prosody
3294f12ea602
plugins/mod_storage_sql.lua

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plugins/mod_storage_sql.lua @ 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...
author Waqas Hussain <waqas20@gmail.com>
date Mon, 27 Dec 2010 06:10:35 +0500
parent 3891:f82af9f7f1cd
child 3975:aa5e93e61760
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2 --[[
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3
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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 | subkey | 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" | item-subkey | type | value |
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13 | host | user | "roster" | NULL | NULL | "json" | roster[false] data |
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14 Account - Prosody
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15 | host | user | "accounts" | "username" | NULL | 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 json = { stringify = function(s) return require"util.serialization".serialize(s) end, parse = require"util.serialization".deserialize };
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30 local connection = ...;
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31 local host,user,store = module.host;
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32
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33 do -- process options to get a db connection
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34 local DBI = require "DBI";
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35
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36 local params = module:get_option("sql") or { driver = "SQLite3", database = "prosody.sqlite" };
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37 assert(params and params.driver and params.database, "invalid params");
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38
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39 prosody.unlock_globals();
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40 local dbh, err = DBI.Connect(
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41 params.driver, params.database,
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42 params.username, params.password,
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43 params.host, params.port
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44 );
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45 prosody.lock_globals();
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46 assert(dbh, err);
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47
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48 dbh:autocommit(false); -- don't commit automatically
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49 connection = dbh;
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50
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51 if params.driver == "SQLite3" then -- auto initialize
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52 local stmt = assert(connection:prepare("SELECT COUNT(*) FROM `sqlite_master` WHERE `type`='table' AND `name`='Prosody';"));
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53 local ok = assert(stmt:execute());
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54 local count = stmt:fetch()[1];
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55 if count == 0 then
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56 local stmt = assert(connection:prepare("CREATE TABLE `Prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `subkey` TEXT, `type` TEXT, `value` TEXT);"));
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57 assert(stmt:execute());
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58 assert(connection:commit());
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59 module:log("debug", "Initialized new SQLite3 database");
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60 end
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61 --print("===", json.stringify())
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62 end
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63 end
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64
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65 local function serialize(value)
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66 local t = type(value);
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67 if t == "string" or t == "boolean" or t == "number" then
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68 return t, tostring(value);
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69 elseif t == "table" then
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70 local value,err = json.stringify(value);
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71 if value then return "json", value; end
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72 return nil, err;
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73 end
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74 return nil, "Unhandled value type: "..t;
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75 end
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76 local function deserialize(t, value)
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77 if t == "string" then return value;
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78 elseif t == "boolean" then
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79 if value == "true" then return true;
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80 elseif value == "false" then return false; end
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81 elseif t == "number" then return tonumber(value);
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82 elseif t == "json" then
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83 return json.parse(value);
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84 end
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85 end
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86
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87 local function getsql(sql, ...)
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88 -- do prepared statement stuff
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89 local stmt, err = connection:prepare(sql);
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90 if not stmt then return nil, err; end
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91 -- run query
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92 local ok, err = stmt:execute(host or "", user or "", store or "", ...);
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93 if not ok then return nil, err; end
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94
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95 return stmt;
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96 end
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97 local function setsql(sql, ...)
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98 local stmt, err = getsql(sql, ...);
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99 if not stmt then return stmt, err; end
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100 return stmt:affected();
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101 end
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102 local function transact(...)
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103 -- ...
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104 end
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105 local function rollback(...)
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106 connection:rollback(); -- FIXME check for rollback error?
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107 return ...;
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108 end
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109 local function commit(...)
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110 if not connection:commit() then return nil, "SQL commit failed"; end
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111 return ...;
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112 end
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113
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114 local keyval_store = {};
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115 keyval_store.__index = keyval_store;
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116 function keyval_store:get(username)
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117 user,store = username,self.store;
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118 local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `subkey`=''");
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119 if not stmt then return nil, err; end
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120
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121 local haveany;
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122 local result = {};
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123 for row in stmt:rows(true) do
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124 haveany = true;
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125 local k = row.key;
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126 local v = deserialize(row.type, row.value);
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127 if v then
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128 if k then result[k] = v; elseif type(v) == "table" then
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129 for a,b in pairs(v) do
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130 result[a] = b;
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131 end
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132 end
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133 end
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134 end
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135 return haveany and result or nil;
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136 end
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137 function keyval_store:set(username, data)
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138 user,store = username,self.store;
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139 -- start transaction
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140 local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `subkey`=''");
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141
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142 if data and next(data) ~= nil then
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143 local extradata = {};
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144 for key, value in pairs(data) do
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145 if type(key) == "string" and key ~= "" then
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146 local t, value = serialize(value);
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147 if not t then return rollback(t, value); end
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148 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`,`subkey`) VALUES (?,?,?,?,?,?,'')", key or "", t, value);
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149 if not ok then return rollback(ok, err); end
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150 else
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151 extradata[key] = value;
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152 end
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153 end
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154 if next(extradata) ~= nil then
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155 local t, extradata = serialize(extradata);
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156 if not t then return rollback(t, extradata); end
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157 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`type`,`value`,`subkey`) VALUES (?,?,?,?,?,?,'')", "", t, extradata);
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158 if not ok then return rollback(ok, err); end
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159 end
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160 end
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161 return commit(true);
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162 end
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163
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164 local map_store = {};
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165 map_store.__index = map_store;
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166 function map_store:get(username, key)
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167 user,store = username,self.store;
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168 local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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169 if not stmt then return nil, err; end
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170
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171 local haveany;
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172 local result = {};
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173 for row in stmt:rows(true) do
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174 haveany = true;
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175 local k = row.subkey;
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176 local v = deserialize(row.type, row.value);
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177 if v then
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178 if k then result[k] = v; elseif type(v) == "table" then
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179 for a,b in pairs(v) do
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180 result[a] = b;
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181 end
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182 end
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183 end
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184 end
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185 return haveany and result or nil;
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186 end
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187 function map_store:set(username, key, data)
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188 user,store = username,self.store;
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189 -- start transaction
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190 local affected, err = setsql("DELETE FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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191
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192 if data and next(data) ~= nil then
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193 local extradata = {};
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194 for subkey, value in pairs(data) do
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195 if type(subkey) == "string" and key ~= "" then
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196 local t, value = serialize(value);
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197 if not t then return rollback(t, value); end
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198 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`subkey`,`type`,`value`) VALUES (?,?,?,?,?,?,?)", key or "", subkey or "", t, value);
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199 if not ok then return rollback(ok, err); end
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200 else
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201 extradata[subkey] = value;
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202 end
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203 end
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204 if next(extradata) ~= nil then
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205 local t, extradata = serialize(extradata);
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206 if not t then return rollback(t, extradata); end
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207 local ok, err = setsql("INSERT INTO `Prosody` (`host`,`user`,`store`,`key`,`subkey`,`type`,`value`) VALUES (?,?,?,?,?,?,?)", key or "", "", t, extradata);
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208 if not ok then return rollback(ok, err); end
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209 end
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210 end
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211 return commit(true);
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212 end
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213
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214 local list_store = {};
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215 list_store.__index = list_store;
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216 function list_store:scan(username, from, to, jid, typ)
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diff changeset
217 user,store = username,self.store;
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218
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219 local cols = {"from", "to", "jid", "typ"};
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diff changeset
220 local vals = { from , to , jid , typ };
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diff changeset
221 local stmt, err;
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222 local query = "SELECT * FROM `ProsodyArchive` WHERE `host`=? AND `user`=? AND `store`=?";
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223
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224 query = query.." ORDER BY time";
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225 --local stmt, err = getsql("SELECT * FROM `Prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
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226
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227 return nil, "not-implemented"
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228 end
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229
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230 local driver = { name = "sql" };
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231
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232 function driver:open(store, typ)
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233 if not typ then -- default key-value store
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diff changeset
234 return setmetatable({ store = store }, keyval_store);
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235 end
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236 return nil, "unsupported-store";
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237 end
e979b5fe859d mod_storage_sql: Initial commit of new SQL data driver.
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238
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239 module:add_item("data-driver", driver);