File

util/xml.lua @ 11592:64cfa396bb84

net.server_epoll: Fix reporting of socket connect timeout If the underlying TCP connection times out before the write timeout kicks in, end up here with err="timeout", which the following code treats as a minor issue. Then, due to epoll apparently returning the EPOLLOUT (writable) event too, we go on and try to write to the socket (commonly stream headers). This fails because the socket is closed, which becomes the error returned up the stack to the rest of Prosody. This also trips the 'onconnect' signal, which has effects on various things, such as the net.connect state machine. Probably undesirable effects. With this, we instead return "connection timeout", like server_event, and destroy the connection handle properly. And then nothing else happens because the connection has been destroyed.
author Kim Alvefur <zash@zash.se>
date Mon, 07 Jun 2021 17:37:14 +0200 (2021-06-07)
parent 11127:1d9cd1abc660
child 12121:2162e86029b6
line wrap: on
line source

local st = require "util.stanza";
local lxp = require "lxp";
local t_insert = table.insert;
local t_remove = table.remove;

local _ENV = nil;
-- luacheck: std none

local parse_xml = (function()
	local ns_prefixes = {
		["http://www.w3.org/XML/1998/namespace"] = "xml";
	};
	local ns_separator = "\1";
	local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$";
	return function(xml)
		--luacheck: ignore 212/self
		local handler = {};
		local stanza = st.stanza("root");
		local namespaces = {};
		local prefixes = {};
		function handler:StartNamespaceDecl(prefix, url)
			if prefix ~= nil then
				t_insert(namespaces, url);
				t_insert(prefixes, prefix);
			end
		end
		function handler:EndNamespaceDecl(prefix)
			if prefix ~= nil then
				-- we depend on each StartNamespaceDecl having a paired EndNamespaceDecl
				t_remove(namespaces);
				t_remove(prefixes);
			end
		end
		function handler:StartElement(tagname, attr)
			local curr_ns,name = tagname:match(ns_pattern);
			if name == "" then
				curr_ns, name = "", curr_ns;
			end
			if curr_ns ~= "" then
				attr.xmlns = curr_ns;
			end
			for i=1,#attr do
				local k = attr[i];
				attr[i] = nil;
				local ns, nm = k:match(ns_pattern);
				if nm ~= "" then
					ns = ns_prefixes[ns];
					if ns then
						attr[ns..":"..nm] = attr[k];
						attr[k] = nil;
					end
				end
			end
			local n = {}
			for i=1,#namespaces do
				n[prefixes[i]] = namespaces[i];
			end
			stanza:tag(name, attr, n);
		end
		function handler:CharacterData(data)
			stanza:text(data);
		end
		function handler:EndElement()
			stanza:up();
		end
		local parser = lxp.new(handler, "\1");
		local ok, err, line, col = parser:parse(xml);
		if ok then ok, err, line, col = parser:parse(); end
		--parser:close();
		if ok then
			return stanza.tags[1];
		else
			return ok, ("%s (line %d, col %d))"):format(err, line, col);
		end
	end;
end)();

return {
	parse = parse_xml;
};