sonews-drupal: src/org/sonews/util/io/SMTPOutputStream.java@b723308e1359

     1 /*

     2 GNU-Classpath Extensions: javamail

     3 Copyright (C) 2002 Chris Burdess

     5 For more information on the classpathx please mail:

     6 nferrier@tapsellferrier.co.uk

     8 This program is free software; you can redistribute it and/or

     9 modify it under the terms of the GNU Lesser General Public License

    10 as published by the Free Software Foundation; either version 2

    11 of the License, or (at your option) any later version.

    13 This program is distributed in the hope that it will be useful,

    14 but WITHOUT ANY WARRANTY; without even the implied warranty of

    15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    16 GNU General Public License for more details.

    18 You should have received a copy of the GNU General Public License

    19 along with this program; if not, write to the Free Software

    20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    21  */

    22 package org.sonews.util.io; // original package: gnu.mail.providers.smtp

    24 import java.io.FilterOutputStream;

    25 import java.io.IOException;

    27 /**

    28  * An output stream implementing the SMTP specification for dot escaping.

    29  * Objects of this class are intended to be chained with CRLFOutputStream

    30  * instances as all SMTP output is intended to be CRLF-escaped.

    31  *

    32  * @author dog@gnu.org

    33  * @version 0.1

    34  */

    35 public class SMTPOutputStream extends FilterOutputStream {

    37 	/**

    38 	 * The LF octet.

    39 	 */

    40 	public static final int LF = 0x0a;

    41 	/**

    42 	 * The dot octet.

    43 	 */

    44 	public static final int DOT = 0x2e;

    45 	/**

    46 	 * The last octet read.

    47 	 */

    48 	protected int last;

    50 	/**

    51 	 * Constructs an SMTP output stream connected to the specified output stream.

    52 	 * The underlying output stream should coordinate proper CRLF pairs at

    53 	 * line ends.

    54 	 * @param out a CRLFOutputStream

    55 	 */

    56 	public SMTPOutputStream(CRLFOutputStream out) {

    57 		super(out);

    58 	}

    60 	/**

    61 	 * Writes a character to the underlying stream.

    62 	 * @exception IOException if an I/O error occurred

    63 	 */

    64 	@Override

    65 	public void write(int ch) throws IOException {

    66 		if (ch == DOT) {

    67 			if (last == LF) {

    68 				out.write(DOT);

    69 			}

    70 		}

    71 		out.write(ch);

    72 		last = ch;

    73 	}

    75 	/**

    76 	 * Writes a byte array to the underlying stream.

    77 	 * @exception IOException if an I/O error occurred

    78 	 */

    79 	@Override

    80 	public void write(byte b[]) throws IOException {

    81 		write(b, 0, b.length);

    82 	}

    84 	/**

    85 	 * Writes a portion of a byte array to the underlying stream.

    86 	 * @exception IOException if an I/O error occurred

    87 	 */

    88 	@Override

    89 	public void write(byte b[], int off, int len) throws IOException {

    90 		int d = off;

    91 		len += off;

    92 		for (int i = off; i < len; i++) {

    93 			switch (b[i]) {

    94 				case DOT:

    95 					int l = (i - d);

    96 					if (l > 0) {

    97 						out.write(b, d, l);

    98 					}

    99 					d = i;

   100 					if (last == LF) {

   101 						out.write(DOT);

   102 					}

   103 					break;

   104 			}

   105 			last = b[i];

   106 		}

   107 		if (len - d > 0) {

   108 			out.write(b, d, len - d);

   109 		}

   110 	}

   111 }

author	František Kučera <franta-hg@frantovo.cz>
	Tue Oct 25 10:16:13 2011 +0200 (2011-10-25)
changeset 107	b723308e1359
permissions	-rw-r--r--