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util/stanza.lua @ 4999:d5a3c5c1873c
mod_muc: Fix a couple of cases of 'forbidden' stanza error being sent with type 'cancel' - fixes #303
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 24 Jul 2012 10:44:37 +0100 |
parent | 4936:92c86e11fd44 |
child | 5090:61c7c53c06d5 |
rev | line source |
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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 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
6 -- COPYING file in the source package for more information. | |
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7 -- |
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8 |
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util.stanza: Don't add xmlns to tags when serializing if same as the parent tag's xmlns. Should hopefully shut up Gajim once and for all :)
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9 |
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10 local t_insert = table.insert; |
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11 local t_remove = table.remove; |
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12 local t_concat = table.concat; |
23 | 13 local s_format = string.format; |
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14 local s_match = string.match; |
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15 local tostring = tostring; |
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16 local setmetatable = setmetatable; |
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17 local pairs = pairs; |
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18 local ipairs = ipairs; |
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19 local type = type; |
4 | 20 local s_gsub = string.gsub; |
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21 local s_find = string.find; |
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22 local os = os; |
145 | 23 |
262 | 24 local do_pretty_printing = not os.getenv("WINDIR"); |
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25 local getstyle, getstring; |
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26 if do_pretty_printing then |
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27 local ok, termcolours = pcall(require, "util.termcolours"); |
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28 if ok then |
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29 getstyle, getstring = termcolours.getstyle, termcolours.getstring; |
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30 else |
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31 do_pretty_printing = nil; |
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32 end |
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33 end |
262 | 34 |
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35 local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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36 |
0 | 37 module "stanza" |
38 | |
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39 stanza_mt = { __type = "stanza" }; |
0 | 40 stanza_mt.__index = stanza_mt; |
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41 local stanza_mt = stanza_mt; |
0 | 42 |
43 function stanza(name, attr) | |
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44 local stanza = { name = name, attr = attr or {}, tags = {} }; |
0 | 45 return setmetatable(stanza, stanza_mt); |
46 end | |
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47 local stanza = stanza; |
0 | 48 |
49 function stanza_mt:query(xmlns) | |
50 return self:tag("query", { xmlns = xmlns }); | |
51 end | |
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52 |
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53 function stanza_mt:body(text, attr) |
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54 return self:tag("body", attr):text(text); |
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55 end |
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56 |
0 | 57 function stanza_mt:tag(name, attrs) |
58 local s = stanza(name, attrs); | |
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59 local last_add = self.last_add; |
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60 if not last_add then last_add = {}; self.last_add = last_add; end |
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61 (last_add[#last_add] or self):add_direct_child(s); |
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62 t_insert(last_add, s); |
0 | 63 return self; |
64 end | |
65 | |
66 function stanza_mt:text(text) | |
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67 local last_add = self.last_add; |
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68 (last_add and last_add[#last_add] or self):add_direct_child(text); |
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69 return self; |
0 | 70 end |
71 | |
72 function stanza_mt:up() | |
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73 local last_add = self.last_add; |
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74 if last_add then t_remove(last_add); end |
0 | 75 return self; |
76 end | |
77 | |
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78 function stanza_mt:reset() |
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79 self.last_add = nil; |
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80 return self; |
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81 end |
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82 |
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83 function stanza_mt:add_direct_child(child) |
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84 if type(child) == "table" then |
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85 t_insert(self.tags, child); |
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86 end |
0 | 87 t_insert(self, child); |
88 end | |
89 | |
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90 function stanza_mt:add_child(child) |
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91 local last_add = self.last_add; |
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92 (last_add and last_add[#last_add] or self):add_direct_child(child); |
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93 return self; |
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94 end |
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95 |
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96 function stanza_mt:get_child(name, xmlns) |
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97 for _, child in ipairs(self.tags) do |
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98 if (not name or child.name == name) |
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99 and ((not xmlns and self.attr.xmlns == child.attr.xmlns) |
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100 or child.attr.xmlns == xmlns) then |
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101 |
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102 return child; |
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103 end |
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104 end |
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105 end |
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106 |
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107 function stanza_mt:get_child_text(name, xmlns) |
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108 local tag = self:get_child(name, xmlns); |
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109 if tag then |
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110 return tag:get_text(); |
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111 end |
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112 return nil; |
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113 end |
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114 |
0 | 115 function stanza_mt:child_with_name(name) |
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116 for _, child in ipairs(self.tags) do |
0 | 117 if child.name == name then return child; end |
118 end | |
119 end | |
120 | |
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121 function stanza_mt:child_with_ns(ns) |
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122 for _, child in ipairs(self.tags) do |
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123 if child.attr.xmlns == ns then return child; end |
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124 end |
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125 end |
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126 |
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127 function stanza_mt:children() |
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128 local i = 0; |
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129 return function (a) |
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130 i = i + 1 |
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131 return a[i]; |
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132 end, self, i; |
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133 end |
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134 |
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135 function stanza_mt:childtags(name, xmlns) |
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136 local tags = self.tags; |
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137 local start_i, max_i = 1, #tags; |
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138 return function () |
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139 for i = start_i, max_i do |
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140 local v = tags[i]; |
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141 if (not name or v.name == name) |
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142 and ((not xmlns and self.attr.xmlns == v.attr.xmlns) |
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143 or v.attr.xmlns == xmlns) then |
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144 start_i = i+1; |
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145 return v; |
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146 end |
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147 end |
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148 end; |
2 | 149 end |
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150 |
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151 function stanza_mt:maptags(callback) |
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152 local tags, curr_tag = self.tags, 1; |
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153 local n_children, n_tags = #self, #tags; |
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154 |
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155 local i = 1; |
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156 while curr_tag <= n_tags do |
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157 if self[i] == tags[curr_tag] then |
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158 local ret = callback(self[i]); |
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159 if ret == nil then |
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160 t_remove(self, i); |
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161 t_remove(tags, curr_tag); |
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162 n_children = n_children - 1; |
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163 n_tags = n_tags - 1; |
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164 else |
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165 self[i] = ret; |
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166 tags[i] = ret; |
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167 end |
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168 i = i + 1; |
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169 curr_tag = curr_tag + 1; |
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170 end |
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171 end |
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172 return self; |
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173 end |
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174 |
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175 local xml_escape |
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176 do |
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177 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; |
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178 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end |
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179 _M.xml_escape = xml_escape; |
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180 end |
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181 |
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182 local function _dostring(t, buf, self, xml_escape, parentns) |
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183 local nsid = 0; |
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184 local name = t.name |
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185 t_insert(buf, "<"..name); |
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186 for k, v in pairs(t.attr) do |
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187 if s_find(k, "\1", 1, true) then |
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188 local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$"); |
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189 nsid = nsid + 1; |
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190 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'"); |
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191 elseif not(k == "xmlns" and v == parentns) then |
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192 t_insert(buf, " "..k.."='"..xml_escape(v).."'"); |
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193 end |
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194 end |
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195 local len = #t; |
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196 if len == 0 then |
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197 t_insert(buf, "/>"); |
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198 else |
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199 t_insert(buf, ">"); |
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200 for n=1,len do |
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201 local child = t[n]; |
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202 if child.name then |
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203 self(child, buf, self, xml_escape, t.attr.xmlns); |
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204 else |
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205 t_insert(buf, xml_escape(child)); |
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206 end |
4 | 207 end |
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208 t_insert(buf, "</"..name..">"); |
0 | 209 end |
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210 end |
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211 function stanza_mt.__tostring(t) |
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212 local buf = {}; |
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213 _dostring(t, buf, _dostring, xml_escape, nil); |
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214 return t_concat(buf); |
0 | 215 end |
216 | |
242
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217 function stanza_mt.top_tag(t) |
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218 local attr_string = ""; |
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219 if t.attr then |
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220 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 |
242
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221 end |
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222 return s_format("<%s%s>", t.name, attr_string); |
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223 end |
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224 |
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225 function stanza_mt.get_text(t) |
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226 if #t.tags == 0 then |
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227 return t_concat(t); |
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228 end |
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229 end |
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230 |
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231 function stanza_mt.get_error(stanza) |
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232 local type, condition, text; |
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233 |
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234 local error_tag = stanza:get_child("error"); |
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235 if not error_tag then |
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236 return nil, nil, nil; |
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237 end |
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238 type = error_tag.attr.type; |
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239 |
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240 for child in error_tag:childtags() do |
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241 if child.attr.xmlns == xmlns_stanzas then |
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242 if not text and child.name == "text" then |
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243 text = child:get_text(); |
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244 elseif not condition then |
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245 condition = child.name; |
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246 end |
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247 if condition and text then |
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248 break; |
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249 end |
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250 end |
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251 end |
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252 return type, condition or "undefined-condition", text; |
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253 end |
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254 |
0 | 255 do |
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256 local id = 0; |
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257 function new_id() |
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258 id = id + 1; |
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259 return "lx"..id; |
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260 end |
0 | 261 end |
262 | |
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263 function preserialize(stanza) |
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264 local s = { name = stanza.name, attr = stanza.attr }; |
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265 for _, child in ipairs(stanza) do |
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266 if type(child) == "table" then |
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267 t_insert(s, preserialize(child)); |
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268 else |
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269 t_insert(s, child); |
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270 end |
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271 end |
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272 return s; |
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273 end |
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274 |
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275 function deserialize(stanza) |
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276 -- Set metatable |
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277 if stanza then |
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278 local attr = stanza.attr; |
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279 for i=1,#attr do attr[i] = nil; end |
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280 local attrx = {}; |
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281 for att in pairs(attr) do |
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282 if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then |
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283 local ns,na = s_match(att, "^([^|]+)|(.+)$"); |
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284 attrx[ns.."\1"..na] = attr[att]; |
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285 attr[att] = nil; |
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286 end |
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287 end |
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288 for a,v in pairs(attrx) do |
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289 attr[a] = v; |
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290 end |
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291 setmetatable(stanza, stanza_mt); |
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292 for _, child in ipairs(stanza) do |
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293 if type(child) == "table" then |
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294 deserialize(child); |
90
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295 end |
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296 end |
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297 if not stanza.tags then |
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298 -- Rebuild tags |
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299 local tags = {}; |
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300 for _, child in ipairs(stanza) do |
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301 if type(child) == "table" then |
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302 t_insert(tags, child); |
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303 end |
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304 end |
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305 stanza.tags = tags; |
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306 end |
90
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307 end |
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308 |
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309 return stanza; |
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310 end |
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311 |
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312 local function _clone(stanza) |
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313 local attr, tags = {}, {}; |
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314 for k,v in pairs(stanza.attr) do attr[k] = v; end |
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315 local new = { name = stanza.name, attr = attr, tags = tags }; |
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316 for i=1,#stanza do |
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317 local child = stanza[i]; |
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318 if child.name then |
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319 child = _clone(child); |
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320 t_insert(tags, child); |
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321 end |
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322 t_insert(new, child); |
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323 end |
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324 return setmetatable(new, stanza_mt); |
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325 end |
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326 clone = _clone; |
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327 |
0 | 328 function message(attr, body) |
329 if not body then | |
330 return stanza("message", attr); | |
331 else | |
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332 return stanza("message", attr):tag("body"):text(body):up(); |
0 | 333 end |
334 end | |
335 function iq(attr) | |
336 if attr and not attr.id then attr.id = new_id(); end | |
337 return stanza("iq", attr or { id = new_id() }); | |
338 end | |
339 | |
340 function reply(orig) | |
209
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341 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) }); |
0 | 342 end |
343 | |
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344 do |
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345 local xmpp_stanzas_attr = { xmlns = xmlns_stanzas }; |
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346 function error_reply(orig, type, condition, message) |
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347 local t = reply(orig); |
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348 t.attr.type = "error"; |
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349 t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here |
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350 :tag(condition, xmpp_stanzas_attr):up(); |
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351 if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end |
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352 return t; -- stanza ready for adding app-specific errors |
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353 end |
60
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354 end |
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355 |
0 | 356 function presence(attr) |
357 return stanza("presence", attr); | |
358 end | |
359 | |
262 | 360 if do_pretty_printing then |
361 local style_attrk = getstyle("yellow"); | |
362 local style_attrv = getstyle("red"); | |
363 local style_tagname = getstyle("red"); | |
364 local style_punc = getstyle("magenta"); | |
365 | |
366 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
367 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
368 --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, ">"); | |
369 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
370 function stanza_mt.pretty_print(t) | |
371 local children_text = ""; | |
372 for n, child in ipairs(t) do | |
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373 if type(child) == "string" then |
262 | 374 children_text = children_text .. xml_escape(child); |
375 else | |
376 children_text = children_text .. child:pretty_print(); | |
377 end | |
378 end | |
379 | |
380 local attr_string = ""; | |
381 if t.attr then | |
382 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 | |
383 end | |
384 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
385 end | |
386 | |
387 function stanza_mt.pretty_top_tag(t) | |
388 local attr_string = ""; | |
389 if t.attr then | |
390 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 | |
391 end | |
392 return s_format(top_tag_format, t.name, attr_string); | |
393 end | |
394 else | |
395 -- Sorry, fresh out of colours for you guys ;) | |
396 stanza_mt.pretty_print = stanza_mt.__tostring; | |
397 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
398 end | |
399 | |
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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>
parents:
70
diff
changeset
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400 return _M; |