prosody
40792c18a8e4
util/stanza.lua

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util/stanza.lua @ 1998:40792c18a8e4

MUC: Ignore invisible presence (incorrectly broadcasted or forwarded by ejabberd).
author Waqas Hussain <waqas20@gmail.com>
date Sun, 18 Oct 2009 05:54:14 +0500
parent 1984:f2b1f89e1d7c
child 2077:e33658f6052c
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rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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 module "stanza"
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42
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43 stanza_mt = { __type = "stanza" };
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44 stanza_mt.__index = stanza_mt;
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45
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46 function stanza(name, attr)
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47 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}};
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48 return setmetatable(stanza, stanza_mt);
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49 end
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50
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51 function stanza_mt:query(xmlns)
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52 return self:tag("query", { xmlns = xmlns });
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53 end
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54
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55 function stanza_mt:body(text, attr)
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56 return self:tag("body", attr):text(text);
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57 end
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58
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59 function stanza_mt:tag(name, attrs)
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60 local s = stanza(name, attrs);
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61 (self.last_add[#self.last_add] or self):add_direct_child(s);
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62 t_insert(self.last_add, s);
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63 return self;
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64 end
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65
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66 function stanza_mt:text(text)
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67 (self.last_add[#self.last_add] or self):add_direct_child(text);
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68 return self;
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69 end
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70
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71 function stanza_mt:up()
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72 t_remove(self.last_add);
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73 return self;
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74 end
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75
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76 function stanza_mt:reset()
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77 local last_add = self.last_add;
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78 for i = 1,#last_add do
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79 last_add[i] = nil;
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80 end
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81 return self;
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82 end
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83
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84 function stanza_mt:add_direct_child(child)
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85 if type(child) == "table" then
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86 t_insert(self.tags, child);
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87 end
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88 t_insert(self, child);
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89 end
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90
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91 function stanza_mt:add_child(child)
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92 (self.last_add[#self.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:child_with_name(name)
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97 for _, child in ipairs(self.tags) do
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98 if child.name == name then return child; end
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99 end
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100 end
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101
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102 function stanza_mt:child_with_ns(ns)
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103 for _, child in ipairs(self.tags) do
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104 if child.attr.xmlns == ns then return child; end
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105 end
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106 end
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107
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108 function stanza_mt:children()
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109 local i = 0;
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110 return function (a)
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111 i = i + 1
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112 local v = a[i]
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113 if v then return v; end
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114 end, self, i;
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115
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116 end
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117 function stanza_mt:childtags()
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118 local i = 0;
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119 return function (a)
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120 i = i + 1
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121 local v = self.tags[i]
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122 if v then return v; end
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123 end, self.tags[1], i;
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124
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125 end
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126
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127 local xml_escape
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128 do
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129 local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
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130 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
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131 _M.xml_escape = xml_escape;
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132 end
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133
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134 local function _dostring(t, buf, self, xml_escape, parentns)
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135 local nsid = 0;
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136 local name = t.name
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137 t_insert(buf, "<"..name);
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138 for k, v in pairs(t.attr) do
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139 if s_find(k, "|", 1, true) then
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140 local ns, attrk = s_match(k, "^([^|]+)|(.+)$");
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141 nsid = nsid + 1;
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142 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
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143 elseif not(k == "xmlns" and v == parentns) then
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144 t_insert(buf, " "..k.."='"..xml_escape(v).."'");
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145 end
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parents: 1415
diff changeset
146 end
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147 local len = #t;
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parents: 1420
diff changeset
148 if len == 0 then
9fe9ba693f4a util.stanza: Serializer optimizations, and nicer output for empty elements
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parents: 1420
diff changeset
149 t_insert(buf, "/>");
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parents: 1420
diff changeset
150 else
9fe9ba693f4a util.stanza: Serializer optimizations, and nicer output for empty elements
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parents: 1420
diff changeset
151 t_insert(buf, ">");
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parents: 1420
diff changeset
152 for n=1,len do
9fe9ba693f4a util.stanza: Serializer optimizations, and nicer output for empty elements
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parents: 1420
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153 local child = t[n];
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parents: 1420
diff changeset
154 if child.name then
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f2b1f89e1d7c 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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parents: 1935
diff changeset
155 self(child, buf, self, xml_escape, t.attr.xmlns);
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parents: 1420
diff changeset
156 else
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157 t_insert(buf, xml_escape(child));
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parents: 1420
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158 end
4
09c3845ed442 Presence unavailable on disconnect
matthew
parents: 2
diff changeset
159 end
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parents: 1420
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160 t_insert(buf, "</"..name..">");
0
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161 end
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parents: 519
diff changeset
162 end
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parents: 519
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163 function stanza_mt.__tostring(t)
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parents: 519
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164 local buf = {};
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parents: 1935
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165 _dostring(t, buf, _dostring, xml_escape, nil);
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parents: 519
diff changeset
166 return t_concat(buf);
0
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167 end
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
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168
242
f15afbcbc55c Add new top_tag() method to stanzas
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parents: 209
diff changeset
169 function stanza_mt.top_tag(t)
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parents: 209
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170 local attr_string = "";
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parents: 209
diff changeset
171 if t.attr then
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parents: 262
diff changeset
172 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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parents: 209
diff changeset
173 end
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parents: 209
diff changeset
174 return s_format("<%s%s>", t.name, attr_string);
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parents: 209
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175 end
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parents: 209
diff changeset
176
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parents: 1416
diff changeset
177 function stanza_mt.get_text(t)
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parents: 1416
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178 if #t.tags == 0 then
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parents: 1416
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179 return t_concat(t);
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parents: 1416
diff changeset
180 end
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parents: 1416
diff changeset
181 end
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parents: 1416
diff changeset
182
0
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parents:
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183 function stanza_mt.__add(s1, s2)
180
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parents: 145
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184 return s1:add_direct_child(s2);
0
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parents:
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185 end
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186
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parents:
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187
3e3171b59028 First commit, where do you want to go tomorrow?
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188 do
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189 local id = 0;
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parents: 1431
diff changeset
190 function new_id()
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parents: 1431
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191 id = id + 1;
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192 return "lx"..id;
22be7637a64d util.stanza: Convert spaces to tabs
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parents: 1431
diff changeset
193 end
0
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parents:
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194 end
3e3171b59028 First commit, where do you want to go tomorrow?
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parents:
diff changeset
195
90
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
diff changeset
196 function preserialize(stanza)
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parents: 70
diff changeset
197 local s = { name = stanza.name, attr = stanza.attr };
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
diff changeset
198 for _, child in ipairs(stanza) do
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parents: 70
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199 if type(child) == "table" then
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parents: 70
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200 t_insert(s, preserialize(child));
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parents: 70
diff changeset
201 else
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parents: 70
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202 t_insert(s, child);
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
diff changeset
203 end
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parents: 70
diff changeset
204 end
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents: 70
diff changeset
205 return s;
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parents: 70
diff changeset
206 end
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parents: 70
diff changeset
207
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parents: 70
diff changeset
208 function deserialize(stanza)
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parents: 70
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209 -- Set metatable
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parents: 90
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210 if stanza then
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211 local attr = stanza.attr;
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parents: 1151
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212 for i=1,#attr do attr[i] = nil; end
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parents: 90
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213 setmetatable(stanza, stanza_mt);
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parents: 70
diff changeset
214 for _, child in ipairs(stanza) do
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parents: 70
diff changeset
215 if type(child) == "table" then
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parents: 90
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216 deserialize(child);
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parents: 70
diff changeset
217 end
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parents: 70
diff changeset
218 end
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parents: 90
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219 if not stanza.tags then
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parents: 90
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220 -- Rebuild tags
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221 local tags = {};
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parents: 90
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222 for _, child in ipairs(stanza) do
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parents: 90
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223 if type(child) == "table" then
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parents: 90
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224 t_insert(tags, child);
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parents: 90
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225 end
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parents: 90
diff changeset
226 end
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parents: 90
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227 stanza.tags = tags;
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parents: 627
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228 if not stanza.last_add then
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parents: 627
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229 stanza.last_add = {};
734994b61907 Restore fix for missing last_add on deserialized stanzas. Thanks to tsing for discovering.
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parents: 627
diff changeset
230 end
91
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parents: 90
diff changeset
231 end
90
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parents: 70
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232 end
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parents: 70
diff changeset
233
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parents: 70
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234 return stanza;
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parents: 70
diff changeset
235 end
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parents: 70
diff changeset
236
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237 function clone(stanza)
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238 local lookup_table = {};
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239 local function _copy(object)
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240 if type(object) ~= "table" then
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241 return object;
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parents: 1431
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242 elseif lookup_table[object] then
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243 return lookup_table[object];
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244 end
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245 local new_table = {};
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246 lookup_table[object] = new_table;
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247 for index, value in pairs(object) do
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248 new_table[_copy(index)] = _copy(value);
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249 end
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parents: 1431
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250 return setmetatable(new_table, getmetatable(object));
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parents: 1431
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251 end
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parents: 1431
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252
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253 return _copy(stanza)
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parents: 776
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254 end
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255
0
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diff changeset
256 function message(attr, body)
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257 if not body then
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258 return stanza("message", attr);
3e3171b59028 First commit, where do you want to go tomorrow?
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259 else
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260 return stanza("message", attr):tag("body"):text(body);
3e3171b59028 First commit, where do you want to go tomorrow?
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261 end
3e3171b59028 First commit, where do you want to go tomorrow?
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262 end
3e3171b59028 First commit, where do you want to go tomorrow?
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263 function iq(attr)
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
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264 if attr and not attr.id then attr.id = new_id(); end
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265 return stanza("iq", attr or { id = new_id() });
3e3171b59028 First commit, where do you want to go tomorrow?
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266 end
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267
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268 function reply(orig)
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269 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
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270 end
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271
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272 function error_reply(orig, type, condition, message)
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parents: 62
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273 local t = reply(orig);
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parents: 30
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274 t.attr.type = "error";
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parents: 30
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275 t:tag("error", {type = type})
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parents: 30
diff changeset
276 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
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parents: 30
diff changeset
277 if (message) then t:tag("text"):text(message):up(); end
44800be871f5 User registration, etc (jabber:iq:register)
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parents: 30
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278 return t; -- stanza ready for adding app-specific errors
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parents: 30
diff changeset
279 end
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parents: 30
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280
0
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281 function presence(attr)
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282 return stanza("presence", attr);
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283 end
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284
262
8c73fb2ff4a2 A treat for Linux users ;)
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285 if do_pretty_printing then
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286 local style_attrk = getstyle("yellow");
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287 local style_attrv = getstyle("red");
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288 local style_tagname = getstyle("red");
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289 local style_punc = getstyle("magenta");
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290
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291 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
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292 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
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293 --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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294 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
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295 function stanza_mt.pretty_print(t)
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296 local children_text = "";
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297 for n, child in ipairs(t) do
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298 if type(child) == "string" then
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299 children_text = children_text .. xml_escape(child);
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300 else
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301 children_text = children_text .. child:pretty_print();
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302 end
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303 end
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304
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305 local attr_string = "";
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306 if t.attr then
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307 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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308 end
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309 return s_format(tag_format, t.name, attr_string, children_text, t.name);
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310 end
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311
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312 function stanza_mt.pretty_top_tag(t)
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313 local attr_string = "";
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314 if t.attr then
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315 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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316 end
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317 return s_format(top_tag_format, t.name, attr_string);
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318 end
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319 else
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320 -- Sorry, fresh out of colours for you guys ;)
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321 stanza_mt.pretty_print = stanza_mt.__tostring;
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322 stanza_mt.pretty_top_tag = stanza_mt.top_tag;
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323 end
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324
90
da468ed49a7b Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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325 return _M;