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mod_privacy: Cleaned up code.
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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 | |
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11 | require "util.stanza" |
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12 | |
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13 | local st = stanza; |
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14 | local tostring = tostring; |
148 | 15 | local pairs = pairs; |
16 | local ipairs = ipairs; | |
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17 | local t_insert = table.insert; |
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18 | local t_concat = table.concat; |
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19 | |
145 | 20 | local default_log = require "util.logger".init("xmlhandlers"); |
21 | ||
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22 | local error = error; |
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23 | |
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24 | module "xmlhandlers" |
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25 | |
148 | 26 | local ns_prefixes = { |
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27 | ["http://www.w3.org/XML/1998/namespace"] = "xml"; |
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28 | }; |
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29 | |
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30 | local xmlns_streams = "http://etherx.jabber.org/streams"; |
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31 | |
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32 | local ns_separator = "\1"; |
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33 | local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$"; |
148 | 34 | |
331 | 35 | function init_xmlhandlers(session, stream_callbacks) |
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36 | local ns_stack = { "" }; |
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37 | local curr_tag; |
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38 | local chardata = {}; |
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39 | local xml_handlers = {}; |
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40 | local log = session.log or default_log; |
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41 | |
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42 | local cb_streamopened = stream_callbacks.streamopened; |
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43 | local cb_streamclosed = stream_callbacks.streamclosed; |
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44 | local cb_error = stream_callbacks.error or function(session, e) error("XML stream error: "..tostring(e)); end; |
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45 | local cb_handlestanza = stream_callbacks.handlestanza; |
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46 | |
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47 | local stream_ns = stream_callbacks.stream_ns or xmlns_streams; |
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48 | local stream_tag = stream_ns..ns_separator..(stream_callbacks.stream_tag or "stream"); |
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49 | local stream_error_tag = stream_ns..ns_separator..(stream_callbacks.error_tag or "error"); |
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50 | |
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51 | local stream_default_ns = stream_callbacks.default_ns; |
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52 | |
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53 | local stanza; |
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54 | function xml_handlers:StartElement(tagname, attr) |
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55 | if stanza and #chardata > 0 then |
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56 | -- We have some character data in the buffer |
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57 | stanza:text(t_concat(chardata)); |
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58 | chardata = {}; |
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59 | end |
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60 | local curr_ns,name = tagname:match(ns_pattern); |
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61 | if name == "" then |
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62 | curr_ns, name = "", curr_ns; |
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63 | end |
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64 | |
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65 | if curr_ns ~= stream_default_ns then |
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66 | attr.xmlns = curr_ns; |
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67 | end |
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68 | |
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69 | -- FIXME !!!!! |
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70 | for i=1,#attr do |
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71 | local k = attr[i]; |
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72 | attr[i] = nil; |
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73 | local ns, nm = k:match(ns_pattern); |
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74 | if nm ~= "" then |
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75 | ns = ns_prefixes[ns]; |
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76 | if ns then |
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77 | attr[ns..":"..nm] = attr[k]; |
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78 | attr[k] = nil; |
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79 | end |
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80 | end |
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81 | end |
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82 | |
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83 | if not stanza then --if we are not currently inside a stanza |
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84 | if session.notopen then |
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85 | if tagname == stream_tag then |
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86 | if cb_streamopened then |
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87 | cb_streamopened(session, attr); |
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88 | end |
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89 | else |
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90 | -- Garbage before stream? |
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91 | cb_error(session, "no-stream"); |
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92 | end |
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93 | return; |
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94 | end |
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95 | if curr_ns == "jabber:client" and name ~= "iq" and name ~= "presence" and name ~= "message" then |
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96 | cb_error(session, "invalid-top-level-element"); |
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97 | end |
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98 | |
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99 | stanza = st.stanza(name, attr); |
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100 | curr_tag = stanza; |
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101 | else -- we are inside a stanza, so add a tag |
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102 | attr.xmlns = nil; |
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103 | if curr_ns ~= stream_default_ns then |
148 | 104 | attr.xmlns = curr_ns; |
105 | end | |
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106 | stanza:tag(name, attr); |
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107 | end |
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108 | end |
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109 | function xml_handlers:CharacterData(data) |
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110 | if stanza then |
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111 | t_insert(chardata, data); |
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112 | end |
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113 | end |
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114 | function xml_handlers:EndElement(tagname) |
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115 | local curr_ns,name = tagname:match(ns_pattern); |
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116 | if name == "" then |
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117 | curr_ns, name = "", curr_ns; |
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118 | end |
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119 | if stanza then |
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120 | if #chardata > 0 then |
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121 | -- We have some character data in the buffer |
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122 | stanza:text(t_concat(chardata)); |
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123 | chardata = {}; |
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124 | end |
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125 | -- Complete stanza |
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126 | if #stanza.last_add == 0 then |
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127 | if tagname ~= stream_error_tag then |
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128 | cb_handlestanza(session, stanza); |
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129 | else |
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130 | cb_error(session, "stream-error", stanza); |
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131 | end |
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132 | stanza = nil; |
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133 | else |
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134 | stanza:up(); |
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135 | end |
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136 | else |
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137 | if tagname == stream_tag then |
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138 | if cb_streamclosed then |
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139 | cb_streamclosed(session); |
148 | 140 | end |
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141 | else |
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142 | cb_error(session, "parse-error", "unexpected-element-close", name); |
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143 | end |
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144 | stanza, chardata = nil, {}; |
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145 | end |
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146 | end |
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147 | return xml_handlers; |
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148 | end |
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149 | |
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150 | return init_xmlhandlers; |