prosody
07e8256efcda
util/datamanager.lua

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util/datamanager.lua @ 5243:07e8256efcda

util.datamanager: Remove dead code path
author Kim Alvefur <zash@zash.se>
date Fri, 14 Dec 2012 14:21:32 +0100
parent 5153:688aeac0012a
child 5244:775d98184acf
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
758
b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10 local format = string.format;
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11 local setmetatable = setmetatable;
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12 local ipairs = ipairs;
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13 local char = string.char;
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14 local pcall = pcall;
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15 local log = require "util.logger".init("datamanager");
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16 local io_open = io.open;
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17 local os_remove = os.remove;
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18 local os_rename = os.rename;
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19 local tonumber = tonumber;
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20 local next = next;
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21 local t_insert = table.insert;
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22 local t_concat = table.concat;
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23 local envloadfile = require"util.envload".envloadfile;
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24 local serialize = require "util.serialization".serialize;
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25 local path_separator = assert ( package.config:match ( "^([^\n]+)" ) , "package.config not in standard form" ) -- Extract directory seperator from package.config (an undocumented string that comes with lua)
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26 local lfs = require "lfs";
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27 local prosody = prosody;
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28
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29 local raw_mkdir = lfs.mkdir;
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30 local function fallocate(f, offset, len)
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31 -- This assumes that current position == offset
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32 local fake_data = (" "):rep(len);
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33 local ok, msg = f:write(fake_data);
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34 if not ok then
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35 return ok, msg;
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36 end
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37 f:seek("set", offset);
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38 return true;
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39 end;
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40 pcall(function()
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41 local pposix = require "util.pposix";
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42 raw_mkdir = pposix.mkdir or raw_mkdir; -- Doesn't trample on umask
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43 fallocate = pposix.fallocate or fallocate;
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44 end);
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45
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46 module "datamanager"
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47
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48 ---- utils -----
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49 local encode, decode;
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50 do
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51 local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
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52
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53 decode = function (s)
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54 return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes));
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55 end
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56
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57 encode = function (s)
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58 return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end));
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59 end
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60 end
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61
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62 local _mkdir = {};
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63 local function mkdir(path)
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64 path = path:gsub("/", path_separator); -- TODO as an optimization, do this during path creation rather than here
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65 if not _mkdir[path] then
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66 raw_mkdir(path);
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67 _mkdir[path] = true;
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68 end
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69 return path;
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70 end
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71
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72 local data_path = (prosody and prosody.paths and prosody.paths.data) or ".";
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73 local callbacks = {};
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74
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75 ------- API -------------
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76
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77 function set_data_path(path)
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78 log("debug", "Setting data path to: %s", path);
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79 data_path = path;
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80 end
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81
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82 local function callback(username, host, datastore, data)
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83 for _, f in ipairs(callbacks) do
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84 username, host, datastore, data = f(username, host, datastore, data);
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85 if username == false then break; end
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86 end
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87
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88 return username, host, datastore, data;
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89 end
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90 function add_callback(func)
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91 if not callbacks[func] then -- Would you really want to set the same callback more than once?
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92 callbacks[func] = true;
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93 callbacks[#callbacks+1] = func;
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94 return true;
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95 end
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96 end
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97 function remove_callback(func)
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98 if callbacks[func] then
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99 for i, f in ipairs(callbacks) do
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100 if f == func then
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101 callbacks[i] = nil;
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102 callbacks[f] = nil;
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103 return true;
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104 end
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105 end
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106 end
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107 end
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108
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109 function getpath(username, host, datastore, ext, create)
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110 ext = ext or "dat";
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111 host = (host and encode(host)) or "_global";
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112 username = username and encode(username);
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113 if username then
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114 if create then mkdir(mkdir(mkdir(data_path).."/"..host).."/"..datastore); end
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115 return format("%s/%s/%s/%s.%s", data_path, host, datastore, username, ext);
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116 else
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117 if create then mkdir(mkdir(data_path).."/"..host); end
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118 return format("%s/%s/%s.%s", data_path, host, datastore, ext);
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119 end
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120 end
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121
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122 function load(username, host, datastore)
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123 local data, ret = envloadfile(getpath(username, host, datastore), {});
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124 if not data then
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125 local mode = lfs.attributes(getpath(username, host, datastore), "mode");
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126 if not mode then
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127 log("debug", "Assuming empty %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
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128 return nil;
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129 else -- file exists, but can't be read
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130 -- TODO more detailed error checking and logging?
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parents: 4452
diff changeset
131 log("error", "Failed to load %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
3086
931acb1188b1 util.datamanager: When failing to load a file, and the file exists, return nil, error.
Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
132 return nil, "Error reading storage";
931acb1188b1 util.datamanager: When failing to load a file, and the file exists, return nil, error.
Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
133 end
117
8e5c5e6a3240 Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents: 88
diff changeset
134 end
5021
85b2689dbcfe Eliminate direct setfenv usage
Florian Zeitz <florob@babelmonkeys.de>
parents: 4452
diff changeset
135
0
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parents:
diff changeset
136 local success, ret = pcall(data);
117
8e5c5e6a3240 Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents: 88
diff changeset
137 if not success then
4993
5243b74a4cbb Hopefully inert commit to clean up logging across a number of modules, removing all cases of concatenation when building log messages
Matthew Wild <mwild1@gmail.com>
parents: 4452
diff changeset
138 log("error", "Unable to load %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
3086
931acb1188b1 util.datamanager: When failing to load a file, and the file exists, return nil, error.
Waqas Hussain <waqas20@gmail.com>
parents: 2925
diff changeset
139 return nil, "Error reading storage";
117
8e5c5e6a3240 Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents: 88
diff changeset
140 end
0
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
diff changeset
141 return ret;
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
diff changeset
142 end
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
diff changeset
143
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parents: 5045
diff changeset
144 local function atomic_store(filename, data)
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Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
145 local scratch = filename.."~";
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
146 local f, ok, msg;
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
147 repeat
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
148 f, msg = io_open(scratch, "w");
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
149 if not f then break end
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
150
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
151 ok, msg = f:write(data);
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
152 if not ok then break end
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
153
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
154 ok, msg = f:close();
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
155 if not ok then break end
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
156
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
157 return os_rename(scratch, filename);
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parents: 5045
diff changeset
158 until false;
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
159
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
160 -- Cleanup
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
161 if f then f:close(); end
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
162 os_remove(scratch);
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
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parents: 5045
diff changeset
163 return nil, msg;
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
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164 end
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parents: 5045
diff changeset
165
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acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
166 if prosody.platform ~= "posix" then
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parents: 5057
diff changeset
167 -- os.rename does not overwrite existing files on Windows
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
168 -- TODO We could use Transactional NTFS on Vista and above
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parents: 5057
diff changeset
169 function atomic_store(filename, data)
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
170 local f, err = io_open(filename, "w");
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parents: 5057
diff changeset
171 if not f then return f, err; end
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
172 local ok, msg = f:write(data);
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
173 if not ok then f:close(); return ok, msg; end
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
174 return f:close();
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
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parents: 5057
diff changeset
175 end
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
Waqas Hussain <waqas20@gmail.com>
parents: 5057
diff changeset
176 end
acfaf771f10e util.datamanager: Don't use os.rename on non-POSIX. It doesn't overwrite exisitng files on Windows.
Waqas Hussain <waqas20@gmail.com>
parents: 5057
diff changeset
177
0
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parents:
diff changeset
178 function store(username, host, datastore, data)
206
e30d0e30a0ff Datamanager now deletes files with no data
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parents: 182
diff changeset
179 if not data then
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parents: 182
diff changeset
180 data = {};
e30d0e30a0ff Datamanager now deletes files with no data
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parents: 182
diff changeset
181 end
1381
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Matthew Wild <mwild1@gmail.com>
parents: 1097
diff changeset
182
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Matthew Wild <mwild1@gmail.com>
parents: 1097
diff changeset
183 username, host, datastore, data = callback(username, host, datastore, data);
1462
44780b856ce7 datamanager: Fixed incorrect callback result checking
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parents: 1381
diff changeset
184 if username == false then
1381
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parents: 1097
diff changeset
185 return true; -- Don't save this data at all
46a58df8557d util.datamanager: Allow multiple data storage callbacks, and allow them to modify parameters
Matthew Wild <mwild1@gmail.com>
parents: 1097
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186 end
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Matthew Wild <mwild1@gmail.com>
parents: 1097
diff changeset
187
206
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parents: 182
diff changeset
188 -- save the datastore
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parents: 5045
diff changeset
189 local d = "return " .. serialize(data) .. ";\n";
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Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
190 local ok, msg = atomic_store(getpath(username, host, datastore, nil, true), d);
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
191 if not ok then
4993
5243b74a4cbb Hopefully inert commit to clean up logging across a number of modules, removing all cases of concatenation when building log messages
Matthew Wild <mwild1@gmail.com>
parents: 4452
diff changeset
192 log("error", "Unable to write to %s storage ('%s') for user: %s@%s", datastore, msg, username or "nil", host or "nil");
3108
df0df92dd58a util.datamanager: Return an error string when failing to save.
Waqas Hussain <waqas20@gmail.com>
parents: 3086
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193 return nil, "Error saving to storage";
117
8e5c5e6a3240 Fixed: datamanager.store and datamanager.load could crash when username or host arguments were nil. (useful for server specific and global data).
Waqas Hussain <waqas20@gmail.com>
parents: 88
diff changeset
194 end
915
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Matthew Wild <mwild1@gmail.com>
parents: 896
diff changeset
195 if next(data) == nil then -- try to delete empty datastore
1732
f1282fad2f99 datamanager: Fixed logging errors on deletion of datastores not owned by a user@host
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
196 log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
206
e30d0e30a0ff Datamanager now deletes files with no data
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parents: 182
diff changeset
197 os_remove(getpath(username, host, datastore));
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parents: 182
diff changeset
198 end
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parents: 182
diff changeset
199 -- we write data even when we are deleting because lua doesn't have a
e30d0e30a0ff Datamanager now deletes files with no data
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parents: 182
diff changeset
200 -- platform independent way of checking for non-exisitng files
0
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parents:
diff changeset
201 return true;
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
diff changeset
202 end
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
parents:
diff changeset
203
247
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Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
204 function list_append(username, host, datastore, data)
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
205 if not data then return; end
1462
44780b856ce7 datamanager: Fixed incorrect callback result checking
Waqas Hussain <waqas20@gmail.com>
parents: 1381
diff changeset
206 if callback(username, host, datastore) == false then return true; end
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
207 -- save the datastore
5066
4be7093edde9 util.datamanager: Try to open in read+write mode, then retry with write mode if that fails (usually because it doesn't exist)
Kim Alvefur <zash@zash.se>
parents: 5057
diff changeset
208 local f, msg = io_open(getpath(username, host, datastore, "list", true), "r+");
4be7093edde9 util.datamanager: Try to open in read+write mode, then retry with write mode if that fails (usually because it doesn't exist)
Kim Alvefur <zash@zash.se>
parents: 5057
diff changeset
209 if not f then
4be7093edde9 util.datamanager: Try to open in read+write mode, then retry with write mode if that fails (usually because it doesn't exist)
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parents: 5057
diff changeset
210 f, msg = io_open(getpath(username, host, datastore, "list", true), "w");
4be7093edde9 util.datamanager: Try to open in read+write mode, then retry with write mode if that fails (usually because it doesn't exist)
Kim Alvefur <zash@zash.se>
parents: 5057
diff changeset
211 end
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
212 if not f then
4993
5243b74a4cbb Hopefully inert commit to clean up logging across a number of modules, removing all cases of concatenation when building log messages
Matthew Wild <mwild1@gmail.com>
parents: 4452
diff changeset
213 log("error", "Unable to write to %s storage ('%s') for user: %s@%s", datastore, msg, username or "nil", host or "nil");
247
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Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
214 return;
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
215 end
5045
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parents: 5038
diff changeset
216 local data = "item(" .. serialize(data) .. ");\n";
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
217 local pos = f:seek("end");
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
218 local ok, msg = fallocate(f, pos, #data);
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
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parents: 5038
diff changeset
219 f:seek("set", pos);
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
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parents: 5038
diff changeset
220 if ok then
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
221 f:write(data);
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
222 else
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
223 log("error", "Unable to write to %s storage ('%s') for user: %s@%s", datastore, msg, username or "nil", host or "nil");
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
224 return ok, msg;
4ba6940deed0 util.datamanager: Use pposix.fallocate() to make sure appends succeed. Also add a fallback fallocate()
Kim Alvefur <zash@zash.se>
parents: 5038
diff changeset
225 end
247
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Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
226 f:close();
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
227 return true;
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
228 end
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
229
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
230 function list_store(username, host, datastore, data)
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
231 if not data then
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
232 data = {};
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
233 end
1462
44780b856ce7 datamanager: Fixed incorrect callback result checking
Waqas Hussain <waqas20@gmail.com>
parents: 1381
diff changeset
234 if callback(username, host, datastore) == false then return true; end
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
235 -- save the datastore
5049
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
236 local d = {};
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
237 for _, item in ipairs(data) do
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
238 d[#d+1] = "item(" .. serialize(item) .. ");\n";
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
239 end
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
240 local ok, msg = atomic_store(getpath(username, host, datastore, "list", true), t_concat(d));
5d685f123332 util.datamanager: Write to a temporary file and atomically move it into place
Kim Alvefur <zash@zash.se>
parents: 5045
diff changeset
241 if not ok then
4993
5243b74a4cbb Hopefully inert commit to clean up logging across a number of modules, removing all cases of concatenation when building log messages
Matthew Wild <mwild1@gmail.com>
parents: 4452
diff changeset
242 log("error", "Unable to write to %s storage ('%s') for user: %s@%s", datastore, msg, username or "nil", host or "nil");
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
243 return;
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
244 end
915
0fe5bf7ab81d util.datamanager: Don't delete data when first entry in table is 'false'. My favourite bug so far.
Matthew Wild <mwild1@gmail.com>
parents: 896
diff changeset
245 if next(data) == nil then -- try to delete empty datastore
1732
f1282fad2f99 datamanager: Fixed logging errors on deletion of datastores not owned by a user@host
Waqas Hussain <waqas20@gmail.com>
parents: 1523
diff changeset
246 log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
247 os_remove(getpath(username, host, datastore, "list"));
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248 end
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249 -- we write data even when we are deleting because lua doesn't have a
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diff changeset
250 -- platform independent way of checking for non-exisitng files
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diff changeset
251 return true;
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252 end
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diff changeset
253
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diff changeset
254 function list_load(username, host, datastore)
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diff changeset
255 local items = {};
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256 local data, ret = envloadfile(getpath(username, host, datastore, "list"), {item = function(i) t_insert(items, i); end});
247
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diff changeset
257 if not data then
3722
f15b6ed967b7 util.datamanager: When failing to load a list file, and the file exists, log an error, and return nil, error.
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258 local mode = lfs.attributes(getpath(username, host, datastore, "list"), "mode");
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diff changeset
259 if not mode then
4993
5243b74a4cbb Hopefully inert commit to clean up logging across a number of modules, removing all cases of concatenation when building log messages
Matthew Wild <mwild1@gmail.com>
parents: 4452
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260 log("debug", "Assuming empty %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
3722
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diff changeset
261 return nil;
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262 else -- file exists, but can't be read
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263 -- TODO more detailed error checking and logging?
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parents: 4452
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264 log("error", "Failed to load %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
3722
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265 return nil, "Error reading storage";
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266 end
247
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267 end
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268
247
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diff changeset
269 local success, ret = pcall(data);
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diff changeset
270 if not success then
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Matthew Wild <mwild1@gmail.com>
parents: 4452
diff changeset
271 log("error", "Unable to load %s storage ('%s') for user: %s@%s", datastore, ret, username or "nil", host or "nil");
3723
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diff changeset
272 return nil, "Error reading storage";
247
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273 end
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diff changeset
274 return items;
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275 end
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diff changeset
276
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277 local type_map = {
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diff changeset
278 keyval = "dat";
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279 list = "list";
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280 }
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281
5153
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282 function users(host, store, typ)
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diff changeset
283 typ = type_map[typ or "keyval"];
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diff changeset
284 local store_dir = format("%s/%s/%s", data_path, encode(host), encode(store));
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diff changeset
285
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diff changeset
286 local mode, err = lfs.attributes(store_dir, "mode");
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diff changeset
287 if not mode then
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diff changeset
288 return function() log("debug", err or (store_dir .. " does not exist")) end
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289 end
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diff changeset
290 local next, state = lfs.dir(store_dir);
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diff changeset
291 return function(state)
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diff changeset
292 for node in next, state do
688aeac0012a mod_storage_internal, datamanager: Add support for iterating over users with data in a store
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diff changeset
293 local file, ext = node:match("^(.*)%.([dalist]+)$");
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diff changeset
294 if file and ext == typ then
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diff changeset
295 return decode(file);
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parents: 5130
diff changeset
296 end
688aeac0012a mod_storage_internal, datamanager: Add support for iterating over users with data in a store
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diff changeset
297 end
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diff changeset
298 end, state;
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299 end
688aeac0012a mod_storage_internal, datamanager: Add support for iterating over users with data in a store
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diff changeset
300
5130
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diff changeset
301 function stores(username, host, typ)
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diff changeset
302 typ = type_map[typ or "keyval"];
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diff changeset
303 local store_dir = format("%s/%s/", data_path, encode(host));
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diff changeset
304
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diff changeset
305 local mode, err = lfs.attributes(store_dir, "mode");
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diff changeset
306 if not mode then
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diff changeset
307 return function() log("debug", err or (store_dir .. " does not exist")) end
5032
c40ea227f8af util.datamanager: Add function for listing stores
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diff changeset
308 end
5130
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
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diff changeset
309 local next, state = lfs.dir(store_dir);
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diff changeset
310 return function(state)
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diff changeset
311 for node in next, state do
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
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diff changeset
312 if not node:match"^%." then
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diff changeset
313 if username == true then
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Kim Alvefur <zash@zash.se>
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diff changeset
314 if lfs.attributes(store_dir..node, "mode") == "directory" then
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
315 return decode(node);
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
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parents: 5118
diff changeset
316 end
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
317 elseif username then
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
318 local store = decode(node)
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Kim Alvefur <zash@zash.se>
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diff changeset
319 if lfs.attributes(getpath(username, host, store, typ), "mode") then
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
320 return store;
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
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parents: 5118
diff changeset
321 end
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
322 elseif lfs.attributes(node, "mode") == "file" then
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
323 local file, ext = node:match("^(.*)%.([dalist]+)$");
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
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parents: 5118
diff changeset
324 if ext == typ then
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
325 return decode(file)
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
326 end
5032
c40ea227f8af util.datamanager: Add function for listing stores
Kim Alvefur <zash@zash.se>
parents: 5024
diff changeset
327 end
c40ea227f8af util.datamanager: Add function for listing stores
Kim Alvefur <zash@zash.se>
parents: 5024
diff changeset
328 end
c40ea227f8af util.datamanager: Add function for listing stores
Kim Alvefur <zash@zash.se>
parents: 5024
diff changeset
329 end
5130
051d352ed03c storagemanager, datamanager, mod_storage_{internal,sql}: Replace list_stores() with an iterator version
Kim Alvefur <zash@zash.se>
parents: 5118
diff changeset
330 end, state;
5032
c40ea227f8af util.datamanager: Add function for listing stores
Kim Alvefur <zash@zash.se>
parents: 5024
diff changeset
331 end
c40ea227f8af util.datamanager: Add function for listing stores
Kim Alvefur <zash@zash.se>
parents: 5024
diff changeset
332
5103
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
333 local function do_remove(path)
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
334 local ok, err = os_remove(path);
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
335 if not ok and lfs.attributes(path, "mode") then
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
336 return ok, err;
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
337 end
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
338 return true
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
339 end
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
340
5038
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
341 function purge(username, host)
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
342 local host_dir = format("%s/%s/", data_path, encode(host));
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
343 local deleted = 0;
5095
dddbcd62183a util.datamanager: Collect errors when deleting all stores of a user, but ignore "no such file"
Kim Alvefur <zash@zash.se>
parents: 5069
diff changeset
344 local errs = {};
5038
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
345 for file in lfs.dir(host_dir) do
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
346 if lfs.attributes(host_dir..file, "mode") == "directory" then
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
347 local store = decode(file);
5103
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
348 local ok, err = do_remove(getpath(username, host, store));
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
349 if not ok then errs[#errs+1] = err; end
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
350
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
351 local ok, err = do_remove(getpath(username, host, store, "list"));
5a1488369c35 util.datamanager: Ignore errors if the file is gone after removing it
Kim Alvefur <zash@zash.se>
parents: 5095
diff changeset
352 if not ok then errs[#errs+1] = err; end
5038
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
353 end
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
354 end
5095
dddbcd62183a util.datamanager: Collect errors when deleting all stores of a user, but ignore "no such file"
Kim Alvefur <zash@zash.se>
parents: 5069
diff changeset
355 return #errs == 0, t_concat(errs, ", ");
5038
242c62ff8e77 util.datamanager: Add function for removing all data belonging to a user
Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
356 end
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Kim Alvefur <zash@zash.se>
parents: 5032
diff changeset
357
247
681b29aa134f Added support for storing (and removing), loading and appending to lists of data to datamanager (for supporting offline messages)
Waqas Hussain <waqas20@gmail.com>
parents: 206
diff changeset
358 return _M;