Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 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 | } |