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253 lines
9.2 KiB
Python
253 lines
9.2 KiB
Python
###
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# Copyright (c) 2003-2005, Jeremiah Fincher
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# Copyright (c) 2008-2009, James McCoy
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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import re
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import sys
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import types
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import codecs
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import base64
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import binascii
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import supybot.utils as utils
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from supybot.commands import *
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import supybot.commands as commands
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import supybot.plugins as plugins
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import supybot.commands as commands
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import supybot.ircutils as ircutils
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import supybot.callbacks as callbacks
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from supybot.i18n import PluginInternationalization, internationalizeDocstring
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_ = PluginInternationalization('String')
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import multiprocessing
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class String(callbacks.Plugin):
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"""Provides useful commands for manipulating characters and strings."""
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@internationalizeDocstring
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def ord(self, irc, msg, args, letter):
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"""<letter>
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Returns the 8-bit value of <letter>.
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"""
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irc.reply(str(ord(letter)))
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ord = wrap(ord, ['letter'])
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@internationalizeDocstring
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def chr(self, irc, msg, args, i):
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"""<number>
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Returns the character associated with the 8-bit value <number>
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"""
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try:
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irc.reply(chr(i))
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except ValueError:
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irc.error(_('That number doesn\'t map to an 8-bit character.'))
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chr = wrap(chr, ['int'])
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@internationalizeDocstring
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def encode(self, irc, msg, args, encoding, text):
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"""<encoding> <text>
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Returns an encoded form of the given text; the valid encodings are
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available in the documentation of the Python codecs module:
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<http://docs.python.org/library/codecs.html#standard-encodings>.
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"""
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# Binary codecs are prefixed with _codec in Python 3
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if encoding in 'base64 bz2 hex quopri uu zlib':
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encoding += '_codec'
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if encoding.endswith('_codec'):
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text = text.encode()
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# Do the encoding
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try:
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encoder = codecs.getencoder(encoding)
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except LookupError:
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irc.errorInvalid(_('encoding'), encoding)
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text = encoder(text)[0]
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# If this is a binary codec, re-encode it with base64
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if encoding.endswith('_codec') and encoding != 'base64_codec':
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text = codecs.getencoder('base64_codec')(text)[0].decode()
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# Change result into a string
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if sys.version_info[0] < 3 and isinstance(text, unicode):
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text = text.encode('utf-8')
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elif sys.version_info[0] >= 3 and isinstance(text, bytes):
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text = text.decode()
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# Reply
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irc.reply(text.rstrip('\n'))
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encode = wrap(encode, ['something', 'text'])
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@internationalizeDocstring
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def decode(self, irc, msg, args, encoding, text):
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"""<encoding> <text>
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Returns an un-encoded form of the given text; the valid encodings are
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available in the documentation of the Python codecs module:
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<http://docs.python.org/library/codecs.html#standard-encodings>.
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"""
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# Binary codecs are prefixed with _codec in Python 3
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if encoding in 'base64 bz2 hex quopri uu zlib':
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encoding += '_codec'
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# If this is a binary codec, pre-decode it with base64
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if encoding.endswith('_codec') and encoding != 'base64_codec':
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text = codecs.getdecoder('base64_codec')(text.encode())[0]
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# Do the decoding
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try:
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decoder = codecs.getdecoder(encoding)
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except LookupError:
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irc.errorInvalid(_('encoding'), encoding)
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if sys.version_info[0] >= 3 and not isinstance(text, bytes):
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text = text.encode()
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try:
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text = decoder(text)[0]
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except binascii.Error:
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irc.errorInvalid(_('base64 string'),
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s=_('Base64 strings must be a multiple of 4 in '
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'length, padded with \'=\' if necessary.'))
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return
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# Change result into a string
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if sys.version_info[0] < 3 and isinstance(text, unicode):
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text = text.encode('utf-8')
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elif sys.version_info[0] >= 3 and isinstance(text, bytes):
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text = text.decode()
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# Reply
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irc.reply(text)
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decode = wrap(decode, ['something', 'text'])
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@internationalizeDocstring
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def levenshtein(self, irc, msg, args, s1, s2):
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"""<string1> <string2>
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Returns the levenshtein distance (also known as the "edit distance"
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between <string1> and <string2>)
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"""
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max = self.registryValue('levenshtein.max')
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if len(s1) > max or len(s2) > max:
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irc.error(_('Levenshtein distance is a complicated algorithm, try '
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'it with some smaller inputs.'))
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else:
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irc.reply(str(utils.str.distance(s1, s2)))
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levenshtein = thread(wrap(levenshtein, ['something', 'text']))
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@internationalizeDocstring
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def soundex(self, irc, msg, args, text, length):
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"""<string> [<length>]
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Returns the Soundex hash to a given length. The length defaults to
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4, since that's the standard length for a soundex hash. For unlimited
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length, use 0. Maximum length 1024.
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"""
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if length > 1024:
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irc.error("Maximum allowed length is 1024.")
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return
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irc.reply(utils.str.soundex(text, length))
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soundex = wrap(soundex, ['somethingWithoutSpaces', additional('int', 4)])
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@internationalizeDocstring
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def len(self, irc, msg, args, text):
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"""<text>
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Returns the length of <text>.
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"""
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irc.reply(str(len(text)))
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len = wrap(len, ['text'])
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@internationalizeDocstring
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def re(self, irc, msg, args, ff, text):
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"""<regexp> <text>
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If <regexp> is of the form m/regexp/flags, returns the portion of
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<text> that matches the regexp. If <regexp> is of the form
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s/regexp/replacement/flags, returns the result of applying such a
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regexp to <text>.
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"""
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if isinstance(ff, (types.FunctionType, types.MethodType)):
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f = ff
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else:
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f = lambda s: ff.search(s) and ff.search(s).group(0) or ''
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if f('') and len(f(' ')) > len(f(''))+1: # Matches the empty string.
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s = _('You probably don\'t want to match the empty string.')
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irc.error(s)
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else:
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t = self.registryValue('re.timeout')
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try:
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v = process(f, text, timeout=t, pn=self.name(), cn='re')
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irc.reply(v)
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except commands.ProcessTimeoutError as e:
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irc.error("ProcessTimeoutError: %s" % (e,))
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except re.error as e:
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irc.error(e.args[0])
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re = thread(wrap(re, [first('regexpMatcher', 'regexpReplacer'),
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'text']))
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def xor(self, irc, msg, args, password, text):
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"""<password> <text>
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Returns <text> XOR-encrypted with <password>. See
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http://www.yoe.org/developer/xor.html for information about XOR
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encryption.
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"""
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chars = utils.iter.cycle(password)
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ret = [chr(ord(c) ^ ord(next(chars))) for c in text]
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irc.reply(''.join(ret))
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xor = wrap(xor, ['something', 'text'])
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@internationalizeDocstring
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def md5(self, irc, msg, args, text):
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"""<text>
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Returns the md5 hash of a given string. Read
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http://www.rsasecurity.com/rsalabs/faq/3-6-6.html for more information
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about md5.
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"""
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irc.reply(utils.crypt.md5(text.encode('utf8')).hexdigest())
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md5 = wrap(md5, ['text'])
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@internationalizeDocstring
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def sha(self, irc, msg, args, text):
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"""<text>
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Returns the SHA hash of a given string. Read
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http://www.secure-hash-algorithm-md5-sha-1.co.uk/ for more information
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about SHA.
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"""
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irc.reply(utils.crypt.sha(text.encode('utf8')).hexdigest())
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sha = wrap(sha, ['text'])
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Class = String
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# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
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