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util/stanza.lua @ 3980:6b2fac6602b3
mod_storage_sql: Use util.json instead of util.serialization.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Mon, 27 Dec 2010 19:43:57 +0500 |
parent | 3766:0d7137fee360 |
child | 4132:ccc16434dbe2 |
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_concat = table.concat; |
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12 local t_remove = table.remove; |
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13 local t_concat = table.concat; |
23 | 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; |
145 | 22 local next = next; |
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23 local print = print; |
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Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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24 local unpack = unpack; |
4 | 25 local s_gsub = string.gsub; |
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util.stanza: Rewrote stanza_mt.__tostring. 20-30% faster stanza serialization. - #optimization
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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; |
145 | 29 |
262 | 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 |
262 | 40 |
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41 local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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42 |
0 | 43 module "stanza" |
44 | |
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45 stanza_mt = { __type = "stanza" }; |
0 | 46 stanza_mt.__index = stanza_mt; |
47 | |
48 function stanza(name, attr) | |
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49 local stanza = { name = name, attr = attr or {}, tags = {} }; |
0 | 50 return setmetatable(stanza, stanza_mt); |
51 end | |
52 | |
53 function stanza_mt:query(xmlns) | |
54 return self:tag("query", { xmlns = xmlns }); | |
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 |
0 | 61 function stanza_mt:tag(name, attrs) |
62 local s = stanza(name, attrs); | |
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63 local last_add = self.last_add; |
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64 if not last_add then last_add = {}; self.last_add = last_add; end |
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65 (last_add[#last_add] or self):add_direct_child(s); |
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66 t_insert(last_add, s); |
0 | 67 return self; |
68 end | |
69 | |
70 function stanza_mt:text(text) | |
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71 local last_add = self.last_add; |
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72 (last_add and last_add[#last_add] or self):add_direct_child(text); |
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73 return self; |
0 | 74 end |
75 | |
76 function stanza_mt:up() | |
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77 local last_add = self.last_add; |
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78 if last_add then t_remove(last_add); end |
0 | 79 return self; |
80 end | |
81 | |
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82 function stanza_mt:reset() |
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83 self.last_add = nil; |
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84 return self; |
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85 end |
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86 |
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87 function stanza_mt:add_direct_child(child) |
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88 if type(child) == "table" then |
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89 t_insert(self.tags, child); |
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90 end |
0 | 91 t_insert(self, child); |
92 end | |
93 | |
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94 function stanza_mt:add_child(child) |
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95 local last_add = self.last_add; |
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96 (last_add and last_add[#last_add] or self):add_direct_child(child); |
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97 return self; |
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98 end |
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99 |
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100 function stanza_mt:get_child(name, xmlns) |
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101 for _, child in ipairs(self.tags) do |
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102 if (not name or child.name == name) |
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103 and ((not xmlns and self.attr.xmlns == child.attr.xmlns) |
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104 or child.attr.xmlns == xmlns) then |
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105 |
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106 return child; |
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107 end |
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108 end |
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109 end |
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110 |
0 | 111 function stanza_mt:child_with_name(name) |
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112 for _, child in ipairs(self.tags) do |
0 | 113 if child.name == name then return child; end |
114 end | |
115 end | |
116 | |
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117 function stanza_mt:child_with_ns(ns) |
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118 for _, child in ipairs(self.tags) do |
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119 if child.attr.xmlns == ns then return child; end |
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120 end |
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121 end |
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122 |
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123 function stanza_mt:children() |
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124 local i = 0; |
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125 return function (a) |
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126 i = i + 1 |
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127 return a[i]; |
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128 end, self, i; |
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129 end |
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130 |
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131 function stanza_mt:matching_tags(name, xmlns) |
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132 xmlns = xmlns or self.attr.xmlns; |
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133 local tags = self.tags; |
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134 local start_i, max_i = 1, #tags; |
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135 return function () |
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136 for i=start_i,max_i do |
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137 v = tags[i]; |
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138 if (not name or v.name == name) |
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139 and (not xmlns or xmlns == v.attr.xmlns) then |
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140 start_i = i+1; |
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141 return v; |
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142 end |
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143 end |
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144 end, tags, i; |
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145 end |
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146 |
2 | 147 function stanza_mt:childtags() |
148 local i = 0; | |
149 return function (a) | |
150 i = i + 1 | |
151 local v = self.tags[i] | |
152 if v then return v; end | |
153 end, self.tags[1], i; | |
154 end | |
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155 |
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156 function stanza_mt:maptags(callback) |
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157 local tags, curr_tag = self.tags, 1; |
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158 local n_children, n_tags = #self, #tags; |
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159 |
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160 local i = 1; |
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161 while curr_tag <= n_tags do |
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162 if self[i] == tags[curr_tag] then |
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163 local ret = callback(self[i]); |
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164 if ret == nil then |
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165 t_remove(self, i); |
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166 t_remove(tags, curr_tag); |
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167 n_children = n_children - 1; |
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168 n_tags = n_tags - 1; |
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169 else |
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170 self[i] = ret; |
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171 tags[i] = ret; |
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172 end |
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173 i = i + 1; |
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174 curr_tag = curr_tag + 1; |
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175 end |
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176 end |
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177 return self; |
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178 end |
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179 |
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180 local xml_escape |
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181 do |
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182 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; |
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183 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end |
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184 _M.xml_escape = xml_escape; |
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185 end |
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186 |
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187 local function _dostring(t, buf, self, xml_escape, parentns) |
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188 local nsid = 0; |
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189 local name = t.name |
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190 t_insert(buf, "<"..name); |
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191 for k, v in pairs(t.attr) do |
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192 if s_find(k, "\1", 1, true) then |
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193 local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$"); |
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194 nsid = nsid + 1; |
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195 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'"); |
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196 elseif not(k == "xmlns" and v == parentns) then |
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197 t_insert(buf, " "..k.."='"..xml_escape(v).."'"); |
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198 end |
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199 end |
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200 local len = #t; |
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201 if len == 0 then |
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202 t_insert(buf, "/>"); |
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203 else |
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204 t_insert(buf, ">"); |
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205 for n=1,len do |
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206 local child = t[n]; |
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207 if child.name then |
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208 self(child, buf, self, xml_escape, t.attr.xmlns); |
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209 else |
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210 t_insert(buf, xml_escape(child)); |
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211 end |
4 | 212 end |
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213 t_insert(buf, "</"..name..">"); |
0 | 214 end |
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215 end |
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216 function stanza_mt.__tostring(t) |
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217 local buf = {}; |
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218 _dostring(t, buf, _dostring, xml_escape, nil); |
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219 return t_concat(buf); |
0 | 220 end |
221 | |
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222 function stanza_mt.top_tag(t) |
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223 local attr_string = ""; |
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224 if t.attr then |
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225 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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226 end |
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227 return s_format("<%s%s>", t.name, attr_string); |
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228 end |
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229 |
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230 function stanza_mt.get_text(t) |
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231 if #t.tags == 0 then |
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232 return t_concat(t); |
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233 end |
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234 end |
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235 |
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236 function stanza_mt.get_error(stanza) |
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237 local type, condition, text; |
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238 |
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239 local error_tag = stanza:get_child("error"); |
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240 if not error_tag then |
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241 return nil, nil, nil; |
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242 end |
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243 type = error_tag.attr.type; |
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244 |
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245 for child in error_tag:childtags() do |
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246 if child.attr.xmlns == xmlns_stanzas then |
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247 if not text and child.name == "text" then |
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248 text = child:get_text(); |
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249 elseif not condition then |
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250 condition = child.name; |
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251 end |
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252 if condition and text then |
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253 break; |
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254 end |
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255 end |
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256 end |
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257 return type, condition or "undefined-condition", text; |
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258 end |
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259 |
0 | 260 function stanza_mt.__add(s1, s2) |
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261 return s1:add_direct_child(s2); |
0 | 262 end |
263 | |
264 | |
265 do | |
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266 local id = 0; |
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267 function new_id() |
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268 id = id + 1; |
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269 return "lx"..id; |
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270 end |
0 | 271 end |
272 | |
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273 function preserialize(stanza) |
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274 local s = { name = stanza.name, attr = stanza.attr }; |
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275 for _, child in ipairs(stanza) do |
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276 if type(child) == "table" then |
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277 t_insert(s, preserialize(child)); |
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278 else |
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279 t_insert(s, child); |
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280 end |
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281 end |
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282 return s; |
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283 end |
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284 |
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285 function deserialize(stanza) |
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286 -- Set metatable |
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287 if stanza then |
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288 local attr = stanza.attr; |
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289 for i=1,#attr do attr[i] = nil; end |
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290 local attrx = {}; |
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291 for att in pairs(attr) do |
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292 if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then |
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293 local ns,na = s_match(att, "^([^|]+)|(.+)$"); |
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294 attrx[ns.."\1"..na] = attr[att]; |
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295 attr[att] = nil; |
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296 end |
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297 end |
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298 for a,v in pairs(attrx) do |
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299 attr[a] = v; |
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300 end |
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301 setmetatable(stanza, stanza_mt); |
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302 for _, child in ipairs(stanza) do |
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303 if type(child) == "table" then |
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304 deserialize(child); |
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305 end |
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306 end |
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307 if not stanza.tags then |
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308 -- Rebuild tags |
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309 local tags = {}; |
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310 for _, child in ipairs(stanza) do |
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311 if type(child) == "table" then |
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312 t_insert(tags, child); |
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313 end |
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314 end |
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315 stanza.tags = tags; |
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316 end |
90
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317 end |
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318 |
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319 return stanza; |
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320 end |
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321 |
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322 function clone(stanza) |
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323 local lookup_table = {}; |
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324 local function _copy(object) |
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325 if type(object) ~= "table" then |
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326 return object; |
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327 elseif lookup_table[object] then |
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328 return lookup_table[object]; |
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329 end |
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330 local new_table = {}; |
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331 lookup_table[object] = new_table; |
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332 for index, value in pairs(object) do |
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333 new_table[_copy(index)] = _copy(value); |
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334 end |
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335 return setmetatable(new_table, getmetatable(object)); |
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336 end |
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337 |
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338 return _copy(stanza) |
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339 end |
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340 |
0 | 341 function message(attr, body) |
342 if not body then | |
343 return stanza("message", attr); | |
344 else | |
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345 return stanza("message", attr):tag("body"):text(body):up(); |
0 | 346 end |
347 end | |
348 function iq(attr) | |
349 if attr and not attr.id then attr.id = new_id(); end | |
350 return stanza("iq", attr or { id = new_id() }); | |
351 end | |
352 | |
353 function reply(orig) | |
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354 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 | 355 end |
356 | |
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357 do |
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358 local xmpp_stanzas_attr = { xmlns = xmlns_stanzas }; |
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359 function error_reply(orig, type, condition, message) |
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360 local t = reply(orig); |
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361 t.attr.type = "error"; |
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362 t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here |
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363 :tag(condition, xmpp_stanzas_attr):up(); |
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364 if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end |
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365 return t; -- stanza ready for adding app-specific errors |
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366 end |
60
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367 end |
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368 |
0 | 369 function presence(attr) |
370 return stanza("presence", attr); | |
371 end | |
372 | |
262 | 373 if do_pretty_printing then |
374 local style_attrk = getstyle("yellow"); | |
375 local style_attrv = getstyle("red"); | |
376 local style_tagname = getstyle("red"); | |
377 local style_punc = getstyle("magenta"); | |
378 | |
379 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
380 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
381 --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, ">"); | |
382 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
383 function stanza_mt.pretty_print(t) | |
384 local children_text = ""; | |
385 for n, child in ipairs(t) do | |
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386 if type(child) == "string" then |
262 | 387 children_text = children_text .. xml_escape(child); |
388 else | |
389 children_text = children_text .. child:pretty_print(); | |
390 end | |
391 end | |
392 | |
393 local attr_string = ""; | |
394 if t.attr then | |
395 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 | |
396 end | |
397 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
398 end | |
399 | |
400 function stanza_mt.pretty_top_tag(t) | |
401 local attr_string = ""; | |
402 if t.attr then | |
403 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 | |
404 end | |
405 return s_format(top_tag_format, t.name, attr_string); | |
406 end | |
407 else | |
408 -- Sorry, fresh out of colours for you guys ;) | |
409 stanza_mt.pretty_print = stanza_mt.__tostring; | |
410 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
411 end | |
412 | |
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413 return _M; |