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util/stanza.lua @ 8647:638ff2ad98e6
util.pubsub: Add simple test covering publishing and retrieving an item
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 21 Mar 2018 17:03:13 +0100 |
parent | 8645:06c73b010488 |
child | 8889:c4e430c69f88 |
rev | line source |
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1523
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Remove version number from copyright headers
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1 -- Prosody IM |
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Update copyright headers for 2010
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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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util.stanza: Whitespace fix after merge (complicated)
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7 -- |
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Insert copyright/license headers
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8 |
1984
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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 error = error; |
1
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11 local t_insert = table.insert; |
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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; |
1
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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; |
4 | 22 local s_gsub = string.gsub; |
5424
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util.stanza: Add stanza:find(), a light weight XPath-like method
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23 local s_sub = string.sub; |
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util.stanza: Serializer optimizations, and nicer output for empty elements
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24 local s_find = string.find; |
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25 local os = os; |
145 | 26 |
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27 local valid_utf8 = require "util.encodings".utf8.valid; |
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28 |
262 | 29 local do_pretty_printing = not os.getenv("WINDIR"); |
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30 local getstyle, getstring; |
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31 if do_pretty_printing then |
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32 local ok, termcolours = pcall(require, "util.termcolours"); |
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33 if ok then |
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34 getstyle, getstring = termcolours.getstyle, termcolours.getstring; |
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35 else |
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36 do_pretty_printing = nil; |
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37 end |
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38 end |
262 | 39 |
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40 local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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41 |
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42 local _ENV = nil; |
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vairious: Add annotation when an empty environment is set [luacheck]
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43 -- luacheck: std none |
0 | 44 |
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util.stanza: Change __type to __name as this is used by Lua 5.3 in some error reporting functions
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45 local stanza_mt = { __name = "stanza" }; |
0 | 46 stanza_mt.__index = stanza_mt; |
47 | |
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48 local function check_name(name, name_type) |
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49 if type(name) ~= "string" then |
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50 error("invalid "..name_type.." name: expected string, got "..type(name)); |
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51 elseif #name == 0 then |
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52 error("invalid "..name_type.." name: empty string"); |
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53 elseif s_find(name, "[<>& '\"]") then |
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54 error("invalid "..name_type.." name: contains invalid characters"); |
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55 elseif not valid_utf8(name) then |
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56 error("invalid "..name_type.." name: contains invalid utf8"); |
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57 end |
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58 end |
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59 |
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60 local function check_text(text, text_type) |
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61 if type(text) ~= "string" then |
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62 error("invalid "..text_type.." value: expected string, got "..type(text)); |
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63 elseif not valid_utf8(text) then |
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64 error("invalid "..text_type.." value: contains invalid utf8"); |
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65 end |
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66 end |
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67 |
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68 local function check_attr(attr) |
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69 if attr ~= nil then |
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70 if type(attr) ~= "table" then |
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71 error("invalid attributes, expected table got "..type(attr)); |
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72 end |
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73 for k, v in pairs(attr) do |
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74 check_name(k, "attribute"); |
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75 check_text(v, "attribute"); |
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76 if type(v) ~= "string" then |
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77 error("invalid attribute value for '"..k.."': expected string, got "..type(v)); |
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78 elseif not valid_utf8(v) then |
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79 error("invalid attribute value for '"..k.."': contains invalid utf8"); |
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80 end |
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81 end |
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82 end |
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83 end |
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84 |
7256 | 85 local function new_stanza(name, attr, namespaces) |
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86 check_name(name, "tag"); |
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87 check_attr(attr); |
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88 local stanza = { name = name, attr = attr or {}, namespaces = namespaces, tags = {} }; |
0 | 89 return setmetatable(stanza, stanza_mt); |
90 end | |
91 | |
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92 local function is_stanza(s) |
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93 return getmetatable(s) == stanza_mt; |
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94 end |
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95 |
0 | 96 function stanza_mt:query(xmlns) |
97 return self:tag("query", { xmlns = xmlns }); | |
98 end | |
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99 |
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100 function stanza_mt:body(text, attr) |
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101 return self:tag("body", attr):text(text); |
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102 end |
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103 |
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104 function stanza_mt:text_tag(name, text, attr, namespaces) |
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105 return self:tag(name, attr, namespaces):text(text):up(); |
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106 end |
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107 |
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108 function stanza_mt:tag(name, attr, namespaces) |
7256 | 109 local s = new_stanza(name, attr, namespaces); |
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110 local last_add = self.last_add; |
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111 if not last_add then last_add = {}; self.last_add = last_add; end |
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112 (last_add[#last_add] or self):add_direct_child(s); |
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113 t_insert(last_add, s); |
0 | 114 return self; |
115 end | |
116 | |
117 function stanza_mt:text(text) | |
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118 if text ~= nil and text ~= "" then |
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119 check_text(text, "text"); |
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120 local last_add = self.last_add; |
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121 (last_add and last_add[#last_add] or self):add_direct_child(text); |
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122 end |
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123 return self; |
0 | 124 end |
125 | |
126 function stanza_mt:up() | |
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127 local last_add = self.last_add; |
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128 if last_add then t_remove(last_add); end |
0 | 129 return self; |
130 end | |
131 | |
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132 function stanza_mt:reset() |
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133 self.last_add = nil; |
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134 return self; |
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135 end |
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136 |
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137 function stanza_mt:add_direct_child(child) |
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138 if type(child) == "table" then |
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139 t_insert(self.tags, child); |
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140 end |
0 | 141 t_insert(self, child); |
142 end | |
143 | |
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144 function stanza_mt:add_child(child) |
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145 local last_add = self.last_add; |
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146 (last_add and last_add[#last_add] or self):add_direct_child(child); |
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147 return self; |
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148 end |
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149 |
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150 function stanza_mt:get_child(name, xmlns) |
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151 for _, child in ipairs(self.tags) do |
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152 if (not name or child.name == name) |
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153 and ((not xmlns and self.attr.xmlns == child.attr.xmlns) |
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154 or child.attr.xmlns == xmlns) then |
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155 |
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156 return child; |
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157 end |
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158 end |
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159 end |
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160 |
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161 function stanza_mt:get_child_text(name, xmlns) |
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162 local tag = self:get_child(name, xmlns); |
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163 if tag then |
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164 return tag:get_text(); |
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165 end |
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166 return nil; |
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167 end |
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168 |
0 | 169 function stanza_mt:child_with_name(name) |
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170 for _, child in ipairs(self.tags) do |
0 | 171 if child.name == name then return child; end |
172 end | |
173 end | |
174 | |
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175 function stanza_mt:child_with_ns(ns) |
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176 for _, child in ipairs(self.tags) do |
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177 if child.attr.xmlns == ns then return child; end |
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178 end |
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179 end |
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180 |
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181 function stanza_mt:children() |
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182 local i = 0; |
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183 return function (a) |
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184 i = i + 1 |
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185 return a[i]; |
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186 end, self, i; |
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187 end |
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188 |
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189 function stanza_mt:childtags(name, xmlns) |
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190 local tags = self.tags; |
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191 local start_i, max_i = 1, #tags; |
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192 return function () |
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193 for i = start_i, max_i do |
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194 local v = tags[i]; |
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195 if (not name or v.name == name) |
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196 and ((not xmlns and self.attr.xmlns == v.attr.xmlns) |
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197 or v.attr.xmlns == xmlns) then |
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198 start_i = i+1; |
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199 return v; |
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200 end |
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201 end |
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202 end; |
2 | 203 end |
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204 |
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205 function stanza_mt:maptags(callback) |
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206 local tags, curr_tag = self.tags, 1; |
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207 local n_children, n_tags = #self, #tags; |
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208 |
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209 local i = 1; |
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210 while curr_tag <= n_tags and n_tags > 0 do |
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211 if self[i] == tags[curr_tag] then |
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212 local ret = callback(self[i]); |
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213 if ret == nil then |
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214 t_remove(self, i); |
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215 t_remove(tags, curr_tag); |
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216 n_children = n_children - 1; |
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217 n_tags = n_tags - 1; |
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218 i = i - 1; |
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219 curr_tag = curr_tag - 1; |
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220 else |
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221 self[i] = ret; |
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222 tags[curr_tag] = ret; |
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223 end |
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224 curr_tag = curr_tag + 1; |
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225 end |
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226 i = i + 1; |
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227 end |
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228 return self; |
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229 end |
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230 |
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231 function stanza_mt:find(path) |
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232 local pos = 1; |
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233 local len = #path + 1; |
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234 |
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235 repeat |
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236 local xmlns, name, text; |
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237 local char = s_sub(path, pos, pos); |
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238 if char == "@" then |
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239 return self.attr[s_sub(path, pos + 1)]; |
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240 elseif char == "{" then |
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241 xmlns, pos = s_match(path, "^([^}]+)}()", pos + 1); |
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242 end |
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243 name, text, pos = s_match(path, "^([^@/#]*)([/#]?)()", pos); |
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244 name = name ~= "" and name or nil; |
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245 if pos == len then |
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246 if text == "#" then |
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247 return self:get_child_text(name, xmlns); |
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248 end |
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249 return self:get_child(name, xmlns); |
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250 end |
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251 self = self:get_child(name, xmlns); |
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252 until not self |
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253 end |
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254 |
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255 |
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256 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; |
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257 local function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end |
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258 |
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259 local function _dostring(t, buf, self, _xml_escape, parentns) |
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260 local nsid = 0; |
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261 local name = t.name |
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262 t_insert(buf, "<"..name); |
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263 for k, v in pairs(t.attr) do |
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264 if s_find(k, "\1", 1, true) then |
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265 local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$"); |
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266 nsid = nsid + 1; |
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267 t_insert(buf, " xmlns:ns"..nsid.."='".._xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='".._xml_escape(v).."'"); |
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268 elseif not(k == "xmlns" and v == parentns) then |
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269 t_insert(buf, " "..k.."='".._xml_escape(v).."'"); |
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270 end |
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271 end |
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272 local len = #t; |
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273 if len == 0 then |
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274 t_insert(buf, "/>"); |
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275 else |
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276 t_insert(buf, ">"); |
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277 for n=1,len do |
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278 local child = t[n]; |
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279 if child.name then |
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280 self(child, buf, self, _xml_escape, t.attr.xmlns); |
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281 else |
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282 t_insert(buf, _xml_escape(child)); |
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283 end |
4 | 284 end |
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285 t_insert(buf, "</"..name..">"); |
0 | 286 end |
626
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287 end |
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288 function stanza_mt.__tostring(t) |
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289 local buf = {}; |
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290 _dostring(t, buf, _dostring, xml_escape, nil); |
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291 return t_concat(buf); |
0 | 292 end |
293 | |
242
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diff
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294 function stanza_mt.top_tag(t) |
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295 local attr_string = ""; |
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|
296 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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diff
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|
297 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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|
298 end |
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diff
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|
299 return s_format("<%s%s>", t.name, attr_string); |
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diff
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|
300 end |
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|
301 |
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302 function stanza_mt.get_text(t) |
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303 if #t.tags == 0 then |
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304 return t_concat(t); |
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305 end |
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|
306 end |
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|
307 |
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308 function stanza_mt.get_error(stanza) |
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309 local error_type, condition, text; |
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310 |
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311 local error_tag = stanza:get_child("error"); |
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312 if not error_tag then |
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313 return nil, nil, nil; |
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314 end |
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315 error_type = error_tag.attr.type; |
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|
316 |
5090
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|
317 for _, child in ipairs(error_tag.tags) do |
2526
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|
318 if child.attr.xmlns == xmlns_stanzas then |
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|
319 if not text and child.name == "text" then |
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|
320 text = child:get_text(); |
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|
321 elseif not condition then |
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|
322 condition = child.name; |
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|
323 end |
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|
324 if condition and text then |
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|
325 break; |
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|
326 end |
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diff
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|
327 end |
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|
328 end |
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|
329 return error_type, condition or "undefined-condition", text; |
2526
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|
330 end |
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|
331 |
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|
332 local id = 0; |
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|
333 local function new_id() |
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|
334 id = id + 1; |
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|
335 return "lx"..id; |
0 | 336 end |
337 | |
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|
338 local function preserialize(stanza) |
90
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Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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70
diff
changeset
|
339 local s = { name = stanza.name, attr = stanza.attr }; |
da468ed49a7b
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70
diff
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|
340 for _, child in ipairs(stanza) do |
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70
diff
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|
341 if type(child) == "table" then |
da468ed49a7b
Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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70
diff
changeset
|
342 t_insert(s, preserialize(child)); |
da468ed49a7b
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70
diff
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|
343 else |
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Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents:
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diff
changeset
|
344 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
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|
345 end |
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Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
Matthew Wild <mwild1@gmail.com>
parents:
70
diff
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|
346 end |
da468ed49a7b
Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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parents:
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diff
changeset
|
347 return s; |
da468ed49a7b
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parents:
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diff
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|
348 end |
da468ed49a7b
Stanza preserialize/deserialize helpers, to strip and restore stanzas respectively. Fixed mod_vcard to use these.
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diff
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|
349 |
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|
350 local function deserialize(stanza) |
90
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diff
changeset
|
351 -- Set metatable |
91
6d66eb6b24cb
Fixed: util.stanza.deserialize now handles nil stanzas
Waqas Hussain <waqas20@gmail.com>
parents:
90
diff
changeset
|
352 if stanza then |
1415
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util.stanza: Remove numeric attributes while deserializing
Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
353 local attr = stanza.attr; |
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354 for i=1,#attr do attr[i] = nil; end |
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355 local attrx = {}; |
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356 for att in pairs(attr) do |
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357 if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then |
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358 local ns,na = s_match(att, "^([^|]+)|(.+)$"); |
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359 attrx[ns.."\1"..na] = attr[att]; |
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360 attr[att] = nil; |
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361 end |
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362 end |
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363 for a,v in pairs(attrx) do |
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364 attr[a] = v; |
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365 end |
91
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366 setmetatable(stanza, stanza_mt); |
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367 for _, child in ipairs(stanza) do |
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368 if type(child) == "table" then |
91
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369 deserialize(child); |
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370 end |
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371 end |
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372 if not stanza.tags then |
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373 -- Rebuild tags |
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374 local tags = {}; |
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375 for _, child in ipairs(stanza) do |
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376 if type(child) == "table" then |
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377 t_insert(tags, child); |
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378 end |
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379 end |
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380 stanza.tags = tags; |
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381 end |
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382 end |
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383 |
90
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384 return stanza; |
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385 end |
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386 |
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387 local function clone(stanza) |
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388 local attr, tags = {}, {}; |
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389 for k,v in pairs(stanza.attr) do attr[k] = v; end |
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390 local old_namespaces, namespaces = stanza.namespaces; |
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391 if old_namespaces then |
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392 namespaces = {}; |
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393 for k,v in pairs(old_namespaces) do namespaces[k] = v; end |
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394 end |
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395 local new = { name = stanza.name, attr = attr, namespaces = namespaces, tags = tags }; |
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396 for i=1,#stanza do |
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397 local child = stanza[i]; |
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398 if child.name then |
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399 child = clone(child); |
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400 t_insert(tags, child); |
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401 end |
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402 t_insert(new, child); |
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403 end |
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404 return setmetatable(new, stanza_mt); |
829
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diff
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405 end |
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406 |
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407 local function message(attr, body) |
0 | 408 if not body then |
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409 return new_stanza("message", attr); |
0 | 410 else |
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411 return new_stanza("message", attr):tag("body"):text(body):up(); |
0 | 412 end |
413 end | |
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414 local function iq(attr) |
0 | 415 if attr and not attr.id then attr.id = new_id(); end |
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416 return new_stanza("iq", attr or { id = new_id() }); |
0 | 417 end |
418 | |
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419 local function reply(orig) |
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420 return new_stanza(orig.name, |
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421 orig.attr and { |
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422 to = orig.attr.from, |
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423 from = orig.attr.to, |
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424 id = orig.attr.id, |
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425 type = ((orig.name == "iq" and "result") or orig.attr.type) |
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426 }); |
0 | 427 end |
428 | |
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429 local xmpp_stanzas_attr = { xmlns = xmlns_stanzas }; |
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430 local function error_reply(orig, error_type, condition, error_message) |
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431 local t = reply(orig); |
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432 t.attr.type = "error"; |
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433 t:tag("error", {type = error_type}) --COMPAT: Some day xmlns:stanzas goes here |
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434 :tag(condition, xmpp_stanzas_attr):up(); |
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435 if error_message then t:tag("text", xmpp_stanzas_attr):text(error_message):up(); end |
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436 return t; -- stanza ready for adding app-specific errors |
60
44800be871f5
User registration, etc (jabber:iq:register)
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diff
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|
437 end |
44800be871f5
User registration, etc (jabber:iq:register)
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diff
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438 |
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439 local function presence(attr) |
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440 return new_stanza("presence", attr); |
0 | 441 end |
442 | |
262 | 443 if do_pretty_printing then |
444 local style_attrk = getstyle("yellow"); | |
445 local style_attrv = getstyle("red"); | |
446 local style_tagname = getstyle("red"); | |
447 local style_punc = getstyle("magenta"); | |
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448 |
262 | 449 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); |
450 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
451 --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, ">"); | |
452 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
453 function stanza_mt.pretty_print(t) | |
454 local children_text = ""; | |
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455 for _, child in ipairs(t) do |
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456 if type(child) == "string" then |
262 | 457 children_text = children_text .. xml_escape(child); |
458 else | |
459 children_text = children_text .. child:pretty_print(); | |
460 end | |
461 end | |
462 | |
463 local attr_string = ""; | |
464 if t.attr then | |
465 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 | |
466 end | |
467 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
468 end | |
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469 |
262 | 470 function stanza_mt.pretty_top_tag(t) |
471 local attr_string = ""; | |
472 if t.attr then | |
473 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 | |
474 end | |
475 return s_format(top_tag_format, t.name, attr_string); | |
476 end | |
477 else | |
478 -- Sorry, fresh out of colours for you guys ;) | |
479 stanza_mt.pretty_print = stanza_mt.__tostring; | |
480 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
481 end | |
482 | |
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483 return { |
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484 stanza_mt = stanza_mt; |
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485 stanza = new_stanza; |
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486 is_stanza = is_stanza; |
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487 new_id = new_id; |
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488 preserialize = preserialize; |
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489 deserialize = deserialize; |
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490 clone = clone; |
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491 message = message; |
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492 iq = iq; |
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493 reply = reply; |
5de6b93d0190
util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents:
6501
diff
changeset
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494 error_reply = error_reply; |
5de6b93d0190
util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents:
6501
diff
changeset
|
495 presence = presence; |
6821
5de30376bf98
util.stanza: Export xml_escape (missed during removal of module() calls)
Kim Alvefur <zash@zash.se>
parents:
6777
diff
changeset
|
496 xml_escape = xml_escape; |
6777
5de6b93d0190
util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents:
6501
diff
changeset
|
497 }; |