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92 lines
3.4 KiB
92 lines
3.4 KiB
# Copyright (c) 2011 Duncan Fordyce, Jimmy Cao |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# The above copyright notice and this permission notice shall be included in |
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# all copies or substantial portions of the Software. |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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# THE SOFTWARE. |
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import logging |
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from oyoyo.ircevents import generated_events, protocol_events,\ |
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all_events, numeric_events |
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# avoiding regex |
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def parse_raw_irc_command(element): |
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""" |
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This function parses a raw irc command and returns a tuple |
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of (prefix, command, args). |
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The following is a psuedo BNF of the input text: |
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<message> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf> |
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<prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <host> ] |
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<command> ::= <letter> { <letter> } | <number> <number> <number> |
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<SPACE> ::= ' ' { ' ' } |
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<params> ::= <SPACE> [ ':' <trailing> | <middle> <params> ] |
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<middle> ::= <Any *non-empty* sequence of octets not including SPACE |
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or NUL or CR or LF, the first of which may not be ':'> |
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<trailing> ::= <Any, possibly *empty*, sequence of octets not including |
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NUL or CR or LF> |
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<crlf> ::= CR LF |
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""" |
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parts = element.strip().split(bytes(" ", "utf_8")) |
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if parts[0].startswith(bytes(':', 'utf_8')): |
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prefix = parts[0][1:] |
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command = parts[1] |
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args = parts[2:] |
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else: |
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prefix = None |
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command = parts[0] |
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args = parts[1:] |
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if command.isdigit(): |
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try: |
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command = numeric_events[command] |
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except KeyError: |
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logging.debug('unknown numeric event {0}'.format(command)) |
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command = command.lower() |
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if isinstance(command, bytes): command = command.decode("utf_8") |
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if args[0].startswith(bytes(':', 'utf_8')): |
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args = [bytes(" ", "utf_8").join(args)[1:]] |
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else: |
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for idx, arg in enumerate(args): |
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if arg.startswith(bytes(':', 'utf_8')): |
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args = args[:idx] + [bytes(" ", 'utf_8').join(args[idx:])[1:]] |
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break |
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return (prefix, command, args) |
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def parse_nick(name): |
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""" parse a nickname and return a tuple of (nick, mode, user, host) |
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<nick> [ '!' [<mode> = ] <user> ] [ '@' <host> ] |
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""" |
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try: |
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nick, rest = name.split('!') |
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except ValueError: |
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return (name, None, None, None) |
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try: |
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mode, rest = rest.split('=') |
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except ValueError: |
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mode, rest = None, rest |
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try: |
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user, host = rest.split('@') |
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except ValueError: |
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return (nick, mode, rest, None) |
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return (nick, mode, user, host) |
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