author | Matthew Wild <mwild1@gmail.com> |
Fri, 10 Mar 2017 10:19:05 +0000 | |
changeset 2611 | a7ef9b765891 |
parent 2490 | a5d4a78c7619 |
permissions | -rw-r--r-- |
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While the bandwidth usage of XMPP isn't that much, compressing the data |
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sent to/from your server can give significant benefits to those on slow |
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connections, such as dial-up or mobile networks. Prosody supports |
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compression for client-to-server (if your client supports it) and |
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server-to-server streams using the mod\_compression plugin. |
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# Details |
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mod\_compression implements [XEP-0138], and supports the zlib compression |
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algorithm. |
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## Dependencies |
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The XMPP protocol specifies that all clients and servers supporting |
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compression must support the "zlib" compression method, and this is what |
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Prosody uses. However you will need to install zlib support for Lua on |
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your system. There are different ways of doing this depending on your |
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system. If in doubt whether it is installed correctly, the command |
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`lua -lzlib` in a console should open a Lua prompt with no errors. |
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Debian/Ubuntu |
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: `apt-get install lua-zlib` |
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LuaRocks |
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: `luarocks install lua-zlib` |
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Source |
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: <https://github.com/brimworks/lua-zlib> |
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# Usage |
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``` lua |
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modules_enabled = { |
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-- Other modules |
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"compression"; -- Enable mod_compression |
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} |
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``` |
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## Configuration |
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The compression level can be set using the `compression_level` option |
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which can be a number from 1 to 9. Higher compression levels will use |
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more resources but less bandwidth. |
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## Example |
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``` lua |
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modules_enabled = { |
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-- Other modules |
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"compression"; -- Enable mod_compression |
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} |
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compression_level = 5 |
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``` |