Merge 0.10->trunk
[prosody.git] / plugins / mod_storage_sql1.lua
1
2 --[[
3
4 DB Tables:
5         Prosody - key-value, map
6                 | host | user | store | key | type | value |
7         ProsodyArchive - list
8                 | host | user | store | key | time | stanzatype | jsonvalue |
9
10 Mapping:
11         Roster - Prosody
12                 | host | user | "roster" | "contactjid" | type | value |
13                 | host | user | "roster" | NULL | "json" | roster[false] data |
14         Account - Prosody
15                 | host | user | "accounts" | "username" | type | value |
16
17         Offline - ProsodyArchive
18                 | host | user | "offline" | "contactjid" | time | "message" | json|XML |
19
20 ]]
21
22 local type = type;
23 local tostring = tostring;
24 local tonumber = tonumber;
25 local pairs = pairs;
26 local next = next;
27 local setmetatable = setmetatable;
28 local xpcall = xpcall;
29 local json = require "util.json";
30 local build_url = require"socket.url".build;
31
32 local DBI;
33 local connection;
34 local host,user,store = module.host;
35 local params = module:get_option("sql");
36
37 local dburi;
38 local connections = module:shared "/*/sql/connection-cache";
39
40 local function db2uri(params)
41         return build_url{
42                 scheme = params.driver,
43                 user = params.username,
44                 password = params.password,
45                 host = params.host,
46                 port = params.port,
47                 path = params.database,
48         };
49 end
50
51
52 local resolve_relative_path = require "util.paths".resolve_relative_path;
53
54 local function test_connection()
55         if not connection then return nil; end
56         if connection:ping() then
57                 return true;
58         else
59                 module:log("debug", "Database connection closed");
60                 connection = nil;
61                 connections[dburi] = nil;
62         end
63 end
64 local function connect()
65         if not test_connection() then
66                 prosody.unlock_globals();
67                 local dbh, err = DBI.Connect(
68                         params.driver, params.database,
69                         params.username, params.password,
70                         params.host, params.port
71                 );
72                 prosody.lock_globals();
73                 if not dbh then
74                         module:log("debug", "Database connection failed: %s", tostring(err));
75                         return nil, err;
76                 end
77                 module:log("debug", "Successfully connected to database");
78                 dbh:autocommit(false); -- don't commit automatically
79                 connection = dbh;
80
81                 connections[dburi] = dbh;
82         end
83         return connection;
84 end
85
86 local function create_table()
87         if not module:get_option("sql_manage_tables", true) then
88                 return;
89         end
90         local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
91         if params.driver == "PostgreSQL" then
92                 create_sql = create_sql:gsub("`", "\"");
93         elseif params.driver == "MySQL" then
94                 create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT");
95         end
96
97         local stmt, err = connection:prepare(create_sql);
98         if stmt then
99                 local ok = stmt:execute();
100                 local commit_ok = connection:commit();
101                 if ok and commit_ok then
102                         module:log("info", "Initialized new %s database with prosody table", params.driver);
103                         local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
104                         if params.driver == "PostgreSQL" then
105                                 index_sql = index_sql:gsub("`", "\"");
106                         elseif params.driver == "MySQL" then
107                                 index_sql = index_sql:gsub("`([,)])", "`(20)%1");
108                         end
109                         local stmt, err = connection:prepare(index_sql);
110                         local ok, commit_ok, commit_err;
111                         if stmt then
112                                 ok, err = stmt:execute();
113                                 commit_ok, commit_err = connection:commit();
114                         end
115                         if not(ok and commit_ok) then
116                                 module:log("warn", "Failed to create index (%s), lookups may not be optimised", err or commit_err);
117                         end
118                 elseif params.driver == "MySQL" then  -- COMPAT: Upgrade tables from 0.8.0
119                         -- Failed to create, but check existing MySQL table here
120                         local stmt = connection:prepare("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
121                         local ok = stmt:execute();
122                         local commit_ok = connection:commit();
123                         if ok and commit_ok then
124                                 if stmt:rowcount() > 0 then
125                                         module:log("info", "Upgrading database schema...");
126                                         local stmt = connection:prepare("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
127                                         local ok, err = stmt:execute();
128                                         local commit_ok = connection:commit();
129                                         if ok and commit_ok then
130                                                 module:log("info", "Database table automatically upgraded");
131                                         else
132                                                 module:log("error", "Failed to upgrade database schema (%s), please see "
133                                                         .."https://prosody.im/doc/mysql for help",
134                                                         err or "unknown error");
135                                         end
136                                 end
137                                 repeat until not stmt:fetch();
138                         end
139                 end
140         elseif params.driver ~= "SQLite3" then -- SQLite normally fails to prepare for existing table
141                 module:log("warn", "Prosody was not able to automatically check/create the database table (%s), "
142                         .."see https://prosody.im/doc/modules/mod_storage_sql#table_management for help.",
143                         err or "unknown error");
144         end
145 end
146
147 do -- process options to get a db connection
148         local ok;
149         prosody.unlock_globals();
150         ok, DBI = pcall(require, "DBI");
151         if not ok then
152                 package.loaded["DBI"] = {};
153                 module:log("error", "Failed to load the LuaDBI library for accessing SQL databases: %s", DBI);
154                 module:log("error", "More information on installing LuaDBI can be found at https://prosody.im/doc/depends#luadbi");
155         end
156         prosody.lock_globals();
157         if not ok or not DBI.Connect then
158                 return; -- Halt loading of this module
159         end
160
161         params = params or { driver = "SQLite3" };
162
163         if params.driver == "SQLite3" then
164                 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
165         end
166
167         assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
168
169         dburi = db2uri(params);
170         connection = connections[dburi];
171
172         assert(connect());
173
174         -- Automatically create table, ignore failure (table probably already exists)
175         create_table();
176 end
177
178 local function serialize(value)
179         local t = type(value);
180         if t == "string" or t == "boolean" or t == "number" then
181                 return t, tostring(value);
182         elseif t == "table" then
183                 local value,err = json.encode(value);
184                 if value then return "json", value; end
185                 return nil, err;
186         end
187         return nil, "Unhandled value type: "..t;
188 end
189 local function deserialize(t, value)
190         if t == "string" then return value;
191         elseif t == "boolean" then
192                 if value == "true" then return true;
193                 elseif value == "false" then return false; end
194         elseif t == "number" then return tonumber(value);
195         elseif t == "json" then
196                 return json.decode(value);
197         end
198 end
199
200 local function dosql(sql, ...)
201         if params.driver == "PostgreSQL" then
202                 sql = sql:gsub("`", "\"");
203         end
204         -- do prepared statement stuff
205         local stmt, err = connection:prepare(sql);
206         if not stmt and not test_connection() then error("connection failed"); end
207         if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
208         -- run query
209         local ok, err = stmt:execute(...);
210         if not ok and not test_connection() then error("connection failed"); end
211         if not ok then return nil, err; end
212
213         return stmt;
214 end
215 local function getsql(sql, ...)
216         return dosql(sql, host or "", user or "", store or "", ...);
217 end
218 local function setsql(sql, ...)
219         local stmt, err = getsql(sql, ...);
220         if not stmt then return stmt, err; end
221         return stmt:affected();
222 end
223 local function transact(...)
224         -- ...
225 end
226 local function rollback(...)
227         if connection then connection:rollback(); end -- FIXME check for rollback error?
228         return ...;
229 end
230 local function commit(...)
231         local success,err = connection:commit();
232         if not success then return nil, "SQL commit failed: "..tostring(err); end
233         return ...;
234 end
235
236 local function keyval_store_get()
237         local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
238         if not stmt then return rollback(nil, err); end
239
240         local haveany;
241         local result = {};
242         for row in stmt:rows(true) do
243                 haveany = true;
244                 local k = row.key;
245                 local v = deserialize(row.type, row.value);
246                 if k and v then
247                         if k ~= "" then result[k] = v; elseif type(v) == "table" then
248                                 for a,b in pairs(v) do
249                                         result[a] = b;
250                                 end
251                         end
252                 end
253         end
254         return commit(haveany and result or nil);
255 end
256 local function keyval_store_set(data)
257         local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
258         if not affected then return rollback(affected, err); end
259
260         if data and next(data) ~= nil then
261                 local extradata = {};
262                 for key, value in pairs(data) do
263                         if type(key) == "string" and key ~= "" then
264                                 local t, value = serialize(value);
265                                 if not t then return rollback(t, value); end
266                                 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
267                                 if not ok then return rollback(ok, err); end
268                         else
269                                 extradata[key] = value;
270                         end
271                 end
272                 if next(extradata) ~= nil then
273                         local t, extradata = serialize(extradata);
274                         if not t then return rollback(t, extradata); end
275                         local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", "", t, extradata);
276                         if not ok then return rollback(ok, err); end
277                 end
278         end
279         return commit(true);
280 end
281
282 local keyval_store = {};
283 keyval_store.__index = keyval_store;
284 function keyval_store:get(username)
285         user,store = username,self.store;
286         if not connection and not connect() then return nil, "Unable to connect to database"; end
287         local success, ret, err = xpcall(keyval_store_get, debug.traceback);
288         if not connection and connect() then
289                 success, ret, err = xpcall(keyval_store_get, debug.traceback);
290         end
291         if success then return ret, err; else return rollback(nil, ret); end
292 end
293 function keyval_store:set(username, data)
294         user,store = username,self.store;
295         if not connection and not connect() then return nil, "Unable to connect to database"; end
296         local success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
297         if not connection and connect() then
298                 success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
299         end
300         if success then return ret, err; else return rollback(nil, ret); end
301 end
302 function keyval_store:users()
303         local stmt, err = dosql("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
304         if not stmt then
305                 return rollback(nil, err);
306         end
307         local next = stmt:rows();
308         return commit(function()
309                 local row = next();
310                 return row and row[1];
311         end);
312 end
313
314 local function map_store_get(key)
315         local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
316         if not stmt then return rollback(nil, err); end
317
318         local haveany;
319         local result = {};
320         for row in stmt:rows(true) do
321                 haveany = true;
322                 local k = row.key;
323                 local v = deserialize(row.type, row.value);
324                 if k and v then
325                         if k ~= "" then result[k] = v; elseif type(v) == "table" then
326                                 for a,b in pairs(v) do
327                                         result[a] = b;
328                                 end
329                         end
330                 end
331         end
332         return commit(haveany and result[key] or nil);
333 end
334 local function map_store_set(key, data)
335         local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
336         if not affected then return rollback(affected, err); end
337
338         if data and next(data) ~= nil then
339                 if type(key) == "string" and key ~= "" then
340                         local t, value = serialize(data);
341                         if not t then return rollback(t, value); end
342                         local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
343                         if not ok then return rollback(ok, err); end
344                 else
345                         -- TODO non-string keys
346                 end
347         end
348         return commit(true);
349 end
350
351 local map_store = {};
352 map_store.__index = map_store;
353 function map_store:get(username, key)
354         user,store = username,self.store;
355         local success, ret, err = xpcall(function() return map_store_get(key); end, debug.traceback);
356         if success then return ret, err; else return rollback(nil, ret); end
357 end
358 function map_store:set(username, key, data)
359         user,store = username,self.store;
360         local success, ret, err = xpcall(function() return map_store_set(key, data); end, debug.traceback);
361         if success then return ret, err; else return rollback(nil, ret); end
362 end
363
364 local list_store = {};
365 list_store.__index = list_store;
366 function list_store:scan(username, from, to, jid, typ)
367         user,store = username,self.store;
368
369         local cols = {"from", "to", "jid", "typ"};
370         local vals = { from ,  to ,  jid ,  typ };
371         local stmt, err;
372         local query = "SELECT * FROM `prosodyarchive` WHERE `host`=? AND `user`=? AND `store`=?";
373
374         query = query.." ORDER BY time";
375         --local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
376
377         return nil, "not-implemented"
378 end
379
380 local driver = {};
381
382 function driver:open(store, typ)
383         if typ and typ ~= "keyval" then
384                 return nil, "unsupported-store";
385         end
386         return setmetatable({ store = store }, keyval_store);
387 end
388
389 function driver:stores(username)
390         local sql = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
391                 (username == true and "!=?" or "=?");
392         if username == true or not username then
393                 username = "";
394         end
395         local stmt, err = dosql(sql, host, username);
396         if not stmt then
397                 return rollback(nil, err);
398         end
399         local next = stmt:rows();
400         return commit(function()
401                 local row = next();
402                 return row and row[1];
403         end);
404 end
405
406 function driver:purge(username)
407         local stmt, err = dosql("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
408         if not stmt then return rollback(stmt, err); end
409         local changed, err = stmt:affected();
410         if not changed then return rollback(changed, err); end
411         return commit(true, changed);
412 end
413
414 module:provides("storage", driver);