Annotate

plugins/mod_storage_sql.lua @ 4218:8a271b3fcaa7

mod_storage_sql: Display friendlier error when LuaDBI is missing
author Matthew Wild <mwild1@gmail.com>
date Tue, 01 Mar 2011 06:12:43 +0000
parent 4109:d26db1f936f8
child 4285:c806a599224a
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2 --[[
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4 DB Tables:
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5 Prosody - key-value, map
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6 | host | user | store | key | type | value |
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7 ProsodyArchive - list
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8 | host | user | store | key | time | stanzatype | jsonvalue |
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10 Mapping:
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11 Roster - Prosody
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12 | host | user | "roster" | "contactjid" | type | value |
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13 | host | user | "roster" | NULL | "json" | roster[false] data |
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14 Account - Prosody
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15 | host | user | "accounts" | "username" | type | value |
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17 Offline - ProsodyArchive
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18 | host | user | "offline" | "contactjid" | time | "message" | json|XML |
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20 ]]
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22 local type = type;
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23 local tostring = tostring;
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24 local tonumber = tonumber;
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25 local pairs = pairs;
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26 local next = next;
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27 local setmetatable = setmetatable;
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28 local xpcall = xpcall;
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29 local json = require "util.json";
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31 local DBI;
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32 local connection;
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33 local host,user,store = module.host;
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34 local params = module:get_option("sql");
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35
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36 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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37
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38 local function test_connection()
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39 if not connection then return nil; end
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40 if connection:ping() then
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41 return true;
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42 else
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43 module:log("debug", "Database connection closed");
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44 connection = nil;
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45 end
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46 end
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47 local function connect()
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48 if not test_connection() then
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49 prosody.unlock_globals();
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50 local dbh, err = DBI.Connect(
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51 params.driver, params.database,
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52 params.username, params.password,
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53 params.host, params.port
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54 );
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55 prosody.lock_globals();
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56 if not dbh then
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57 module:log("debug", "Database connection failed: %s", tostring(err));
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58 return nil, err;
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59 end
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60 module:log("debug", "Successfully connected to database");
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61 dbh:autocommit(false); -- don't commit automatically
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62 connection = dbh;
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63 return connection;
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64 end
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65 end
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66
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67 local function create_table()
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68 local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
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69 if params.driver == "PostgreSQL" then
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70 create_sql = create_sql:gsub("`", "\"");
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71 end
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72
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73 local stmt = connection:prepare(create_sql);
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74 if stmt then
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75 local ok = stmt:execute();
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76 local commit_ok = connection:commit();
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77 if ok and commit_ok then
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78 module:log("info", "Initialized new %s database with prosody table", params.driver);
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79 local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
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80 if params.driver == "PostgreSQL" then
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81 index_sql = index_sql:gsub("`", "\"");
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82 elseif params.driver == "MySQL" then
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83 index_sql = index_sql:gsub("`([,)])", "`(20)%1");
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84 end
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85 local stmt, err = connection:prepare(index_sql);
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86 local ok, commit_ok, commit_err;
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87 if stmt then
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88 ok, err = stmt:execute();
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89 commit_ok, commit_err = connection:commit();
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90 end
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91 if not(ok and commit_ok) then
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92 module:log("warn", "Failed to create index (%s), lookups may not be optimised", err or commit_err);
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93 end
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94 end
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95 end
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96 end
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97
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98 do -- process options to get a db connection
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99 local ok;
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100 prosody.unlock_globals();
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101 ok, DBI = pcall(require, "DBI");
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102 if not ok then
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103 package.loaded["DBI"] = {};
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104 module:log("error", "Failed to load the LuaDBI library for accessing SQL databases: %s", DBI);
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105 module:log("error", "More information on installing LuaDBI can be found at http://prosody.im/doc/depends#luadbi");
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106 end
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107 prosody.lock_globals();
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108 if not ok or not DBI.Connect then
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109 return; -- Halt loading of this module
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110 end
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111
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112 params = params or { driver = "SQLite3" };
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113
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114 if params.driver == "SQLite3" then
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115 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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116 end
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117
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118 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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119
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120 assert(connect());
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121
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122 -- Automatically create table, ignore failure (table probably already exists)
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123 create_table();
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124 end
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125
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126 local function serialize(value)
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127 local t = type(value);
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128 if t == "string" or t == "boolean" or t == "number" then
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diff changeset
129 return t, tostring(value);
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130 elseif t == "table" then
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131 local value,err = json.encode(value);
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132 if value then return "json", value; end
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133 return nil, err;
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134 end
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135 return nil, "Unhandled value type: "..t;
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136 end
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137 local function deserialize(t, value)
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138 if t == "string" then return value;
3851
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139 elseif t == "boolean" then
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140 if value == "true" then return true;
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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141 elseif value == "false" then return false; end
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142 elseif t == "number" then return tonumber(value);
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parents: 3864
diff changeset
143 elseif t == "json" then
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144 return json.decode(value);
3851
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145 end
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146 end
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147
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148 local function getsql(sql, ...)
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149 if params.driver == "PostgreSQL" then
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150 sql = sql:gsub("`", "\"");
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151 end
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152 -- do prepared statement stuff
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153 local stmt, err = connection:prepare(sql);
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154 if not stmt and not test_connection() then error("connection failed"); end
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155 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
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156 -- run query
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3294f12ea602 mod_storage_sql: Quote identifiers in SQL with backquotes, and use the empty string for NULL, and '=' instead of 'IS' for comparison, to work with MySQL's limitations...
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157 local ok, err = stmt:execute(host or "", user or "", store or "", ...);
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158 if not ok and not test_connection() then error("connection failed"); end
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159 if not ok then return nil, err; end
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160
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161 return stmt;
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162 end
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163 local function setsql(sql, ...)
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164 local stmt, err = getsql(sql, ...);
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165 if not stmt then return stmt, err; end
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166 return stmt:affected();
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167 end
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168 local function transact(...)
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169 -- ...
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170 end
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171 local function rollback(...)
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172 if connection then connection:rollback(); end -- FIXME check for rollback error?
3851
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173 return ...;
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174 end
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diff changeset
175 local function commit(...)
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diff changeset
176 if not connection:commit() then return nil, "SQL commit failed"; end
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diff changeset
177 return ...;
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178 end
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179
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180 local function keyval_store_get()
4101
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181 local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
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diff changeset
182 if not stmt then return rollback(nil, err); end
3851
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183
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184 local haveany;
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185 local result = {};
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186 for row in stmt:rows(true) do
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187 haveany = true;
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188 local k = row.key;
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189 local v = deserialize(row.type, row.value);
4045
054e05b27611 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
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parents: 4044
diff changeset
190 if k and v then
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parents: 4044
diff changeset
191 if k ~= "" then result[k] = v; elseif type(v) == "table" then
3851
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192 for a,b in pairs(v) do
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diff changeset
193 result[a] = b;
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194 end
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195 end
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diff changeset
196 end
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197 end
4043
d3f5c60a72b1 mod_storage_sql: Call commit() after all SQL statements, including SELECT, to get SQLite to drop its locks.
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parents: 4042
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198 return commit(haveany and result or nil);
3851
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199 end
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diff changeset
200 local function keyval_store_set(data)
4101
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parents: 4096
diff changeset
201 local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
4105
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parents: 4101
diff changeset
202 if not affected then return rollback(affected, err); end
3851
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parents:
diff changeset
203
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
204 if data and next(data) ~= nil then
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
205 local extradata = {};
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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diff changeset
206 for key, value in pairs(data) do
4042
3294f12ea602 mod_storage_sql: Quote identifiers in SQL with backquotes, and use the empty string for NULL, and '=' instead of 'IS' for comparison, to work with MySQL's limitations...
Waqas Hussain <waqas20@gmail.com>
parents: 3891
diff changeset
207 if type(key) == "string" and key ~= "" then
3851
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parents:
diff changeset
208 local t, value = serialize(value);
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
209 if not t then return rollback(t, value); end
4101
06778bc27d53 mod_storage_sql: Create table automatically for all databases now, not just SQLite. Also rename table from Prosody -> prosody.
Matthew Wild <mwild1@gmail.com>
parents: 4096
diff changeset
210 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
3851
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
211 if not ok then return rollback(ok, err); end
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parents:
diff changeset
212 else
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
213 extradata[key] = value;
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
215 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
216 if next(extradata) ~= nil then
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
217 local t, extradata = serialize(extradata);
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
218 if not t then return rollback(t, extradata); end
4101
06778bc27d53 mod_storage_sql: Create table automatically for all databases now, not just SQLite. Also rename table from Prosody -> prosody.
Matthew Wild <mwild1@gmail.com>
parents: 4096
diff changeset
219 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", "", t, extradata);
3851
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
220 if not ok then return rollback(ok, err); end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
221 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
222 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
223 return commit(true);
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
224 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
225
4073
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diff changeset
226 local keyval_store = {};
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4070
diff changeset
227 keyval_store.__index = keyval_store;
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4070
diff changeset
228 function keyval_store:get(username)
3851
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parents:
diff changeset
229 user,store = username,self.store;
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parents: 4101
diff changeset
230 if not connection and not connect() then return nil, "Unable to connect to database"; end
4073
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4070
diff changeset
231 local success, ret, err = xpcall(keyval_store_get, debug.traceback);
4105
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parents: 4101
diff changeset
232 if not connection and connect() then
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
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parents: 4101
diff changeset
233 success, ret, err = xpcall(keyval_store_get, debug.traceback);
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
234 end
4073
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parents: 4070
diff changeset
235 if success then return ret, err; else return rollback(nil, ret); end
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
236 end
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
237 function keyval_store:set(username, data)
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
238 user,store = username,self.store;
4105
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Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
239 if not connection and not connect() then return nil, "Unable to connect to database"; end
4073
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4070
diff changeset
240 local success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
4105
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parents: 4101
diff changeset
241 if not connection and connect() then
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
242 success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
243 end
4073
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
244 if success then return ret, err; else return rollback(nil, ret); end
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
245 end
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
246
79fd38ab224b mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4070
diff changeset
247 local function map_store_get(key)
4101
06778bc27d53 mod_storage_sql: Create table automatically for all databases now, not just SQLite. Also rename table from Prosody -> prosody.
Matthew Wild <mwild1@gmail.com>
parents: 4096
diff changeset
248 local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
4105
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parents: 4101
diff changeset
249 if not stmt then return rollback(nil, err); end
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250
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251 local haveany;
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252 local result = {};
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253 for row in stmt:rows(true) do
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254 haveany = true;
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255 local k = row.key;
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256 local v = deserialize(row.type, row.value);
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257 if k and v then
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258 if k ~= "" then result[k] = v; elseif type(v) == "table" then
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259 for a,b in pairs(v) do
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260 result[a] = b;
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261 end
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262 end
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263 end
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264 end
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265 return commit(haveany and result[key] or nil);
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266 end
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267 local function map_store_set(key, data)
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268 local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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269 if not affected then return rollback(affected, err); end
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270
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271 if data and next(data) ~= nil then
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272 if type(key) == "string" and key ~= "" then
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273 local t, value = serialize(data);
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274 if not t then return rollback(t, value); end
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275 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
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276 if not ok then return rollback(ok, err); end
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277 else
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278 -- TODO non-string keys
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279 end
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280 end
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281 return commit(true);
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282 end
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283
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284 local map_store = {};
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285 map_store.__index = map_store;
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286 function map_store:get(username, key)
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287 user,store = username,self.store;
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288 local success, ret, err = xpcall(function() return map_store_get(key); end, debug.traceback);
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289 if success then return ret, err; else return rollback(nil, ret); end
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290 end
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291 function map_store:set(username, key, data)
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292 user,store = username,self.store;
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293 local success, ret, err = xpcall(function() return map_store_set(key, data); end, debug.traceback);
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294 if success then return ret, err; else return rollback(nil, ret); end
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295 end
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296
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297 local list_store = {};
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298 list_store.__index = list_store;
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299 function list_store:scan(username, from, to, jid, typ)
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300 user,store = username,self.store;
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301
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302 local cols = {"from", "to", "jid", "typ"};
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303 local vals = { from , to , jid , typ };
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304 local stmt, err;
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305 local query = "SELECT * FROM `prosodyarchive` WHERE `host`=? AND `user`=? AND `store`=?";
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306
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307 query = query.." ORDER BY time";
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308 --local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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309
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310 return nil, "not-implemented"
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311 end
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312
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313 local driver = { name = "sql" };
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314
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315 function driver:open(store, typ)
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316 if not typ then -- default key-value store
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317 return setmetatable({ store = store }, keyval_store);
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318 end
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319 return nil, "unsupported-store";
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320 end
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321
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322 module:add_item("data-driver", driver);