/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2009 Sun Microsystems, Inc.
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*/
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package org.opends.server.tools;
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import org.opends.server.protocols.asn1.*;
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import org.opends.server.protocols.ldap.LDAPMessage;
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import org.opends.server.types.LDAPException;
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import org.opends.server.types.DebugLogLevel;
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import org.opends.server.types.RecordingInputStream;
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import org.opends.server.types.ByteString;
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import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
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import static org.opends.server.loggers.debug.DebugLogger.getTracer;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.util.ServerConstants;
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import java.io.IOException;
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import java.net.Socket;
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/**
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* This class defines a utility that can be used to read LDAP messages from a
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* provided socket.
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*/
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public class LDAPReader
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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private Socket socket;
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private ASN1Reader asn1Reader;
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private RecordingInputStream debugInputStream;
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/**
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* Creates a new LDAP reader that will read messages from the provided
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* socket and trace the messages using a provided tracer.
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*
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* @param socket The socket from which to read the LDAP messages.
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*
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* @throws IOException If a problem occurs while attempting to obtain an
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* input stream for the socket.
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*/
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public LDAPReader(Socket socket)
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throws IOException
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{
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this.socket = socket;
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this.debugInputStream = new RecordingInputStream(socket.getInputStream());
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this.asn1Reader = ASN1.getReader(debugInputStream);
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}
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/**
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* Reads an LDAP message from the associated input stream.
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*
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* @return The LDAP message read from the associated input stream, or
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* <CODE>null</CODE> if the end of the stream has been reached.
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*
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* @throws IOException If a problem occurs while attempting to read from the
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* input stream.
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*
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* @throws ASN1Exception If a problem occurs while attempting to decode the
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* data read as an ASN.1 sequence.
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* @throws LDAPException If a problem occurs while attempting to decode the
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* LDAP message.
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*/
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public LDAPMessage readMessage()
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throws IOException, ASN1Exception, LDAPException
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{
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debugInputStream.setRecordingEnabled(debugEnabled());
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if(!asn1Reader.hasNextElement())
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{
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// EOF was reached...
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return null;
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}
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LDAPMessage message =
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org.opends.server.protocols.ldap.LDAPReader.readMessage(asn1Reader);
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if(debugInputStream.isRecordingEnabled())
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{
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ByteString bytesRead = debugInputStream.getRecordedBytes();
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debugInputStream.clearRecordedBytes();
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StringBuilder builder = new StringBuilder();
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builder.append("bytes read from wire(len=");
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builder.append(bytesRead.length());
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builder.append("):");
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builder.append(ServerConstants.EOL);
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bytesRead.toHexPlusAscii(builder, 4);
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TRACER.debugProtocolElement(DebugLogLevel.VERBOSE, builder.toString());
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TRACER.debugProtocolElement(DebugLogLevel.VERBOSE, message.toString());
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}
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return message;
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}
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/**
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* Closes this LDAP reader and the underlying socket.
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*/
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public void close()
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{
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try
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{
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asn1Reader.close();
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}
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catch (Exception e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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if (socket != null)
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{
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try
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{
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socket.close();
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}
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catch (Exception e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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}
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}
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}
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