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annotate sat/plugins/plugin_comp_ap_gateway/regex.py @ 3913:944f51f9c2b4

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core (xmpp): make `send` a blocking method, fix `sendMessageData` calls: original `send` method is blocking, and it is used as such by Wokkel and thus can't be changed to an async method easily. However, an Async method is necessary to have an async trigger at the very end of the send workflow for end-to-end encryption. To workaround that, `send` is an async method which call `a_send`, an async method which actually does the sending. This way legacy method can still call `send` while `a_send` can be await otherwise. Fix calls to `sendMessageData`: the method now being an `async` one, `ensureDeferred` had to be used in some calls.
author Goffi <goffi@goffi.org>
date Sat, 24 Sep 2022 16:31:39 +0200
parents 381340b9a9ee
children
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1 #!/usr/bin/env python3
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2
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3 # Libervia ActivityPub Gateway
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4 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 """Various Regular Expression for AP gateway"""
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20
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21 import re
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22
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23 ## "Signature" header parsing
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24
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25 # those expression have been generated with abnf-to-regex
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26 # (https://github.com/aas-core-works/abnf-to-regexp)
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27
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28 # the base RFC 7320 ABNF rules come from https://github.com/EricGT/ABNF
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29
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30 # here is the ABNF file used:
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31 # ---
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32 # BWS = OWS
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33 # OWS = *( SP / HTAB )
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34 # tchar = "!" / "#" / "$" / "%" / "&" / "`" / "*" / "+" / "-" / "." / "^" / "_" / "\'" / "|" / "~" / DIGIT / ALPHA
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35 # token = 1*tchar
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36 # sig-param = token BWS "=" BWS ( token / quoted-string )
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37 # quoted-string = DQUOTE *( qdtext / quoted-pair ) DQUOTE
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38 # qdtext = HTAB / SP / "!" / %x23-5B ; '#'-'['
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39 # / %x5D-7E ; ']'-'~'
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40 # / obs-text
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41 # quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text )
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42 # obs-text = %x80-FF
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43 # ---
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44
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45 ows = '[ \t]*'
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46 bws = f'{ows}'
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47 obs_text = '[\\x80-\\xff]'
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48 qdtext = f'([\t !#-\\[\\]-~]|{obs_text})'
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49 quoted_pair = f'\\\\([\t !-~]|{obs_text})'
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50 quoted_string = f'"({qdtext}|{quoted_pair})*"'
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51 tchar = "([!#$%&`*+\\-.^_]|\\\\'|[|~0-9a-zA-Z])"
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52 token = f'({tchar})+'
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53 RE_SIG_PARAM = re.compile(
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54 f'(?P<key>{token}{bws})={bws}'
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55 f'((?P<uq_value>{token})|(?P<quoted_value>{quoted_string}))'
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56 )
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57
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58
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59 ## Account/Mention
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60
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61 # FIXME: naive regex, should be approved following webfinger, but popular implementations
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62 # such as Mastodon use a very restricted subset
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63 RE_ACCOUNT = re.compile(r"[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-]+")
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64 RE_MENTION = re.compile(rf"(?<!\w)@{RE_ACCOUNT.pattern}\b")