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util/xmppstream.lua @ 5688:345761f0c2be
mod_http_files: Put the MIME type map in a global shared table
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 13 Jun 2013 23:31:11 +0200 |
parent | 5311:86fe6e2fa5ae |
child | 5776:bd0ff8ae98a8 |
child | 6042:1107d66d2ab2 |
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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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9 |
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10 local lxp = require "lxp"; |
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11 local st = require "util.stanza"; |
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12 local stanza_mt = st.stanza_mt; |
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13 |
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14 local error = error; |
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15 local tostring = tostring; |
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16 local t_insert = table.insert; |
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17 local t_concat = table.concat; |
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18 local t_remove = table.remove; |
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19 local setmetatable = setmetatable; |
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20 |
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21 -- COMPAT: w/LuaExpat 1.1.0 |
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22 local lxp_supports_doctype = pcall(lxp.new, { StartDoctypeDecl = false }); |
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23 |
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24 module "xmppstream" |
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25 |
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26 local new_parser = lxp.new; |
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27 |
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28 local xml_namespace = { |
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29 ["http://www.w3.org/XML/1998/namespace\1lang"] = "xml:lang"; |
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30 ["http://www.w3.org/XML/1998/namespace\1space"] = "xml:space"; |
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31 ["http://www.w3.org/XML/1998/namespace\1base"] = "xml:base"; |
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32 ["http://www.w3.org/XML/1998/namespace\1id"] = "xml:id"; |
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33 }; |
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34 |
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35 local xmlns_streams = "http://etherx.jabber.org/streams"; |
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36 |
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37 local ns_separator = "\1"; |
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38 local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$"; |
148 | 39 |
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40 _M.ns_separator = ns_separator; |
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41 _M.ns_pattern = ns_pattern; |
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42 |
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43 function new_sax_handlers(session, stream_callbacks) |
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44 local xml_handlers = {}; |
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45 |
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46 local cb_streamopened = stream_callbacks.streamopened; |
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47 local cb_streamclosed = stream_callbacks.streamclosed; |
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48 local cb_error = stream_callbacks.error or function(session, e, stanza) error("XML stream error: "..tostring(e)..(stanza and ": "..tostring(stanza) or ""),2); end; |
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49 local cb_handlestanza = stream_callbacks.handlestanza; |
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50 |
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51 local stream_ns = stream_callbacks.stream_ns or xmlns_streams; |
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52 local stream_tag = stream_callbacks.stream_tag or "stream"; |
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53 if stream_ns ~= "" then |
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54 stream_tag = stream_ns..ns_separator..stream_tag; |
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55 end |
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56 local stream_error_tag = stream_ns..ns_separator..(stream_callbacks.error_tag or "error"); |
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57 |
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58 local stream_default_ns = stream_callbacks.default_ns; |
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59 |
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60 local stack = {}; |
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61 local chardata, stanza = {}; |
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62 local non_streamns_depth = 0; |
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63 function xml_handlers:StartElement(tagname, attr) |
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64 if stanza and #chardata > 0 then |
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65 -- We have some character data in the buffer |
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66 t_insert(stanza, t_concat(chardata)); |
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67 chardata = {}; |
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68 end |
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69 local curr_ns,name = tagname:match(ns_pattern); |
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70 if name == "" then |
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71 curr_ns, name = "", curr_ns; |
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72 end |
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73 |
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74 if curr_ns ~= stream_default_ns or non_streamns_depth > 0 then |
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75 attr.xmlns = curr_ns; |
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76 non_streamns_depth = non_streamns_depth + 1; |
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77 end |
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78 |
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79 for i=1,#attr do |
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80 local k = attr[i]; |
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81 attr[i] = nil; |
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82 local xmlk = xml_namespace[k]; |
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83 if xmlk then |
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84 attr[xmlk] = attr[k]; |
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85 attr[k] = nil; |
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86 end |
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87 end |
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88 |
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89 if not stanza then --if we are not currently inside a stanza |
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90 if session.notopen then |
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91 if tagname == stream_tag then |
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92 non_streamns_depth = 0; |
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93 if cb_streamopened then |
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94 cb_streamopened(session, attr); |
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95 end |
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96 else |
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97 -- Garbage before stream? |
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98 cb_error(session, "no-stream"); |
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99 end |
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100 return; |
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101 end |
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102 if curr_ns == "jabber:client" and name ~= "iq" and name ~= "presence" and name ~= "message" then |
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103 cb_error(session, "invalid-top-level-element"); |
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104 end |
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105 |
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106 stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt); |
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107 else -- we are inside a stanza, so add a tag |
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108 t_insert(stack, stanza); |
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109 local oldstanza = stanza; |
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110 stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt); |
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111 t_insert(oldstanza, stanza); |
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112 t_insert(oldstanza.tags, stanza); |
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113 end |
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114 end |
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115 function xml_handlers:CharacterData(data) |
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116 if stanza then |
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117 t_insert(chardata, data); |
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118 end |
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119 end |
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120 function xml_handlers:EndElement(tagname) |
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121 if non_streamns_depth > 0 then |
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122 non_streamns_depth = non_streamns_depth - 1; |
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123 end |
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124 if stanza then |
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125 if #chardata > 0 then |
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126 -- We have some character data in the buffer |
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127 t_insert(stanza, t_concat(chardata)); |
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128 chardata = {}; |
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129 end |
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130 -- Complete stanza |
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131 if #stack == 0 then |
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132 if tagname ~= stream_error_tag then |
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133 cb_handlestanza(session, stanza); |
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134 else |
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135 cb_error(session, "stream-error", stanza); |
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136 end |
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137 stanza = nil; |
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138 else |
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139 stanza = t_remove(stack); |
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140 end |
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141 else |
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142 if cb_streamclosed then |
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143 cb_streamclosed(session); |
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144 end |
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145 end |
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146 end |
4277 | 147 |
4288 | 148 local function restricted_handler(parser) |
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149 cb_error(session, "parse-error", "restricted-xml", "Restricted XML, see RFC 6120 section 11.1."); |
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150 if not parser.stop or not parser:stop() then |
4288 | 151 error("Failed to abort parsing"); |
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152 end |
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153 end |
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154 |
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155 if lxp_supports_doctype then |
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156 xml_handlers.StartDoctypeDecl = restricted_handler; |
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157 end |
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158 xml_handlers.Comment = restricted_handler; |
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159 xml_handlers.ProcessingInstruction = restricted_handler; |
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160 |
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161 local function reset() |
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162 stanza, chardata = nil, {}; |
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163 stack = {}; |
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164 end |
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165 |
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166 local function set_session(stream, new_session) |
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167 session = new_session; |
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168 end |
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169 |
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170 return xml_handlers, { reset = reset, set_session = set_session }; |
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171 end |
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172 |
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173 function new(session, stream_callbacks) |
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174 local handlers, meta = new_sax_handlers(session, stream_callbacks); |
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175 local parser = new_parser(handlers, ns_separator); |
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176 local parse = parser.parse; |
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177 |
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178 return { |
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179 reset = function () |
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180 parser = new_parser(handlers, ns_separator); |
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181 parse = parser.parse; |
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182 meta.reset(); |
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183 end, |
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184 feed = function (self, data) |
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185 return parse(parser, data); |
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186 end, |
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187 set_session = meta.set_session; |
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188 }; |
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189 end |
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190 |
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191 return _M; |