1 | /* |
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2 | * Jeti, a Java Jabber client, Copyright (C) 2001 E.S. de Boer |
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3 | * |
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4 | * This program is free software; you can redistribute it and/or modify |
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5 | * it under the terms of the GNU General Public License as published by |
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6 | * the Free Software Foundation; either version 2 of the License, or |
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7 | * (at your option) any later version. |
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8 | * |
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9 | * This program is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU General Public License |
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15 | * along with this program; if not, write to the Free Software |
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16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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17 | * |
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18 | * For questions, comments etc, |
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19 | * use the website at http://jeti.jabberstudio.org |
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20 | * or mail/IM me at jeti@jabber.org |
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21 | * |
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22 | * created 2001 |
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23 | */ |
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24 | |
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25 | package nu.fw.jeti.backend; |
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26 | |
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27 | import nu.fw.jeti.jabber.elements.Packet; |
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28 | import nu.fw.jeti.jabber.handlers.ExtensionHandler; |
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29 | import nu.fw.jeti.jabber.handlers.PacketHandler; |
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30 | import nu.fw.jeti.jabber.handlers.UnknownPacketHandler; |
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31 | import nu.fw.jeti.util.Log; |
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32 | import org.xml.sax.Attributes; |
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33 | import org.xml.sax.SAXException; |
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34 | import org.xml.sax.helpers.DefaultHandler; |
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35 | |
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36 | /** |
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37 | * @author E.S. de Boer |
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38 | * @version 1.0 |
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39 | */ |
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40 | |
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41 | public class JabberHandler extends DefaultHandler |
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42 | { |
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43 | private int depth;//current depth in xml doc |
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44 | private PacketHandler packetHandeler; |
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45 | private ExtensionHandler extensionHandler; |
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46 | private Handlers handlers; |
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47 | private PacketReceiver packetReceiver; |
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48 | private StringBuffer completeXML = new StringBuffer(); |
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49 | |
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50 | public JabberHandler(PacketReceiver connect,Handlers handlers) |
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51 | { |
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52 | this.handlers =handlers; |
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53 | this.packetReceiver = connect; |
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54 | } |
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55 | |
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56 | public void changePacketReceiver(PacketReceiver reciever) |
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57 | { |
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58 | packetReceiver = reciever; |
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59 | } |
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60 | |
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61 | public void startDocument() |
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62 | { |
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63 | //System.out.println("<?xml version='1.0' encoding='UTF-8'?>"); |
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64 | } |
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65 | |
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66 | public void endDocument(){ System.out.println("end document");} |
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67 | |
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68 | |
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69 | |
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70 | public void startElement(String namespaceURI, |
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71 | String sName, // simple name |
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72 | String qName, // qualified name |
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73 | Attributes attrs) |
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74 | throws SAXException |
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75 | { |
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76 | try{ |
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77 | switch(depth++) |
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78 | { |
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79 | case 0: |
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80 | if("stream:stream".equals(qName)) |
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81 | { |
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82 | String sessionID = attrs.getValue("id"); |
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83 | String xmppVersion = attrs.getValue("version"); |
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84 | //connected only when connecting so cast to connect make interface for register? |
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85 | ((ConnectionPacketReceiver)packetReceiver).connected(sessionID,xmppVersion); |
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86 | //no connection id on sun server so don't throw the error |
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87 | //if(sessionID == null) throw new SAXException("session id = null"); |
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88 | return; |
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89 | } |
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90 | else if(qName.equals("stream:error")) break; |
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91 | throw new SAXException("No stream:stream element"); |
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92 | case 1://iq message and presence |
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93 | completeXML = new StringBuffer();//new packet so clear stringbuffer |
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94 | //if(qName.equals("stream:error")) break; |
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95 | packetHandeler = handlers.getPacketHandler(qName); |
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96 | extensionHandler = null; |
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97 | if(packetHandeler == null) |
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98 | {//unknown handler |
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99 | Log.notParsedXML(qName + " is not a message, presence or iq packet"); |
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100 | packetHandeler = new UnknownPacketHandler(); |
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101 | } |
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102 | packetHandeler.startHandling(attrs); |
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103 | break; |
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104 | default: |
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105 | String xmlns = attrs.getValue("xmlns"); |
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106 | if(xmlns !=null) |
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107 | {//if contains xmlns new extension //extension in extension? |
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108 | ExtensionHandler tempExtensionHandler = handlers.getExtensionHandler(xmlns); |
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109 | if(tempExtensionHandler == null) |
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110 | {// unknown extension handler |
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111 | tempExtensionHandler = handlers.getExtensionHandler("unknown"); |
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112 | } |
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113 | if (extensionHandler != null) tempExtensionHandler.setParent(extensionHandler);//extension in extension |
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114 | extensionHandler = tempExtensionHandler; |
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115 | extensionHandler.setName(qName); |
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116 | extensionHandler.startHandling(attrs); |
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117 | } |
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118 | else if(extensionHandler !=null) |
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119 | {//no new extension |
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120 | extensionHandler.up(); |
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121 | extensionHandler.startElement(qName,attrs); |
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122 | } |
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123 | else packetHandeler.startElement(qName, attrs); |
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124 | } |
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125 | completeXML.append("<"); |
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126 | completeXML.append(qName); |
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127 | if (attrs != null) { |
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128 | String aName = null; |
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129 | for (int i = 0; i < attrs.getLength(); i++) { |
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130 | aName = attrs.getQName(i); |
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131 | completeXML.append(" "); |
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132 | completeXML.append(aName+"=\""+attrs.getValue(i)+"\""); |
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133 | } |
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134 | } |
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135 | completeXML.append(">"); |
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136 | } catch (Exception e){throw new SAXException(e);} |
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137 | } |
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138 | |
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139 | public void endElement(String namespaceURI, |
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140 | String sName, // simple name |
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141 | String qName // qualified name |
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142 | ) |
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143 | throws SAXException |
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144 | { |
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145 | try{ |
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146 | completeXML.append("</"); |
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147 | completeXML.append(qName); |
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148 | completeXML.append(">"); |
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149 | switch(--depth){ |
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150 | case 0: // We're back at the end of the root |
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151 | break; |
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152 | case 1:// The Packet is finished |
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153 | Log.completeXML(completeXML); |
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154 | /* |
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155 | if(qName.equals("stream:error")) |
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156 | { |
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157 | Packet packet = packetHandeler.build(); |
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158 | Log.xmlPacket(packet); |
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159 | packetReceiver.streamError(packet); |
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160 | break; |
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161 | } |
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162 | */ |
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163 | try{ |
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164 | Packet packet = packetHandeler.build(); |
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165 | Log.xmlPacket(packet); |
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166 | packetReceiver.receivePackets(packet); |
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167 | }catch(InstantiationException e){Log.xmlParseException(e);} |
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168 | catch (UnsupportedOperationException e) |
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169 | {//only way to stop xml parser |
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170 | if("end xmlparser".equals(e.getMessage())) {throw new SAXException("end xmlparser");} |
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171 | } |
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172 | catch(Exception e) |
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173 | { |
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174 | e.printStackTrace(); |
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175 | } |
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176 | break; |
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177 | default: // Move back up the tree |
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178 | if(extensionHandler != null) |
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179 | {//in extension |
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180 | //if(extensionHandler.getName().equals(qName))//name matched start tag so close extension |
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181 | if(extensionHandler.isTop()) |
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182 | { |
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183 | ExtensionHandler parent = extensionHandler.getParent(); |
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184 | if(parent != null) |
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185 | {//extension has parent add this extension to parent |
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186 | try{ |
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187 | parent.addExtension(extensionHandler.build()); |
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188 | }catch(InstantiationException e){Log.xmlParseException(e);} |
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189 | extensionHandler.setParent(null);//clear parent |
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190 | extensionHandler = parent; |
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191 | } |
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192 | else |
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193 | {//add extension to packet |
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194 | try{ |
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195 | packetHandeler.addExtension(extensionHandler.build()); |
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196 | }catch(InstantiationException e){Log.xmlParseException(e);} |
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197 | extensionHandler = null; |
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198 | } |
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199 | }// element end inside a extension |
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200 | else |
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201 | { |
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202 | extensionHandler.down(); |
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203 | extensionHandler.endElement(qName); |
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204 | } |
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205 | }// element end inside a packet |
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206 | else packetHandeler.endElement(qName); |
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207 | } |
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208 | } catch (Exception e){throw new SAXException(e);} |
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209 | } |
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210 | |
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211 | public void characters(char buf[], int offset, int len) throws SAXException |
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212 | { |
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213 | try{ |
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214 | String text = new String(buf, offset,len); //.trim(); |
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215 | if(extensionHandler != null) extensionHandler.characters(text); |
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216 | else if (packetHandeler!=null) packetHandeler.characters(text); |
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217 | completeXML.append(text.trim()); |
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218 | } catch (Exception e){throw new SAXException(e);} |
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219 | } |
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220 | } |
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221 | /* |
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222 | * Overrides for emacs |
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223 | * Local variables: |
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224 | * tab-width: 4 |
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225 | * End: |
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226 | */ |
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