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util/stanza.lua @ 145:fbb3a4ff9cf1 s2s
dialback keys now verified
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 24 Oct 2008 03:06:55 +0100 |
parent | 91:6d66eb6b24cb |
child | 180:d8b9a19d70eb |
rev | line source |
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1 local t_insert = table.insert; |
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2 local t_remove = table.remove; |
23 | 3 local s_format = string.format; |
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4 local tostring = tostring; |
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5 local setmetatable = setmetatable; |
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6 local pairs = pairs; |
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7 local ipairs = ipairs; |
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8 local type = type; |
145 | 9 local next = next; |
10 local print = print; | |
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11 local unpack = unpack; |
4 | 12 local s_gsub = string.gsub; |
145 | 13 |
14 local debug = debug; | |
15 local log = require "util.logger".init("stanza"); | |
16 | |
0 | 17 module "stanza" |
18 | |
19 stanza_mt = {}; | |
20 stanza_mt.__index = stanza_mt; | |
21 | |
22 function stanza(name, attr) | |
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23 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 24 return setmetatable(stanza, stanza_mt); |
25 end | |
26 | |
27 function stanza_mt:query(xmlns) | |
28 return self:tag("query", { xmlns = xmlns }); | |
29 end | |
30 function stanza_mt:tag(name, attrs) | |
31 local s = stanza(name, attrs); | |
32 (self.last_add[#self.last_add] or self):add_child(s); | |
33 t_insert(self.last_add, s); | |
34 return self; | |
35 end | |
36 | |
37 function stanza_mt:text(text) | |
38 (self.last_add[#self.last_add] or self):add_child(text); | |
39 return self; | |
40 end | |
41 | |
42 function stanza_mt:up() | |
43 t_remove(self.last_add); | |
44 return self; | |
45 end | |
46 | |
47 function stanza_mt:add_child(child) | |
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48 if type(child) == "table" then |
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49 t_insert(self.tags, child); |
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50 end |
0 | 51 t_insert(self, child); |
52 end | |
53 | |
54 function stanza_mt:child_with_name(name) | |
55 for _, child in ipairs(self) do | |
56 if child.name == name then return child; end | |
57 end | |
58 end | |
59 | |
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60 function stanza_mt:children() |
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61 local i = 0; |
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62 return function (a) |
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63 i = i + 1 |
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64 local v = a[i] |
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65 if v then return v; end |
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66 end, self, i; |
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67 |
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68 end |
2 | 69 function stanza_mt:childtags() |
70 local i = 0; | |
71 return function (a) | |
72 i = i + 1 | |
73 local v = self.tags[i] | |
74 if v then return v; end | |
75 end, self.tags[1], i; | |
76 | |
77 end | |
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78 |
4 | 79 do |
80 local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; | |
81 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end | |
82 end | |
83 | |
84 local xml_escape = xml_escape; | |
85 | |
0 | 86 function stanza_mt.__tostring(t) |
87 local children_text = ""; | |
88 for n, child in ipairs(t) do | |
4 | 89 if type(child) == "string" then |
90 children_text = children_text .. xml_escape(child); | |
91 else | |
92 children_text = children_text .. tostring(child); | |
93 end | |
0 | 94 end |
95 | |
96 local attr_string = ""; | |
97 if t.attr then | |
23 | 98 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 |
0 | 99 end |
23 | 100 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name); |
0 | 101 end |
102 | |
103 function stanza_mt.__add(s1, s2) | |
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104 return s1:add_child(s2); |
0 | 105 end |
106 | |
107 | |
108 do | |
109 local id = 0; | |
110 function new_id() | |
111 id = id + 1; | |
112 return "lx"..id; | |
113 end | |
114 end | |
115 | |
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116 function preserialize(stanza) |
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117 local s = { name = stanza.name, attr = stanza.attr }; |
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118 for _, child in ipairs(stanza) do |
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119 if type(child) == "table" then |
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120 t_insert(s, preserialize(child)); |
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121 else |
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122 t_insert(s, child); |
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123 end |
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124 end |
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125 return s; |
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126 end |
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127 |
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128 function deserialize(stanza) |
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129 -- Set metatable |
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130 if stanza then |
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131 setmetatable(stanza, stanza_mt); |
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132 for _, child in ipairs(stanza) do |
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133 if type(child) == "table" then |
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134 deserialize(child); |
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135 end |
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136 end |
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137 if not stanza.tags then |
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138 -- Rebuild tags |
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139 local tags = {}; |
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140 for _, child in ipairs(stanza) do |
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141 if type(child) == "table" then |
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142 t_insert(tags, child); |
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143 end |
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144 end |
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145 stanza.tags = tags; |
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146 end |
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147 end |
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148 |
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149 return stanza; |
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150 end |
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151 |
0 | 152 function message(attr, body) |
153 if not body then | |
154 return stanza("message", attr); | |
155 else | |
156 return stanza("message", attr):tag("body"):text(body); | |
157 end | |
158 end | |
159 function iq(attr) | |
160 if attr and not attr.id then attr.id = new_id(); end | |
161 return stanza("iq", attr or { id = new_id() }); | |
162 end | |
163 | |
164 function reply(orig) | |
165 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) }); | |
166 end | |
167 | |
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168 function error_reply(orig, type, condition, message, clone) |
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169 local t = reply(orig); |
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170 t.attr.type = "error"; |
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171 -- TODO use clone |
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172 t:tag("error", {type = type}) |
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173 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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174 if (message) then t:tag("text"):text(message):up(); end |
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175 return t; -- stanza ready for adding app-specific errors |
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176 end |
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177 |
0 | 178 function presence(attr) |
179 return stanza("presence", attr); | |
180 end | |
181 | |
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182 return _M; |