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util/stanza.lua @ 1931:f203330eb82e
util.stanza: Make xml_escape publicly accessible
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 06 Oct 2009 18:05:31 +0100 |
parent | 1874:262ea889016f |
child | 1932:af8cdbb63b13 |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
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4 -- |
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"); |
31 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; | |
32 | |
145 | 33 local log = require "util.logger".init("stanza"); |
34 | |
0 | 35 module "stanza" |
36 | |
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37 stanza_mt = { __type = "stanza" }; |
0 | 38 stanza_mt.__index = stanza_mt; |
39 | |
40 function stanza(name, attr) | |
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41 local stanza = { name = name, attr = attr or {}, tags = {}, last_add = {}}; |
0 | 42 return setmetatable(stanza, stanza_mt); |
43 end | |
44 | |
45 function stanza_mt:query(xmlns) | |
46 return self:tag("query", { xmlns = xmlns }); | |
47 end | |
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48 |
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49 function stanza_mt:body(text, attr) |
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50 return self:tag("body", attr):text(text); |
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51 end |
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52 |
0 | 53 function stanza_mt:tag(name, attrs) |
54 local s = stanza(name, attrs); | |
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55 (self.last_add[#self.last_add] or self):add_direct_child(s); |
0 | 56 t_insert(self.last_add, s); |
57 return self; | |
58 end | |
59 | |
60 function stanza_mt:text(text) | |
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61 (self.last_add[#self.last_add] or self):add_direct_child(text); |
0 | 62 return self; |
63 end | |
64 | |
65 function stanza_mt:up() | |
66 t_remove(self.last_add); | |
67 return self; | |
68 end | |
69 | |
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70 function stanza_mt:reset() |
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71 local last_add = self.last_add; |
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72 for i = 1,#last_add do |
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73 last_add[i] = nil; |
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74 end |
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75 return self; |
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76 end |
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77 |
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78 function stanza_mt:add_direct_child(child) |
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79 if type(child) == "table" then |
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80 t_insert(self.tags, child); |
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81 end |
0 | 82 t_insert(self, child); |
83 end | |
84 | |
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85 function stanza_mt:add_child(child) |
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86 (self.last_add[#self.last_add] or self):add_direct_child(child); |
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87 return self; |
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88 end |
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89 |
0 | 90 function stanza_mt:child_with_name(name) |
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91 for _, child in ipairs(self.tags) do |
0 | 92 if child.name == name then return child; end |
93 end | |
94 end | |
95 | |
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96 function stanza_mt:child_with_ns(ns) |
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97 for _, child in ipairs(self.tags) do |
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98 if child.attr.xmlns == ns then return child; end |
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99 end |
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100 end |
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101 |
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102 function stanza_mt:children() |
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103 local i = 0; |
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104 return function (a) |
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105 i = i + 1 |
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106 local v = a[i] |
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107 if v then return v; end |
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108 end, self, i; |
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109 |
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110 end |
2 | 111 function stanza_mt:childtags() |
112 local i = 0; | |
113 return function (a) | |
114 i = i + 1 | |
115 local v = self.tags[i] | |
116 if v then return v; end | |
117 end, self.tags[1], i; | |
118 | |
119 end | |
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120 |
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121 local xml_escape |
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122 do |
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123 local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; |
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124 function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end |
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125 _M.xml_escape = xml_escape; |
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126 end |
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127 |
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128 local function _dostring(t, buf, self, xml_escape) |
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129 local nsid = 0; |
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130 local name = t.name |
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131 t_insert(buf, "<"..name); |
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132 for k, v in pairs(t.attr) do |
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133 if s_find(k, "|", 1, true) then |
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134 local ns, attrk = s_match(k, "^([^|]+)|(.+)$"); |
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135 nsid = nsid + 1; |
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136 t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'"); |
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137 else |
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138 t_insert(buf, " "..k.."='"..xml_escape(v).."'"); |
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139 end |
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140 end |
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141 local len = #t; |
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142 if len == 0 then |
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143 t_insert(buf, "/>"); |
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144 else |
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145 t_insert(buf, ">"); |
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146 for n=1,len do |
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147 local child = t[n]; |
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148 if child.name then |
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149 self(child, buf, self, xml_escape); |
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150 else |
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151 t_insert(buf, xml_escape(child)); |
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152 end |
4 | 153 end |
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154 t_insert(buf, "</"..name..">"); |
0 | 155 end |
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156 end |
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157 function stanza_mt.__tostring(t) |
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158 local buf = {}; |
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159 _dostring(t, buf, _dostring, xml_escape); |
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160 return t_concat(buf); |
0 | 161 end |
162 | |
242
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163 function stanza_mt.top_tag(t) |
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164 local attr_string = ""; |
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165 if t.attr then |
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166 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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167 end |
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168 return s_format("<%s%s>", t.name, attr_string); |
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169 end |
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170 |
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171 function stanza_mt.get_text(t) |
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172 if #t.tags == 0 then |
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173 return t_concat(t); |
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174 end |
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175 end |
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176 |
0 | 177 function stanza_mt.__add(s1, s2) |
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178 return s1:add_direct_child(s2); |
0 | 179 end |
180 | |
181 | |
182 do | |
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183 local id = 0; |
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184 function new_id() |
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185 id = id + 1; |
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186 return "lx"..id; |
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187 end |
0 | 188 end |
189 | |
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190 function preserialize(stanza) |
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191 local s = { name = stanza.name, attr = stanza.attr }; |
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192 for _, child in ipairs(stanza) do |
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193 if type(child) == "table" then |
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194 t_insert(s, preserialize(child)); |
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195 else |
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196 t_insert(s, child); |
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197 end |
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198 end |
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199 return s; |
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200 end |
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201 |
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202 function deserialize(stanza) |
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203 -- Set metatable |
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204 if stanza then |
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205 local attr = stanza.attr; |
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206 for i=1,#attr do attr[i] = nil; end |
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207 setmetatable(stanza, stanza_mt); |
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208 for _, child in ipairs(stanza) do |
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209 if type(child) == "table" then |
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210 deserialize(child); |
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211 end |
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212 end |
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213 if not stanza.tags then |
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214 -- Rebuild tags |
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215 local tags = {}; |
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216 for _, child in ipairs(stanza) do |
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217 if type(child) == "table" then |
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218 t_insert(tags, child); |
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219 end |
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220 end |
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221 stanza.tags = tags; |
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222 if not stanza.last_add then |
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223 stanza.last_add = {}; |
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224 end |
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225 end |
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226 end |
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227 |
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228 return stanza; |
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229 end |
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230 |
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231 function clone(stanza) |
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232 local lookup_table = {}; |
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233 local function _copy(object) |
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234 if type(object) ~= "table" then |
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235 return object; |
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236 elseif lookup_table[object] then |
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237 return lookup_table[object]; |
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238 end |
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239 local new_table = {}; |
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240 lookup_table[object] = new_table; |
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241 for index, value in pairs(object) do |
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242 new_table[_copy(index)] = _copy(value); |
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243 end |
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244 return setmetatable(new_table, getmetatable(object)); |
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245 end |
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246 |
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247 return _copy(stanza) |
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248 end |
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249 |
0 | 250 function message(attr, body) |
251 if not body then | |
252 return stanza("message", attr); | |
253 else | |
254 return stanza("message", attr):tag("body"):text(body); | |
255 end | |
256 end | |
257 function iq(attr) | |
258 if attr and not attr.id then attr.id = new_id(); end | |
259 return stanza("iq", attr or { id = new_id() }); | |
260 end | |
261 | |
262 function reply(orig) | |
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263 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 | 264 end |
265 | |
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266 function error_reply(orig, type, condition, message) |
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267 local t = reply(orig); |
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268 t.attr.type = "error"; |
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269 t:tag("error", {type = type}) |
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270 :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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271 if (message) then t:tag("text"):text(message):up(); end |
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272 return t; -- stanza ready for adding app-specific errors |
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273 end |
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274 |
0 | 275 function presence(attr) |
276 return stanza("presence", attr); | |
277 end | |
278 | |
262 | 279 if do_pretty_printing then |
280 local style_attrk = getstyle("yellow"); | |
281 local style_attrv = getstyle("red"); | |
282 local style_tagname = getstyle("red"); | |
283 local style_punc = getstyle("magenta"); | |
284 | |
285 local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'"); | |
286 local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">"); | |
287 --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, ">"); | |
288 local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">"); | |
289 function stanza_mt.pretty_print(t) | |
290 local children_text = ""; | |
291 for n, child in ipairs(t) do | |
292 if type(child) == "string" then | |
293 children_text = children_text .. xml_escape(child); | |
294 else | |
295 children_text = children_text .. child:pretty_print(); | |
296 end | |
297 end | |
298 | |
299 local attr_string = ""; | |
300 if t.attr then | |
301 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 | |
302 end | |
303 return s_format(tag_format, t.name, attr_string, children_text, t.name); | |
304 end | |
305 | |
306 function stanza_mt.pretty_top_tag(t) | |
307 local attr_string = ""; | |
308 if t.attr then | |
309 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 | |
310 end | |
311 return s_format(top_tag_format, t.name, attr_string); | |
312 end | |
313 else | |
314 -- Sorry, fresh out of colours for you guys ;) | |
315 stanza_mt.pretty_print = stanza_mt.__tostring; | |
316 stanza_mt.pretty_top_tag = stanza_mt.top_tag; | |
317 end | |
318 | |
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319 return _M; |