1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
-- Prosody IM
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local format = string.format;
local setmetatable, type = setmetatable, type;
local pairs, ipairs = pairs, ipairs;
local char = string.char;
local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
local log = require "util.logger".init("datamanager");
local io_open = io.open;
local os_remove = os.remove;
local tostring, tonumber = tostring, tonumber;
local error = error;
local next = next;
local t_insert = table.insert;
local append = require "util.serialization".append;
local path_separator = "/"; if os.getenv("WINDIR") then path_separator = "\\" end
local raw_mkdir;
if prosody.platform == "posix" then
raw_mkdir = require "util.pposix".mkdir; -- Doesn't trample on umask
else
raw_mkdir = require "lfs".mkdir;
end
module "datamanager"
---- utils -----
local encode, decode;
do
local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
decode = function (s)
return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes));
end
encode = function (s)
return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end));
end
end
local _mkdir = {};
local function mkdir(path)
path = path:gsub("/", path_separator); -- TODO as an optimization, do this during path creation rather than here
if not _mkdir[path] then
raw_mkdir(path);
_mkdir[path] = true;
end
return path;
end
local data_path = "data";
local callbacks = {};
------- API -------------
local _set_data_path;
function set_data_path(path)
if _set_data_path then return _set_data_path(path); end
log("debug", "Setting data path to: %s", path);
data_path = path;
end
local function callback(username, host, datastore, data)
for _, f in ipairs(callbacks) do
username, host, datastore, data = f(username, host, datastore, data);
if username == false then break; end
end
return username, host, datastore, data;
end
local _add_callback;
function add_callback(func)
if _add_callback then return _add_callback(func); end
if not callbacks[func] then -- Would you really want to set the same callback more than once?
callbacks[func] = true;
callbacks[#callbacks+1] = func;
return true;
end
end
local _remove_callback;
function remove_callback(func)
if _remove_callback then return _remove_callback(func); end
if callbacks[func] then
for i, f in ipairs(callbacks) do
if f == func then
callbacks[i] = nil;
callbacks[f] = nil;
return true;
end
end
end
end
local _getpath;
function getpath(username, host, datastore, ext, create)
if _getpath then return _getpath(username, host, datastore, ext, create); end
ext = ext or "dat";
host = (host and encode(host)) or "_global";
username = username and encode(username);
if username then
if create then mkdir(mkdir(mkdir(data_path).."/"..host).."/"..datastore); end
return format("%s/%s/%s/%s.%s", data_path, host, datastore, username, ext);
elseif host then
if create then mkdir(mkdir(data_path).."/"..host); end
return format("%s/%s/%s.%s", data_path, host, datastore, ext);
else
if create then mkdir(data_path); end
return format("%s/%s.%s", data_path, datastore, ext);
end
end
local _load;
function load(username, host, datastore)
if _load then return _load(username, host, datastore); end
local data, ret = loadfile(getpath(username, host, datastore));
if not data then
log("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
end
setfenv(data, {});
local success, ret = pcall(data);
if not success then
log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
end
return ret;
end
local _store;
function store(username, host, datastore, data)
if _store then return _store(username, host, datastore, data); end
if not data then
data = {};
end
username, host, datastore, data = callback(username, host, datastore, data);
if username == false then
return true; -- Don't save this data at all
end
-- save the datastore
local f, msg = io_open(getpath(username, host, datastore, nil, true), "w+");
if not f then
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
return;
end
f:write("return ");
append(f, data);
f:close();
if next(data) == nil then -- try to delete empty datastore
log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
os_remove(getpath(username, host, datastore));
end
-- we write data even when we are deleting because lua doesn't have a
-- platform independent way of checking for non-exisitng files
return true;
end
local _list_append;
function list_append(username, host, datastore, data)
if _list_append then return _list_append(username, host, datastore, data); end
if not data then return; end
if callback(username, host, datastore) == false then return true; end
-- save the datastore
local f, msg = io_open(getpath(username, host, datastore, "list", true), "a+");
if not f then
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
return;
end
f:write("item(");
append(f, data);
f:write(");\n");
f:close();
return true;
end
local _list_store;
function list_store(username, host, datastore, data)
if _list_store then return _list_store(username, host, datastore, data); end
if not data then
data = {};
end
if callback(username, host, datastore) == false then return true; end
-- save the datastore
local f, msg = io_open(getpath(username, host, datastore, "list", true), "w+");
if not f then
log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil"));
return;
end
for _, d in ipairs(data) do
f:write("item(");
append(f, d);
f:write(");\n");
end
f:close();
if next(data) == nil then -- try to delete empty datastore
log("debug", "Removing empty %s datastore for user %s@%s", datastore, username or "nil", host or "nil");
os_remove(getpath(username, host, datastore, "list"));
end
-- we write data even when we are deleting because lua doesn't have a
-- platform independent way of checking for non-exisitng files
return true;
end
local _list_load;
function list_load(username, host, datastore)
if _list_load then return _list_load(username, host, datastore); end
local data, ret = loadfile(getpath(username, host, datastore, "list"));
if not data then
log("debug", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
end
local items = {};
setfenv(data, {item = function(i) t_insert(items, i); end});
local success, ret = pcall(data);
if not success then
log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
end
return items;
end
function set(t)
_set_data_path = t.set_data_path;
_add_callback = t.add_callback;
_remove_callback = t.remove_callback;
_getpath = t.getpath;
_load = t.load;
_store = t.store;
_list_append = t.list_append;
_list_store = t.list_store;
_list_load = t.list_load;
end
function get()
return {
set_data_path = _set_data_path;
add_callback = _add_callback;
remove_callback = _remove_callback;
getpath = _getpath;
load = _load;
store = _store;
list_append = _list_append;
list_store = _list_store;
list_load = _list_load;
};
end
return _M;
|
