view mod_flash_policy/mod_flash_policy.lua @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents 7dbde05b48a9
children
line wrap: on
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local filters = require "util.filters";
local config = {}
config.file = module:get_option_string("crossdomain_file", "");
config.string = module:get_option_string("crossdomain_string", [[<?xml version="1.0"?><!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd"><cross-domain-policy><site-control permitted-cross-domain-policies="master-only"/><allow-access-from domain="*" /></cross-domain-policy>]]);
local string = ''
if not config.file ~= '' then
	local f = assert(io.open(config.file));
	string = f:read("*all");
else
	string = config.string
end

module:log("debug", "crossdomain string: "..string);

module:set_global();

function filter_policy(data, session)
	-- Since we only want to check the first block of data, remove the filter
	filters.remove_filter(session, "bytes/in", filter_policy);
	if data == "<policy-file-request/>\0" then
		session.send(string.."\0");
		return nil; -- Drop data to prevent it reaching the XMPP parser
	else
		return data; -- Pass data through, it wasn't a policy request
	end

end

function filter_session(session)
	if session.type == "c2s_unauthed" then
		filters.add_filter(session, "bytes/in", filter_policy, -1);
	end
end

function module.load()
	filters.add_filter_hook(filter_session);
end

function module.unload()
	filters.remove_filter_hook(filter_session);
end