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
|
local t_insert = table.insert;
local t_remove = table.remove;
local s_format = string.format;
local tostring = tostring;
local setmetatable = setmetatable;
local pairs = pairs;
local ipairs = ipairs;
local type = type;
local next = next;
local print = print;
local unpack = unpack;
local s_gsub = string.gsub;
local debug = debug;
local log = require "util.logger".init("stanza");
module "stanza"
stanza_mt = {};
stanza_mt.__index = stanza_mt;
function stanza(name, attr)
local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
return setmetatable(stanza, stanza_mt);
end
function stanza_mt:query(xmlns)
return self:tag("query", { xmlns = xmlns });
end
function stanza_mt:tag(name, attrs)
local s = stanza(name, attrs);
(self.last_add[#self.last_add] or self):add_direct_child(s);
t_insert(self.last_add, s);
return self;
end
function stanza_mt:text(text)
(self.last_add[#self.last_add] or self):add_direct_child(text);
return self;
end
function stanza_mt:up()
t_remove(self.last_add);
return self;
end
function stanza_mt:add_direct_child(child)
if type(child) == "table" then
t_insert(self.tags, child);
end
t_insert(self, child);
end
function stanza_mt:add_child(child)
(self.last_add[#self.last_add] or self):add_direct_child(child);
t_insert(self.last_add, s);
return self;
end
function stanza_mt:child_with_name(name)
for _, child in ipairs(self) do
if child.name == name then return child; end
end
end
function stanza_mt:children()
local i = 0;
return function (a)
i = i + 1
local v = a[i]
if v then return v; end
end, self, i;
end
function stanza_mt:childtags()
local i = 0;
return function (a)
i = i + 1
local v = self.tags[i]
if v then return v; end
end, self.tags[1], i;
end
do
local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" };
function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
end
local xml_escape = xml_escape;
function stanza_mt.__tostring(t)
local children_text = "";
for n, child in ipairs(t) do
if type(child) == "string" then
children_text = children_text .. xml_escape(child);
else
children_text = children_text .. tostring(child);
end
end
local attr_string = "";
if t.attr then
for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, tostring(v)); end end
end
return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name);
end
function stanza_mt.__add(s1, s2)
return s1:add_direct_child(s2);
end
do
local id = 0;
function new_id()
id = id + 1;
return "lx"..id;
end
end
function preserialize(stanza)
local s = { name = stanza.name, attr = stanza.attr };
for _, child in ipairs(stanza) do
if type(child) == "table" then
t_insert(s, preserialize(child));
else
t_insert(s, child);
end
end
return s;
end
function deserialize(stanza)
-- Set metatable
if stanza then
setmetatable(stanza, stanza_mt);
for _, child in ipairs(stanza) do
if type(child) == "table" then
deserialize(child);
end
end
if not stanza.tags then
-- Rebuild tags
local tags = {};
for _, child in ipairs(stanza) do
if type(child) == "table" then
t_insert(tags, child);
end
end
stanza.tags = tags;
end
end
return stanza;
end
function message(attr, body)
if not body then
return stanza("message", attr);
else
return stanza("message", attr):tag("body"):text(body);
end
end
function iq(attr)
if attr and not attr.id then attr.id = new_id(); end
return stanza("iq", attr or { id = new_id() });
end
function reply(orig)
return stanza(orig.name, orig.attr and { to = orig.attr.from, from = orig.attr.to, id = orig.attr.id, type = ((orig.name == "iq" and "result") or nil) });
end
function error_reply(orig, type, condition, message, clone)
local t = reply(orig);
t.attr.type = "error";
-- TODO use clone
t:tag("error", {type = type})
:tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
if (message) then t:tag("text"):text(message):up(); end
return t; -- stanza ready for adding app-specific errors
end
function presence(attr)
return stanza("presence", attr);
end
return _M;
|
