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authorMatthew Wild <mwild1@gmail.com>2013-04-18 11:13:40 +0100
committerMatthew Wild <mwild1@gmail.com>2013-04-18 11:13:40 +0100
commit7d92759bf8162dab463e4624a26642c1015a44d8 (patch)
treea3a9a8ff5de3a20a633b079bd5e5e81eaaad39af /plugins/mod_storage_sql2.lua
parent1da2e8a43efbe7dc97b43446972e3c0e50daa37b (diff)
downloadprosody-7d92759bf8162dab463e4624a26642c1015a44d8.tar.gz
prosody-7d92759bf8162dab463e4624a26642c1015a44d8.zip
mod_storage_sql2 (temporary name), sql.lib, util.sql: New SQL API supporting cross-module connection sharing, transactions and Things - a work in progress
Diffstat (limited to 'plugins/mod_storage_sql2.lua')
-rw-r--r--plugins/mod_storage_sql2.lua237
1 files changed, 237 insertions, 0 deletions
diff --git a/plugins/mod_storage_sql2.lua b/plugins/mod_storage_sql2.lua
new file mode 100644
index 00000000..7d705b0b
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+++ b/plugins/mod_storage_sql2.lua
@@ -0,0 +1,237 @@
+
+local json = require "util.json";
+local resolve_relative_path = require "core.configmanager".resolve_relative_path;
+
+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="TEXT", nullable=false };
+ Index { name="prosody_index", "host", "user", "store", "key" };
+ };
+ engine:transaction(function()
+ ProsodyTable:create(engine);
+ end);]]
+ if not module:get_option("sql_manage_tables", true) then
+ return;
+ end
+
+ local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
+ if params.driver == "PostgreSQL" then
+ create_sql = create_sql:gsub("`", "\"");
+ elseif params.driver == "MySQL" then
+ create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT")
+ :gsub(";$", " CHARACTER SET 'utf8' COLLATE 'utf8_bin';");
+ end
+
+ local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
+ if params.driver == "PostgreSQL" then
+ index_sql = index_sql:gsub("`", "\"");
+ elseif params.driver == "MySQL" then
+ index_sql = index_sql:gsub("`([,)])", "`(20)%1");
+ end
+
+ local success,err = engine:transaction(function()
+ engine:execute(create_sql);
+ engine:execute(index_sql);
+ end);
+ if not success then -- so we failed to create
+ if params.driver == "MySQL" then
+ success,err = engine:transaction(function()
+ local result = engine:execute("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
+ if result:rowcount() > 0 then
+ module:log("info", "Upgrading database schema...");
+ engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
+ module:log("info", "Database table automatically upgraded");
+ end
+ return true;
+ end);
+ if not success then
+ module:log("error", "Failed to check/upgrade database schema (%s), please see "
+ .."http://prosody.im/doc/mysql for help",
+ err or "unknown error");
+ end
+ end
+ end
+end
+local function set_encoding()
+ if params.driver ~= "SQLite3" then
+ local set_names_query = "SET NAMES 'utf8';";
+ if params.driver == "MySQL" then
+ set_names_query = set_names_query:gsub(";$", " COLLATE 'utf8_bin';");
+ end
+ local success,err = engine:transaction(function() return engine:execute(set_names_query); end);
+ if not success then
+ module:log("error", "Failed to set database connection encoding to UTF8: %s", err);
+ return;
+ end
+ if params.driver == "MySQL" then
+ -- 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' );";
+ local 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 success: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);
+ local 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
+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);
+
+ -- Encoding mess
+ set_encoding();
+
+ -- Automatically create table, ignore failure (table probably already exists)
+ create_table();
+end
+
+local function serialize(value)
+ local t = type(value);
+ if t == "string" or t == "boolean" or t == "number" then
+ return t, 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);
+ 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, 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, 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, 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, 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()
+ return engine:transaction(function()
+ return engine:select("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
+ end);
+end
+
+local driver = {};
+
+function driver:open(store, typ)
+ if not typ then -- default key-value store
+ return setmetatable({ store = store }, keyval_store);
+ 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
+ return engine:transaction(function()
+ return engine:select(sql, host, username);
+ end);
+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);
+
+