JMeter example source code file (Base64Encoder.java)

This example JMeter source code file (Base64Encoder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

base64encoder, base64encoder, string, string, stringbuilder, stringbuilder, todo, todo

The JMeter Base64Encoder.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.jmeter.protocol.http.util;

/**
 * This class provides an implementation of Base64 encoding without relying on
 * the the sun.* packages.
 *
 * @version $Revision: 937662 $
 */
public final class Base64Encoder {
    private final static char[] pem_array = { 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82,
            83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
            112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 43, 47 };

    private final static char eq = 61;

    /**
     * Private constructor to prevent instantiation.
     */
    private Base64Encoder() {
    }

    public final static String encode(String s) {
        return encode(s.getBytes()); // TODO - charset?
    }

    public final static String encode(byte[] bs) {
        StringBuilder out = new StringBuilder();
        int bl = bs.length;
        for (int i = 0; i < bl; i += 3) {
            out.append(encodeAtom(bs, i, (bl - i)));
        }
        return out.toString();
    }

    public final static String encodeAtom(byte[] b, int strt, int left) {
        StringBuilder out = new StringBuilder();
        if (left == 1) {
            byte b1 = b[strt];
            int k = 0;
            out.append(String.valueOf(pem_array[b1 >>> 2 & 63]));
            out.append(String.valueOf(pem_array[(b1 << 4 & 48) + (k >>> 4 & 15)]));
            out.append(String.valueOf(eq));
            out.append(String.valueOf(eq));
            return out.toString();
        }
        if (left == 2) {
            byte b2 = b[strt];
            byte b4 = b[strt + 1];
            int l = 0;
            out.append(String.valueOf(pem_array[b2 >>> 2 & 63]));
            out.append(String.valueOf(pem_array[(b2 << 4 & 48) + (b4 >>> 4 & 15)]));
            out.append(String.valueOf(pem_array[(b4 << 2 & 60) + (l >>> 6 & 3)]));
            out.append(String.valueOf(eq));
            return out.toString();
        }
        byte b3 = b[strt];
        byte b5 = b[strt + 1];
        byte b6 = b[strt + 2];
        out.append(String.valueOf(pem_array[b3 >>> 2 & 63]));
        out.append(String.valueOf(pem_array[(b3 << 4 & 48) + (b5 >>> 4 & 15)]));
        out.append(String.valueOf(pem_array[(b5 << 2 & 60) + (b6 >>> 6 & 3)]));
        out.append(String.valueOf(pem_array[b6 & 63]));
        return out.toString();
    }
}