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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 |
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10 local t_insert = table.insert; |
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11 local t_concat = table.concat; |
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12 local t_remove = table.remove; |
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13 local t_concat = table.concat; |
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14 local s_format = string.format; |
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15 local s_match = string.match; |
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16 local tostring = tostring; |
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17 local setmetatable = setmetatable; |
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18 local getmetatable = getmetatable; |
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19 local pairs = pairs; |
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20 local ipairs = ipairs; |
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21 local type = type; |
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22 local next = next; |
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23 local print = print; |
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24 local unpack = unpack; |
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25 local s_gsub = string.gsub; |
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26 local s_char = string.char; |
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27 local s_find = string.find; |
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28 local os = os; |
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29 |
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30 local do_pretty_printing = not os.getenv("WINDIR"); |
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31 local getstyle, getstring; |
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32 if do_pretty_printing then |
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33 local ok, termcolours = pcall(require, "util.termcolours"); |
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34 if ok then |
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35 getstyle, getstring = termcolours.getstyle, termcolours.getstring; |
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36 else |
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37 do_pretty_printing = nil; |
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38 end |
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39 end |
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40 |
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41 local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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42 |
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43 module "stanza" |
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44 |
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45 stanza_mt = { __type = "stanza" }; |
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46 stanza_mt.__index = stanza_mt; |
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47 |
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48 function stanza(name, attr) |
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49 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
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50 return setmetatable(stanza, stanza_mt); |
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51 end |
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52 |
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53 function stanza_mt:query(xmlns) |
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54 return self:tag("query", { xmlns = xmlns }); |
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55 end |
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56 |
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57 function stanza_mt:body(text, attr) |
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58 return self:tag("body", attr):text(text); |
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59 end |
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60 |
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61 function stanza_mt:tag(name, attrs) |
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62 local s = stanza(name, attrs); |
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63 (self.last_add[#self.last_add] or self):add_direct_child(s); |
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64 t_insert(self.last_add, s); |
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65 return self; |
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66 end |
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67 |
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68 function stanza_mt:text(text) |
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69 (self.last_add[#self.last_add] or self):add_direct_child(text); |
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70 return self; |
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71 end |
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72 |
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73 function stanza_mt:up() |
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74 t_remove(self.last_add); |
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75 return self; |
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76 end |
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77 |
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78 function stanza_mt:reset() |
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79 local last_add = self.last_add; |
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80 for i = 1,#last_add do |
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81 last_add[i] = nil; |
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82 end |
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83 return self; |
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84 end |
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85 |
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86 function stanza_mt:add_direct_child(child) |
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87 if type(child) == "table" then |
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88 t_insert(self.tags, child); |
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89 end |
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90 t_insert(self, child); |
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91 end |
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92 |
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93 function stanza_mt:add_child(child) |
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94 (self.last_add[#self.last_add] or self):add_direct_child(child); |
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95 return self; |
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96 end |
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97 |
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98 function stanza_mt:get_child(name, xmlns) |
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99 for _, child in ipairs(self.tags) do |
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100 if (not name or child.name == name) |
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101 and ((not xmlns and self.attr.xmlns == child.attr.xmlns) |
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102 or child.attr.xmlns == xmlns) then |
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103 |
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104 return child; |
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105 end |
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106 end |
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107 end |
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108 |
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109 function stanza_mt:child_with_name(name) |
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110 for _, child in ipairs(self.tags) do |
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111 if child.name == name then return child; end |
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112 end |
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113 end |
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114 |
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115 function stanza_mt:child_with_ns(ns) |
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116 for _, child in ipairs(self.tags) do |
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117 if child.attr.xmlns == ns then return child; end |
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118 end |
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119 end |
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120 |
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121 function stanza_mt:children() |
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122 local i = 0; |
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123 return function (a) |
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124 i = i + 1 |
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125 local v = a[i] |
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126 if v then return v; end |
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127 end, self, i; |
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128 end |
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129 function stanza_mt:childtags() |
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130 local i = 0; |
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131 return function (a) |
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132 i = i + 1 |
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133 local v = self.tags[i] |
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134 if v then return v; end |
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135 end, self.tags[1], i; |
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136 end |
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137 |
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138 local xml_escape |
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139 do |
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140 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; |
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141 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end |
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142 _M.xml_escape = xml_escape; |
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143 end |
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144 |
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145 local function _dostring(t, buf, self, xml_escape, parentns) |
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146 local nsid = 0; |
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147 local name = t.name |
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148 t_insert(buf, "<"..name); |
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149 for k, v in pairs(t.attr) do |
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150 if s_find(k, "\1", 1, true) then |
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151 local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$"); |
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152 nsid = nsid + 1; |
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153 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'"); |
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154 elseif not(k == "xmlns" and v == parentns) then |
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155 t_insert(buf, " "..k.."='"..xml_escape(v).."'"); |
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156 end |
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157 end |
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158 local len = #t; |
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159 if len == 0 then |
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160 t_insert(buf, "/>"); |
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161 else |
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162 t_insert(buf, ">"); |
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163 for n=1,len do |
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164 local child = t[n]; |
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165 if child.name then |
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166 self(child, buf, self, xml_escape, t.attr.xmlns); |
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167 else |
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168 t_insert(buf, xml_escape(child)); |
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169 end |
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170 end |
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171 t_insert(buf, "</"..name..">"); |
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172 end |
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173 end |
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174 function stanza_mt.__tostring(t) |
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175 local buf = {}; |
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176 _dostring(t, buf, _dostring, xml_escape, nil); |
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177 return t_concat(buf); |
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178 end |
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179 |
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180 function stanza_mt.top_tag(t) |
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181 local attr_string = ""; |
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182 if t.attr then |
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183 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, xml_escape(tostring(v))); end end |
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184 end |
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185 return s_format("<%s%s>", t.name, attr_string); |
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186 end |
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187 |
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188 function stanza_mt.get_text(t) |
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189 if #t.tags == 0 then |
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190 return t_concat(t); |
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191 end |
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192 end |
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193 |
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194 function stanza_mt.get_error(stanza) |
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195 local type, condition, text; |
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196 |
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197 local error_tag = stanza:get_child("error"); |
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198 if not error_tag then |
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199 return nil, nil, nil; |
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200 end |
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201 type = error_tag.attr.type; |
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202 |
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203 for child in error_tag:children() do |
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204 if child.attr.xmlns == xmlns_stanzas then |
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205 if not text and child.name == "text" then |
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206 text = child:get_text(); |
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207 elseif not condition then |
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208 condition = child.name; |
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209 end |
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210 if condition and text then |
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211 break; |
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212 end |
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213 end |
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214 end |
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215 return type, condition or "undefined-condition", text or ""; |
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216 end |
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217 |
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218 function stanza_mt.__add(s1, s2) |
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219 return s1:add_direct_child(s2); |
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220 end |
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221 |
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222 |
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223 do |
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224 local id = 0; |
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225 function new_id() |
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226 id = id + 1; |
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227 return "lx"..id; |
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228 end |
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229 end |
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230 |
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231 function preserialize(stanza) |
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232 local s = { name = stanza.name, attr = stanza.attr }; |
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233 for _, child in ipairs(stanza) do |
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234 if type(child) == "table" then |
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235 t_insert(s, preserialize(child)); |
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236 else |
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237 t_insert(s, child); |
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238 end |
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239 end |
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240 return s; |
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241 end |
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242 |
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243 function deserialize(stanza) |
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244 -- Set metatable |
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245 if stanza then |
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246 local attr = stanza.attr; |
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247 for i=1,#attr do attr[i] = nil; end |
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248 local attrx = {}; |
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249 for att in pairs(attr) do |
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250 if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then |
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251 local ns,na = s_match(att, "^([^|]+)|(.+)$"); |
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252 attrx[ns.."\1"..na] = attr[att]; |
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253 attr[att] = nil; |
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254 end |
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255 end |
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256 for a,v in pairs(attrx) do |
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257 attr[a] = v; |
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258 end |
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259 setmetatable(stanza, stanza_mt); |
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260 for _, child in ipairs(stanza) do |
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261 if type(child) == "table" then |
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262 deserialize(child); |
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263 end |
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264 end |
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265 if not stanza.tags then |
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266 -- Rebuild tags |
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267 local tags = {}; |
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268 for _, child in ipairs(stanza) do |
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269 if type(child) == "table" then |
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270 t_insert(tags, child); |
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271 end |
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272 end |
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273 stanza.tags = tags; |
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274 if not stanza.last_add then |
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275 stanza.last_add = {}; |
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276 end |
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277 end |
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278 end |
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279 |
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280 return stanza; |
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281 end |
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282 |
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283 function clone(stanza) |
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284 local lookup_table = {}; |
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285 local function _copy(object) |
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286 if type(object) ~= "table" then |
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287 return object; |
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288 elseif lookup_table[object] then |
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289 return lookup_table[object]; |
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290 end |
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291 local new_table = {}; |
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292 lookup_table[object] = new_table; |
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293 for index, value in pairs(object) do |
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294 new_table[_copy(index)] = _copy(value); |
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295 end |
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296 return setmetatable(new_table, getmetatable(object)); |
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297 end |
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298 |
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299 return _copy(stanza) |
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300 end |
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301 |
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302 function message(attr, body) |
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303 if not body then |
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304 return stanza("message", attr); |
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305 else |
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306 return stanza("message", attr):tag("body"):text(body); |
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307 end |
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308 end |
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309 function iq(attr) |
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310 if attr and not attr.id then attr.id = new_id(); end |
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311 return stanza("iq", attr or { id = new_id() }); |
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312 end |
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313 |
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314 function reply(orig) |
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315 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 orig.attr.type) }); |
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316 end |
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317 |
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318 do |
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319 local xmpp_stanzas_attr = { xmlns = xmlns_stanzas }; |
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320 function error_reply(orig, type, condition, message) |
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321 local t = reply(orig); |
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322 t.attr.type = "error"; |
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323 t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here |
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324 :tag(condition, xmpp_stanzas_attr):up(); |
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325 if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end |
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326 return t; -- stanza ready for adding app-specific errors |
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327 end |
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328 end |
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329 |
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330 function presence(attr) |
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331 return stanza("presence", attr); |
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332 end |
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333 |
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334 if do_pretty_printing then |
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335 local style_attrk = getstyle("yellow"); |
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336 local style_attrv = getstyle("red"); |
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337 local style_tagname = getstyle("red"); |
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338 local style_punc = getstyle("magenta"); |
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339 |
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340 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); |
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341 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); |
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342 --local tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">").."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); |
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343 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); |
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344 function stanza_mt.pretty_print(t) |
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345 local children_text = ""; |
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346 for n, child in ipairs(t) do |
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347 if type(child) == "string" then |
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348 children_text = children_text .. xml_escape(child); |
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349 else |
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350 children_text = children_text .. child:pretty_print(); |
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351 end |
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352 end |
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353 |
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354 local attr_string = ""; |
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355 if t.attr then |
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356 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end |
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357 end |
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358 return s_format(tag_format, t.name, attr_string, children_text, t.name); |
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359 end |
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360 |
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361 function stanza_mt.pretty_top_tag(t) |
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362 local attr_string = ""; |
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363 if t.attr then |
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364 for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end |
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365 end |
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366 return s_format(top_tag_format, t.name, attr_string); |
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367 end |
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368 else |
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369 -- Sorry, fresh out of colours for you guys ;) |
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370 stanza_mt.pretty_print = stanza_mt.__tostring; |
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371 stanza_mt.pretty_top_tag = stanza_mt.top_tag; |
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372 end |
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373 |
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374 return _M; |