/*
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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 legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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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 legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* 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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* Portions Copyright 2013-2015 ForgeRock AS
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*/
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package org.opends.server.loggers;
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import static org.opends.messages.ConfigMessages.*;
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import static org.opends.server.util.StaticUtils.*;
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import java.io.File;
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import java.io.IOException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.config.server.ConfigChangeResult;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.forgerock.util.Utils;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.FileBasedHTTPAccessLogPublisherCfg;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.core.ServerContext;
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import org.opends.server.types.DN;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.FilePermission;
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import org.opends.server.types.InitializationException;
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import org.opends.server.util.TimeThread;
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/**
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* This class provides the implementation of the HTTP access logger used by the
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* directory server.
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*/
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public final class TextHTTPAccessLogPublisher extends
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HTTPAccessLogPublisher<FileBasedHTTPAccessLogPublisherCfg>
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implements ConfigurationChangeListener<FileBasedHTTPAccessLogPublisherCfg>
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{
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// Extended log format standard fields
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private static final String ELF_C_IP = "c-ip";
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private static final String ELF_C_PORT = "c-port";
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private static final String ELF_CS_HOST = "cs-host";
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private static final String ELF_CS_METHOD = "cs-method";
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private static final String ELF_CS_URI_QUERY = "cs-uri-query";
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private static final String ELF_CS_USER_AGENT = "cs(User-Agent)";
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private static final String ELF_CS_USERNAME = "cs-username";
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private static final String ELF_CS_VERSION = "cs-version";
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private static final String ELF_S_COMPUTERNAME = "s-computername";
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private static final String ELF_S_IP = "s-ip";
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private static final String ELF_S_PORT = "s-port";
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private static final String ELF_SC_STATUS = "sc-status";
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// Application specific fields (eXtensions)
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private static final String X_CONNECTION_ID = "x-connection-id";
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private static final String X_DATETIME = "x-datetime";
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private static final String X_ETIME = "x-etime";
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private static final String X_TRANSACTION_ID = "x-transaction-id";
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private static final Set<String> ALL_SUPPORTED_FIELDS = new HashSet<>(
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Arrays.asList(ELF_C_IP, ELF_C_PORT, ELF_CS_HOST, ELF_CS_METHOD,
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ELF_CS_URI_QUERY, ELF_CS_USER_AGENT, ELF_CS_USERNAME, ELF_CS_VERSION,
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ELF_S_COMPUTERNAME, ELF_S_IP, ELF_S_PORT, ELF_SC_STATUS,
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X_CONNECTION_ID, X_DATETIME, X_ETIME, X_TRANSACTION_ID));
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/**
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* Returns an instance of the text HTTP access log publisher that will print
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* all messages to the provided writer. This is used to print the messages to
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* the console when the server starts up.
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*
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* @param writer
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* The text writer where the message will be written to.
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* @return The instance of the text error log publisher that will print all
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* messages to standard out.
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*/
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public static TextHTTPAccessLogPublisher getStartupTextHTTPAccessPublisher(
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final TextWriter writer)
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{
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final TextHTTPAccessLogPublisher startupPublisher = new TextHTTPAccessLogPublisher();
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startupPublisher.writer = writer;
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return startupPublisher;
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}
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private TextWriter writer;
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private FileBasedHTTPAccessLogPublisherCfg cfg;
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private List<String> logFormatFields;
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private String timeStampFormat = "dd/MMM/yyyy:HH:mm:ss Z";
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@Override
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public ConfigChangeResult applyConfigurationChange(final FileBasedHTTPAccessLogPublisherCfg config)
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{
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final ConfigChangeResult ccr = new ConfigChangeResult();
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try
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{
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// Determine the writer we are using. If we were writing asynchronously,
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// we need to modify the underlying writer.
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TextWriter currentWriter;
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if (writer instanceof AsynchronousTextWriter)
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{
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currentWriter = ((AsynchronousTextWriter) writer).getWrappedWriter();
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}
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else
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{
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currentWriter = writer;
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}
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if (currentWriter instanceof MultifileTextWriter)
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{
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final MultifileTextWriter mfWriter = (MultifileTextWriter) currentWriter;
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configure(mfWriter, config);
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if (config.isAsynchronous())
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{
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if (writer instanceof AsynchronousTextWriter)
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{
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if (hasAsyncConfigChanged(config))
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{
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// reinstantiate
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final AsynchronousTextWriter previousWriter = (AsynchronousTextWriter) writer;
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writer = newAsyncWriter(mfWriter, config);
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previousWriter.shutdown(false);
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}
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}
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else
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{
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// turn async text writer on
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writer = newAsyncWriter(mfWriter, config);
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}
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}
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else
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{
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if (writer instanceof AsynchronousTextWriter)
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{
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// asynchronous is being turned off, remove async text writers.
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final AsynchronousTextWriter previousWriter = (AsynchronousTextWriter) writer;
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writer = mfWriter;
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previousWriter.shutdown(false);
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}
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}
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if (cfg.isAsynchronous() && config.isAsynchronous()
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&& cfg.getQueueSize() != config.getQueueSize())
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{
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ccr.setAdminActionRequired(true);
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}
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if (!config.getLogRecordTimeFormat().equals(timeStampFormat))
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{
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TimeThread.removeUserDefinedFormatter(timeStampFormat);
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timeStampFormat = config.getLogRecordTimeFormat();
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}
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cfg = config;
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logFormatFields = extractFieldsOrder(cfg.getLogFormat());
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LocalizableMessage errorMessage = validateLogFormat(logFormatFields);
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if (errorMessage != null)
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{
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ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
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ccr.setAdminActionRequired(true);
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ccr.addMessage(errorMessage);
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}
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}
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}
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catch (final Exception e)
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{
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ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
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ccr.addMessage(ERR_CONFIG_LOGGING_CANNOT_CREATE_WRITER.get(
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config.dn(), stackTraceToSingleLineString(e)));
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}
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return ccr;
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}
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private void configure(MultifileTextWriter mfWriter, FileBasedHTTPAccessLogPublisherCfg config)
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throws DirectoryException
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{
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final FilePermission perm = FilePermission.decodeUNIXMode(config.getLogFilePermissions());
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final boolean writerAutoFlush = config.isAutoFlush() && !config.isAsynchronous();
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final File logFile = getLogFile(config);
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final FileNamingPolicy fnPolicy = new TimeStampNaming(logFile);
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mfWriter.setNamingPolicy(fnPolicy);
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mfWriter.setFilePermissions(perm);
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mfWriter.setAppend(config.isAppend());
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mfWriter.setAutoFlush(writerAutoFlush);
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mfWriter.setBufferSize((int) config.getBufferSize());
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mfWriter.setInterval(config.getTimeInterval());
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mfWriter.removeAllRetentionPolicies();
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mfWriter.removeAllRotationPolicies();
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for (final DN dn : config.getRotationPolicyDNs())
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{
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mfWriter.addRotationPolicy(DirectoryServer.getRotationPolicy(dn));
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}
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for (final DN dn : config.getRetentionPolicyDNs())
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{
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mfWriter.addRetentionPolicy(DirectoryServer.getRetentionPolicy(dn));
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}
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}
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private File getLogFile(final FileBasedHTTPAccessLogPublisherCfg config)
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{
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return getFileForPath(config.getLogFile());
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}
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private boolean hasAsyncConfigChanged(FileBasedHTTPAccessLogPublisherCfg newConfig)
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{
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return hasParallelConfigChanged(newConfig) && cfg.getQueueSize() != newConfig.getQueueSize();
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}
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private boolean hasParallelConfigChanged(FileBasedHTTPAccessLogPublisherCfg newConfig)
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{
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return !cfg.dn().equals(newConfig.dn()) && cfg.isAutoFlush() != newConfig.isAutoFlush();
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}
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private AsynchronousTextWriter newAsyncWriter(MultifileTextWriter mfWriter, FileBasedHTTPAccessLogPublisherCfg config)
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{
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String name = "Asynchronous Text Writer for " + config.dn();
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return new AsynchronousTextWriter(name, config.getQueueSize(), config.isAutoFlush(), mfWriter);
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}
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private List<String> extractFieldsOrder(String logFormat)
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{
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// there will always be at least one field value due to the regexp
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// validating the log format
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return Arrays.asList(logFormat.split(" "));
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}
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/**
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* Validates the provided fields for the log format.
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*
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* @param fields
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* the fields comprising the log format.
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* @return an error message when validation fails, null otherwise
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*/
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private LocalizableMessage validateLogFormat(List<String> fields)
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{
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final Collection<String> unsupportedFields =
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subtract(fields, ALL_SUPPORTED_FIELDS);
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if (!unsupportedFields.isEmpty())
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{ // there are some unsupported fields. List them.
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return WARN_CONFIG_LOGGING_UNSUPPORTED_FIELDS_IN_LOG_FORMAT.get(
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cfg.dn(), Utils.joinAsString(", ", unsupportedFields));
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}
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if (fields.size() == unsupportedFields.size())
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{ // all fields are unsupported
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return ERR_CONFIG_LOGGING_EMPTY_LOG_FORMAT.get(cfg.dn());
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}
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return null;
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}
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/**
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* Returns a new Collection containing a - b.
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*
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* @param <T>
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* @param a
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* the collection to subtract from, must not be null
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* @param b
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* the collection to subtract, must not be null
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* @return a new collection with the results
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*/
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private <T> Collection<T> subtract(Collection<T> a, Collection<T> b)
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{
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final Collection<T> result = new ArrayList<>();
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for (T elem : a)
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{
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if (!b.contains(elem))
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{
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result.add(elem);
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}
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}
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return result;
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}
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@Override
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public void initializeLogPublisher(
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final FileBasedHTTPAccessLogPublisherCfg cfg, ServerContext serverContext)
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throws ConfigException, InitializationException
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{
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final File logFile = getLogFile(cfg);
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final FileNamingPolicy fnPolicy = new TimeStampNaming(logFile);
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try
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{
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final FilePermission perm = FilePermission.decodeUNIXMode(cfg.getLogFilePermissions());
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final LogPublisherErrorHandler errorHandler = new LogPublisherErrorHandler(cfg.dn());
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final boolean writerAutoFlush = cfg.isAutoFlush() && !cfg.isAsynchronous();
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final MultifileTextWriter theWriter = new MultifileTextWriter(
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"Multifile Text Writer for " + cfg.dn(),
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cfg.getTimeInterval(), fnPolicy, perm, errorHandler, "UTF-8",
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writerAutoFlush, cfg.isAppend(), (int) cfg.getBufferSize());
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// Validate retention and rotation policies.
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for (final DN dn : cfg.getRotationPolicyDNs())
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{
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theWriter.addRotationPolicy(DirectoryServer.getRotationPolicy(dn));
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}
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for (final DN dn : cfg.getRetentionPolicyDNs())
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{
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theWriter.addRetentionPolicy(DirectoryServer.getRetentionPolicy(dn));
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}
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if (cfg.isAsynchronous())
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{
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this.writer = newAsyncWriter(theWriter, cfg);
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}
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else
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{
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this.writer = theWriter;
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}
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}
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catch (final DirectoryException e)
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{
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throw new InitializationException(
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ERR_CONFIG_LOGGING_CANNOT_CREATE_WRITER.get(cfg.dn(), e), e);
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}
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catch (final IOException e)
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{
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throw new InitializationException(
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ERR_CONFIG_LOGGING_CANNOT_OPEN_FILE.get(logFile, cfg.dn(), e), e);
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}
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this.cfg = cfg;
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logFormatFields = extractFieldsOrder(cfg.getLogFormat());
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LocalizableMessage error = validateLogFormat(logFormatFields);
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if (error != null)
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{
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throw new InitializationException(error);
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}
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timeStampFormat = cfg.getLogRecordTimeFormat();
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cfg.addFileBasedHTTPAccessChangeListener(this);
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}
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@Override
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public boolean isConfigurationAcceptable(
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final FileBasedHTTPAccessLogPublisherCfg configuration,
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final List<LocalizableMessage> unacceptableReasons)
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{
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return isConfigurationChangeAcceptable(configuration, unacceptableReasons);
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}
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@Override
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public boolean isConfigurationChangeAcceptable(
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final FileBasedHTTPAccessLogPublisherCfg config,
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final List<LocalizableMessage> unacceptableReasons)
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{
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// Validate the time-stamp formatter.
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final String formatString = config.getLogRecordTimeFormat();
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try
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{
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new SimpleDateFormat(formatString);
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}
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catch (final Exception e)
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{
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unacceptableReasons.add(ERR_CONFIG_LOGGING_INVALID_TIME_FORMAT.get(formatString));
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return false;
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}
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// Make sure the permission is valid.
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try
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{
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final FilePermission filePerm = FilePermission.decodeUNIXMode(config.getLogFilePermissions());
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if (!filePerm.isOwnerWritable())
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{
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final LocalizableMessage message = ERR_CONFIG_LOGGING_INSANE_MODE.get(config.getLogFilePermissions());
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unacceptableReasons.add(message);
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return false;
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}
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}
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catch (final DirectoryException e)
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{
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unacceptableReasons.add(ERR_CONFIG_LOGGING_MODE_INVALID.get(config.getLogFilePermissions(), e));
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return false;
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}
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return true;
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}
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@Override
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public final void close()
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{
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writer.shutdown();
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TimeThread.removeUserDefinedFormatter(timeStampFormat);
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if (cfg != null)
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{
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cfg.removeFileBasedHTTPAccessChangeListener(this);
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}
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}
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@Override
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public final DN getDN()
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{
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return cfg != null ? cfg.dn() : null;
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}
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@Override
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public void logRequestInfo(HTTPRequestInfo ri)
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{
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final Map<String, Object> fields = new HashMap<>();
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fields.put(ELF_C_IP, ri.getClientAddress());
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fields.put(ELF_C_PORT, ri.getClientPort());
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fields.put(ELF_CS_HOST, ri.getClientHost());
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fields.put(ELF_CS_METHOD, ri.getMethod());
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fields.put(ELF_CS_URI_QUERY, ri.getQuery());
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fields.put(ELF_CS_USER_AGENT, ri.getUserAgent());
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fields.put(ELF_CS_USERNAME, ri.getAuthUser());
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fields.put(ELF_CS_VERSION, ri.getProtocol());
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fields.put(ELF_S_IP, ri.getServerAddress());
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fields.put(ELF_S_COMPUTERNAME, ri.getServerHost());
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fields.put(ELF_S_PORT, ri.getServerPort());
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fields.put(ELF_SC_STATUS, ri.getStatusCode());
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fields.put(X_CONNECTION_ID, ri.getConnectionID());
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fields.put(X_DATETIME, TimeThread.getUserDefinedTime(timeStampFormat));
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fields.put(X_ETIME, ri.getTotalProcessingTime());
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fields.put(X_TRANSACTION_ID, ri.getTransactionId());
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writeLogRecord(fields, logFormatFields);
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}
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private void writeLogRecord(Map<String, Object> fields,
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List<String> fieldnames)
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{
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if (fieldnames == null)
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{
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return;
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}
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final StringBuilder sb = new StringBuilder(100);
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for (String fieldname : fieldnames)
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{
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append(sb, fields.get(fieldname));
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}
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writer.writeRecord(sb.toString());
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}
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/**
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* Appends the value to the string builder using the default separator if needed.
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*
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* @param sb
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* the StringBuilder where to append.
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* @param value
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* the value to append.
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*/
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private void append(final StringBuilder sb, Object value)
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{
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final char separator = '\t'; // as encouraged by the W3C working draft
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if (sb.length() > 0)
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{
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sb.append(separator);
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}
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if (value != null)
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{
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String val = String.valueOf(value);
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boolean useQuotes = val.contains(Character.toString(separator));
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if (useQuotes)
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{
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sb.append('"').append(val.replaceAll("\"", "\"\"")).append('"');
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}
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else
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{
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sb.append(val);
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}
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}
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else
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{
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sb.append('-');
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}
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}
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}
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