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30 lines
1 KiB
Text
30 lines
1 KiB
Text
Creating custom scripts
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-----------------------
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Users can create custom scripts to interact with ntopng. Scripts must be placed
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under the `scripts/lua` directory.
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This is an example script located at `scripts/lua/my_script.lua`
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```
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dirs = ntop.getDirs()
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package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
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require "lua_utils"
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local a = tonumber(_GET["p_a"])
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local b = tonumber(_GET["p_a"])
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if ((a ~= nil) and (b ~= nil)) then
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print(a .. " + " .. b .. " = " .. a+b)
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end
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```
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It can be invoked visiting the URL `http://127.0.0.1:3000/lua/my_script.lua?p_a=2&p_b=3`.
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Scripts parameters
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------------------
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User defined parameters must begin with *p_* prefix as shown in the example.
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The prefix disables custom parameter validation, which is performed by ntopng by default on internal
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parameters for security reasons. It is up to the script writer to correctly validate
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custom parameters in order to avoid XSS attacks.
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See [scripts/lua/modules/http_lint.lua](../scripts/lua/modules/http_lint.lua) for the list of ntopng built-in parameters.
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