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89 lines
3.3 KiB
Markdown
89 lines
3.3 KiB
Markdown
<!-- @format -->
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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- [A bit opinionated titlefetching](#a-bit-opinionated-titlefetching)
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- [Preparation](#preparation)
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- [Actually enabling it](#actually-enabling-it)
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- [Excluding domains from titlefetching](#excluding-domains-from-titlefetching)
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- [Titlesnarfing ignored users](#titlesnarfing-ignored-users)
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- [Bonus: Fediverse](#bonus-fediverse)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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# A bit opinionated titlefetching
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## Preparation
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```
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load Web
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config plugins.web.snarfMultipleUrls True
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config plugins.web.snarferShowDomain False
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config plugins.web.snarferShowTargetDomain False
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config supybot.protocols.http.userAgents "Limnoria UrlPreviewBot"
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config supybot.protocols.http.peekSize 1048576
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```
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- enables the plugin (shipped with Limnoria)
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- enables titlefetching for all links on line, not just the first one
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- disables showing domain (small protection against multiple titlesfetcherrs
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entering a loop or simply not annoying users with clientside link previews
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(Matrix/Telegram bridges/relays included))
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- disables showing redirect target (see previous point)
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- sets user-agent to "Limnoria UrlPreviewBot" instead of
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['Mozilla/5.0 (compatible; utils.web python module)' from 2005](https://github.com/ProgVal/Limnoria/blame/2990fcd302afdc6a3b741594017c3959fd5da2fd/src/utils/web.py#L120)
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- I have heard that it's bad to pretend to be something you aren't and
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Twitter will only give you HTML `<title>`s if your user-agent contains
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`UrlPreviewBot`,
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[thanks Tulir's Synapse patch](https://mau.dev/maunium/synapse/-/commit/55d926999cffee893cb4951890a33985beaf70ba)
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- search for HTML titles from the first MEGABYTE of the webpage as modern web
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is horrible (looking at you [HS](https://hs.fi) &
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[YouTube](https://youtube.com))
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## Actually enabling it
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```
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config channel #CHAN plugins.web.titleSnarfer True
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```
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- enables titlefetching per-channel, on #CHAN to be accurate (avoiding
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unwanted channels in case of botloop)
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- `"channel #CHAN"` could also be replaced with `network NETWORKNAME` for
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every channel on network or `config` (or omitted entirely) for everywhere
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(channel takes priority over network which _probably_ takes priority over
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global)
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## Excluding domains from titlefetching
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```
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config supybot.plugins.Web.nonSnarfingRegexp m/(t.me|matrix.to|facebook.com|instagram.com|imgur.com)/
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```
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- regexp to block the listed domains, which are the first useless examples I
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have encountered recently. I just stole the regexp from
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[canonical Limnoria](https://github.com/ProgVal/Limnoria/wiki/Canonical-%23limnoria-doc)
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## Titlesnarfing ignored users
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While I personally don't like to do this, it's possible by
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```
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config channel #CHAN plugins.web.checkignored False
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```
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I may have the bot on multiple sides of relay or the user may be ignored due
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to abuse so this may result into spam.
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## Bonus: Fediverse
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If
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[the Fediverse plugin is configured with secure fetch](https://github.com/progval/Limnoria/tree/master/plugins/Fediverse),
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fetching Fediverse profiles/statuses/usernames can be enabled by:
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```
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channel #CHAN plugins.Fediverse.snarfers.profile true
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channel #CHAN plugins.Fediverse.snarfers.status true
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channel #CHAN plugins.Fediverse.snarfers.username true
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```
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