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49f1fed6e25e
plugins/mod_storage_sql2.lua

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plugins/mod_storage_sql2.lua @ 5734:49f1fed6e25e

mod_storage_sql2: Keep available store types in a table
author Kim Alvefur <zash@zash.se>
date Wed, 10 Jul 2013 13:18:10 +0200
parent 5733:aeeced7b0149
child 5735:24f4e73645fe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 local json = require "util.json";
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3 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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4
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5 local unpack = unpack
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6 local function iterator(result)
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7 return function(result)
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8 local row = result();
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9 if row ~= nil then
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10 return unpack(row);
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11 end
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12 end, result, nil;
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13 end
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14
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15 local mod_sql = module:require("sql");
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16 local params = module:get_option("sql");
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18 local engine; -- TODO create engine
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20 local function create_table()
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21 --[[local Table,Column,Index = mod_sql.Table,mod_sql.Column,mod_sql.Index;
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22 local ProsodyTable = Table {
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23 name="prosody";
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24 Column { name="host", type="TEXT", nullable=false };
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25 Column { name="user", type="TEXT", nullable=false };
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26 Column { name="store", type="TEXT", nullable=false };
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27 Column { name="key", type="TEXT", nullable=false };
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28 Column { name="type", type="TEXT", nullable=false };
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29 Column { name="value", type="TEXT", nullable=false };
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30 Index { name="prosody_index", "host", "user", "store", "key" };
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31 };
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32 engine:transaction(function()
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33 ProsodyTable:create(engine);
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34 end);]]
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35 if not module:get_option("sql_manage_tables", true) then
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36 return;
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37 end
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39 local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
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40 if params.driver == "PostgreSQL" then
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41 create_sql = create_sql:gsub("`", "\"");
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42 elseif params.driver == "MySQL" then
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43 create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT")
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44 :gsub(";$", " CHARACTER SET 'utf8' COLLATE 'utf8_bin';");
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45 end
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46
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47 local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
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48 if params.driver == "PostgreSQL" then
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49 index_sql = index_sql:gsub("`", "\"");
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50 elseif params.driver == "MySQL" then
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51 index_sql = index_sql:gsub("`([,)])", "`(20)%1");
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52 end
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53
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54 local success,err = engine:transaction(function()
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55 engine:execute(create_sql);
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56 engine:execute(index_sql);
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57 end);
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58 if not success then -- so we failed to create
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59 if params.driver == "MySQL" then
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60 success,err = engine:transaction(function()
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61 local result = engine:execute("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
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62 if result:rowcount() > 0 then
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63 module:log("info", "Upgrading database schema...");
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64 engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
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65 module:log("info", "Database table automatically upgraded");
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66 end
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67 return true;
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68 end);
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69 if not success then
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70 module:log("error", "Failed to check/upgrade database schema (%s), please see "
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71 .."http://prosody.im/doc/mysql for help",
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72 err or "unknown error");
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73 end
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74 end
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75 end
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76 end
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77 local function set_encoding()
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78 if params.driver ~= "SQLite3" then
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79 local set_names_query = "SET NAMES 'utf8';";
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80 if params.driver == "MySQL" then
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81 set_names_query = set_names_query:gsub(";$", " COLLATE 'utf8_bin';");
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82 end
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83 local success,err = engine:transaction(function() return engine:execute(set_names_query); end);
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84 if not success then
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85 module:log("error", "Failed to set database connection encoding to UTF8: %s", err);
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86 return;
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87 end
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88 if params.driver == "MySQL" then
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89 -- COMPAT w/pre-0.9: Upgrade tables to UTF-8 if not already
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90 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' );";
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91 local success,err = engine:transaction(function()
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92 local result = engine:execute(check_encoding_query);
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93 local n_bad_columns = result:rowcount();
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94 if n_bad_columns > 0 then
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95 module:log("warn", "Found %d columns in prosody table requiring encoding change, updating now...", n_bad_columns);
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96 local fix_column_query1 = "ALTER TABLE `prosody` CHANGE `%s` `%s` BLOB;";
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97 local fix_column_query2 = "ALTER TABLE `prosody` CHANGE `%s` `%s` %s CHARACTER SET 'utf8' COLLATE 'utf8_bin';";
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98 for row in result:rows() do
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99 local column_name, column_type = unpack(row);
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100 engine:execute(fix_column_query1:format(column_name, column_name));
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101 engine:execute(fix_column_query2:format(column_name, column_name, column_type));
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102 end
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103 module:log("info", "Database encoding upgrade complete!");
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104 end
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105 end);
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106 local success,err = engine:transaction(function() return engine:execute(check_encoding_query); end);
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107 if not success then
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108 module:log("error", "Failed to check/upgrade database encoding: %s", err or "unknown error");
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109 end
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110 end
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111 end
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112 end
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113
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114 do -- process options to get a db connection
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115 params = params or { driver = "SQLite3" };
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116
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117 if params.driver == "SQLite3" then
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118 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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119 end
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120
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121 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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122
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123 --local dburi = db2uri(params);
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124 engine = mod_sql:create_engine(params);
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125
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126 -- Encoding mess
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127 set_encoding();
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128
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129 -- Automatically create table, ignore failure (table probably already exists)
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130 create_table();
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131 end
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132
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133 local function serialize(value)
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134 local t = type(value);
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135 if t == "string" or t == "boolean" or t == "number" then
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136 return t, tostring(value);
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137 elseif t == "table" then
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138 local value,err = json.encode(value);
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139 if value then return "json", value; end
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140 return nil, err;
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141 end
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142 return nil, "Unhandled value type: "..t;
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143 end
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144 local function deserialize(t, value)
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145 if t == "string" then return value;
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146 elseif t == "boolean" then
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147 if value == "true" then return true;
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148 elseif value == "false" then return false; end
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149 elseif t == "number" then return tonumber(value);
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150 elseif t == "json" then
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151 return json.decode(value);
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152 end
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153 end
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154
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diff changeset
155 local host = module.host;
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156 local user, store;
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157
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158 local function keyval_store_get()
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159 local haveany;
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160 local result = {};
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161 for row in engine:select("SELECT `key`,`type`,`value` FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store) do
5494
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162 haveany = true;
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163 local k = row[1];
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164 local v = deserialize(row[2], row[3]);
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165 if k and v then
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diff changeset
166 if k ~= "" then result[k] = v; elseif type(v) == "table" then
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diff changeset
167 for a,b in pairs(v) do
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diff changeset
168 result[a] = b;
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169 end
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170 end
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171 end
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172 end
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diff changeset
173 if haveany then
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diff changeset
174 return result;
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175 end
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176 end
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177 local function keyval_store_set(data)
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diff changeset
178 engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store);
5494
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diff changeset
179
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diff changeset
180 if data and next(data) ~= nil then
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diff changeset
181 local extradata = {};
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diff changeset
182 for key, value in pairs(data) do
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183 if type(key) == "string" and key ~= "" then
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184 local t, value = serialize(value);
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diff changeset
185 assert(t, value);
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diff changeset
186 engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, key, t, value);
5494
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187 else
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diff changeset
188 extradata[key] = value;
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189 end
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190 end
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191 if next(extradata) ~= nil then
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192 local t, extradata = serialize(extradata);
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193 assert(t, extradata);
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194 engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, "", t, extradata);
5494
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195 end
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196 end
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197 return true;
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198 end
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diff changeset
199
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200 local keyval_store = {};
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201 keyval_store.__index = keyval_store;
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202 function keyval_store:get(username)
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203 user,store = username,self.store;
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204 return select(2, engine:transaction(keyval_store_get));
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205 end
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206 function keyval_store:set(username, data)
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207 user,store = username,self.store;
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208 return engine:transaction(function()
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209 return keyval_store_set(data);
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210 end);
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211 end
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212 function keyval_store:users()
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213 local ok, result = engine:transaction(function()
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214 return engine:select("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
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215 end);
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216 if not ok then return ok, result end
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217 return iterator(result);
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218 end
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219
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220 local stores = {
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221 keyval = keyval_store;
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222 };
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223
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224 local driver = {};
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225
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226 function driver:open(store, typ)
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227 local store_mt = stores[typ or "keyval"];
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228 if store_mt then
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229 return setmetatable({ store = store }, store_mt);
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230 end
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231 return nil, "unsupported-store";
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232 end
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233
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234 function driver:stores(username)
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235 local sql = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
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236 (username == true and "!=?" or "=?");
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237 if username == true or not username then
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238 username = "";
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239 end
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240 local ok, result = engine:transaction(function()
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241 return engine:select(sql, host, username);
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242 end);
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243 if not ok then return ok, result end
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244 return iterator(result);
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245 end
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246
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247 function driver:purge(username)
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248 return engine:transaction(function()
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249 local stmt,err = engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
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250 return true,err;
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251 end);
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252 end
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253
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254 module:provides("storage", driver);
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255
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256