adds various URI parsers, related constants Signed-off-by: Isaku Yamahata <[email protected]> --- Changes v1 -> v2: - copyright --- ryu/app/wspath.py | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 96 insertions(+), 0 deletions(-) create mode 100644 ryu/app/wspath.py
diff --git a/ryu/app/wspath.py b/ryu/app/wspath.py new file mode 100644 index 0000000..7fe6be0 --- /dev/null +++ b/ryu/app/wspath.py @@ -0,0 +1,96 @@ +# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation. +# Copyright (C) 2012 Isaku Yamahata <yamahata at private email ne jp> +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or +# implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from ryu.app.wsapi import WSPathComponent +from ryu.app.wsapi import WSPathExtractResult + + +def extract_string(pc): + if pc == None: + return WSPathExtractResult(error="End of requested URI") + + return WSPathExtractResult(value=pc) + + +def extract_int(pc, base=10, max_value=None): + if pc == None: + return WSPathExtractResult(error='End of requested URI') + + try: + intval = int(pc, base) + except ValueError: + return WSPathExtractResult(error='Invalid format: %s' % pc) + + if max_value is not None and intval > max_value: + return WSPathExtractResult( + error='value is too big: 0x%x > 0x%x' % (intval, max_value)) + + if intval < 0: + return WSPathExtractResult(error='value must be non-negative: %s' % pc) + + return WSPathExtractResult(value=intval) + + +class WSPathInt(WSPathComponent): + _name = None # must be set by sub class + _base = 10 + _max_value = None + + def __str__(self): + assert self._name is not None + return self._name + + def extract(self, pc, _data): + return extract_int(pc, self._base, self._max_value) + + +NETWORK_ID = '{network-id}' + + +class WSPathNetwork(WSPathComponent): + """ Match a network id string """ + def __str__(self): + return NETWORK_ID + + def extract(self, pc, _data): + return extract_string(pc) + + +_DPID_LEN = 16 +DPID_FMT = '%0' + str(_DPID_LEN) + 'x' +DPID = '{dpid}' + + +class WSPathSwitch(WSPathInt): + """ match a switch id string """ + _base = 16 + + def __init__(self, name): + super(WSPathSwitch, self).__init__() + self._name = name + + def extract(self, pc, data): + if pc is not None and len(pc) != _DPID_LEN: + return WSPathExtractResult(error='Invalid format: %s' % pc) + return super(WSPathSwitch, self).extract(pc, data) + + +PORT_NO = '{port-no}' + + +class WSPathPort(WSPathInt): + """ Match a {port-no} number """ + _name = PORT_NO -- 1.7.1.1 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Ryu-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ryu-devel
