prosody
da468ed49a7b
util/stanza.lua

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util/stanza.lua @ 90:da468ed49a7b

Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
author Matthew Wild <mwild1@gmail.com>
date Thu, 09 Oct 2008 00:50:45 +0100
parent 70:a6c00467a3f8
child 91:6d66eb6b24cb
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rev   line source
1
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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 unpack = unpack;
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10 local s_gsub = string.gsub;
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11 module "stanza"
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12
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13 stanza_mt = {};
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14 stanza_mt.__index = stanza_mt;
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15
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16 function stanza(name, attr)
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17 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
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18 return setmetatable(stanza, stanza_mt);
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19 end
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20
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21 function stanza_mt:query(xmlns)
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22 return self:tag("query", { xmlns = xmlns });
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23 end
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24 function stanza_mt:tag(name, attrs)
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25 local s = stanza(name, attrs);
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26 (self.last_add[#self.last_add] or self):add_child(s);
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27 t_insert(self.last_add, s);
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28 return self;
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29 end
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30
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31 function stanza_mt:text(text)
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32 (self.last_add[#self.last_add] or self):add_child(text);
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33 return self;
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34 end
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35
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36 function stanza_mt:up()
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37 t_remove(self.last_add);
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38 return self;
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39 end
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40
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41 function stanza_mt:add_child(child)
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42 if type(child) == "table" then
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43 t_insert(self.tags, child);
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44 end
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45 t_insert(self, child);
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46 end
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47
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48 function stanza_mt:child_with_name(name)
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49 for _, child in ipairs(self) do
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50 if child.name == name then return child; end
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51 end
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52 end
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53
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54 function stanza_mt:children()
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55 local i = 0;
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56 return function (a)
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57 i = i + 1
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58 local v = a[i]
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59 if v then return v; end
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60 end, self, i;
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61
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62 end
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63 function stanza_mt:childtags()
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64 local i = 0;
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65 return function (a)
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66 i = i + 1
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67 local v = self.tags[i]
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68 if v then return v; end
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69 end, self.tags[1], i;
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70
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71 end
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72
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73 do
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74 local xml_entities = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
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75 function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
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76 end
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77
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78 local xml_escape = xml_escape;
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79
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80 function stanza_mt.__tostring(t)
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81 local children_text = "";
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82 for n, child in ipairs(t) do
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83 if type(child) == "string" then
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84 children_text = children_text .. xml_escape(child);
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85 else
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86 children_text = children_text .. tostring(child);
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87 end
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88 end
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89
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90 local attr_string = "";
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91 if t.attr then
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92 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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93 end
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94
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95 return s_format("<%s%s>%s</%s>", t.name, attr_string, children_text, t.name);
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96 end
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97
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98 function stanza_mt.__add(s1, s2)
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99 return s1:add_child(s2);
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100 end
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101
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102
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103 do
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104 local id = 0;
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105 function new_id()
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106 id = id + 1;
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107 return "lx"..id;
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108 end
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109 end
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110
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111 function preserialize(stanza)
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112 local s = { name = stanza.name, attr = stanza.attr };
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113 for _, child in ipairs(stanza) do
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114 if type(child) == "table" then
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115 t_insert(s, preserialize(child));
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116 else
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117 t_insert(s, child);
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118 end
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119 end
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120 return s;
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121 end
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122
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123 function deserialize(stanza)
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124 -- Set metatable
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125 setmetatable(stanza, stanza_mt);
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126 for _, child in ipairs(stanza) do
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127 if type(child) == "table" then
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128 deserialize(child);
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129 end
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130 end
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131 if not stanza.tags then
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132 -- Rebuild tags
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133 local tags = {};
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134 for _, child in ipairs(stanza) do
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135 if type(child) == "table" then
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136 t_insert(tags, child);
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137 end
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138 end
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139 stanza.tags = tags;
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140 end
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141
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142 return stanza;
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143 end
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144
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145 function message(attr, body)
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146 if not body then
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147 return stanza("message", attr);
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148 else
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149 return stanza("message", attr):tag("body"):text(body);
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150 end
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151 end
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152 function iq(attr)
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153 if attr and not attr.id then attr.id = new_id(); end
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154 return stanza("iq", attr or { id = new_id() });
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155 end
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156
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157 function reply(orig)
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158 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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159 end
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160
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161 function error_reply(orig, type, condition, message, clone)
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a6c00467a3f8 Fixed typo in variable name
Waqas Hussain <waqas20@gmail.com>
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162 local t = reply(orig);
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44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
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163 t.attr.type = "error";
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
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164 -- TODO use clone
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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165 t:tag("error", {type = type})
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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166 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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167 if (message) then t:tag("text"):text(message):up(); end
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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168 return t; -- stanza ready for adding app-specific errors
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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169 end
44800be871f5 User registration, etc (jabber:iq:register)
Waqas Hussain <waqas20@gmail.com>
parents: 30
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170
0
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
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171 function presence(attr)
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matthew
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172 return stanza("presence", attr);
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
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173 end
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
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174
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da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
Matthew Wild <mwild1@gmail.com>
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175 return _M;