prosody
b41c33dc7c36
plugins/mod_storage_sql.lua

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plugins/mod_storage_sql.lua @ 5122:b41c33dc7c36

mod_storage_*: Don't explicitly set driver name, to ease copying/renaming modules.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 12 Sep 2012 23:46:10 +0500
parent 5121:b5a5643f8572
child 5133:1443d1c37c6c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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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 | 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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30 local build_url = require"socket.url".build;
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31
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32 local DBI;
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33 local connection;
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34 local host,user,store = module.host;
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35 local params = module:get_option("sql");
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36
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37 local dburi;
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38 local connections = module:shared "/*/sql/connection-cache";
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39
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40 local function db2uri(params)
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41 return build_url{
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42 scheme = params.driver,
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43 user = params.username,
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44 password = params.password,
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45 host = params.host,
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46 port = params.port,
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47 path = params.database,
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48 };
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49 end
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50
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51
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52 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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53
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54 local function test_connection()
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55 if not connection then return nil; end
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56 if connection:ping() then
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57 return true;
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58 else
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59 module:log("debug", "Database connection closed");
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60 connection = nil;
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61 connections[dburi] = nil;
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62 end
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63 end
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64 local function connect()
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65 if not test_connection() then
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66 prosody.unlock_globals();
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67 local dbh, err = DBI.Connect(
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68 params.driver, params.database,
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69 params.username, params.password,
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70 params.host, params.port
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71 );
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72 prosody.lock_globals();
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73 if not dbh then
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74 module:log("debug", "Database connection failed: %s", tostring(err));
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75 return nil, err;
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76 end
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77 module:log("debug", "Successfully connected to database");
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78 dbh:autocommit(false); -- don't commit automatically
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79 connection = dbh;
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80
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81 connections[dburi] = dbh;
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82 end
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83 return connection;
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84 end
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85
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86 local function create_table()
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87 if not module:get_option("sql_manage_tables", true) then
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88 return;
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89 end
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90 local create_sql = "CREATE TABLE `prosody` (`host` TEXT, `user` TEXT, `store` TEXT, `key` TEXT, `type` TEXT, `value` TEXT);";
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91 if params.driver == "PostgreSQL" then
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92 create_sql = create_sql:gsub("`", "\"");
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93 elseif params.driver == "MySQL" then
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94 create_sql = create_sql:gsub("`value` TEXT", "`value` MEDIUMTEXT");
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95 end
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96
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97 local stmt, err = connection:prepare(create_sql);
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98 if stmt then
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99 local ok = stmt:execute();
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100 local commit_ok = connection:commit();
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101 if ok and commit_ok then
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102 module:log("info", "Initialized new %s database with prosody table", params.driver);
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103 local index_sql = "CREATE INDEX `prosody_index` ON `prosody` (`host`, `user`, `store`, `key`)";
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104 if params.driver == "PostgreSQL" then
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105 index_sql = index_sql:gsub("`", "\"");
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106 elseif params.driver == "MySQL" then
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107 index_sql = index_sql:gsub("`([,)])", "`(20)%1");
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108 end
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109 local stmt, err = connection:prepare(index_sql);
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110 local ok, commit_ok, commit_err;
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111 if stmt then
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112 ok, err = stmt:execute();
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113 commit_ok, commit_err = connection:commit();
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114 end
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115 if not(ok and commit_ok) then
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116 module:log("warn", "Failed to create index (%s), lookups may not be optimised", err or commit_err);
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117 end
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118 elseif params.driver == "MySQL" then -- COMPAT: Upgrade tables from 0.8.0
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119 -- Failed to create, but check existing MySQL table here
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120 local stmt = connection:prepare("SHOW COLUMNS FROM prosody WHERE Field='value' and Type='text'");
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121 local ok = stmt:execute();
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122 local commit_ok = connection:commit();
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123 if ok and commit_ok then
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parents: 4218
diff changeset
124 if stmt:rowcount() > 0 then
4318
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
125 module:log("info", "Upgrading database schema...");
4285
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
126 local stmt = connection:prepare("ALTER TABLE prosody MODIFY COLUMN `value` MEDIUMTEXT");
4318
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
127 local ok, err = stmt:execute();
4285
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
128 local commit_ok = connection:commit();
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
129 if ok and commit_ok then
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
130 module:log("info", "Database table automatically upgraded");
4318
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
131 else
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
132 module:log("error", "Failed to upgrade database schema (%s), please see "
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
133 .."http://prosody.im/doc/mysql for help",
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
134 err or "unknown error");
4285
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
135 end
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
136 end
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
137 repeat until not stmt:fetch();
c806a599224a mod_storage_sql: Switch to MEDIUMTEXT for the 'value' column when using MySQL, as it imposes a 64K limit otherwise, potentially truncating data. Automatically upgrades existing tables.
Matthew Wild <mwild1@gmail.com>
parents: 4218
diff changeset
138 end
4109
d26db1f936f8 mod_storage_sql: Create index when creating a new table
Matthew Wild <mwild1@gmail.com>
parents: 4105
diff changeset
139 end
4318
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
140 elseif params.driver ~= "SQLite3" then -- SQLite normally fails to prepare for existing table
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
141 module:log("warn", "Prosody was not able to automatically check/create the database table (%s), "
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
142 .."see http://prosody.im/doc/modules/mod_storage_sql#table_management for help.",
44b131d7041b mod_storage_sql: Add extra logging and error handling around table creation
Matthew Wild <mwild1@gmail.com>
parents: 4317
diff changeset
143 err or "unknown error");
4109
d26db1f936f8 mod_storage_sql: Create index when creating a new table
Matthew Wild <mwild1@gmail.com>
parents: 4105
diff changeset
144 end
d26db1f936f8 mod_storage_sql: Create index when creating a new table
Matthew Wild <mwild1@gmail.com>
parents: 4105
diff changeset
145 end
d26db1f936f8 mod_storage_sql: Create index when creating a new table
Matthew Wild <mwild1@gmail.com>
parents: 4105
diff changeset
146
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
147 do -- process options to get a db connection
4218
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
148 local ok;
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
149 prosody.unlock_globals();
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
150 ok, DBI = pcall(require, "DBI");
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
151 if not ok then
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
152 package.loaded["DBI"] = {};
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
153 module:log("error", "Failed to load the LuaDBI library for accessing SQL databases: %s", DBI);
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
154 module:log("error", "More information on installing LuaDBI can be found at http://prosody.im/doc/depends#luadbi");
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
155 end
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
156 prosody.lock_globals();
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
157 if not ok or not DBI.Connect then
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
158 return; -- Halt loading of this module
8a271b3fcaa7 mod_storage_sql: Display friendlier error when LuaDBI is missing
Matthew Wild <mwild1@gmail.com>
parents: 4109
diff changeset
159 end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
160
4096
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
161 params = params or { driver = "SQLite3" };
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
162
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
163 if params.driver == "SQLite3" then
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
164 params.database = resolve_relative_path(prosody.paths.data or ".", params.database or "prosody.sqlite");
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
165 end
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
166
3b991ceb228e mod_storage_sql: Make the 'database' value for the SQLite3 driver relative to the data path
Matthew Wild <mwild1@gmail.com>
parents: 4007
diff changeset
167 assert(params.driver and params.database, "Both the SQL driver and the database need to be specified");
5054
97385c45e670 mod_storage_sql: Keep connections in a shared cache table
Kim Alvefur <zash@zash.se>
parents: 5040
diff changeset
168
97385c45e670 mod_storage_sql: Keep connections in a shared cache table
Kim Alvefur <zash@zash.se>
parents: 5040
diff changeset
169 dburi = db2uri(params);
97385c45e670 mod_storage_sql: Keep connections in a shared cache table
Kim Alvefur <zash@zash.se>
parents: 5040
diff changeset
170 connection = connections[dburi];
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
171
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
172 assert(connect());
3732
bf449ecf2144 mod_storage_sql: Auto-initialize SQLite3 database.
Waqas Hussain <waqas20@gmail.com>
parents: 3731
diff changeset
173
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
174 -- Automatically create table, ignore failure (table probably already exists)
4109
d26db1f936f8 mod_storage_sql: Create index when creating a new table
Matthew Wild <mwild1@gmail.com>
parents: 4105
diff changeset
175 create_table();
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
176 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
177
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
178 local function serialize(value)
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
179 local t = type(value);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
180 if t == "string" or t == "boolean" or t == "number" then
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
181 return t, tostring(value);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
182 elseif t == "table" then
3980
6b2fac6602b3 mod_storage_sql: Use util.json instead of util.serialization.
Waqas Hussain <waqas20@gmail.com>
parents: 3978
diff changeset
183 local value,err = json.encode(value);
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
184 if value then return "json", value; end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
185 return nil, err;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
186 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
187 return nil, "Unhandled value type: "..t;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
188 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
189 local function deserialize(t, value)
3743
5adfb8d0444d mod_storage_sql: Fixed the deserialization of string-typed values.
Waqas Hussain <waqas20@gmail.com>
parents: 3732
diff changeset
190 if t == "string" then return value;
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
191 elseif t == "boolean" then
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
192 if value == "true" then return true;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
193 elseif value == "false" then return false; end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
194 elseif t == "number" then return tonumber(value);
3772
e1f6fe098404 mod_storage_sql: Fix a couple of bugs in "JSON" decoding
Matthew Wild <mwild1@gmail.com>
parents: 3744
diff changeset
195 elseif t == "json" then
3980
6b2fac6602b3 mod_storage_sql: Use util.json instead of util.serialization.
Waqas Hussain <waqas20@gmail.com>
parents: 3978
diff changeset
196 return json.decode(value);
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
197 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
198 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
199
5034
2dbb3bf74090 mod_storage_sql: Split out query handling logic from getsql() into a separate function
Kim Alvefur <zash@zash.se>
parents: 4318
diff changeset
200 local function dosql(sql, ...)
3976
16170a66e140 mod_storage_sql: Dynamically replace backquotes with double quotes when connecting to PostgreSQL...
Waqas Hussain <waqas20@gmail.com>
parents: 3975
diff changeset
201 if params.driver == "PostgreSQL" then
16170a66e140 mod_storage_sql: Dynamically replace backquotes with double quotes when connecting to PostgreSQL...
Waqas Hussain <waqas20@gmail.com>
parents: 3975
diff changeset
202 sql = sql:gsub("`", "\"");
16170a66e140 mod_storage_sql: Dynamically replace backquotes with double quotes when connecting to PostgreSQL...
Waqas Hussain <waqas20@gmail.com>
parents: 3975
diff changeset
203 end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
204 -- do prepared statement stuff
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
205 local stmt, err = connection:prepare(sql);
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
206 if not stmt and not test_connection() then error("connection failed"); end
3978
13ee740b1f89 mod_storage_sql: Log an error on query failure.
Waqas Hussain <waqas20@gmail.com>
parents: 3977
diff changeset
207 if not stmt then module:log("error", "QUERY FAILED: %s %s", err, debug.traceback()); return nil, err; end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
208 -- run query
5034
2dbb3bf74090 mod_storage_sql: Split out query handling logic from getsql() into a separate function
Kim Alvefur <zash@zash.se>
parents: 4318
diff changeset
209 local ok, err = stmt:execute(...);
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
210 if not ok and not test_connection() then error("connection failed"); end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
211 if not ok then return nil, err; end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
212
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
213 return stmt;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
214 end
5034
2dbb3bf74090 mod_storage_sql: Split out query handling logic from getsql() into a separate function
Kim Alvefur <zash@zash.se>
parents: 4318
diff changeset
215 local function getsql(sql, ...)
2dbb3bf74090 mod_storage_sql: Split out query handling logic from getsql() into a separate function
Kim Alvefur <zash@zash.se>
parents: 4318
diff changeset
216 return dosql(sql, host or "", user or "", store or "", ...);
2dbb3bf74090 mod_storage_sql: Split out query handling logic from getsql() into a separate function
Kim Alvefur <zash@zash.se>
parents: 4318
diff changeset
217 end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
218 local function setsql(sql, ...)
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
219 local stmt, err = getsql(sql, ...);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
220 if not stmt then return stmt, err; end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
221 return stmt:affected();
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
222 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
223 local function transact(...)
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
224 -- ...
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
225 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
226 local function rollback(...)
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
227 if connection then connection:rollback(); end -- FIXME check for rollback error?
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
228 return ...;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
229 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
230 local function commit(...)
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
231 if not connection:commit() then return nil, "SQL commit failed"; end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
232 return ...;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
233 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
234
4007
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
235 local function keyval_store_get()
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
236 local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
237 if not stmt then return rollback(nil, err); end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
238
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
239 local haveany;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
240 local result = {};
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
241 for row in stmt:rows(true) do
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
242 haveany = true;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
243 local k = row.key;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
244 local v = deserialize(row.type, row.value);
3977
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
245 if k and v then
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
246 if k ~= "" then result[k] = v; elseif type(v) == "table" then
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
247 for a,b in pairs(v) do
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
248 result[a] = b;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
249 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
250 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
251 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
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252 end
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aa5e93e61760 mod_storage_sql: Call commit() after all SQL statements, including SELECT, to get SQLite to drop its locks.
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diff changeset
253 return commit(haveany and result or nil);
3729
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254 end
4007
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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diff changeset
255 local function keyval_store_set(data)
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diff changeset
256 local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=?");
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diff changeset
257 if not affected then return rollback(affected, err); end
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258
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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diff changeset
259 if data and next(data) ~= nil then
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diff changeset
260 local extradata = {};
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
261 for key, value in pairs(data) do
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parents: 3772
diff changeset
262 if type(key) == "string" and key ~= "" then
3729
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parents:
diff changeset
263 local t, value = serialize(value);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
264 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
265 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
3729
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parents:
diff changeset
266 if not ok then return rollback(ok, err); end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
267 else
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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diff changeset
268 extradata[key] = value;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
269 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
270 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
271 if next(extradata) ~= nil then
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diff changeset
272 local t, extradata = serialize(extradata);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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273 if not t then return rollback(t, extradata); end
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parents: 4096
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274 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", "", t, extradata);
3729
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275 if not ok then return rollback(ok, err); end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
276 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
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277 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
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278 return commit(true);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
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279 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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280
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281 local keyval_store = {};
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282 keyval_store.__index = keyval_store;
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parents: 4004
diff changeset
283 function keyval_store:get(username)
3729
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284 user,store = username,self.store;
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diff changeset
285 if not connection and not connect() then return nil, "Unable to connect to database"; end
4007
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parents: 4004
diff changeset
286 local success, ret, err = xpcall(keyval_store_get, debug.traceback);
4105
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diff changeset
287 if not connection and connect() then
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parents: 4101
diff changeset
288 success, ret, err = xpcall(keyval_store_get, debug.traceback);
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
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parents: 4101
diff changeset
289 end
4007
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parents: 4004
diff changeset
290 if success then return ret, err; else return rollback(nil, ret); end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
291 end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
292 function keyval_store:set(username, data)
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parents: 4004
diff changeset
293 user,store = username,self.store;
4105
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parents: 4101
diff changeset
294 if not connection and not connect() then return nil, "Unable to connect to database"; end
4007
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parents: 4004
diff changeset
295 local success, ret, err = xpcall(function() return keyval_store_set(data); end, debug.traceback);
4105
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parents: 4101
diff changeset
296 if not connection and connect() then
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parents: 4101
diff changeset
297 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.
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parents: 4101
diff changeset
298 end
4007
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
299 if success then return ret, err; else return rollback(nil, ret); end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
300 end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
301
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
302 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.
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parents: 4096
diff changeset
303 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
304 if not stmt then return rollback(nil, err); end
3729
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parents:
diff changeset
305
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
306 local haveany;
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parents:
diff changeset
307 local result = {};
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
308 for row in stmt:rows(true) do
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
309 haveany = true;
3977
6724853adb80 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: 3976
diff changeset
310 local k = row.key;
3729
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parents:
diff changeset
311 local v = deserialize(row.type, row.value);
3977
6724853adb80 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: 3976
diff changeset
312 if k and v then
6724853adb80 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: 3976
diff changeset
313 if k ~= "" then result[k] = v; elseif type(v) == "table" then
3729
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parents:
diff changeset
314 for a,b in pairs(v) do
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
315 result[a] = b;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
316 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
317 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
318 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
319 end
3977
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
320 return commit(haveany and result[key] or nil);
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
321 end
4007
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
322 local function map_store_set(key, data)
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
323 local affected, err = setsql("DELETE FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
4105
08560575762f mod_storage_sql: Reconnect in all cases, and rollback on error.
Waqas Hussain <waqas20@gmail.com>
parents: 4101
diff changeset
324 if not affected then return rollback(affected, err); end
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
325
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
326 if data and next(data) ~= nil then
3977
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
327 if type(key) == "string" and key ~= "" then
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
328 local t, value = serialize(data);
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
329 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
330 local ok, err = setsql("INSERT INTO `prosody` (`host`,`user`,`store`,`key`,`type`,`value`) VALUES (?,?,?,?,?,?)", key, t, value);
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
331 if not ok then return rollback(ok, err); end
3977
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
332 else
6724853adb80 mod_storage_sql: Remove the subkey column from the Prosody table, and make the map store compatible with the key-value store.
Waqas Hussain <waqas20@gmail.com>
parents: 3976
diff changeset
333 -- TODO non-string keys
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
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parents:
diff changeset
334 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
335 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
336 return commit(true);
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
337 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
338
4007
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
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parents: 4004
diff changeset
339 local map_store = {};
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
340 map_store.__index = map_store;
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
341 function map_store:get(username, key)
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
342 user,store = username,self.store;
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
343 local success, ret, err = xpcall(function() return map_store_get(key); end, debug.traceback);
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
344 if success then return ret, err; else return rollback(nil, ret); end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
345 end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
346 function map_store:set(username, key, data)
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
347 user,store = username,self.store;
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
348 local success, ret, err = xpcall(function() return map_store_set(key, data); end, debug.traceback);
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
349 if success then return ret, err; else return rollback(nil, ret); end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
350 end
062b849ca088 mod_storage_sql: Catch Lua errors during SQL transactions, and rollback.
Waqas Hussain <waqas20@gmail.com>
parents: 4004
diff changeset
351
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
352 local list_store = {};
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
353 list_store.__index = list_store;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
354 function list_store:scan(username, from, to, jid, typ)
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
355 user,store = username,self.store;
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
356
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
357 local cols = {"from", "to", "jid", "typ"};
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
358 local vals = { from , to , jid , typ };
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
359 local stmt, err;
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
360 local query = "SELECT * FROM `prosodyarchive` WHERE `host`=? AND `user`=? AND `store`=?";
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
361
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
362 query = query.." ORDER BY time";
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
363 --local stmt, err = getsql("SELECT * FROM `prosody` WHERE `host`=? AND `user`=? AND `store`=? AND `key`=?", key or "");
3729
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
364
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
365 return nil, "not-implemented"
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
366 end
b351fa47a743 mod_storage_sql: Initial commit of new SQL data driver.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
367
5122
b41c33dc7c36 mod_storage_*: Don't explicitly set driver name, to ease copying/renaming modules.
Waqas Hussain <waqas20@gmail.com>
parents: 5121
diff changeset
368 local driver = {};
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369
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370 function driver:open(store, typ)
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371 if not typ then -- default key-value store
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372 return setmetatable({ store = store }, keyval_store);
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373 end
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374 return nil, "unsupported-store";
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375 end
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376
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377 function driver:list_stores(username) -- Not to be confused with the list store type
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378 local sql = (username == true
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379 and "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`!=?"
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380 or "SELECT DISTINCT `store` FROM `prosody` WHERE `host`=? AND `user`=?");
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381 if username == true or not username then
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382 username = "";
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383 end
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384 local stmt, err = dosql(sql, host, username);
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385 if not stmt then
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386 return rollback(nil, err);
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387 end
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388 local stores = {};
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389 for row in stmt:rows() do
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390 stores[#stores+1] = row[1];
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391 end
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392 return commit(stores);
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393 end
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394
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395 function driver:purge(username)
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396 local stmt, err = dosql("DELETE FROM `prosody` WHERE `host`=? AND `user`=?", host, username);
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397 if not stmt then return rollback(stmt, err); end
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398 local changed, err = stmt:affected();
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399 if not changed then return rollback(changed, err); end
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400 return commit(true, changed);
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401 end
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402
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403 module:provides("storage", driver);