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annotate mod_compression/README.markdown @ 2743:1fa9620220e3

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author tmolitor <thilo@eightysoft.de>
date Thu, 17 Aug 2017 21:34:56 +0200
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1 While the bandwidth usage of XMPP isn't that much, compressing the data
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2 sent 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 [XEP-0138], and supports the zlib compression
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10 algorithm.
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11
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12 ## Dependencies
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13
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14 The XMPP protocol specifies that all clients and servers supporting
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15 compression must support the "zlib" compression method, and this is what
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16 Prosody uses. However you will need to install zlib support for Lua on
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17 your system. There are different ways of doing this depending on your
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18 system. If in doubt whether it is installed correctly, the command
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19 `lua -lzlib` in a console should open a Lua prompt with no errors.
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20
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21 Debian/Ubuntu
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22 : `apt-get install lua-zlib`
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23
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24 LuaRocks
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25 : `luarocks install lua-zlib`
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26
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27 Source
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28 : <https://github.com/brimworks/lua-zlib>
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29
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30 # Usage
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31
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32 ``` lua
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33 modules_enabled = {
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34 -- Other modules
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35 "compression"; -- Enable mod_compression
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36 }
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37 ```
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38
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39 ## Configuration
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40
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41 The compression level can be set using the `compression_level` option
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42 which can be a number from 1 to 9. Higher compression levels will use
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43 more resources but less bandwidth.
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44
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45 ## Example
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46
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47 ``` lua
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48 modules_enabled = {
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49 -- Other modules
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50 "compression"; -- Enable mod_compression
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51 }
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52  
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53 compression_level = 5
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54 ```