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util/stanza.lua @ 2342:8b20702d5b9e
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author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 08 Dec 2009 01:24:16 +0000 |
parent | 2264:49580a13f71e |
child | 2482:a1570e371258 |
child | 2848:b2f367f16eb8 |
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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 -- |
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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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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24 local unpack = unpack; |
4 | 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; |
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 |
0 | 41 module "stanza" |
42 | |
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43 stanza_mt = { __type = "stanza" }; |
0 | 44 stanza_mt.__index = stanza_mt; |
45 | |
46 function stanza(name, attr) | |
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47 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 48 return setmetatable(stanza, stanza_mt); |
49 end | |
50 | |
51 function stanza_mt:query(xmlns) | |
52 return self:tag("query", { xmlns = xmlns }); | |
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 |
0 | 59 function stanza_mt:tag(name, attrs) |
60 local s = stanza(name, attrs); | |
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61 (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 62 t_insert(self.last_add, s); |
63 return self; | |
64 end | |
65 | |
66 function stanza_mt:text(text) | |
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67 (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 68 return self; |
69 end | |
70 | |
71 function stanza_mt:up() | |
72 t_remove(self.last_add); | |
73 return self; | |
74 end | |
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 |
0 | 88 t_insert(self, child); |
89 end | |
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: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 |
0 | 107 function stanza_mt:child_with_name(name) |
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108 for _, child in ipairs(self.tags) do |
0 | 109 if child.name == name then return child; end |
110 end | |
111 end | |
112 | |
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113 function stanza_mt:child_with_ns(ns) |
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114 for _, child in ipairs(self.tags) do |
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115 if child.attr.xmlns == ns then return child; end |
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116 end |
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117 end |
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118 |
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119 function stanza_mt:children() |
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120 local i = 0; |
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121 return function (a) |
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122 i = i + 1 |
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123 local v = a[i] |
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124 if v then return v; end |
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125 end, self, i; |
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126 |
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127 end |
2 | 128 function stanza_mt:childtags() |
129 local i = 0; | |
130 return function (a) | |
131 i = i + 1 | |
132 local v = self.tags[i] | |
133 if v then return v; end | |
134 end, self.tags[1], i; | |
135 | |
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 |
1416
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|
155 t_insert(buf, " "..k.."='"..xml_escape(v).."'"); |
776
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util.stanza: Temporary fix for serializing attributes with namespaces
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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 |
4 | 170 end |
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171 t_insert(buf, "</"..name..">"); |
0 | 172 end |
626
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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); |
0 | 178 end |
179 | |
242
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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 |
338
804f5e62a41f
Don't forget to escape XML in attributes. Thanks to the Postgres Q&A room on conference.jabber.org :)
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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 |
242
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diff
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184 end |
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185 return s_format("<%s%s>", t.name, attr_string); |
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diff
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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 |
0 | 194 function stanza_mt.__add(s1, s2) |
180
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195 return s1:add_direct_child(s2); |
0 | 196 end |
197 | |
198 | |
199 do | |
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200 local id = 0; |
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201 function new_id() |
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202 id = id + 1; |
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203 return "lx"..id; |
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|
204 end |
0 | 205 end |
206 | |
90
da468ed49a7b
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diff
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|
207 function preserialize(stanza) |
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|
208 local s = { name = stanza.name, attr = stanza.attr }; |
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|
209 for _, child in ipairs(stanza) do |
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|
210 if type(child) == "table" then |
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diff
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|
211 t_insert(s, preserialize(child)); |
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diff
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|
212 else |
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diff
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|
213 t_insert(s, child); |
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parents:
70
diff
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|
214 end |
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parents:
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diff
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|
215 end |
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diff
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|
216 return s; |
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parents:
70
diff
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|
217 end |
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|
218 |
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diff
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|
219 function deserialize(stanza) |
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diff
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|
220 -- Set metatable |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
Waqas Hussain <waqas20@gmail.com>
parents:
90
diff
changeset
|
221 if stanza then |
1415
957a81b72cb2
util.stanza: Remove numeric attributes while deserializing
Waqas Hussain <waqas20@gmail.com>
parents:
1151
diff
changeset
|
222 local attr = stanza.attr; |
957a81b72cb2
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parents:
1151
diff
changeset
|
223 for i=1,#attr do attr[i] = nil; end |
2077
e33658f6052c
Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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diff
changeset
|
224 local attrx = {}; |
e33658f6052c
Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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parents:
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diff
changeset
|
225 for att in pairs(attr) do |
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diff
changeset
|
226 if s_find(att, "|", 1, true) and not s_find(k, "\1", 1, true) then |
e33658f6052c
Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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diff
changeset
|
227 local ns,na = s_match(k, "^([^|]+)|(.+)$"); |
e33658f6052c
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diff
changeset
|
228 attrx[ns.."\1"..na] = attr[att]; |
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Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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parents:
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diff
changeset
|
229 attr[att] = nil; |
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Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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parents:
1984
diff
changeset
|
230 end |
e33658f6052c
Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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1984
diff
changeset
|
231 end |
e33658f6052c
Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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diff
changeset
|
232 for a,v in pairs(attrx) do |
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Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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diff
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|
233 attr[x] = v; |
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Changed separator between attribute names and prefixes from '|' to '\1' (optimization and cleanup).
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parents:
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diff
changeset
|
234 end |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
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parents:
90
diff
changeset
|
235 setmetatable(stanza, stanza_mt); |
90
da468ed49a7b
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parents:
70
diff
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|
236 for _, child in ipairs(stanza) do |
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parents:
70
diff
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|
237 if type(child) == "table" then |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
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parents:
90
diff
changeset
|
238 deserialize(child); |
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
|
239 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
|
240 end |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
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parents:
90
diff
changeset
|
241 if not stanza.tags then |
6d66eb6b24cb
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diff
changeset
|
242 -- Rebuild tags |
6d66eb6b24cb
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parents:
90
diff
changeset
|
243 local tags = {}; |
6d66eb6b24cb
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parents:
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diff
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|
244 for _, child in ipairs(stanza) do |
6d66eb6b24cb
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parents:
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diff
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|
245 if type(child) == "table" then |
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parents:
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diff
changeset
|
246 t_insert(tags, child); |
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diff
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|
247 end |
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parents:
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diff
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|
248 end |
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
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parents:
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diff
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|
249 stanza.tags = tags; |
680
734994b61907
Restore fix for missing last_add on deserialized stanzas. Thanks to tsing for discovering.
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parents:
627
diff
changeset
|
250 if not stanza.last_add then |
734994b61907
Restore fix for missing last_add on deserialized stanzas. Thanks to tsing for discovering.
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627
diff
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|
251 stanza.last_add = {}; |
734994b61907
Restore fix for missing last_add on deserialized stanzas. Thanks to tsing for discovering.
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627
diff
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|
252 end |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
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parents:
90
diff
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|
253 end |
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
|
254 end |
da468ed49a7b
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diff
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|
255 |
da468ed49a7b
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diff
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|
256 return stanza; |
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diff
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|
257 end |
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70
diff
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|
258 |
829
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diff
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|
259 function clone(stanza) |
1517
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|
260 local lookup_table = {}; |
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|
261 local function _copy(object) |
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|
262 if type(object) ~= "table" then |
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|
263 return object; |
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|
264 elseif lookup_table[object] then |
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|
265 return lookup_table[object]; |
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|
266 end |
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|
267 local new_table = {}; |
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|
268 lookup_table[object] = new_table; |
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|
269 for index, value in pairs(object) do |
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|
270 new_table[_copy(index)] = _copy(value); |
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|
271 end |
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|
272 return setmetatable(new_table, getmetatable(object)); |
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|
273 end |
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|
274 |
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275 return _copy(stanza) |
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276 end |
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277 |
0 | 278 function message(attr, body) |
279 if not body then | |
280 return stanza("message", attr); | |
281 else | |
282 return stanza("message", attr):tag("body"):text(body); | |
283 end | |
284 end | |
285 function iq(attr) | |
286 if attr and not attr.id then attr.id = new_id(); end | |
287 return stanza("iq", attr or { id = new_id() }); | |
288 end | |
289 | |
290 function reply(orig) | |
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291 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 | 292 end |
293 | |
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294 function error_reply(orig, type, condition, message) |
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295 local t = reply(orig); |
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296 t.attr.type = "error"; |
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297 t:tag("error", {type = type}) |
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298 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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299 if (message) then t:tag("text"):text(message):up(); end |
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300 return t; -- stanza ready for adding app-specific errors |
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301 end |
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302 |
0 | 303 function presence(attr) |
304 return stanza("presence", attr); | |
305 end | |
306 | |
262 | 307 if do_pretty_printing then |
308 local style_attrk = getstyle("yellow"); | |
309 local style_attrv = getstyle("red"); | |
310 local style_tagname = getstyle("red"); | |
311 local style_punc = getstyle("magenta"); | |
312 | |
313 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
314 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
315 --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, ">"); | |
316 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
317 function stanza_mt.pretty_print(t) | |
318 local children_text = ""; | |
319 for n, child in ipairs(t) do | |
320 if type(child) == "string" then | |
321 children_text = children_text .. xml_escape(child); | |
322 else | |
323 children_text = children_text .. child:pretty_print(); | |
324 end | |
325 end | |
326 | |
327 local attr_string = ""; | |
328 if t.attr then | |
329 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 | |
330 end | |
331 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
332 end | |
333 | |
334 function stanza_mt.pretty_top_tag(t) | |
335 local attr_string = ""; | |
336 if t.attr then | |
337 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 | |
338 end | |
339 return s_format(top_tag_format, t.name, attr_string); | |
340 end | |
341 else | |
342 -- Sorry, fresh out of colours for you guys ;) | |
343 stanza_mt.pretty_print = stanza_mt.__tostring; | |
344 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
345 end | |
346 | |
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347 return _M; |