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comparison sat/plugins/plugin_comp_ap_gateway/regex.py @ 3833:381340b9a9ee

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component AP gateway: convert XMPP mentions to AP: When a XEP-0372 mention is received, the linked pubsub item is looked after in cache, and if found, it is send to mentioned entity with `mention` tag added. However, this doesn't work in some cases (see incoming doc for details). To work around that, `@user@server.tld` type mention are also scanned in body, and mentions are added when found (this can be disabled with `auto_mentions` setting). Mention are only scanned in "public" messages, i.e. for pubsub items, and not direct messages. rel 369
author Goffi <goffi@goffi.org>
date Sun, 10 Jul 2022 16:15:06 +0200
parents eddab3798aca
children
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3832:201a22bfbb74 3833:381340b9a9ee
14 # GNU Affero General Public License for more details. 14 # GNU Affero General Public License for more details.
15 15
16 # You should have received a copy of the GNU Affero General Public License 16 # You should have received a copy of the GNU Affero General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>. 17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 18
19 """Regular Expression to parse "Signature" header""" 19 """Various Regular Expression for AP gateway"""
20
21 import re
22
23 ## "Signature" header parsing
20 24
21 # those expression have been generated with abnf-to-regex 25 # those expression have been generated with abnf-to-regex
22 # (https://github.com/aas-core-works/abnf-to-regexp) 26 # (https://github.com/aas-core-works/abnf-to-regexp)
23 27
24 # the base RFC 7320 ABNF rules come from https://github.com/EricGT/ABNF 28 # the base RFC 7320 ABNF rules come from https://github.com/EricGT/ABNF
36 # / obs-text 40 # / obs-text
37 # quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text ) 41 # quoted-pair = "\" ( HTAB / SP / VCHAR / obs-text )
38 # obs-text = %x80-FF 42 # obs-text = %x80-FF
39 # --- 43 # ---
40 44
41 import re
42
43 ows = '[ \t]*' 45 ows = '[ \t]*'
44 bws = f'{ows}' 46 bws = f'{ows}'
45 obs_text = '[\\x80-\\xff]' 47 obs_text = '[\\x80-\\xff]'
46 qdtext = f'([\t !#-\\[\\]-~]|{obs_text})' 48 qdtext = f'([\t !#-\\[\\]-~]|{obs_text})'
47 quoted_pair = f'\\\\([\t !-~]|{obs_text})' 49 quoted_pair = f'\\\\([\t !-~]|{obs_text})'
50 token = f'({tchar})+' 52 token = f'({tchar})+'
51 RE_SIG_PARAM = re.compile( 53 RE_SIG_PARAM = re.compile(
52 f'(?P<key>{token}{bws})={bws}' 54 f'(?P<key>{token}{bws})={bws}'
53 f'((?P<uq_value>{token})|(?P<quoted_value>{quoted_string}))' 55 f'((?P<uq_value>{token})|(?P<quoted_value>{quoted_string}))'
54 ) 56 )
57
58
59 ## Account/Mention
60
61 # FIXME: naive regex, should be approved following webfinger, but popular implementations
62 # such as Mastodon use a very restricted subset
63 RE_ACCOUNT = re.compile(r"[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-]+")
64 RE_MENTION = re.compile(rf"(?<!\w)@{RE_ACCOUNT.pattern}\b")