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
|
-- 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 match, sub = string.match, string.sub;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local nameprep = require "util.encodings".stringprep.nameprep;
local resourceprep = require "util.encodings".stringprep.resourceprep;
local escapes = {
[" "] = "\\20"; ['"'] = "\\22";
["&"] = "\\26"; ["'"] = "\\27";
["/"] = "\\2f"; [":"] = "\\3a";
["<"] = "\\3c"; [">"] = "\\3e";
["@"] = "\\40"; ["\\"] = "\\5c";
};
local unescapes = {};
for k,v in pairs(escapes) do unescapes[v] = k; end
local _ENV = nil;
local function split(jid)
if not jid then return; end
local node, nodepos = match(jid, "^([^@/]+)@()");
local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
if node and not host then return nil, nil, nil; end
local resource = match(jid, "^/(.+)$", hostpos);
if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
return node, host, resource;
end
local function bare(jid)
local node, host = split(jid);
if node and host then
return node.."@"..host;
end
return host;
end
local function prepped_split(jid)
local node, host, resource = split(jid);
if host then
if sub(host, -1, -1) == "." then -- Strip empty root label
host = sub(host, 1, -2);
end
host = nameprep(host);
if not host then return; end
if node then
node = nodeprep(node);
if not node then return; end
end
if resource then
resource = resourceprep(resource);
if not resource then return; end
end
return node, host, resource;
end
end
local function join(node, host, resource)
if not host then return end
if node and resource then
return node.."@"..host.."/"..resource;
elseif node then
return node.."@"..host;
elseif resource then
return host.."/"..resource;
end
return host;
end
local function prep(jid)
local node, host, resource = prepped_split(jid);
return join(node, host, resource);
end
local function compare(jid, acl)
-- compare jid to single acl rule
-- TODO compare to table of rules?
local jid_node, jid_host, jid_resource = split(jid);
local acl_node, acl_host, acl_resource = split(acl);
if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
return true
end
return false
end
local function escape(s) return s and (s:gsub(".", escapes)); end
local function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
return {
split = split;
bare = bare;
prepped_split = prepped_split;
join = join;
prep = prep;
compare = compare;
escape = escape;
unescape = unescape;
};
|
