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89 lines
4.0 KiB
Java
89 lines
4.0 KiB
Java
// Mozilla has modified this file - see http://hg.mozilla.org/ for details.
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mozilla.apache.commons.codec.binary;
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import java.io.OutputStream;
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/**
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* Provides Base64 encoding and decoding in a streaming fashion (unlimited size). When encoding the default lineLength
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* is 76 characters and the default lineEnding is CRLF, but these can be overridden by using the appropriate
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* constructor.
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* <p>
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* The default behaviour of the Base64OutputStream is to ENCODE, whereas the default behaviour of the Base64InputStream
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* is to DECODE. But this behaviour can be overridden by using a different constructor.
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* </p>
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* <p>
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* This class implements section <cite>6.8. Base64 Content-Transfer-Encoding</cite> from RFC 2045 <cite>Multipurpose
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* Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies</cite> by Freed and Borenstein.
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* </p>
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* <p>
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* Since this class operates directly on byte streams, and not character streams, it is hard-coded to only encode/decode
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* character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252, UTF-8, etc).
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* </p>
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*
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* @author Apache Software Foundation
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* @version $Id: Base64OutputStream.java 1064424 2011-01-28 02:02:46Z sebb $
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* @see <a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a>
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* @since 1.4
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*/
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public class Base64OutputStream extends BaseNCodecOutputStream {
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/**
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* Creates a Base64OutputStream such that all data written is Base64-encoded to the original provided OutputStream.
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*
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* @param out
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* OutputStream to wrap.
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*/
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public Base64OutputStream(OutputStream out) {
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this(out, true);
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}
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/**
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* Creates a Base64OutputStream such that all data written is either Base64-encoded or Base64-decoded to the
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* original provided OutputStream.
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*
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* @param out
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* OutputStream to wrap.
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* @param doEncode
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* true if we should encode all data written to us, false if we should decode.
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*/
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public Base64OutputStream(OutputStream out, boolean doEncode) {
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super(out,new Base64(false), doEncode);
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}
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/**
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* Creates a Base64OutputStream such that all data written is either Base64-encoded or Base64-decoded to the
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* original provided OutputStream.
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*
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* @param out
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* OutputStream to wrap.
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* @param doEncode
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* true if we should encode all data written to us, false if we should decode.
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* @param lineLength
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* If doEncode is true, each line of encoded data will contain lineLength characters (rounded down to
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* nearest multiple of 4). If lineLength <=0, the encoded data is not divided into lines. If doEncode is
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* false, lineLength is ignored.
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* @param lineSeparator
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* If doEncode is true, each line of encoded data will be terminated with this byte sequence (e.g. \r\n).
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* If lineLength <= 0, the lineSeparator is not used. If doEncode is false lineSeparator is ignored.
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*/
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public Base64OutputStream(OutputStream out, boolean doEncode, int lineLength, byte[] lineSeparator) {
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super(out, new Base64(lineLength, lineSeparator), doEncode);
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}
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} |