Mercurial > prosody-modules
view mod_compression_unsafe/README.markdown @ 5951:d6a695abb33c
mod_ping_muc: Delay ping a configurable amount of time
If a server is restarting, checking immediately before it has a chance
to complete its restart and get ready would often fail, preventing the
possibility of transparent restarts as supported by Prosody's mod_muc.
Reconnecting immediately when a connection is closed for being idle, or
because the remote server is trying to reclaim some resources, is also
counter-productive as the connection may fail.
Also, if there is some Internet routing problem affecting s2s, it may
help to wait a bit before checking, in case the problem resolved itself
in the mean time.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 11 Aug 2024 16:10:24 +0200 |
parents | 4b7e6c01aa1c |
children |
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**NOTE:** XMPP compression has unresolved [security concerns](https://mail.jabber.org/pipermail/standards/2014-October/029215.html), and this module has been removed from Prosody and renamed. While the bandwidth usage of XMPP isn't that much, compressing the data sent to/from your server can give significant benefits to those on slow connections, such as dial-up or mobile networks. Prosody supports compression for client-to-server (if your client supports it) and server-to-server streams using the mod\_compression plugin. # Details mod\_compression implements [XEP-0138], and supports the zlib compression algorithm. ## Dependencies The XMPP protocol specifies that all clients and servers supporting compression must support the "zlib" compression method, and this is what Prosody uses. However you will need to install zlib support for Lua on your system. There are different ways of doing this depending on your system. If in doubt whether it is installed correctly, the command `lua -lzlib` in a console should open a Lua prompt with no errors. Debian/Ubuntu : `apt-get install lua-zlib` LuaRocks : `luarocks install lua-zlib` Source : <https://github.com/brimworks/lua-zlib> # Usage ``` lua modules_enabled = { -- Other modules "compression_unsafe"; -- Enable mod_compression_unsafe } ``` ## Configuration The compression level can be set using the `compression_level` option which can be a number from 1 to 9. Higher compression levels will use more resources but less bandwidth. ## Example ``` lua modules_enabled = { -- Other modules "compression_unsafe"; -- Enable mod_compression_unsafe } compression_level = 5 ```