Cavemanon/Nginx-Lua-Anti-DDoS
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Update anti_ddos_challenge.lua

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Make charset customisable value for those who wish to translate this script into their own native languages.

https://github.com/C0nw0nk/Nginx-Lua-Anti-DDoS/issues/8
This commit is contained in:
C0nw0nk
2019-11-15 18:09:55 +00:00
committed by GitHub
parent 1584f1ff34
commit ac52cb4dff
1 changed files with 19 additions and 14 deletions
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33
lua/anti_ddos_challenge.lua
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@ -203,6 +203,11 @@ TODO:
Google ReCaptcha
]]
--[[
Charset output of HTML page and scripts
]]
local default_charset = "utf-8"
--[[
End Configuration
@ -293,13 +298,13 @@ local function encrypt_javascript(string1, type, defer_async, num_encrypt, encry
if type == 1 or type == nil then --No encryption
if defer_async == "0" or defer_async == nil then --Browser default loading / execution order
output = "<script type=\"text/javascript\">" .. string1 .. "</script>"
output = "<script type=\"text/javascript\" charset=\"" .. default_charset .. "\">" .. string1 .. "</script>"
end
if defer_async == "1" then --Defer
output = "<script type=\"text/javascript\" defer=\"defer\">" .. string1 .. "</script>"
output = "<script type=\"text/javascript\" defer=\"defer\" charset=\"" .. default_charset .. "\">" .. string1 .. "</script>"
end
if defer_async == "2" then --Async
output = "<script type=\"text/javascript\" async=\"async\">" .. string1 .. "</script>"
output = "<script type=\"text/javascript\" async=\"async\" charset=\"" .. default_charset .. "\">" .. string1 .. "</script>"
end
end
@ -315,13 +320,13 @@ local function encrypt_javascript(string1, type, defer_async, num_encrypt, encry
end
if defer_async == "0" or defer_async == nil then --Browser default loading / execution order
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\"></script>"
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\" charset=\"" .. charset .. "\"></script>"
end
if defer_async == "1" then --Defer
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\" defer=\"defer\"></script>"
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\" defer=\"defer\" charset=\"" .. charset .. "\"></script>"
end
if defer_async == "2" then --Async
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\" async=\"async\"></script>"
output = "<script type=\"text/javascript\" src=\"data:text/javascript;base64," .. ngx.encode_base64(string1) .. "\" async=\"async\" charset=\"" .. charset .. "\"></script>"
end
end
@ -358,7 +363,7 @@ local function encrypt_javascript(string1, type, defer_async, num_encrypt, encry
end
--https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent
output = "<script type=\"text/javascript\">eval(decodeURIComponent('" .. hexadecimal_x .. "'))</script>"
output = "<script type=\"text/javascript\" charset=\"" .. default_charset .. "\">eval(decodeURIComponent('" .. hexadecimal_x .. "'))</script>"
end
if type == 4 then --Base64 javascript decode
@ -371,13 +376,13 @@ local function encrypt_javascript(string1, type, defer_async, num_encrypt, encry
end
if defer_async == "0" or defer_async == nil then --Browser default loading / execution order
output = "<script type=\"text/javascript\">" .. base64_javascript .. "</script>"
output = "<script type=\"text/javascript\" charset=\"" .. default_charset .. "\">" .. base64_javascript .. "</script>"
end
if defer_async == "1" then --Defer
output = "<script type=\"text/javascript\" defer=\"defer\">" .. base64_javascript .. "</script>"
output = "<script type=\"text/javascript\" defer=\"defer\" charset=\"" .. default_charset .. "\">" .. base64_javascript .. "</script>"
end
if defer_async == "2" then --Defer
output = "<script type=\"text/javascript\" async=\"async\">" .. base64_javascript .. "</script>"
output = "<script type=\"text/javascript\" async=\"async\" charset=\"" .. default_charset .. "\">" .. base64_javascript .. "</script>"
end
end
@ -613,7 +618,7 @@ local javascript_anti_ddos = [[
encrypt/obfuscate the javascript output
]]
if encrypt_javascript_output == 1 then --No encryption/Obfuscation of Javascript so show Javascript in plain text
javascript_anti_ddos = [[<script type="text/javascript">
javascript_anti_ddos = [[<script type="text/javascript" charset="]] .. default_charset .. [[">
]] .. javascript_anti_ddos .. [[
</script>]]
else --some form of obfuscation has been specified so obfuscate the javascript output
@ -685,8 +690,8 @@ local anti_ddos_html_output = [[
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta charset="]] .. default_charset .. [[" />
<meta http-equiv="Content-Type" content="text/html; charset=]] .. default_charset .. [[" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
<meta name="robots" content="noindex, nofollow" />
@ -742,7 +747,7 @@ ngx.header["Cache-Control"] = "public, max-age=0 no-store, no-cache, must-revali
ngx.header["Pragma"] = "no-cache"
ngx.header["Expires"] = "0"
ngx.header["X-Anti-DDoS"] = "Conor McKnight | facebook.com/C0nw0nk"
ngx.header.content_type = "text/html; charset=UTF-8"
ngx.header.content_type = "text/html; charset=" .. default_charset
ngx.status = expected_header_status
ngx.say(anti_ddos_html_output)
ngx.exit(ngx.HTTP_OK)