prosody
a6c00467a3f8
util/stanza.lua

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util/stanza.lua @ 70:a6c00467a3f8

Fixed typo in variable name
author Waqas Hussain <waqas20@gmail.com>
date Wed, 08 Oct 2008 03:38:07 +0500
parent 62:9ec0d447cc9e
child 90:da468ed49a7b
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rev   line source
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1 local t_insert = table.insert;
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2 local t_remove = table.remove;
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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;
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9 local s_gsub = string.gsub;
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10 module "stanza"
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11
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12 stanza_mt = {};
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13 stanza_mt.__index = stanza_mt;
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14
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15 function stanza(name, attr)
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16 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
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17 return setmetatable(stanza, stanza_mt);
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18 end
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19
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20 function stanza_mt:query(xmlns)
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21 return self:tag("query", { xmlns = xmlns });
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22 end
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23 function stanza_mt:tag(name, attrs)
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24 local s = stanza(name, attrs);
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25 (self.last_add[#self.last_add] or self):add_child(s);
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26 t_insert(self.last_add, s);
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27 return self;
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28 end
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29
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30 function stanza_mt:text(text)
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31 (self.last_add[#self.last_add] or self):add_child(text);
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32 return self;
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33 end
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34
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35 function stanza_mt:up()
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36 t_remove(self.last_add);
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37 return self;
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38 end
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39
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40 function stanza_mt:add_child(child)
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41 if type(child) == "table" then
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42 t_insert(self.tags, child);
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43 end
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44 t_insert(self, child);
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45 end
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46
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47 function stanza_mt:child_with_name(name)
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48 for _, child in ipairs(self) do
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49 if child.name == name then return child; end
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50 end
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51 end
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52
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53 function stanza_mt:children()
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54 local i = 0;
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55 return function (a)
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56 i = i + 1
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57 local v = a[i]
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58 if v then return v; end
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59 end, self, i;
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60
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61 end
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62 function stanza_mt:childtags()
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63 local i = 0;
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64 return function (a)
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65 i = i + 1
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66 local v = self.tags[i]
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67 if v then return v; end
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68 end, self.tags[1], i;
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69
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70 end
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71
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72 do
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73 local xml_entities = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
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74 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
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75 end
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76
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77 local xml_escape = xml_escape;
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78
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79 function stanza_mt.__tostring(t)
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80 local children_text = "";
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81 for n, child in ipairs(t) do
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82 if type(child) == "string" then
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83 children_text = children_text .. xml_escape(child);
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84 else
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85 children_text = children_text .. tostring(child);
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86 end
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87 end
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88
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89 local attr_string = "";
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90 if t.attr then
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91 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
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92 end
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93
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94 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name);
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95 end
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96
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97 function stanza_mt.__add(s1, s2)
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98 return s1:add_child(s2);
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99 end
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100
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101
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102 do
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103 local id = 0;
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104 function new_id()
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105 id = id + 1;
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106 return "lx"..id;
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107 end
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108 end
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109
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110 function message(attr, body)
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111 if not body then
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112 return stanza("message", attr);
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113 else
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114 return stanza("message", attr):tag("body"):text(body);
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115 end
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116 end
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117 function iq(attr)
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118 if attr and not attr.id then attr.id = new_id(); end
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119 return stanza("iq", attr or { id = new_id() });
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120 end
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121
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122 function reply(orig)
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123 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) });
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124 end
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125
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126 function error_reply(orig, type, condition, message, clone)
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127 local t = reply(orig);
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128 t.attr.type = "error";
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129 -- TODO use clone
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130 t:tag("error", {type = type})
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131 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
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132 if (message) then t:tag("text"):text(message):up(); end
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133 return t; -- stanza ready for adding app-specific errors
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134 end
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135
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136 function presence(attr)
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137 return stanza("presence", attr);
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138 end
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139
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140 return _M;