Ant example source code file (SmtpResponseReader.java)

This example Ant source code file (SmtpResponseReader.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 - Ant tags/keywords

bufferedreader, bufferedreader, inputstreamreader, io, ioexception, ioexception, smtpresponsereader, smtpresponsereader, string, stringbuffer, stringbuffer

The SmtpResponseReader.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.tools.mail;

import java.io.InputStream;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * A wrapper around the raw input from the SMTP server that assembles
 * multi line responses into a single String.
 *
 * <p>The same rules used here would apply to FTP and other Telnet
 * based protocols as well.</p>
 *
 */
public class SmtpResponseReader {
    // CheckStyle:VisibilityModifier OFF - bc
    protected BufferedReader reader = null;
    // CheckStyle:VisibilityModifier ON
    private StringBuffer result = new StringBuffer();

    /**
     * Wrap this input stream.
     * @param in the stream to wrap.
     */
    public SmtpResponseReader(InputStream in) {
        reader = new BufferedReader(new InputStreamReader(in));
    }

    /**
     * Read until the server indicates that the response is complete.
     *
     * @return Responsecode (3 digits) + Blank + Text from all
     *         response line concatenated (with blanks replacing the \r\n
     *         sequences).
     * @throws IOException on error.
     */
    public String getResponse() throws IOException {
        result.setLength(0);
        String line = reader.readLine();
        if (line != null && line.length() >= 3) {
            result.append(line.substring(0, 3));
            result.append(" ");
        }

        while (line != null) {
            append(line);
            if (!hasMoreLines(line)) {
                break;
            }
            line = reader.readLine();
        }
        return result.toString().trim();
    }

    /**
     * Closes the underlying stream.
     * @throws IOException on error.
     */
    public void close() throws IOException {
        reader.close();
    }

    /**
     * Should we expect more input?
     * @param line the line to check.
     * @return true if there are more lines to check.
     */
    protected boolean hasMoreLines(String line) {
        return line.length() > 3 && line.charAt(3) == '-';
    }

    /**
     * Append the text from this line of the resonse.
     */
    private void append(String line) {
        if (line.length() > 4) {
            result.append(line.substring(4));
            result.append(" ");
        }
    }
}