| | 134 | def __str__(self) : |
| | 135 | """Returns the parsed IPP message in a readable form.""" |
| | 136 | if not self.parsed : |
| | 137 | return "" |
| | 138 | else : |
| | 139 | buffer = [] |
| | 140 | buffer.append("IPP version : %s" % self.version) |
| | 141 | buffer.append("IPP operation Id : %s" % self.operation_id) |
| | 142 | buffer.append("IPP request Id : %s" % self.request_id) |
| | 143 | for attrtype in self.attributes_types : |
| | 144 | attrdict = getattr(self, "%s_attributes" % attrtype) |
| | 145 | if attrdict : |
| | 146 | buffer.append("%s attributes :" % attrtype.title()) |
| | 147 | for key in attrdict.keys() : |
| | 148 | buffer.append(" %s : %s" % (key, attrdict[key])) |
| | 149 | return "\n".join(buffer) |
| | 150 | |
| | 151 | def dump(self) : |
| | 152 | """Generates an IPP Message. |
| | 153 | |
| | 154 | Returns the message as a string of text. |
| | 155 | """ |
| | 156 | buffer = [] |
| | 157 | if None not in (self.version, self.operation_id, self.request_id) : |
| | 158 | version = [int(p) for p in self.version.split('.')] |
| | 159 | buffer.append(chr(version[0]) + chr(version[1])) |
| | 160 | buffer.append(pack(">H", int(self.operation_id, 16))) |
| | 161 | buffer.append(pack(">I", int(self.request_id, 16))) |
| | 162 | for attrtype in self.attributes_types : |
| | 163 | tagprinted = 0 |
| | 164 | for (attrname, value) in getattr(self, "%s_attributes" % attrtype).items() : |
| | 165 | if not tagprinted : |
| | 166 | buffer.append(chr(self.dictags["%s-attributes-tag" % attrtype])) |
| | 167 | tagprinted = 1 |
| | 168 | if type(value) != type([]) : |
| | 169 | value = [ value ] |
| | 170 | for (vtype, val) in value : |
| | 171 | buffer.append(chr(self.dictags[vtype])) |
| | 172 | buffer.append(pack(">H", len(attrname))) |
| | 173 | buffer.append(attrname) |
| | 174 | if vtype in ("integer", "enum") : |
| | 175 | buffer.append(pack(">H", 4)) |
| | 176 | buffer.append(pack(">I", val)) |
| | 177 | elif vtype == "boolean" : |
| | 178 | buffer.append(pack(">H", 1)) |
| | 179 | buffer.append(chr(val)) |
| | 180 | else : |
| | 181 | buffer.append(pack(">H", len(val))) |
| | 182 | buffer.append(val) |
| | 183 | buffer.append(chr(self.dictags["end-of-attributes-tag"])) |
| | 184 | return "".join(buffer) |
| | 185 | |
| | 186 | def parse(self) : |
| | 187 | """Parses an IPP Message. |
| | 188 | |
| | 189 | NB : Only a subset of RFC2910 is implemented. |
| | 190 | """ |
| | 191 | self._curname = None |
| | 192 | self._curdict = None |
| | 193 | self.version = "%s.%s" % (ord(self.data[0]), ord(self.data[1])) |
| | 194 | self.operation_id = "0x%04x" % unpack(">H", self.data[2:4])[0] |
| | 195 | self.request_id = "0x%08x" % unpack(">I", self.data[4:8])[0] |
| | 196 | self.position = 8 |
| | 197 | endofattributes = self.dictags["end-of-attributes-tag"] |
| | 198 | unsupportedattributes = self.dictags["unsupported-attributes-tag"] |
| | 199 | try : |
| | 200 | tag = ord(self.data[self.position]) |
| | 201 | while tag != endofattributes : |
| | 202 | self.position += 1 |
| | 203 | name = self.tags[tag] |
| | 204 | if name is not None : |
| | 205 | func = getattr(self, name.replace("-", "_"), None) |
| | 206 | if func is not None : |
| | 207 | self.position += func() |
| | 208 | if ord(self.data[self.position]) > unsupportedattributes : |
| | 209 | self.position -= 1 |
| | 210 | continue |
| | 211 | tag = ord(self.data[self.position]) |
| | 212 | except IndexError : |
| | 213 | raise IPPError, "Unexpected end of IPP message." |
| | 214 | |
| | 215 | # Now transform all one-element lists into single values |
| | 216 | for attrtype in self.attributes_types : |
| | 217 | attrdict = getattr(self, "%s_attributes" % attrtype) |
| | 218 | for (key, value) in attrdict.items() : |
| | 219 | if len(value) == 1 : |
| | 220 | attrdict[key] = value[0] |
| | 221 | self.parsed = 1 |
| | 222 | |
| 173 | | |
| 174 | | def parse(self) : |
| 175 | | """Parses an IPP Message. |
| 176 | | |
| 177 | | NB : Only a subset of RFC2910 is implemented. |
| 178 | | """ |
| 179 | | self._curname = None |
| 180 | | self._curdict = None |
| 181 | | self.version = "%s.%s" % (ord(self.data[0]), ord(self.data[1])) |
| 182 | | self.operation_id = "0x%04x" % unpack(">H", self.data[2:4])[0] |
| 183 | | self.request_id = "0x%08x" % unpack(">I", self.data[4:8])[0] |
| 184 | | self.position = 8 |
| 185 | | try : |
| 186 | | tag = ord(self.data[self.position]) |
| 187 | | while tag != END_OF_ATTRIBUTES_TAG : |
| 188 | | self.position += 1 |
| 189 | | name = self.tags[tag] |
| 190 | | if name is not None : |
| 191 | | func = getattr(self, name.replace("-", "_"), None) |
| 192 | | if func is not None : |
| 193 | | self.position += func() |
| 194 | | if ord(self.data[self.position]) > UNSUPPORTED_ATTRIBUTES_TAG : |
| 195 | | self.position -= 1 |
| 196 | | continue |
| 197 | | tag = ord(self.data[self.position]) |
| 198 | | except IndexError : |
| 199 | | raise IPPError, "Unexpected end of IPP message." |
| 200 | | |
| 201 | | # Now transform all one-element lists into single values |
| 202 | | for attrtype in self.attributes_types : |
| 203 | | attrdict = getattr(self, "%s_attributes" % attrtype) |
| 204 | | for (key, value) in attrdict.items() : |
| 205 | | if len(value) == 1 : |
| 206 | | attrdict[key] = value[0] |
| 215 | | print "IPP version : %s" % message.version |
| 216 | | print "IPP operation Id : %s" % message.operation_id |
| 217 | | print "IPP request Id : %s" % message.request_id |
| 218 | | for attrtype in message.attributes_types : |
| 219 | | attrdict = getattr(message, "%s_attributes" % attrtype) |
| 220 | | if attrdict : |
| 221 | | print "%s attributes :" % attrtype.title() |
| 222 | | for key in attrdict.keys() : |
| 223 | | print " %s : %s" % (key, attrdict[key]) |
| | 279 | message.parse() |
| | 280 | |
| | 281 | message2 = IPPMessage(message.dump()) |
| | 282 | message2.parse() |
| | 283 | |
| | 284 | # We now compare the message parsed, and the output |
| | 285 | # of the parsing of the dumped message which was parsed. |
| | 286 | # We sort the results for the test, because the attributes ordering |
| | 287 | # may vary since Python dictionnaries are not sorted. |
| | 288 | strmessage = str(message) |
| | 289 | strmessage2 = str(message2) |
| | 290 | lstmessage = strmessage.split("\n") |
| | 291 | lstmessage.sort() |
| | 292 | lstmessage2 = strmessage2.split("\n") |
| | 293 | lstmessage2.sort() |
| | 294 | if lstmessage == lstmessage2 : |
| | 295 | print "Test OK : parsing original and parsing the output of the dump produce the same result !" |
| | 296 | print strmessage |
| | 297 | else : |
| | 298 | print "Test Failed !" |
| | 299 | print strmessage |
| | 300 | print |
| | 301 | print strmessage2 |
