# mod_ogp

This module adds [Open Graph Protocol](https://ogp.me) 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](https://xmpp.org/extensions/xep-0422.html) applied to the original message that looks like:

<message id="example" from="chatroom@muc.example.org" to="chatroom@muc.example.org">

<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/

Configuration

-------------

You can present a whitelist of domains for which OGP metadata will be fetched

via the `ogp_domain_whitelist` setting.

For example:

    Component "muc.example.org" "muc"

      modules_enabled = { "ogp" }

      ogp_domain_whitelist = { "prosody.im" }