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plugins/mod_storage_sql2.lua @ 6099:c8a749298d51
plugins/muc/muc.lib: Make use of return values to send service-unavailable errors
author | daurnimator <quae@daurnimator.com> |
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date | Fri, 21 Feb 2014 17:52:40 -0500 |
parent | 6013:918ab89cb68d |
child | 6060:de4c83feb064 |
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local json = require "util.json"; local xml_parse = require "util.xml".parse; local uuid = require "util.uuid"; local resolve_relative_path = require "core.configmanager".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 mod_sql = module:require("sql"); local params = module:get_option("sql"); local engine; -- TODO create engine local function create_table() local Table,Column,Index = mod_sql.Table,mod_sql.Column,mod_sql.Index; local ProsodyTable = Table { name="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() 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 module:log("info", "Upgrading database schema..."); engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT"); module:log("info", "Database table automatically upgraded"); 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-0.9: Upgrade tables 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 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); 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"); end end end do -- process options to get a db connection params = params or { driver = "SQLite3" }; 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, "Both the SQL driver and the database need to be specified"); --local dburi = db2uri(params); engine = mod_sql:create_engine(params); engine:set_encoding(); if module:get_option("sql_manage_tables", true) then -- Automatically create table, ignore failure (table probably already exists) create_table(); -- Encoding mess upgrade_table(); end end 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 local keyval_store = {}; keyval_store.__index = keyval_store; function keyval_store:get(username) user,store = username,self.store; return select(2, engine:transaction(keyval_store_get)); 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 local archive_store = {} archive_store.__index = archive_store function archive_store:append(username, key, when, with, value) if value == nil then -- COMPAT early versions when, with, value, key = key, when, with, value 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` 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(sql_query:gsub("^(SELECT).-(FROM)", "%1 COUNT(*) %2"):format(t_concat(where, " AND "), "DESC", ""), 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]; 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; archive = archive_store; }; 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 sql = "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(sql, 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 module:provides("storage", driver);