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24f4e73645fe
plugins/mod_storage_sql2.lua

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plugins/mod_storage_sql2.lua @ 5735:24f4e73645fe

mod_storage_sql2: Support XML serialization for stanzas.
author Kim Alvefur <zash@zash.se>
date Wed, 10 Jul 2013 13:19:33 +0200
parent 5734:49f1fed6e25e
child 5740:6fce00f61acf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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5494
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1
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2 local json = require "util.json";
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3 local xml_parse = require "util.xml".parse;
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4 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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5
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6 local stanza_mt = require"util.stanza".stanza_mt;
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7 local getmetatable = getmetatable;
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8 local function is_stanza(x) return getmetatable(x) == stanza_mt; end
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9
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10 local unpack = unpack
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11 local function iterator(result)
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12 return function(result)
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13 local row = result();
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14 if row ~= nil then
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15 return unpack(row);
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16 end
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17 end, result, nil;
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18 end
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19
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20 local mod_sql = module:require("sql");
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21 local params = module:get_option("sql");
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23 local engine; -- TODO create engine
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25 local function create_table()
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26 --[[local Table,Column,Index = mod_sql.Table,mod_sql.Column,mod_sql.Index;
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27 local ProsodyTable = Table {
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28 name="prosody";
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29 Column { name="host", type="TEXT", nullable=false };
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30 Column { name="user", type="TEXT", nullable=false };
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31 Column { name="store", type="TEXT", nullable=false };
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32 Column { name="key", type="TEXT", nullable=false };
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33 Column { name="type", type="TEXT", nullable=false };
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34 Column { name="value", type="TEXT", nullable=false };
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35 Index { name="prosody_index", "host", "user", "store", "key" };
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36 };
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37 engine:transaction(function()
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38 ProsodyTable:create(engine);
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39 end);]]
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40 if not module:get_option("sql_manage_tables", true) then
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41 return;
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42 end
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43
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44 local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
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45 if params.driver == "PostgreSQL" then
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46 create_sql = create_sql:gsub("`", "\"");
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47 elseif params.driver == "MySQL" then
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48 create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT")
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49 :gsub(";$", " CHARACTER SET 'utf8' COLLATE 'utf8_bin';");
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50 end
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51
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52 local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
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53 if params.driver == "PostgreSQL" then
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54 index_sql = index_sql:gsub("`", "\"");
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55 elseif params.driver == "MySQL" then
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56 index_sql = index_sql:gsub("`([,)])", "`(20)%1");
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57 end
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58
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59 local success,err = engine:transaction(function()
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60 engine:execute(create_sql);
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61 engine:execute(index_sql);
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62 end);
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63 if not success then -- so we failed to create
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64 if params.driver == "MySQL" then
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65 success,err = engine:transaction(function()
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66 local result = engine:execute("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
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67 if result:rowcount() > 0 then
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68 module:log("info", "Upgrading database schema...");
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69 engine:execute("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
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70 module:log("info", "Database table automatically upgraded");
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71 end
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72 return true;
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73 end);
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74 if not success then
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75 module:log("error", "Failed to check/upgrade database schema (%s), please see "
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76 .."http://prosody.im/doc/mysql for help",
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77 err or "unknown error");
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78 end
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79 end
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80 end
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81 end
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82 local function set_encoding()
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83 if params.driver ~= "SQLite3" then
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84 local set_names_query = "SET NAMES 'utf8';";
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85 if params.driver == "MySQL" then
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86 set_names_query = set_names_query:gsub(";$", " COLLATE 'utf8_bin';");
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87 end
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88 local success,err = engine:transaction(function() return engine:execute(set_names_query); end);
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89 if not success then
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90 module:log("error", "Failed to set database connection encoding to UTF8: %s", err);
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91 return;
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92 end
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93 if params.driver == "MySQL" then
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94 -- COMPAT w/pre-0.9: Upgrade tables to UTF-8 if not already
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95 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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96 local success,err = engine:transaction(function()
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97 local result = engine:execute(check_encoding_query);
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98 local n_bad_columns = result:rowcount();
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99 if n_bad_columns > 0 then
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100 module:log("warn", "Found %d columns in prosody table requiring encoding change, updating now...", n_bad_columns);
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101 local fix_column_query1 = "ALTER TABLE `prosody` CHANGE `%s` `%s` BLOB;";
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102 local fix_column_query2 = "ALTER TABLE `prosody` CHANGE `%s` `%s` %s CHARACTER SET 'utf8' COLLATE 'utf8_bin';";
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103 for row in result:rows() do
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104 local column_name, column_type = unpack(row);
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105 engine:execute(fix_column_query1:format(column_name, column_name));
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106 engine:execute(fix_column_query2:format(column_name, column_name, column_type));
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107 end
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108 module:log("info", "Database encoding upgrade complete!");
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109 end
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110 end);
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111 local success,err = engine:transaction(function() return engine:execute(check_encoding_query); end);
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112 if not success then
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113 module:log("error", "Failed to check/upgrade database encoding: %s", err or "unknown error");
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114 end
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115 end
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116 end
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117 end
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118
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119 do -- process options to get a db connection
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120 params = params or { driver = "SQLite3" };
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121
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122 if params.driver == "SQLite3" then
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123 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
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124 end
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125
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126 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
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127
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128 --local dburi = db2uri(params);
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129 engine = mod_sql:create_engine(params);
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130
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131 -- Encoding mess
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132 set_encoding();
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133
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134 -- Automatically create table, ignore failure (table probably already exists)
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135 create_table();
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136 end
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137
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138 local function serialize(value)
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139 local t = type(value);
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140 if t == "string" or t == "boolean" or t == "number" then
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141 return t, tostring(value);
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142 elseif is_stanza(value) then
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143 return "xml", tostring(value);
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144 elseif t == "table" then
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145 local value,err = json.encode(value);
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146 if value then return "json", value; end
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147 return nil, err;
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148 end
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149 return nil, "Unhandled value type: "..t;
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150 end
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151 local function deserialize(t, value)
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152 if t == "string" then return value;
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153 elseif t == "boolean" then
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154 if value == "true" then return true;
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155 elseif value == "false" then return false; end
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156 elseif t == "number" then return tonumber(value);
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157 elseif t == "json" then
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158 return json.decode(value);
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159 elseif t == "xml" then
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160 return xml_parse(value);
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161 end
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162 end
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163
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164 local host = module.host;
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165 local user, store;
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166
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167 local function keyval_store_get()
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168 local haveany;
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169 local result = {};
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170 for row in engine:select("SELECT `key`,`type`,`value` FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store) do
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171 haveany = true;
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172 local k = row[1];
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173 local v = deserialize(row[2], row[3]);
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174 if k and v then
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175 if k ~= "" then result[k] = v; elseif type(v) == "table" then
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176 for a,b in pairs(v) do
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177 result[a] = b;
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178 end
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179 end
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180 end
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181 end
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182 if haveany then
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183 return result;
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184 end
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185 end
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186 local function keyval_store_set(data)
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187 engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?", host, user or "", store);
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188
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189 if data and next(data) ~= nil then
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190 local extradata = {};
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191 for key, value in pairs(data) do
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192 if type(key) == "string" and key ~= "" then
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193 local t, value = serialize(value);
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194 assert(t, value);
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195 engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, key, t, value);
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196 else
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197 extradata[key] = value;
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198 end
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199 end
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200 if next(extradata) ~= nil then
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201 local t, extradata = serialize(extradata);
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202 assert(t, extradata);
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203 engine:insert("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", host, user or "", store, "", t, extradata);
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204 end
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205 end
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206 return true;
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207 end
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208
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209 local keyval_store = {};
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210 keyval_store.__index = keyval_store;
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211 function keyval_store:get(username)
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212 user,store = username,self.store;
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213 return select(2, engine:transaction(keyval_store_get));
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214 end
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215 function keyval_store:set(username, data)
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216 user,store = username,self.store;
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217 return engine:transaction(function()
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218 return keyval_store_set(data);
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219 end);
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220 end
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221 function keyval_store:users()
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222 local ok, result = engine:transaction(function()
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223 return engine:select("SELECT DISTINCT `user` FROM `prosody` WHERE `host`=? AND `store`=?", host, self.store);
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224 end);
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225 if not ok then return ok, result end
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226 return iterator(result);
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227 end
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228
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229 local stores = {
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230 keyval = keyval_store;
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231 };
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232
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233 local driver = {};
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234
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235 function driver:open(store, typ)
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236 local store_mt = stores[typ or "keyval"];
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237 if store_mt then
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238 return setmetatable({ store = store }, store_mt);
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239 end
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240 return nil, "unsupported-store";
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241 end
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242
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243 function driver:stores(username)
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244 local sql = "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`" ..
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245 (username == true and "!=?" or "=?");
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246 if username == true or not username then
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247 username = "";
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248 end
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249 local ok, result = engine:transaction(function()
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250 return engine:select(sql, host, username);
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251 end);
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252 if not ok then return ok, result end
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253 return iterator(result);
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254 end
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255
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256 function driver:purge(username)
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257 return engine:transaction(function()
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258 local stmt,err = engine:delete("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
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259 return true,err;
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260 end);
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261 end
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262
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263 module:provides("storage", driver);
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264
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265