Mercurial > prosody-modules
annotate mod_compression/README.markdown @ 2631:2bfa7d476092
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author | JC Brand <jc@opkode.com> |
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date | Tue, 21 Mar 2017 09:43:03 +0000 |
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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 ``` |