| 1 | from .value import Value |
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| 2 | from .attribute import Attribute |
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| 3 | from .attributegroup import AttributeGroup |
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| 4 | from .request import Request |
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| 5 | from .constants import AttributeTags, StatusCodes, operations_attribute_value_tags |
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| 6 | import exceptions as err |
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| 7 | import logging |
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| 8 | |
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| 9 | logger = logging.getLogger(__name__) |
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| 10 | |
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| 11 | def verify_operations(request): |
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| 12 | """Pretty much all requests have the first attribute group for |
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| 13 | operation attributes, and these all have 'attributes-charset' and |
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| 14 | 'attributes-natural-language' as the first two attributes. This |
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| 15 | method just generically verifies that these attributes are there. |
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| 16 | |
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| 17 | """ |
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| 18 | |
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| 19 | # XXX: check version |
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| 20 | if False: |
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| 21 | raise err.VersionNotSupported(str(request.version)) |
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| 22 | |
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| 23 | # check operation id |
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| 24 | if False: |
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| 25 | raise err.OperationNotSupported(str(request.operation_id)) |
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| 26 | |
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| 27 | # check operation attributes tag |
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| 28 | op_attrs = request.attribute_groups[0] |
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| 29 | if op_attrs.tag != AttributeTags.OPERATION: |
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| 30 | raise err.BadRequest( |
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| 31 | "Attribute group does not have OPERATION tag: 0x%x" % op_attrs.tag) |
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| 32 | |
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| 33 | # # check compression |
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| 34 | # if False: |
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| 35 | # raise err.CompressionNotSupported |
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| 36 | |
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| 37 | # # check document format |
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| 38 | # if False: |
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| 39 | # raise err.DocumentFormatNotSupported |
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| 40 | |
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| 41 | # # check document uri |
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| 42 | # if False: |
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| 43 | # raise err.UriSchemeNotSupported |
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| 44 | |
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| 45 | # check charset |
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| 46 | charset_attr = op_attrs.attributes[0] |
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| 47 | if charset_attr.name != 'attributes-charset': |
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| 48 | raise err.BadRequest( |
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| 49 | "Attribute is not attributes-charset: %s" % charset_attr.name) |
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| 50 | if len(charset_attr.values) != 1: |
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| 51 | raise err.BadRequest( |
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| 52 | "Too many values for attributes-charset: %d" % len(charset_attr.values)) |
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| 53 | # check charset value |
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| 54 | charset_value = charset_attr.values[0] |
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| 55 | if charset_value.tag != operations_attribute_value_tags['attributes-charset']: |
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| 56 | raise err.BadRequest( |
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| 57 | "Wrong tag for charset value: 0x%x" % charset_value.tag) |
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| 58 | if charset_value.value != 'utf-8': |
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| 59 | raise err.CharsetNotSupported(str(charset_value.value)) |
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| 60 | |
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| 61 | # check for attributes-natural-language |
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| 62 | natlang_attr = op_attrs.attributes[1] |
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| 63 | if natlang_attr.name != 'attributes-natural-language': |
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| 64 | raise err.BadRequest( |
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| 65 | "Attribute is not attributes-natural-language: %s" % natlang_attr.name) |
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| 66 | if len(charset_attr.values) != 1: |
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| 67 | raise err.BadRequest( |
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| 68 | "Too many values for attributes-natural-language: %s" % len(natlang_attr.values)) |
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| 69 | # check natural language value |
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| 70 | natlang_value = natlang_attr.values[0] |
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| 71 | if natlang_value.tag != operations_attribute_value_tags['attributes-natural-language']: |
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| 72 | raise err.BadRequest( |
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| 73 | "Natural language value does not have NATURAL_LANGUAGE tag: 0x%x" % natlang_value.tag) |
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| 74 | if natlang_value.value != 'en-us': |
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| 75 | raise err.Attributes( |
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| 76 | "Invalid natural language value: %s" % natlang_value.value, [natlang_attr]) |
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| 77 | |
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| 78 | return dict([(attr.name, attr.values) for attr in op_attrs.attributes]) |
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| 79 | |
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| 80 | def verify_printer_uri(values): |
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| 81 | if len(values) != 1: |
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| 82 | raise err.BadRequest( |
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| 83 | "Requesting printer uri attribute has too many values: %d" % len(values)) |
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| 84 | uri_value = values[0] |
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| 85 | if uri_value.tag != operations_attribute_value_tags['printer-uri']: |
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| 86 | raise err.BadRequest( |
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| 87 | "Bad value tag (expected URI): 0x%x" % uri_value_tag) |
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| 88 | |
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| 89 | # actually get the printer name |
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| 90 | # XXX: hack -- CUPS will strip the port from the request, so |
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| 91 | # we can't do an exact comparison (also the hostname might be |
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| 92 | # different, depending on the CNAME or whether it's localhost) |
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| 93 | uri = uri_value.value.split("/")[-1] |
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| 94 | return uri |
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| 95 | |
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| 96 | def verify_requesting_username(values): |
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| 97 | if len(values) != 1: |
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| 98 | raise err.BadRequest( |
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| 99 | "Requesting user name attribute has too many values: %d" % len(values)) |
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| 100 | requser_value = values[0] |
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| 101 | if requser_value.tag != operations_attribute_value_tags['requesting-user-name']: |
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| 102 | raise err.BadRequest( |
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| 103 | "Bad value tag (expected NAME_WITHOUT_LANGUAGE): 0x%x" % requser_value.tag) |
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| 104 | |
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| 105 | return requser_value.value |
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| 106 | |
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| 107 | def make_empty_response(request): |
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| 108 | # Operation attributes -- typically the same for any request |
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| 109 | attributes = [ |
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| 110 | Attribute( |
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| 111 | 'attributes-charset', |
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| 112 | [Value(operations_attribute_value_tags['attributes-charset'], 'utf-8')]), |
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| 113 | Attribute( |
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| 114 | 'attributes-natural-language', |
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| 115 | [Value(operations_attribute_value_tags['attributes-natural-language'], 'en-us')]) |
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| 116 | ] |
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| 117 | # Put the operation attributes in a group |
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| 118 | attribute_group = AttributeGroup( |
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| 119 | AttributeTags.OPERATION, |
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| 120 | attributes) |
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| 121 | |
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| 122 | # Set up the default response -- handlers will override these |
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| 123 | # values if they need to |
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| 124 | response_kwargs = {} |
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| 125 | response_kwargs['version'] = request.version |
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| 126 | response_kwargs['operation_id'] = StatusCodes.OK |
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| 127 | response_kwargs['request_id'] = request.request_id |
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| 128 | response_kwargs['attribute_groups'] = [attribute_group] |
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| 129 | response = Request(**response_kwargs) |
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| 130 | |
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| 131 | return response |
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| 132 | |
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| 133 | #### GET-JOBS |
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| 134 | |
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| 135 | def verify_get_jobs_request(request): |
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| 136 | """RFC 2911 3.2.6.1 Get-Jobs Request |
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| 137 | |
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| 138 | The client submits the Get-Jobs request to a Printer object. |
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| 139 | |
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| 140 | The following groups of attributes are part of the Get-Jobs |
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| 141 | Request: |
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| 142 | |
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| 143 | Group 1: Operation Attributes |
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| 144 | Natural Language and Character Set: |
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| 145 | The 'attributes-charset' and |
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| 146 | 'attributes-natural-language' attributes as described |
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| 147 | in section 3.1.4.1. |
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| 148 | Target: |
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| 149 | The 'printer-uri' (uri) operation attribute which is |
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| 150 | the target for this operation as described in section |
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| 151 | 3.1.5. |
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| 152 | Requesting User Name: |
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| 153 | The 'requesting-user-name' (name(MAX)) attribute |
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| 154 | SHOULD be supplied by the client as described in |
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| 155 | section 8.3. |
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| 156 | 'limit' (integer(1:MAX)): |
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| 157 | The client OPTIONALLY supplies this attribute. The |
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| 158 | Printer object MUST support this attribute. It is an |
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| 159 | integer value that determines the maximum number of |
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| 160 | jobs that a client will receive from the Printer even |
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| 161 | if 'which-jobs' or 'my-jobs' constrain which jobs are |
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| 162 | returned. The limit is a 'stateless limit' in that if |
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| 163 | the value supplied by the client is 'N', then only the |
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| 164 | first 'N' jobs are returned in the Get-Jobs Response. |
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| 165 | There is no mechanism to allow for the next 'M' jobs |
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| 166 | after the first 'N' jobs. If the client does not |
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| 167 | supply this attribute, the Printer object responds |
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| 168 | with all applicable jobs. |
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| 169 | 'requested-attributes' (1setOf type2 keyword): |
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| 170 | The client OPTIONALLY supplies this attribute. The |
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| 171 | Printer object MUST support this attribute. It is a |
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| 172 | set of Job attribute names and/or attribute groups |
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| 173 | names in whose values the requester is |
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| 174 | interested. This set of attributes is returned for |
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| 175 | each Job object that is returned. The allowed |
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| 176 | attribute group names are the same as those defined in |
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| 177 | the Get-Job-Attributes operation in section 3.3.4. If |
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| 178 | the client does not supply this attribute, the Printer |
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| 179 | MUST respond as if the client had supplied this |
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| 180 | attribute with two values: 'job-uri' and 'job-id'. |
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| 181 | 'which-jobs' (type2 keyword): |
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| 182 | The client OPTIONALLY supplies this attribute. The |
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| 183 | Printer object MUST support this attribute. It |
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| 184 | indicates which Job objects MUST be returned by the |
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| 185 | Printer object. The values for this attribute are: |
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| 186 | - 'completed': This includes any Job object whose |
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| 187 | state is 'completed', 'canceled', or 'aborted'. |
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| 188 | - 'not-completed': This includes any Job object whose |
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| 189 | state is 'pending', 'processing', |
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| 190 | 'processing-stopped', or 'pending-held'. |
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| 191 | A Printer object MUST support both values. However, if |
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| 192 | the implementation does not keep jobs in the |
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| 193 | 'completed', 'canceled', and 'aborted' states, then it |
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| 194 | returns no jobs when the 'completed' value is |
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| 195 | supplied. If a client supplies some other value, the |
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| 196 | Printer object MUST copy the attribute and the |
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| 197 | unsupported value to the Unsupported Attributes |
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| 198 | response group, reject the request, and return the |
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| 199 | 'client-error-attributes-or-values-not-supported' |
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| 200 | status code. If the client does not supply this |
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| 201 | attribute, the Printer object MUST respond as if the |
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| 202 | client had supplied the attribute with a value of |
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| 203 | 'not-completed'. |
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| 204 | 'my-jobs' (boolean): |
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| 205 | The client OPTIONALLY supplies this attribute. The |
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| 206 | Printer object MUST support this attribute. It |
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| 207 | indicates whether jobs from all users or just the jobs |
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| 208 | submitted by the requesting user of this request MUST |
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| 209 | be considered as candidate jobs to be returned by the |
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| 210 | Printer object. If the client does not supply this |
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| 211 | attribute, the Printer object MUST respond as if the |
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| 212 | client had supplied the attribute with a value of |
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| 213 | 'false', i.e., jobs from all users. The means for |
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| 214 | authenticating the requesting user and matching the |
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| 215 | jobs is described in section 8. |
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| 216 | |
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| 217 | """ |
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| 218 | |
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| 219 | out = {} |
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| 220 | |
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| 221 | # generic operations verification |
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| 222 | attrs = verify_operations(request) |
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| 223 | |
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| 224 | # requested printer uri |
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| 225 | if 'printer-uri' not in attrs: |
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| 226 | raise err.BadRequest("Missing 'printer-uri' attribute") |
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| 227 | out['printer-uri'] = verify_printer_uri(attrs['printer-uri']) |
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| 228 | |
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| 229 | # requesting username |
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| 230 | if 'requesting-user-name' not in attrs: |
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| 231 | logger.warning("Missing 'requesting-user-name' attribute") |
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| 232 | else: |
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| 233 | out['requesting-user-name'] = verify_requesting_username(attrs['requesting-user-name']) |
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| 234 | |
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| 235 | if 'limit' in attrs: |
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| 236 | out['limit'] = None # XXX |
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| 237 | |
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| 238 | if 'requested-attributes' in attrs: |
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| 239 | out['requested-attributes'] = None # XXX |
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| 240 | |
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| 241 | if 'which-jobs' in attrs: |
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| 242 | out['which-jobs'] = None # XXX |
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| 243 | |
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| 244 | if 'my-jobs' in attrs: |
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| 245 | out['my-jobs'] = None # XXX |
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| 246 | |
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| 247 | return out |
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| 248 | |
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| 249 | def make_get_jobs_response(self, request): |
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| 250 | """RFC 2911: 3.2.6.2 Get-Jobs Response |
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| 251 | |
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| 252 | The Printer object returns all of the Job objects up to the number |
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| 253 | specified by the 'limit' attribute that match the criteria as |
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| 254 | defined by the attribute values supplied by the client in the |
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| 255 | request. It is possible that no Job objects are returned since |
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| 256 | there may literally be no Job objects at the Printer, or there may |
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| 257 | be no Job objects that match the criteria supplied by the |
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| 258 | client. If the client requests any Job attributes at all, there is |
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| 259 | a set of Job Object Attributes returned for each Job object. |
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| 260 | |
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| 261 | It is not an error for the Printer to return 0 jobs. If the |
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| 262 | response returns 0 jobs because there are no jobs matching the |
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| 263 | criteria, and the request would have returned 1 or more jobs |
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| 264 | with a status code of 'successful-ok' if there had been jobs |
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| 265 | matching the criteria, then the status code for 0 jobs MUST be |
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| 266 | 'successful-ok'. |
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| 267 | |
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| 268 | Group 1: Operation Attributes |
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| 269 | Status Message: |
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| 270 | In addition to the REQUIRED status code returned in |
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| 271 | every response, the response OPTIONALLY includes a |
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| 272 | 'status-message' (text(255)) and/or a |
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| 273 | 'detailed-status-message' (text(MAX)) operation |
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| 274 | attribute as described in sections 13 and 3.1.6. |
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| 275 | Natural Language and Character Set: |
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| 276 | The 'attributes-charset' and |
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| 277 | 'attributes-natural-language' attributes as described |
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| 278 | in section 3.1.4.2. |
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| 279 | |
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| 280 | Group 2: Unsupported Attributes |
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| 281 | See section 3.1.7 for details on returning Unsupported |
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| 282 | Attributes. The response NEED NOT contain the |
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| 283 | 'requested-attributes' operation attribute with any |
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| 284 | supplied values (attribute keywords) that were requested |
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| 285 | by the client but are not supported by the IPP object. If |
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| 286 | the Printer object does return unsupported attributes |
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| 287 | referenced in the 'requested-attributes' operation |
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| 288 | attribute and that attribute included group names, such as |
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| 289 | 'all', the unsupported attributes MUST NOT include |
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| 290 | attributes described in the standard but not supported by |
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| 291 | the implementation. |
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| 292 | |
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| 293 | Groups 3 to N: Job Object Attributes |
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| 294 | The Printer object responds with one set of Job Object |
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| 295 | Attributes for each returned Job object. The Printer |
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| 296 | object ignores (does not respond with) any requested |
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| 297 | attribute or value which is not supported or which is |
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| 298 | restricted by the security policy in force, including |
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| 299 | whether the requesting user is the user that submitted the |
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| 300 | job (job originating user) or not (see section |
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| 301 | 8). However, the Printer object MUST respond with the |
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| 302 | 'unknown' value for any supported attribute (including all |
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| 303 | REQUIRED attributes) for which the Printer object does not |
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| 304 | know the value, unless it would violate the security |
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| 305 | policy. See the description of the 'out-of- band' values |
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| 306 | in the beginning of Section 4.1. |
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| 307 | |
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| 308 | Jobs are returned in the following order: |
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| 309 | - If the client requests all 'completed' Jobs (Jobs in the |
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| 310 | 'completed', 'aborted', or 'canceled' states), then the |
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| 311 | Jobs are returned newest to oldest (with respect to |
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| 312 | actual completion time) |
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| 313 | - If the client requests all 'not-completed' Jobs (Jobs in |
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| 314 | the 'pending', 'processing', 'pending-held', and |
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| 315 | 'processing- stopped' states), then Jobs are returned in |
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| 316 | relative chronological order of expected time to |
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| 317 | complete (based on whatever scheduling algorithm is |
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| 318 | configured for the Printer object). |
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| 319 | |
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| 320 | """ |
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| 321 | |
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| 322 | pass |
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| 323 | |
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| 324 | ## GET-PRINTER-ATTRIBUTES |
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| 325 | |
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| 326 | def verify_get_printer_attributes_request(request): |
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| 327 | """RFC 2911: 3.2.5.1 Get-Printer-Attributes Request |
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| 328 | |
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| 329 | The following sets of attributes are part of the Get-Printer- |
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| 330 | Attributes Request: |
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| 331 | |
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| 332 | Group 1: Operation Attributes |
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| 333 | Natural Language and Character Set: |
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| 334 | The 'attributes-charset' and 'attributes-natural-language' |
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| 335 | attributes as described in section 3.1.4.1. |
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| 336 | Target: |
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| 337 | The 'printer-uri' (uri) operation attribute which is the |
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| 338 | target for this operation as described in section 3.1.5. |
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| 339 | Requesting User Name: |
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| 340 | The 'requesting-user-name' (name(MAX)) attribute SHOULD be |
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| 341 | supplied by the client as described in section 8.3. |
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| 342 | 'requested-attributes' (1setOf keyword): |
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| 343 | The client OPTIONALLY supplies a set of attribute names |
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| 344 | and/or attribute group names in whose values the requester |
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| 345 | is interested. The Printer object MUST support this |
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| 346 | attribute. If the client omits this attribute, the |
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| 347 | Printer MUST respond as if this attribute had been |
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| 348 | supplied with a value of 'all'. |
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| 349 | 'document-format' (mimeMediaType): |
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| 350 | The client OPTIONALLY supplies this attribute. The Printer |
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| 351 | object MUST support this attribute. This attribute is |
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| 352 | useful for a Printer object to determine the set of |
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| 353 | supported attribute values that relate to the requested |
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| 354 | document format. The Printer object MUST return the |
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| 355 | attributes and values that it uses to validate a job on a |
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| 356 | create or Validate-Job operation in which this document |
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| 357 | format is supplied. The Printer object SHOULD return only |
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| 358 | (1) those attributes that are supported for the specified |
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| 359 | format and (2) the attribute values that are supported for |
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| 360 | the specified document format. By specifying the document |
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| 361 | format, the client can get the Printer object to eliminate |
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| 362 | the attributes and values that are not supported for a |
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| 363 | specific document format. For example, a Printer object |
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| 364 | might have multiple interpreters to support both |
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| 365 | 'application/postscript' (for PostScript) and 'text/plain' |
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| 366 | (for text) documents. However, for only one of those |
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| 367 | interpreters might the Printer object be able to support |
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| 368 | 'number-up' with values of '1', '2', and '4'. For the |
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| 369 | other interpreter it might be able to only support |
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| 370 | 'number-up' with a value of '1'. Thus a client can use |
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| 371 | the Get-Printer-Attributes operation to obtain the |
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| 372 | attributes and values that will be used to accept/reject a |
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| 373 | create job operation. |
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| 374 | |
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| 375 | If the Printer object does not distinguish between |
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| 376 | different sets of supported values for each different |
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| 377 | document format when validating jobs in the create and |
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| 378 | Validate-Job operations, it MUST NOT distinguish between |
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| 379 | different document formats in the Get-Printer-Attributes |
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| 380 | operation. If the Printer object does distinguish between |
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| 381 | different sets of supported values for each different |
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| 382 | document format specified by the client, this |
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| 383 | specialization applies only to the following Printer |
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| 384 | object attributes: |
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| 385 | |
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| 386 | - Printer attributes that are Job Template attributes |
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| 387 | ('xxx- default' 'xxx-supported', and 'xxx-ready' in the |
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| 388 | Table in Section 4.2), |
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| 389 | |
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| 390 | - 'pdl-override-supported', |
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| 391 | - 'compression-supported', |
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| 392 | - 'job-k-octets-supported', |
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| 393 | - 'job-impressions-supported', |
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| 394 | - 'job-media-sheets-supported', |
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| 395 | - 'printer-driver-installer', |
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| 396 | - 'color-supported', and |
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| 397 | - 'reference-uri-schemes-supported' |
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| 398 | |
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| 399 | The values of all other Printer object attributes |
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| 400 | (including 'document-format-supported') remain invariant |
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| 401 | with respect to the client supplied document format |
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| 402 | (except for new Printer description attribute as |
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| 403 | registered according to section 6.2). |
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| 404 | |
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| 405 | If the client omits this 'document-format' operation |
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| 406 | attribute, the Printer object MUST respond as if the |
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| 407 | attribute had been supplied with the value of the Printer |
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| 408 | object's 'document-format- default' attribute. It is |
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| 409 | RECOMMENDED that the client always supply a value for |
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| 410 | 'document-format', since the Printer object's |
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| 411 | 'document-format-default' may be |
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| 412 | 'application/octet-stream', in which case the returned |
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| 413 | attributes and values are for the union of the document |
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| 414 | formats that the Printer can automatically sense. For |
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| 415 | more details, see the description of the 'mimeMediaType' |
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| 416 | attribute syntax in section 4.1.9. |
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| 417 | |
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| 418 | If the client supplies a value for the 'document-format' |
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| 419 | Operation attribute that is not supported by the Printer, |
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| 420 | i.e., is not among the values of the Printer object's |
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| 421 | 'document-format-supported' attribute, the Printer object |
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| 422 | MUST reject the operation and return the |
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| 423 | 'client-error-document-format-not-supported' status code. |
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| 424 | |
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| 425 | """ |
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| 426 | |
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| 427 | out = {} |
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| 428 | |
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| 429 | # generic operations verification |
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| 430 | attrs = verify_operations(request) |
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| 431 | |
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| 432 | # requested printer uri |
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| 433 | if 'printer-uri' not in attrs: |
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| 434 | raise err.BadRequest("Missing 'printer-uri' attribute") |
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| 435 | out['printer-uri'] = verify_printer_uri(attrs['printer-uri']) |
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| 436 | |
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| 437 | # requesting username |
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| 438 | if 'requesting-user-name' not in attrs: |
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| 439 | logger.warning("Missing 'requesting-user-name' attribute") |
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| 440 | else: |
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| 441 | out['requesting-user-name'] = verify_requesting_username(attrs['requesting-user-name']) |
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| 442 | |
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| 443 | if 'requested-attributes' in attrs: |
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| 444 | out['requested-attributes'] = None # XXX |
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| 445 | |
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| 446 | if 'document-format' in attrs: |
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| 447 | out['document-format'] = None # XXX |
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| 448 | |
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| 449 | return out |
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| 450 | |
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| 451 | |
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| 452 | def make_get_printer_attributes_response(self, request): |
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| 453 | """3.2.5.2 Get-Printer-Attributes Response |
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| 454 | |
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| 455 | The Printer object returns the following sets of attributes as |
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| 456 | part of the Get-Printer-Attributes Response: |
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| 457 | |
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| 458 | Group 1: Operation Attributes |
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| 459 | Status Message: |
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| 460 | In addition to the REQUIRED status code returned in every |
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| 461 | response, the response OPTIONALLY includes a |
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| 462 | 'status-message' (text(255)) and/or a |
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| 463 | 'detailed-status-message' (text(MAX)) operation attribute |
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| 464 | as described in sections 13 and 3.1.6. |
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| 465 | Natural Language and Character Set: |
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| 466 | The 'attributes-charset' and 'attributes-natural-language' |
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| 467 | attributes as described in section 3.1.4.2. |
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| 468 | |
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| 469 | Group 2: Unsupported Attributes |
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| 470 | See section 3.1.7 for details on returning Unsupported |
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| 471 | Attributes. The response NEED NOT contain the |
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| 472 | 'requested-attributes' operation attribute with any supplied |
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| 473 | values (attribute keywords) that were requested by the client |
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| 474 | but are not supported by the IPP object. If the Printer |
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| 475 | object does return unsupported attributes referenced in the |
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| 476 | 'requested-attributes' operation attribute and that attribute |
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| 477 | included group names, such as 'all', the unsupported |
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| 478 | attributes MUST NOT include attributes described in the |
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| 479 | standard but not supported by the implementation. |
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| 480 | |
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| 481 | Group 3: Printer Object Attributes |
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| 482 | This is the set of requested attributes and their current |
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| 483 | values. The Printer object ignores (does not respond with) |
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| 484 | any requested attribute which is not supported. The Printer |
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| 485 | object MAY respond with a subset of the supported attributes |
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| 486 | and values, depending on the security policy in |
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| 487 | force. However, the Printer object MUST respond with the |
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| 488 | 'unknown' value for any supported attribute (including all |
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| 489 | REQUIRED attributes) for which the Printer object does not |
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| 490 | know the value. Also the Printer object MUST respond with the |
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| 491 | 'no-value' for any supported attribute (including all REQUIRED |
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| 492 | attributes) for which the system administrator has not |
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| 493 | configured a value. See the description of the 'out-of-band' |
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| 494 | values in the beginning of Section 4.1. |
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| 495 | |
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| 496 | """ |
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| 497 | pass |
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