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annotate mod_compression/README.markdown @ 2491:5fbca7de2088

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mod_smacks: Send out more ack requests where needed Under some circumstances it was possible that more than "max_unacked_stanzas" where left in the outgoing stanza queue without forcing an ack. This could happen, when more stanzas entered the queue while the last ack request was still unanswered. Now the test "#queue > max_unacked_stanzas" is done upon receiving an ack as well as when sending out stanzas, which fixes this bug.
author tmolitor <thilo@eightysoft.de>
date Sun, 12 Feb 2017 19:27:50 +0100
parents a5d4a78c7619
children
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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 ```