This module adds Open Graph Protocol metadata to URLs sent inside a MUC.
With mod_ogp enabled, when a user sends a URL in a MUC (where the message has its id equal to its origin-id), the module calls the URL and parses the result for <meta> html tags that have any og:... properties. If it finds any, it sends a XEP-0422 fastening applied to the original message that looks like:
<message id="example" from="chatroom@muc.example.org" to="user@chat.example.org/resource">
<apply-to xmlns="urn:xmpp:fasten:0" id="origin-id-X">
<meta xmlns="http://www.w3.org/1999/xhtml" property="og:title" content="The Rock"/>
<meta xmlns="http://www.w3.org/1999/xhtml" property="og:url" content="https://www.imdb.com/title/tt0117500/"/>
<meta xmlns="http://www.w3.org/1999/xhtml" property="og:image" content="https://ia.media-imdb.com/images/rock.jpg"/>
</apply-to>
</message>The module is intentionally simple in the sense that it is basically a transport for https://ogp.me/
You can present an allowlist or denylist of domains for which OGP metadata will be fetched via the ogp_domain_allowlist and ogp_domain_denylist settings repectively.
For example:
Component "muc.example.org" "muc"
modules_enabled = { "ogp" }
ogp_domain_allowlist = { "prosody.im" }