1 /** 2 * $RCSfile$ 3 * $Revision$ 4 * $Date$ 5 * 6 * Copyright 2009 Jive Software. 7 * 8 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package org.jivesoftware.smack; 22 23 import java.io.StringReader; 24 25 import org.jivesoftware.smack.util.PacketParserUtils; 26 import org.jivesoftware.smack.sasl.SASLMechanism.Challenge; 27 import org.jivesoftware.smack.sasl.SASLMechanism.Failure; 28 import org.jivesoftware.smack.sasl.SASLMechanism.Success; 29 import org.xmlpull.v1.XmlPullParserFactory; 30 import org.xmlpull.v1.XmlPullParser; 31 32 import com.kenai.jbosh.AbstractBody; 33 import com.kenai.jbosh.BOSHClientResponseListener; 34 import com.kenai.jbosh.BOSHMessageEvent; 35 import com.kenai.jbosh.BodyQName; 36 import com.kenai.jbosh.ComposableBody; 37 38 /** 39 * Listens for XML traffic from the BOSH connection manager and parses it into 40 * packet objects. 41 * 42 * @author Guenther Niess 43 */ 44 public class BOSHPacketReader implements BOSHClientResponseListener { 45 46 private BOSHConnection connection; 47 48 /** 49 * Create a packet reader which listen on a BOSHConnection for received 50 * HTTP responses, parse the packets and notifies the connection. 51 * 52 * @param connection the corresponding connection for the received packets. 53 */ 54 public BOSHPacketReader(BOSHConnection connection) { 55 this.connection = connection; 56 } 57 58 /** 59 * Parse the received packets and notify the corresponding connection. 60 * 61 * @param event the BOSH client response which includes the received packet. 62 */ 63 public void responseReceived(BOSHMessageEvent event) { 64 AbstractBody body = event.getBody(); 65 if (body != null) { 66 try { 67 if (connection.sessionID == null) { 68 connection.sessionID = body.getAttribute(BodyQName.create(BOSHConnection.BOSH_URI, "sid")); 69 } 70 if (connection.authID == null) { 71 connection.authID = body.getAttribute(BodyQName.create(BOSHConnection.BOSH_URI, "authid")); 72 } 73 final XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser(); 74 parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, 75 true); 76 parser.setInput(new StringReader(body.toXML())); 77 int eventType = parser.getEventType(); 78 do { 79 eventType = parser.next(); 80 if (eventType == XmlPullParser.START_TAG) { 81 if (parser.getName().equals("body")) { 82 // ignore the container root element 83 } else if (parser.getName().equals("message")) { 84 connection.processPacket(PacketParserUtils.parseMessage(parser)); 85 } else if (parser.getName().equals("iq")) { 86 connection.processPacket(PacketParserUtils.parseIQ(parser, connection)); 87 } else if (parser.getName().equals("presence")) { 88 connection.processPacket(PacketParserUtils.parsePresence(parser)); 89 } else if (parser.getName().equals("challenge")) { 90 // The server is challenging the SASL authentication 91 // made by the client 92 final String challengeData = parser.nextText(); 93 connection.getSASLAuthentication() 94 .challengeReceived(challengeData); 95 connection.processPacket(new Challenge( 96 challengeData)); 97 } else if (parser.getName().equals("success")) { 98 connection.send(ComposableBody.builder() 99 .setNamespaceDefinition("xmpp", BOSHConnection.XMPP_BOSH_NS) 100 .setAttribute( 101 BodyQName.createWithPrefix(BOSHConnection.XMPP_BOSH_NS, "restart", "xmpp"), 102 "true") 103 .setAttribute( 104 BodyQName.create(BOSHConnection.BOSH_URI, "to"), 105 connection.getServiceName()) 106 .build()); 107 connection.getSASLAuthentication().authenticated(); 108 connection.processPacket(new Success(parser.nextText())); 109 } else if (parser.getName().equals("features")) { 110 parseFeatures(parser); 111 } else if (parser.getName().equals("failure")) { 112 if ("urn:ietf:params:xml:ns:xmpp-sasl".equals(parser.getNamespace(null))) { 113 final Failure failure = PacketParserUtils.parseSASLFailure(parser); 114 connection.getSASLAuthentication().authenticationFailed(); 115 connection.processPacket(failure); 116 } 117 } else if (parser.getName().equals("error")) { 118 throw new XMPPException(PacketParserUtils.parseStreamError(parser)); 119 } 120 } 121 } while (eventType != XmlPullParser.END_DOCUMENT); 122 } 123 catch (Exception e) { 124 if (connection.isConnected()) { 125 connection.notifyConnectionError(e); 126 } 127 } 128 } 129 } 130 131 /** 132 * Parse and setup the XML stream features. 133 * 134 * @param parser the XML parser, positioned at the start of a message packet. 135 * @throws Exception if an exception occurs while parsing the packet. 136 */ 137 private void parseFeatures(XmlPullParser parser) throws Exception { 138 boolean done = false; 139 while (!done) { 140 int eventType = parser.next(); 141 142 if (eventType == XmlPullParser.START_TAG) { 143 if (parser.getName().equals("mechanisms")) { 144 // The server is reporting available SASL mechanisms. Store 145 // this information 146 // which will be used later while logging (i.e. 147 // authenticating) into 148 // the server 149 connection.getSASLAuthentication().setAvailableSASLMethods( 150 PacketParserUtils.parseMechanisms(parser)); 151 } else if (parser.getName().equals("bind")) { 152 // The server requires the client to bind a resource to the 153 // stream 154 connection.getSASLAuthentication().bindingRequired(); 155 } else if (parser.getName().equals("session")) { 156 // The server supports sessions 157 connection.getSASLAuthentication().sessionsSupported(); 158 } else if (parser.getName().equals("register")) { 159 connection.getAccountManager().setSupportsAccountCreation( 160 true); 161 } 162 } else if (eventType == XmlPullParser.END_TAG) { 163 if (parser.getName().equals("features")) { 164 done = true; 165 } 166 } 167 } 168 } 169 } 170
