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Authored by Vgutierrez on Jun 18 2020, 11:28 AM.

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	F31870386: raw.txt
	Jun 18 2020, 11:28 AM

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	function read_config()
	local configfile = ts.get_config_dir() .. "/lua/http-redirect.lua.conf"

	ts.debug("Reading " .. configfile)

	dofile(configfile)
	assert(lua_hostname, "lua_hostname not set by " .. configfile)

	ts.debug("read_config() returning " .. lua_hostname)

	return lua_hostname
	end

	local HOSTNAME = read_config()
	local ALLOWED_PLAIN_METHODS = {GET=true, HEAD=true}

	function handle_plain_request()
	local client_ip, client_port, client_family = ts.client_request.client_addr.get_addr()
	local http_method = ts.client_request.get_method()
	local response_status = "403 Insecure Request Forbidden - use HTTPS - https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2016-May/000110.html"
	local headers = 'Server-Timing: cache;desc="int-front"\r\n' ..
	'X-Cache: ' .. HOSTNAME .. ' int\r\n' ..
	'X-Cache-Status: int-front\r\n' ..
	'X-Client-Ip: ' .. client_ip .. '\r\n'

	if ALLOWED_PLAIN_METHODS[http_method] ~= nil then
	local url = ts.client_request.get_url()
	url = string.gsub(url, "^http", "https", 1)
	response_status = "301 TLS Redirect"
	headers = headers .. 'Location: ' .. url .. '\r\n'
	end

	ts.say("HTTP/1.1 " .. response_status .. "\r\n" .. headers)
	end

	function do_remap()
	local server_port = ts.client_request.client_addr.get_incoming_port()
	if server_port == 80 then
	ts.http.server_intercept(handle_plain_request)
	return TS_LUA_REMAP_NO_REMAP_STOP
	end
	return TS_LUA_REMAP_NO_REMAP
	end

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