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
|
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 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 lfs = require "lfs";
local prosody = prosody;
local raw_mkdir;
if prosody.platform == "posix" then
raw_mkdir = require "util.pposix".mkdir; -- Doesn't trample on umask
else
raw_mkdir = 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 = (prosody and prosody.paths and prosody.paths.data) or ".";
local callbacks = {};
------- API -------------
function set_data_path(path)
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
function add_callback(func)
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
function remove_callback(func)
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
function getpath(username, host, datastore, ext, create)
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
function load(username, host, datastore)
local data, ret = loadfile(getpath(username, host, datastore));
if not data then
local mode = lfs.attributes(getpath(username, host, datastore), "mode");
if not mode then
log("debug", "Assuming empty "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
else -- file exists, but can't be read
-- TODO more detailed error checking and logging?
log("error", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil, "Error reading storage";
end
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, "Error reading storage";
end
return ret;
end
function store(username, host, datastore, data)
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 nil, "Error saving to storage";
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
function list_append(username, host, datastore, data)
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
function list_store(username, host, datastore, data)
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
function list_load(username, host, datastore)
local data, ret = loadfile(getpath(username, host, datastore, "list"));
if not data then
local mode = lfs.attributes(getpath(username, host, datastore, "list"), "mode");
if not mode then
log("debug", "Assuming empty "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil;
else -- file exists, but can't be read
-- TODO more detailed error checking and logging?
log("error", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil"));
return nil, "Error reading storage";
end
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, "Error reading storage";
end
return items;
end
return _M;
|
