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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.mail.util;

import java.io.*;
import java.nio.charset.StandardCharsets;

/**
 * This class is to support writing out Strings as a sequence of bytes
 * terminated by a CRLF sequence. The String must contain only US-ASCII
 * characters.

* * The expected use is to write out RFC822 style headers to an output * stream.

* * @author John Mani * @author Bill Shannon */ public class LineOutputStream extends FilterOutputStream { private boolean allowutf8; private static byte[] newline; static { newline = new byte[2]; newline[0] = (byte)'\r'; newline[1] = (byte)'\n'; } public LineOutputStream(OutputStream out) { this(out, false); } /** * @param out the OutputStream * @param allowutf8 allow UTF-8 characters? * @since JavaMail 1.6 */ public LineOutputStream(OutputStream out, boolean allowutf8) { super(out); this.allowutf8 = allowutf8; } public void writeln(String s) throws IOException { byte[] bytes; if (allowutf8) bytes = s.getBytes(StandardCharsets.UTF_8); else bytes = ASCIIUtility.getBytes(s); out.write(bytes); out.write(newline); } public void writeln() throws IOException { out.write(newline); } }





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