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mod_compression: Import from Prosody, revision 0c69305ab525
author Kim Alvefur <zash@zash.se>
date Sun, 05 Feb 2017 14:40:51 +0100
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children b3097323278f
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1 While the bandwidth usage of XMPP isn't great, compressing the data sent
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2 to/from your server can give significant benefits to those on slow
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3 connections, such as dial-up or mobile networks. Prosody supports
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4 compression for client-to-server (if your client supports it) and
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5 server-to-server streams using the mod\_compression plugin.
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6
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7 # Details
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8
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9 mod\_compression implements
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10 [XEP-0138](http://xmpp.org/extensions/xep-0138.html "http://xmpp.org/extensions/xep-0138.html"){.urlextern},
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11 and supports the zlib compression algorithm.
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12
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13 ## Dependencies
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14
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15 The XMPP protocol specifies that all clients and servers supporting
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16 compression must support the "zlib" compression method, and this is what
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17 Prosody uses. However you will need to install zlib support for Lua on
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18 your system. There are different ways of doing this depending on your
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19 system. If in doubt whether it is installed correctly, the command \`lua
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20 -lzlib\` in a console should open a Lua prompt with no errors.
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21
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22 For more information on obtaining lua-zlib for your platform, see our
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23 [dependencies page](/doc/depends#lua-zlib "doc:depends"){.wikilink1}.
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24
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25 # Usage
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26
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27 ``` lua
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28 modules_enabled = {
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29 -- Other modules
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30 "compression"; -- Enable mod_compression
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31 }
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32 ```
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33
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34 Configuration
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35 -------------
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36
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37 Option Default Notes
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38 -------------------- --------- --------------------------------------------------------------------------------------------------------------------
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39 compression\_level 7 Can be a number from 1 to 9, where 9 is best. Higher compression levels will use more resources but less bandwidth
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40
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41 Example
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42 -------
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43
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44 ``` lua
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45 modules_enabled = {
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46 -- Other modules
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47 "compression"; -- Enable mod_compression
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48 }
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49  
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50 compression_level = 5
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51 ```