view mod_muc_media_metadata/README.markdown @ 5354:39d59d857bfb

mod_http_oauth2: Use new mod_cron API for periodic cleanup Less frequent but this isn't that important after all since, as the comment states, expired codes are not usable anyway. They're also not that large so memory usage probably doesn't matter.
author Kim Alvefur <zash@zash.se>
date Sat, 22 Apr 2023 11:59:52 +0200
parents 0e1e775bdea0
children
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---
labels:
- 'Stage-Alpha'
summary: 'Experimental module to add metadata to media in MUCs'
...

# Introduction

This module adds additional metadata to media shared in a MUC. This can help clients
make decisions and provide better UI and enhanced privacy, by knowing things like file
size without needing to make external network requests.

::: {.alert .alert-danger}
**NOTE:** This is an experimental module. It is not supported by any
clients, and therefore is mainly of interest to client developers who
wish to explore the idea.
:::

# Configuring

## Enabling

``` {.lua}
Component "rooms.example.net" "muc"
modules_enabled = {
    "muc_media_metadata";
}
```

## Settings

There are no configuration options for this module.

# Developers

## Example stanzas

A normal message in a chatroom containing an image:

```
<message from="test@rooms.example.com/matthew" id="9f45a784-5e5b-4db5-a9b3-8ea1d7c1162d" type="groupchat">
  <body>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</body>
  <x xmlns="jabber:x:oob">
    <url>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</url>
  </x>
</message>
```

The same stanza with this module loaded now contains additional metadata added by the server:

```
<message from="test@rooms.example.com/matthew" id="9f45a784-5e5b-4db5-a9b3-8ea1d7c1162d" type="groupchat">
  <body>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</body>
  <x xmlns="jabber:x:oob">
    <url>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</url>
    <metadata xmlns="xmpp:prosody.im/protocol/media-metadata#0">
      <bytes>15690</bytes>
      <type>image/png</type>
      <blurhash>LEHV6nWB2yk8pyo0adR*.7kCMdnj</blurhash>
    </metadata>
  </x>
</message>
```