---
labels:
- 'Stage-Beta'
summary: Provides a web interface to stored chatroom logs
...

Introduction
============

This module provides a built-in web interface to view chatroom logs
stored by [mod\_mam\_muc].

Installation
============

Same as any other module, be sure to include the HTML template
`http_muc_log.html` alongside `mod_http_muc_log.lua`.

Configuration
=============

For example:

``` lua
Component "conference.example.com" "muc"
modules_enabled = {
    "mam_muc";
    "http_muc_log";
}
storage = {
    muc_log = "sql"; -- for example
}
```

The web interface would then be reachable at the address:

    http://conference.example.com:5280/muc_log/

See [the page about Prosodys HTTP server][doc:http] for info about the
address.

## Styling

The default HTML template lives in `http_muc_log.html` in the same
directory as the module, but can be changed by setting
`http_muc_log_template` to point to a different file. The same template,
with different input is used for every view.

The module uses [util.interpolation][doc:developers:util:interpolation]
for rendering templates, with the pattern `"%b{}"` and HTML / XML
escaping enabled.

## Calendar optimization

The calendar view relies on an optional part of the Prosody archive
storage API that provides a list of every valid date. If this is
unavailable then the module queries for the first and the last messages
and assumes that every date between those is valid. This may lead to
many empty pages in case the logs are sparse.

This optimization can be turned off, to get a more accurate calendar
view, but it will likely be very slow.

``` {.lua}
http_muc_log_lazy_calendar = false
```

Compatibility
=============

Requires Prosody 0.10 or above and a storage backend with support for
stanza archives. See [mod\_storage\_muc\_log] for using legacy data from
[mod\_muc\_log].