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titlefetching: separate enabling, fleshen it & cut lines
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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 channel #CHAN plugins.web.titleSnarfer True
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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 titlesnarfers entering loop)
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* disables showing domain (small protection against multiple titlesnarfers
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entering loop)
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* disables showing redirect target -||-
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* enables titlefetching per-channel (avoids unwanted channels in case of botloop)
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* could also be `config config` or `config network NETWORKNAME` to do globally or per-network, but risk of accidental botloop
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* sets user-agent to "Limnoria UrlPreviewBot" instead of ['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 Twitter will only give you HTMl `<title>`s if your user-agent contains `UrlPreviewBot`
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* search for html titles from the first MEGABYTE of the webpage as modern web is horrible (looking at you hs.fi & youtube.com)
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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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* search for html titles from the first MEGABYTE of the webpage as modern
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web is horrible (looking at you hs.fi & 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
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(avoiding 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
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everywhere (channel takes priority over network which *probably takes*
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priority over global)
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