aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_storage_sql2.lua
blob: 1702108cc9982ebeac5b1596012773b6f5106c4a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440

local json = require "util.json";
local sql = require "util.sql";
local xml_parse = require "util.xml".parse;
local uuid = require "util.uuid";
local resolve_relative_path = require "util.paths".resolve_relative_path;

local stanza_mt = require"util.stanza".stanza_mt;
local getmetatable = getmetatable;
local t_concat = table.concat;
local function is_stanza(x) return getmetatable(x) == stanza_mt; end

local noop = function() end
local unpack = unpack
local function iterator(result)
	return function(result)
		local row = result();
		if row ~= nil then
			return unpack(row);
		end
	end, result, nil;
end

local default_params = { driver = "SQLite3" };

local engine;

local function serialize(value)
	local t = type(value);
	if t == "string" or t == "boolean" or t == "number" then
		return t, tostring(value);
	elseif is_stanza(value) then
		return "xml", tostring(value);
	elseif t == "table" then
		local value,err = json.encode(value);
		if value then return "json", value; end
		return nil, err;
	end
	return nil, "Unhandled value type: "..t;
end
local function deserialize(t, value)
	if t == "string" then return value;
	elseif t == "boolean" then
		if value == "true" then return true;
		elseif value == "false" then return false; end
	elseif t == "number" then return tonumber(value);
	elseif t == "json" then
		return json.decode(value);
	elseif t == "xml" then
		return xml_parse(value);
	end
end

local host = module.host;
local user, store;

local function keyval_store_get()
	local haveany;
	local result = {};
	for row in engine:select("SELECT `key`,`type`,`value` FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store) do
		haveany = true;
		local k = row[1];
		local v = deserialize(row[2], row[3]);
		if k and v then
			if k ~= "" then result[k] = v; elseif type(v) == "table" then
				for a,b in pairs(v) do
					result[a] = b;
				end
			end
		end
	end
	if haveany then
		return result;
	end
end
local function keyval_store_set(data)
	engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store);

	if data and next(data) ~= nil then
		local extradata = {};
		for key, value in pairs(data) do
			if type(key) == "string" and key ~= "" then
				local t, value = serialize(value);
				assert(t, value);
				engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, key, t, value);
			else
				extradata[key] = value;
			end
		end
		if next(extradata) ~= nil then
			local t, extradata = serialize(extradata);
			assert(t, extradata);
			engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, "", t, extradata);
		end
	end
	return true;
end

--- Key/value store API (default store type)

local keyval_store = {};
keyval_store.__index = keyval_store;
function keyval_store:get(username)
	user, store = username, self.store;
	local ok, result = engine:transaction(keyval_store_get);
	if not ok then
		module:log("error", "Unable to read from database %s store for %s: %s", store, username or "<host>", result);
		return nil, result;
	end
	return result;
end
function keyval_store:set(username, data)
	user,store = username,self.store;
	return engine:transaction(function()
		return keyval_store_set(data);
	end);
end
function keyval_store:users()
	local ok, result = engine:transaction(function()
		return engine:select("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
	end);
	if not ok then return ok, result end
	return iterator(result);
end

--- Archive store API

local map_store = {};
map_store.__index = map_store;
function map_store:get(username, key)
	local ok, result = engine:transaction(function()
		if type(key) == "string" and key ~= "" then
			for row in engine:select("SELECT `type`, `value` FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", host, username or "", self.store, key) do
				return deserialize(row[1], row[2]);
			end
		else
			error("TODO: non-string keys");
		end
	end);
	if not ok then return nil, result; end
	return result;
end
function map_store:set(username, key, data)
	local ok, result = engine:transaction(function()
		if type(key) == "string" and key ~= "" then
			engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?",
				host, username or "", self.store, key);
			if data ~= nil then
				local t, value = assert(serialize(data));
				engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, username or "", self.store, key, t, value);
			end
		else
			error("TODO: non-string keys");
		end
		return true;
	end);
	if not ok then return nil, result; end
	return result;
end

local archive_store = {}
archive_store.caps = {
	total = true;
};
archive_store.__index = archive_store
function archive_store:append(username, key, value, when, with)
	if type(when) ~= "number" then
		when, with, value = value, when, with;
	end
	local user,store = username,self.store;
	return engine:transaction(function()
		if key then
			engine:delete("DELETE FROM `prosodyarchive` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", host, user or "", store, key);
		else
			key = uuid.generate();
		end
		local t, value = serialize(value);
		engine:insert("INSERT INTO `prosodyarchive` (`host`, `user`, `store`, `when`, `with`, `key`, `type`, `value`) VALUES (?,?,?,?,?,?,?,?)", host, user or "", store, when, with, key, t, value);
		return key;
	end);
end

-- Helpers for building the WHERE clause
local function archive_where(query, args, where)
	-- Time range, inclusive
	if query.start then
		args[#args+1] = query.start
		where[#where+1] = "`when` >= ?"
	end

	if query["end"] then
		args[#args+1] = query["end"];
		if query.start then
			where[#where] = "`when` BETWEEN ? AND ?" -- is this inclusive?
		else
			where[#where+1] = "`when` <= ?"
		end
	end

	-- Related name
	if query.with then
		where[#where+1] = "`with` = ?";
		args[#args+1] = query.with
	end

	-- Unique id
	if query.key then
		where[#where+1] = "`key` = ?";
		args[#args+1] = query.key
	end
end
local function archive_where_id_range(query, args, where)
	local args_len = #args
	-- Before or after specific item, exclusive
	if query.after then  -- keys better be unique!
		where[#where+1] = "`sort_id` > (SELECT `sort_id` FROM `prosodyarchive` WHERE `key` = ? AND `host` = ? AND `user` = ? AND `store` = ? LIMIT 1)"
		args[args_len+1], args[args_len+2], args[args_len+3], args[args_len+4] = query.after, args[1], args[2], args[3];
		args_len = args_len + 4
	end
	if query.before then
		where[#where+1] = "`sort_id` < (SELECT `sort_id` FROM `prosodyarchive` WHERE `key` = ? AND `host` = ? AND `user` = ? AND `store` = ? LIMIT 1)"
		args[args_len+1], args[args_len+2], args[args_len+3], args[args_len+4] = query.before, args[1], args[2], args[3];
	end
end

function archive_store:find(username, query)
	query = query or {};
	local user,store = username,self.store;
	local total;
	local ok, result = engine:transaction(function()
		local sql_query = "SELECT `key`, `type`, `value`, `when`, `with` FROM `prosodyarchive` WHERE %s ORDER BY `sort_id` %s%s;";
		local args = { host, user or "", store, };
		local where = { "`host` = ?", "`user` = ?", "`store` = ?", };

		archive_where(query, args, where);

		-- Total matching
		if query.total then
			local stats = engine:select("SELECT COUNT(*) FROM `prosodyarchive` WHERE " .. t_concat(where, " AND "), unpack(args));
			if stats then
				local _total = stats()
				total = _total and _total[1];
			end
			if query.limit == 0 then -- Skip the real query
				return noop, total;
			end
		end

		archive_where_id_range(query, args, where);

		if query.limit then
			args[#args+1] = query.limit;
		end

		sql_query = sql_query:format(t_concat(where, " AND "), query.reverse and "DESC" or "ASC", query.limit and " LIMIT ?" or "");
		module:log("debug", sql_query);
		return engine:select(sql_query, unpack(args));
	end);
	if not ok then return ok, result end
	return function()
		local row = result();
		if row ~= nil then
			return row[1], deserialize(row[2], row[3]), row[4], row[5];
		end
	end, total;
end

function archive_store:delete(username, query)
	query = query or {};
	local user,store = username,self.store;
	return engine:transaction(function()
		local sql_query = "DELETE FROM `prosodyarchive` WHERE %s;";
		local args = { host, user or "", store, };
		local where = { "`host` = ?", "`user` = ?", "`store` = ?", };
		if user == true then
			table.remove(args, 2);
			table.remove(where, 2);
		end
		archive_where(query, args, where);
		archive_where_id_range(query, args, where);
		sql_query = sql_query:format(t_concat(where, " AND "));
		module:log("debug", sql_query);
		return engine:delete(sql_query, unpack(args));
	end);
end

local stores = {
	keyval = keyval_store;
	map = map_store;
	archive = archive_store;
};

--- Implement storage driver API

-- FIXME: Some of these operations need to operate on the archive store(s) too

local driver = {};

function driver:open(store, typ)
	local store_mt = stores[typ or "keyval"];
	if store_mt then
		return setmetatable({ store = store }, store_mt);
	end
	return nil, "unsupported-store";
end

function driver:stores(username)
	local query = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
		(username == true and "!=?" or "=?");
	if username == true or not username then
		username = "";
	end
	local ok, result = engine:transaction(function()
		return engine:select(query, host, username);
	end);
	if not ok then return ok, result end
	return iterator(result);
end

function driver:purge(username)
	return engine:transaction(function()
		local stmt,err = engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
		return true, err;
	end);
end

--- Initialization


local function create_table(name)
	local Table, Column, Index = sql.Table, sql.Column, sql.Index;

	local ProsodyTable = Table {
		name= name or "prosody";
		Column { name="host", type="TEXT", nullable=false };
		Column { name="user", type="TEXT", nullable=false };
		Column { name="store", type="TEXT", nullable=false };
		Column { name="key", type="TEXT", nullable=false };
		Column { name="type", type="TEXT", nullable=false };
		Column { name="value", type="MEDIUMTEXT", nullable=false };
		Index { name="prosody_index", "host", "user", "store", "key" };
	};
	engine:transaction(function()
		ProsodyTable:create(engine);
	end);

	local ProsodyArchiveTable = Table {
		name="prosodyarchive";
		Column { name="sort_id", type="INTEGER", primary_key=true, auto_increment=true };
		Column { name="host", type="TEXT", nullable=false };
		Column { name="user", type="TEXT", nullable=false };
		Column { name="store", type="TEXT", nullable=false };
		Column { name="key", type="TEXT", nullable=false }; -- item id
		Column { name="when", type="INTEGER", nullable=false }; -- timestamp
		Column { name="with", type="TEXT", nullable=false }; -- related id
		Column { name="type", type="TEXT", nullable=false };
		Column { name="value", type="MEDIUMTEXT", nullable=false };
		Index { name="prosodyarchive_index", unique = true, "host", "user", "store", "key" };
	};
	engine:transaction(function()
		ProsodyArchiveTable:create(engine);
	end);
end

local function upgrade_table(params, apply_changes)
	local changes = false;
	if params.driver == "MySQL" then
		local success,err = engine:transaction(function()
			local result = engine:execute("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
			if result:rowcount() > 0 then
				changes = true;
				if apply_changes then
					module:log("info", "Upgrading database schema...");
					engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
					module:log("info", "Database table automatically upgraded");
				end
			end
			return true;
		end);
		if not success then
			module:log("error", "Failed to check/upgrade database schema (%s), please see "
				.."http://prosody.im/doc/mysql for help",
				err or "unknown error");
			return false;
		end

		-- COMPAT w/pre-0.10: Upgrade table to UTF-8 if not already
		local check_encoding_query = "SELECT `COLUMN_NAME`,`COLUMN_TYPE` FROM `information_schema`.`columns` WHERE `TABLE_NAME`='prosody' AND ( `CHARACTER_SET_NAME`!='utf8' OR `COLLATION_NAME`!='utf8_bin' );";
		success,err = engine:transaction(function()
			local result = engine:execute(check_encoding_query);
			local n_bad_columns = result:rowcount();
			if n_bad_columns > 0 then
				changes = true;
				if apply_changes then
					module:log("warn", "Found %d columns in prosody table requiring encoding change, updating now...", n_bad_columns);
					local fix_column_query1 = "ALTER TABLE `prosody` CHANGE `%s` `%s` BLOB;";
					local fix_column_query2 = "ALTER TABLE `prosody` CHANGE `%s` `%s` %s CHARACTER SET 'utf8' COLLATE 'utf8_bin';";
					for row in result:rows() do
						local column_name, column_type = unpack(row);
						engine:execute(fix_column_query1:format(column_name, column_name));
						engine:execute(fix_column_query2:format(column_name, column_name, column_type));
					end
					module:log("info", "Database encoding upgrade complete!");
				end
			end
		end);
		success,err = engine:transaction(function() return engine:execute(check_encoding_query); end);
		if not success then
			module:log("error", "Failed to check/upgrade database encoding: %s", err or "unknown error");
			return false;
		end
	end
end

local function normalize_params(params)
	if params.driver == "SQLite3" then
		params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
	end
	assert(params.driver and params.database, "Configuration error: Both the SQL driver and the database need to be specified");
	return params;
end

function module.load()
	if prosody.prosodyctl then return; end
	local params = normalize_params(module:get_option("sql", default_params));
	engine = sql:create_engine(params, function (engine)
		if module:get_option("sql_manage_tables", true) then
			-- Automatically create table, ignore failure (table probably already exists)
			-- FIXME: we should check in information_schema, etc.
			create_table();
			-- Check whether the table needs upgrading
			if not upgrade_table(params, true) then
				module:log("error", "Old database format detected, and upgrade failed");
				return false, "database upgrade needed";
			end
		end
	end);

	module:provides("storage", driver);
end