPTIONAL 'job-impressions' (integer(0:MAX)) |
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| 150 | OPTIONAL 'job-media-sheets' (integer(0:MAX)) |
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| 151 | Group 2: Job Template Attributes |
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| 152 | Group 3: Document Content |
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| 153 | |
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| 154 | Response |
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| 155 | -------- |
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| 156 | Group 1: Operation Attributes |
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| 157 | OPTIONAL 'status-message' (text(255)) |
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| 158 | OPTIONAL 'detailed-status-message' (text(MAX)) |
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| 159 | REQUIRED 'attributes-charset' |
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| 160 | REQUIRED 'attributes-natural-language' |
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| 161 | Group 2: Unsupported Attributes |
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| 162 | Group 3: Job Object Attributes |
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| 163 | REQUIRED 'job-uri' (uri) |
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| 164 | REQUIRED 'job-id' (integer(1:MAX)) |
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| 165 | REQUIRED 'job-state' (type1 enum) |
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| 166 | REQUIRED 'job-state-reasons' (1setOf type2 keyword) |
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| 167 | OPTIONAL 'job-state-message' (text(MAX)) |
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| 168 | OPTIONAL 'number-of-intervening-jobs' (integer(0:MAX)) |
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| 169 | |
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| 170 | """ |
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| 171 | |
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| 172 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 173 | |
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| 174 | @handler_for(ipp.OperationCodes.VALIDATE_JOB) |
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| 175 | def validate_job(self, request, response): |
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| 176 | |
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| 177 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 178 | |
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| 179 | @handler_for(ipp.OperationCodes.GET_JOBS) |
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| 180 | def get_jobs(self, request, response): |
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| 181 | """3.2.6 Get-Jobs Operation |
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| 182 | |
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| 183 | This REQUIRED operation allows a client to retrieve the list |
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| 184 | of Job objects belonging to the target Printer object. The |
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| 185 | client may also supply a list of Job attribute names and/or |
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| 186 | attribute group names. A group of Job object attributes will |
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| 187 | be returned for each Job object that is returned. |
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| 188 | |
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| 189 | This operation is similar to the Get-Job-Attributes operation, |
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| 190 | except that this Get-Jobs operation returns attributes from |
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| 191 | possibly more than one object. |
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| 192 | |
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| 193 | Request |
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| 194 | ------- |
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| 195 | Group 1: Operation Attributes |
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| 196 | REQUIRED 'attributes-charset' |
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| 197 | REQUIRED 'attributes-natural-language' |
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| 198 | REQUIRED 'printer-uri' (uri) |
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| 199 | OPTIONAL 'requesting-user-name' (name(MAX)) |
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| 200 | OPTIONAL 'limit' (integer(1:MAX)) |
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| 201 | OPTIONAL 'requested-attributes' (1setOf type2 keyword) |
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| 202 | OPTIONAL 'which-jobs' (type2 keyword) |
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| 203 | OPTIONAL 'my-jobs' (boolean) |
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| 204 | |
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| 205 | Response |
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| 206 | -------- |
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| 207 | Group 1: Operation Attributes |
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| 208 | OPTIONAL 'status-message' (text(255)) |
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| 209 | OPTIONAL 'detailed-status-message' (text(MAX)) |
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| 210 | REQUIRED 'attributes-charset' |
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| 211 | REQUIRED 'attributes-natural-language' |
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| 212 | Group 2: Unsupported Attributes |
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| 213 | Groups 3 to N: Job Object Attributes |
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| 214 | |
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| 215 | """ |
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| 216 | |
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| 217 | operation = request.attribute_groups[0] |
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| 218 | |
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| 219 | # requested printer uri |
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| 220 | if 'printer-uri' not in operation: |
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| 221 | raise ipp.errors.ClientErrorBadRequest("Missing 'printer-uri' attribute") |
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| 222 | uri_attr = operation['printer-uri'] |
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| 223 | printer_name = uri_attr.values[0].value.split("/")[-1] |
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| 224 | if uri_attr != ipp.PrinterUri(uri_attr.values[0].value): |
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| 225 | raise ipp.errors.ClientErrorBadRequest(str(uri_attr)) |
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| 226 | if printer_name not in self.printers: |
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| 227 | raise ipp.errors.ClientErrorAttributes(str(uri_attr), uri_attr) |
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| 228 | jobs = self.printers[printer_name].get_jobs() |
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| 229 | |
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| 230 | # get the job attributes and add them to the response |
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| 231 | for job in self.printers[printer_name].get_jobs(): |
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| 232 | attrs = job.get_job_attributes(operation) |
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| 233 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 234 | ipp.AttributeTags.JOB, attrs)) |
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| 235 | |
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| 236 | @handler_for(ipp.OperationCodes.PRINT_URI) |
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| 237 | def print_uri(self, request, response): |
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| 238 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 239 | |
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| 240 | @handler_for(ipp.OperationCodes.CREATE_JOB) |
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| 241 | def create_job(self, request, response): |
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| 242 | """RFC 2911: 3.2.4 Create-Job Operation |
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| 243 | |
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| 244 | This OPTIONAL operation is similar to the Print-Job operation |
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| 245 | (section 3.2.1) except that in the Create-Job request, a |
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| 246 | client does not supply document data or any reference to |
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| 247 | document data. Also, the client does not supply any of the |
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| 248 | 'document-name', 'document- format', 'compression', or |
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| 249 | 'document-natural-language' operation attributes. This |
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| 250 | operation is followed by one or more Send-Document or Send-URI |
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| 251 | operations. In each of those operation requests, the client |
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| 252 | OPTIONALLY supplies the 'document-name', 'document-format', |
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| 253 | and 'document-natural-language' attributes for each document |
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| 254 | in the multi-document Job object. |
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| 255 | |
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| 256 | Request |
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| 257 | ------- |
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| 258 | Group 1: Operation Attributes |
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| 259 | REQUIRED 'attributes-charset' |
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| 260 | REQUIRED 'attributes-natural-language' |
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| 261 | REQUIRED 'printer-uri' (uri) |
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| 262 | OPTIONAL 'requesting-user-name' (name(MAX)) |
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| 263 | OPTIONAL 'job-name' (name(MAX)) |
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| 264 | OPTIONAL 'ipp-attribute-fidelity' (boolean) |
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| 265 | OPTIONAL 'job-k-octets' (integer(0:MAX)) |
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| 266 | OPTIONAL 'job-impressions' (integer(0:MAX)) |
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| 267 | OPTIONAL 'job-media-sheets' (integer(0:MAX)) |
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| 268 | Group 2: Job Template Attributes |
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| 269 | |
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| 270 | Response |
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| 271 | -------- |
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| 272 | Group 1: Operation Attributes |
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| 273 | OPTIONAL 'status-message' (text(255)) |
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| 274 | OPTIONAL 'detailed-status-message' (text(MAX)) |
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| 275 | REQUIRED 'attributes-charset' |
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| 276 | REQUIRED 'attributes-natural-language' |
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| 277 | Group 2: Unsupported Attributes |
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| 278 | Group 3: Job Object Attributes |
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| 279 | REQUIRED 'job-uri' (uri) |
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| 280 | REQUIRED 'job-id' (integer(1:MAX)) |
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| 281 | REQUIRED 'job-state' (type1 enum) |
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| 282 | REQUIRED 'job-state-reasons' (1setOf type2 keyword) |
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| 283 | OPTIONAL 'job-state-message' (text(MAX)) |
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| 284 | OPTIONAL 'number-of-intervening-jobs' (integer(0:MAX)) |
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| 285 | |
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| 286 | """ |
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| 287 | |
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| 288 | |
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| 289 | operation = request.attribute_groups[0] |
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| 290 | |
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| 291 | # requested printer uri |
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| 292 | if 'printer-uri' not in operation: |
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| 293 | raise ipp.errors.ClientErrorBadRequest("Missing 'printer-uri' attribute") |
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| 294 | uri_attr = operation['printer-uri'] |
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| 295 | printer_name = uri_attr.values[0].value.split("/")[-1] |
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| 296 | if uri_attr != ipp.PrinterUri(uri_attr.values[0].value): |
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| 297 | raise ipp.errors.ClientErrorBadRequest(str(uri_attr)) |
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| 298 | if printer_name not in self.printers: |
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| 299 | raise ipp.errors.ClientErrorAttributes(str(uri_attr), uri_attr) |
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| 300 | |
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| 301 | # get attributes from the printer and add to response |
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| 302 | job = self.printers[printer_name].create_job(request) |
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| 303 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 304 | ipp.AttributeTags.JOB, job.get_job_attributes(operation))) |
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| 305 | |
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| 306 | @handler_for(ipp.OperationCodes.PAUSE_PRINTER) |
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| 307 | def pause_printer(self, request, response): |
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| 308 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 309 | |
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| 310 | @handler_for(ipp.OperationCodes.RESUME_PRINTER) |
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| 311 | def resume_printer(self, request, response): |
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| 312 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 313 | |
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| 314 | @handler_for(ipp.OperationCodes.GET_PRINTER_ATTRIBUTES) |
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| 315 | def get_printer_attributes(self, request, response): |
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| 316 | """RFC 2911: 3.2.5 Get-Printer-Attributes Operation |
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| 317 | |
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| 318 | This REQUIRED operation allows a client to request the values |
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| 319 | of the attributes of a Printer object. |
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| 320 | |
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| 321 | In the request, the client supplies the set of Printer |
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| 322 | attribute names and/or attribute group names in which the |
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| 323 | requester is interested. In the response, the Printer object |
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| 324 | returns a corresponding attribute set with the appropriate |
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| 325 | attribute values filled in. |
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| 326 | |
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| 327 | Request |
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| 328 | ------- |
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| 329 | |
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| 330 | Group 1: Operation Attributes |
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| 331 | REQUIRED 'attributes-charset' |
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| 332 | REQUIRED 'attributes-natural-language' |
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| 333 | REQUIRED 'printer-uri' (uri) |
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| 334 | OPTIONAL 'requesting-user-name' (name(MAX)) |
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| 335 | OPTIONAL 'requested-attributes' (1setOf type2 keyword) |
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| 336 | OPTIONAL 'document-format' (mimeMediaType) |
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| 337 | |
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| 338 | Response |
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| 339 | -------- |
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| 340 | |
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| 341 | Group 1: Operation Attributes |
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| 342 | OPTIONAL 'status-message' (text(255)) |
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| 343 | OPTIONAL 'detailed-status-message' (text(MAX)) |
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| 344 | REQUIRED 'attributes-charset' |
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| 345 | REQUIRED 'attributes-natural-language' |
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| 346 | Group 2: Unsupported Attributes |
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| 347 | Group 3: Printer Object Attributes |
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| 348 | |
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| 349 | """ |
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| 350 | |
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| 351 | operation = request.attribute_groups[0] |
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| 352 | |
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| 353 | # requested printer uri |
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| 354 | if 'printer-uri' not in operation: |
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| 355 | raise ipp.errors.ClientErrorBadRequest("Missing 'printer-uri' attribute") |
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| 356 | uri_attr = operation['printer-uri'] |
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| 357 | printer_name = uri_attr.values[0].value.split("/")[-1] |
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| 358 | if uri_attr != ipp.PrinterUri(uri_attr.values[0].value): |
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| 359 | raise ipp.errors.ClientErrorBadRequest(str(uri_attr)) |
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| 360 | if printer_name not in self.printers: |
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| 361 | raise ipp.errors.ClientErrorAttributes(str(uri_attr), uri_attr) |
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| 362 | printer = self.printers[printer_name] |
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| 363 | |
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| 364 | # get attributes from the printer and add to response |
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| 365 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 366 | ipp.AttributeTags.PRINTER, printer.get_printer_attributes(operation))) |
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| 367 | |
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| 368 | @handler_for(ipp.OperationCodes.SET_PRINTER_ATTRIBUTES) |
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| 369 | def set_printer_attributes(self, request, response): |
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| 370 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 371 | |
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| 372 | ##### Job Commands |
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| 373 | |
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| 374 | @handler_for(ipp.OperationCodes.CANCEL_JOB) |
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| 375 | def cancel_job(self, request, response): |
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| 376 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 377 | |
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| 378 | @handler_for(ipp.OperationCodes.SEND_DOCUMENT) |
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| 379 | def send_document(self, request, response): |
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| 380 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 381 | |
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| 382 | @handler_for(ipp.OperationCodes.SEND_URI) |
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| 383 | def send_uri(self, request, response): |
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| 384 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 385 | |
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| 386 | @handler_for(ipp.OperationCodes.GET_JOB_ATTRIBUTES) |
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| 387 | def get_job_attributes(self, request, response): |
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| 388 | |
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| 389 | operation = request.attribute_groups[0] |
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| 390 | |
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| 391 | # requested printer uri |
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| 392 | if 'printer-uri' not in operation: |
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| 393 | raise ipp.errors.ClientErrorBadRequest("Missing 'printer-uri' attribute") |
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| 394 | uri_attr = operation['printer-uri'] |
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| 395 | printer_name = uri_attr.values[0].value.split("/")[-1] |
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| 396 | if uri_attr != ipp.PrinterUri(uri_attr.values[0].value): |
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| 397 | raise ipp.errors.ClientErrorBadRequest(str(uri_attr)) |
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| 398 | if printer_name not in self.printers: |
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| 399 | raise ipp.errors.ClientErrorAttributes(str(uri_attr), uri_attr) |
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| 400 | printer = self.printers[printer_name] |
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| 401 | |
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| 402 | if 'job-id' not in operation: |
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| 403 | raise ipp.errors.ClientErrorBadRequest("Missing 'job-id' attribute") |
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| 404 | job_id_attr = operation['job-id'] |
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| 405 | job_id = job_id_attr.values[0].value |
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| 406 | if job_id_attr != ipp.JobId(job_id_attr.values[0].value): |
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| 407 | raise ipp.errors.ClientErrorBadRequest(str(job_id_attr)) |
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| 408 | if job_id not in printer.jobs: |
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| 409 | raise ipp.errors.ClientErrorAttributes(str(job_id_attr)) |
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| 410 | job = printer.get_job(job_id) |
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| 411 | |
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| 412 | # get the job attributes and add them to the response |
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| 413 | attrs = job.get_job_attributes(operation) |
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| 414 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 415 | ipp.AttributeTags.JOB, attrs)) |
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| 416 | |
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| 417 | @handler_for(ipp.OperationCodes.SET_JOB_ATTRIBUTES) |
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| 418 | def set_job_attributes(self, request, response): |
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| 419 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 420 | |
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| 421 | @handler_for(ipp.OperationCodes.RESTART_JOB) |
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| 422 | def restart_job(self, request, response): |
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| 423 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 424 | |
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| 425 | @handler_for(ipp.OperationCodes.PROMOTE_JOB) |
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| 426 | def promote_job(self, request, response): |
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| 427 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 428 | |
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| 429 | ##### CUPS Specific Commands |
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| 430 | |
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| 431 | @handler_for(ipp.OperationCodes.CUPS_GET_DOCUMENT) |
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| 432 | def cups_get_document(self, request, response): |
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| 433 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 434 | |
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| 435 | @handler_for(ipp.OperationCodes.CUPS_GET_DEFAULT) |
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| 436 | def cups_get_default(self, request, response): |
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| 437 | """The CUPS-Get-Default operation (0x4001) returns the default |
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| 438 | printer URI and attributes. |
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| 439 | |
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| 440 | Request |
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| 441 | ------- |
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| 442 | |
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| 443 | Group 1: Operation Attributes |
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| 444 | REQUIRED 'attributes-charset' |
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| 445 | REQUIRED 'attributes-natural-language' |
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| 446 | OPTIONAL 'requested-attributes' (1setOf type2 keyword) |
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| 447 | |
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| 448 | Response |
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| 449 | -------- |
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| 450 | |
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| 451 | Group 1: Operation Attributes |
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| 452 | OPTIONAL 'status-message' (text(255)) |
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| 453 | REQUIRED 'attributes-charset' |
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| 454 | REQUIRED 'attributes-natural-language' |
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| 455 | Group 2: Printer Object Attributes |
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| 456 | |
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| 457 | (Source: http://www.cups.org/documentation.php/spec-ipp.html#CUPS_GET_DEFAULT ) |
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| 458 | |
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| 459 | """ |
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| 460 | |
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| 461 | operation = request.attribute_groups[0] |
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| 462 | printer = self.printers[self.default] |
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| 463 | |
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| 464 | # get attributes from the printer and add to response |
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| 465 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 466 | ipp.AttributeTags.PRINTER, printer.get_printer_attributes(operation))) |
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| 467 | |
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| 468 | @handler_for(ipp.OperationCodes.CUPS_GET_PRINTERS) |
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| 469 | def cups_get_printers(self, request, response): |
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| 470 | """The CUPS-Get-Printers operation (0x4002) returns the |
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| 471 | printer attributes for every printer known to the system. This |
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| 472 | may include printers that are not served directly by the |
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| 473 | server. |
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| 474 | |
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| 475 | (Source: http://www.cups.org/documentation.php/spec-ipp.html#CUPS_GET_PRINTERS ) |
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| 476 | |
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| 477 | """ |
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| 478 | |
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| 479 | operation = request.attribute_groups[0] |
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| 480 | |
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| 481 | # get attributes from the printer and add to response |
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| 482 | for printer in self.printers.values(): |
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| 483 | response.attribute_groups.append(ipp.AttributeGroup( |
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| 484 | ipp.AttributeTags.PRINTER, printer.get_printer_attributes(operation))) |
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| 485 | |
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| 486 | @handler_for(ipp.OperationCodes.CUPS_GET_CLASSES) |
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| 487 | def cups_get_classes(self, request, response): |
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| 488 | """The CUPS-Get-Classes operation (0x4005) returns the printer |
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| 489 | attributes for every printer class known to the system. This |
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| 490 | may include printer classes that are not served directly by |
|---|
| 491 | the server. |
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| 492 | |
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| 493 | Request |
|---|
| 494 | ------- |
|---|
| 495 | |
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| 496 | Group 1: Operation Attributes |
|---|
| 497 | REQUIRED 'attributes-charset' |
|---|
| 498 | REQUIRED 'attributes-natural-language' |
|---|
| 499 | OPTIONAL 'first-printer-name' (name(127)) CUPS 1.2/Mac OS X 10.5 |
|---|
| 500 | OPTIONAL 'limit' (integer (1:MAX)) |
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| 501 | OPTIONAL 'printer-location' (text(127)) CUPS 1.1.7 |
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| 502 | OPTIONAL 'printer-type' (type2 enum) CUPS 1.1.7 |
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| 503 | OPTIONAL 'printer-type-mask' (type2 enum) CUPS 1.1.7 |
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| 504 | OPTIONAL 'requested-attributes' (1setOf keyword) |
|---|
| 505 | OPTOINAL 'requested-user-name' (name(127)) CUPS 1.2/Mac OS X 10.5 |
|---|
| 506 | OPTIONAL 'requested-attributes' (1setOf type2 keyword) |
|---|
| 507 | |
|---|
| 508 | Response |
|---|
| 509 | -------- |
|---|
| 510 | |
|---|
| 511 | Group 1: Operation Attributes |
|---|
| 512 | OPTIONAL 'status-message' (text(255)) |
|---|
| 513 | REQUIRED 'attributes-charset' |
|---|
| 514 | REQUIRED 'attributes-natural-language' |
|---|
| 515 | Group 2: Printer Class Object Attributes |
|---|
| 516 | |
|---|
| 517 | (Source: http://www.cups.org/documentation.php/spec-ipp.html#CUPS_GET_CLASSES ) |
|---|
| 518 | |
|---|
| 519 | """ |
|---|
| 520 | |
|---|
| 521 | raise ipp.errors.ServerErrorOperationNotSupported |
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| 522 | |
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