64 lines
2.1 KiB
Lua
64 lines
2.1 KiB
Lua
--
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-- utm-filter.lua: filter out Google Analytics bullshit from URLs
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--
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-- Copyright (c) 2015, Přemysl Janouch <p.janouch@gmail.com>
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--
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-- Permission to use, copy, modify, and/or distribute this software for any
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-- purpose with or without fee is hereby granted, provided that the above
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-- copyright notice and this permission notice appear in all copies.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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--
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-- A list of useless URL parameters that don't affect page function
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local banned = {
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gclid = 1,
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utm_source = 1,
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utm_medium = 1,
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utm_term = 1,
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utm_content = 1,
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utm_campaign = 1,
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}
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-- Go through a parameter list and throw out any banned elements
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local do_args = function (args)
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local filtered = {}
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for part in args:gmatch ("[^&]+") do
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if not banned[part:match ("^[^=]*")] then
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table.insert (filtered, part)
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end
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end
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return table.concat (filtered, "&")
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end
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-- Filter parameters in both the query and the fragment part of an URL
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local do_single_url = function (url)
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return url:gsub ('^([^?#]*)%?([^#]*)', function (start, query)
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local clean = do_args (query)
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return #clean > 0 and start .. "?" .. clean or start
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end, 1):gsub ('^([^#]*)#(.*)', function (start, fragment)
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local clean = do_args (fragment)
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return #clean > 0 and start .. "#" .. clean or start
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end, 1)
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end
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local do_text = function (text)
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return text:gsub ('%f[%g]https?://%g+', do_single_url)
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end
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degesch.hook_irc (function (hook, server, line)
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local start, message = line:match ("^(.* :)(.*)$")
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return message and start .. do_text (message) or line
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end)
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degesch.hook_input (function (hook, buffer, input)
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return do_text (input)
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end)
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