Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_comp_ap_gateway/regex.py @ 4090:e9d800b105c1
cli (event): minor typo
author | Goffi <goffi@goffi.org> |
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date | Thu, 08 Jun 2023 21:28:40 +0200 |
parents | 4b842c1fb686 |
children | 0d7bb4df2343 |
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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") |