prosody
148075532021
spec/util_datamapper_spec.lua

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spec/util_datamapper_spec.lua @ 11665:148075532021

net.server_epoll: Prevent stack overflow of opportunistic writes net.http.files serving a big enough file on a fast enough connection with opportunistic_writes enabled could trigger a stack overflow through repeatedly serving more data that immediately gets sent, draining the buffer and triggering more data to be sent. This also blocked the server on a single task until completion or an error. This change prevents nested opportunistic writes, which should prevent the stack overflow, at the cost of reduced download speed, but this is unlikely to be noticeable outside of Gbit networks. Speed at the cost of blocking other processing is not worth it, especially with the risk of stack overflow.
author Kim Alvefur <zash@zash.se>
date Sun, 11 Jul 2021 09:39:21 +0200
parent 11494:284c822d4c3d
child 12133:11060c8919b6
line wrap: on
line source

local st
local xml
local map

setup(function()
	st = require "util.stanza";
	xml = require "util.xml";
	map = require "util.datamapper";
end);

describe("util.datampper", function()

	local s, x, d
	local disco, disco_info, disco_schema
	setup(function()

		-- a convenience function for simple attributes, there's a few of them
		local function attr() return {type = "string"; xml = {attribute = true}} end
		s = {
			type = "object";
			xml = {name = "message"; namespace = "jabber:client"};
			properties = {
				to = attr();
				from = attr();
				type = attr();
				id = attr();
				body = "string";
				lang = {type = "string"; xml = {attribute = true; prefix = "xml"}};
				delay = {
					type = "object";
					xml = {namespace = "urn:xmpp:delay"; name = "delay"};
					properties = {stamp = attr(); from = attr(); reason = {type = "string"; xml = {text = true}}};
				};
				state = {
					type = "string";
					enum = {
						"active",
						"inactive",
						"gone",
						"composing",
						"paused",
					};
					xml = {x_name_is_value = true; namespace = "http://jabber.org/protocol/chatstates"};
				};
				fallback = {
					type = "boolean";
					xml = {x_name_is_value = true; name = "fallback"; namespace = "urn:xmpp:fallback:0"};
				};
				origin_id = {
					type = "string";
					xml = {name = "origin-id"; namespace = "urn:xmpp:sid:0"; x_single_attribute = "id"};
				};
				react = {
					type = "object";
					xml = {namespace = "urn:xmpp:reactions:0"; name = "reactions"};
					properties = {
						to = {type = "string"; xml = {attribute = true; name = "id"}};
						reactions = {type = "array"; items = {type = "string"; xml = {name = "reaction"}}};
					};
				};
				stanza_ids = {
					type = "array";
					items = {
						xml = {name = "stanza-id"; namespace = "urn:xmpp:sid:0"};
						type = "object";
						properties = {
							id = attr();
							by = attr();
						};
					};
				};
			};
		};

		x = xml.parse [[
				<message xmlns="jabber:client" xml:lang="en" to="a@test" from="b@test" type="chat" id="1">
				<body>Hello</body>
				<delay xmlns='urn:xmpp:delay' from='test' stamp='2021-03-07T15:59:08+00:00'>Because</delay>
				<UNRELATED xmlns='http://jabber.org/protocol/chatstates'/>
				<active xmlns='http://jabber.org/protocol/chatstates'/>
				<fallback xmlns='urn:xmpp:fallback:0'/>
				<origin-id xmlns='urn:xmpp:sid:0' id='qgkmMdPB'/>
				<stanza-id xmlns='urn:xmpp:sid:0' id='abc1' by='muc'/>
				<stanza-id xmlns='urn:xmpp:sid:0' id='xyz2' by='host'/>
				<reactions id='744f6e18-a57a-11e9-a656-4889e7820c76' xmlns='urn:xmpp:reactions:0'>
					<reaction>👋</reaction>
					<reaction>🐢</reaction>
				</reactions>
				</message>
				]];

		d = {
			to = "a@test";
			from = "b@test";
			type = "chat";
			id = "1";
			lang = "en";
			body = "Hello";
			delay = {from = "test"; stamp = "2021-03-07T15:59:08+00:00"; reason = "Because"};
			state = "active";
			fallback = true;
			origin_id = "qgkmMdPB";
			stanza_ids = {{id = "abc1"; by = "muc"}; {id = "xyz2"; by = "host"}};
			react = {
				to = "744f6e18-a57a-11e9-a656-4889e7820c76";
				reactions = {
					"👋",
					"🐢",
				};
			};
		};

		disco_schema = {
			type = "object";
			xml = {
				name = "iq";
				namespace = "jabber:client"
			};
			properties = {
				to = attr();
				from = attr();
				type = attr();
				id = attr();
				disco = {
					type = "object";
					xml = {
						name = "query";
						namespace	= "http://jabber.org/protocol/disco#info"
					};
					properties = {
						features = {
							type = "array";
							items = {
								type = "string";
								xml = {
									name = "feature";
									x_single_attribute = "var";
								};
							};
						};
					};
				};
			};
		};

		disco_info = xml.parse[[
		<iq type="result" id="disco1" from="example.com">
			<query xmlns="http://jabber.org/protocol/disco#info">
				<feature var="urn:example:feature:1">wrong</feature>
				<feature var="urn:example:feature:2"/>
				<feature var="urn:example:feature:3"/>
				<unrelated var="urn:example:feature:not"/>
			</query>
		</iq>
		]];

		disco = {
			type="result";
			id="disco1";
			from="example.com";
			disco = {
				features = {
					"urn:example:feature:1";
					"urn:example:feature:2";
					"urn:example:feature:3";
				};
			};
		};
	end);

	describe("parse", function()
		it("works", function()
			assert.same(d, map.parse(s, x));
		end);

		it("handles arrays", function ()
			assert.same(disco, map.parse(disco_schema, disco_info));
		end);

		it("deals with locally built stanzas", function()
			-- FIXME this could also be argued to be a util.stanza problem
			local ver_schema = {
				type = "object";
				xml = {name = "iq"};
				properties = {
					type = {type = "string"; xml = {attribute = true}};
					id = {type = "string"; xml = {attribute = true}};
					version = {
						type = "object";
						xml = {name = "query"; namespace = "jabber:iq:version"};
						properties = {name = "string"; version = "string"; os = "string"};
					};
				};
			};
			local ver_st = st.iq({type = "result"; id = "v1"})
				:query("jabber:iq:version")
					:text_tag("name", "Prosody")
					:text_tag("version", "trunk")
					:text_tag("os", "Lua 5.3")
				:reset();

			local data = {type = "result"; id = "v1"; version = {name = "Prosody"; version = "trunk"; os = "Lua 5.3"}}
			assert.same(data, map.parse(ver_schema, ver_st));
		end);

	end);

	describe("unparse", function()
		it("works", function()
			local u = map.unparse(s, d);
			assert.equal("message", u.name);
			assert.same(x.attr, u.attr);
			assert.equal(x:get_child_text("body"), u:get_child_text("body"));
			assert.equal(x:get_child_text("delay", "urn:xmpp:delay"), u:get_child_text("delay", "urn:xmpp:delay"));
			assert.same(x:get_child("delay", "urn:xmpp:delay").attr, u:get_child("delay", "urn:xmpp:delay").attr);
			assert.same(x:get_child("origin-id", "urn:xmpp:sid:0").attr, u:get_child("origin-id", "urn:xmpp:sid:0").attr);
			assert.same(x:get_child("reactions", "urn:xmpp:reactions:0").attr, u:get_child("reactions", "urn:xmpp:reactions:0").attr);
			assert.same(2, #u:get_child("reactions", "urn:xmpp:reactions:0").tags);
			for _, tag in ipairs(x.tags) do
				if tag.name ~= "UNRELATED" then
					assert.truthy(u:get_child(tag.name, tag.attr.xmlns) or u:get_child(tag.name), tag:top_tag())
				end
			end
			assert.equal(#x.tags-1, #u.tags)

		end);

		it("handles arrays", function ()
			local u = map.unparse(disco_schema, disco);
			assert.equal("urn:example:feature:1", u:find("{http://jabber.org/protocol/disco#info}query/feature/@var"))
			local n = 0;
			for child in u:get_child("query", "http://jabber.org/protocol/disco#info"):childtags("feature") do
				n = n + 1;
				assert.equal(string.format("urn:example:feature:%d", n), child.attr.var);
			end
		end);

	end);
end)