LogStrTok.java Source code

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Here is the source code for LogStrTok.java

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/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.util.*;

/**
 * Parse an Apache log file with StringTokenizer
 */
public class LogStrTok implements LogExample {
    public static void main(String argv[]) {

        StringTokenizer matcher = new StringTokenizer(logEntryLine);

        System.out.println("tokens = " + matcher.countTokens());
        // StringTokenizer CAN NOT count if you are changing the delimiter!
        // if (matcher.countTokens() != NUM_FIELDS) {
        //    System.err.println("Bad log entry (or bug in StringTokenizer?):");
        //    System.err.println(logEntryLine);
        // }

        System.out.println("Hostname: " + matcher.nextToken());
        // StringTokenizer makes you ask for tokens in order to skip them:
        matcher.nextToken(); // eat the "-"
        matcher.nextToken(); // again
        System.out.println("Date/Time: " + matcher.nextToken("]"));
        //matcher.nextToken(" "); // again
        System.out.println("Request: " + matcher.nextToken("\""));
        matcher.nextToken(" "); // again
        System.out.println("Response: " + matcher.nextToken());
        System.out.println("ByteCount: " + matcher.nextToken());
        System.out.println("Referer: " + matcher.nextToken("\""));
        matcher.nextToken(" "); // again
        System.out.println("User-Agent: " + matcher.nextToken("\""));
    }
}

/**
 * Common fields for Apache Log demo.
 */
interface LogExample {
    /** The number of fields that must be found. */
    public static final int NUM_FIELDS = 9;

    /** The sample log entry to be parsed. */
    public static final String logEntryLine = "123.45.67.89 - - [27/Oct/2000:09:27:09 -0400] \"GET /java/javaResources.html HTTP/1.0\" 200 10450 \"-\" \"Mozilla/4.6 [en] (X11; U; OpenBSD 2.8 i386; Nav)\"";

}