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-/*
- * 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.commons.net.smtp;
-
-import java.io.BufferedReader;
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
-import java.util.ArrayList;
-import java.util.Arrays;
-
-import org.apache.commons.net.MalformedServerReplyException;
-import org.apache.commons.net.ProtocolCommandListener;
-import org.apache.commons.net.ProtocolCommandSupport;
-import org.apache.commons.net.SocketClient;
-
-/***
- * SMTP provides the basic the functionality necessary to implement your
- * own SMTP client. To derive the full benefits of the SMTP class requires
- * some knowledge of the FTP protocol defined in RFC 821. However, there
- * is no reason why you should have to use the SMTP class. The
- * {@link org.apache.commons.net.smtp.SMTPClient} class,
- * derived from SMTP,
- * implements all the functionality required of an SMTP client. The
- * SMTP class is made public to provide access to various SMTP constants
- * and to make it easier for adventurous programmers (or those with
- * special needs) to interact with the SMTP protocol and implement their
- * own clients. A set of methods with names corresponding to the SMTP
- * command names are provided to facilitate this interaction.
- * <p>
- * You should keep in mind that the SMTP server may choose to prematurely
- * close a connection for various reasons. The SMTP class will detect a
- * premature SMTP server connection closing when it receives a
- * {@link org.apache.commons.net.smtp.SMTPReply#SERVICE_NOT_AVAILABLE SMTPReply.SERVICE_NOT_AVAILABLE }
- * response to a command.
- * When that occurs, the SMTP class method encountering that reply will throw
- * an {@link org.apache.commons.net.smtp.SMTPConnectionClosedException}
- * .
- * <code>SMTPConectionClosedException</code>
- * is a subclass of <code> IOException </code> and therefore need not be
- * caught separately, but if you are going to catch it separately, its
- * catch block must appear before the more general <code> IOException </code>
- * catch block. When you encounter an
- * {@link org.apache.commons.net.smtp.SMTPConnectionClosedException}
- * , you must disconnect the connection with
- * {@link org.apache.commons.net.SocketClient#disconnect disconnect() }
- * to properly clean up the system resources used by SMTP. Before
- * disconnecting, you may check the
- * last reply code and text with
- * {@link #getReplyCode getReplyCode },
- * {@link #getReplyString getReplyString },
- * and {@link #getReplyStrings getReplyStrings}.
- * <p>
- * Rather than list it separately for each method, we mention here that
- * every method communicating with the server and throwing an IOException
- * can also throw a
- * {@link org.apache.commons.net.MalformedServerReplyException}
- * , which is a subclass
- * of IOException. A MalformedServerReplyException will be thrown when
- * the reply received from the server deviates enough from the protocol
- * specification that it cannot be interpreted in a useful manner despite
- * attempts to be as lenient as possible.
- * <p>
- * <p>
- * @author Daniel F. Savarese
- * @see SMTPClient
- * @see SMTPConnectionClosedException
- * @see org.apache.commons.net.MalformedServerReplyException
- ***/
-
-public class SMTP extends SocketClient
-{
- /*** The default SMTP port (25). ***/
- public static final int DEFAULT_PORT = 25;
-
- // We have to ensure that the protocol communication is in ASCII
- // but we use ISO-8859-1 just in case 8-bit characters cross
- // the wire.
- private static final String __DEFAULT_ENCODING = "ISO-8859-1";
-
- /** The encoding to use (user-settable) */
- private String encoding = __DEFAULT_ENCODING;
-
- private StringBuffer __commandBuffer;
-
- BufferedReader _reader;
- BufferedWriter _writer;
- int _replyCode;
- ArrayList<String> _replyLines;
- boolean _newReplyString;
- String _replyString;
-
- /***
- * A ProtocolCommandSupport object used to manage the registering of
- * ProtocolCommandListeners and te firing of ProtocolCommandEvents.
- ***/
- protected ProtocolCommandSupport _commandSupport_;
-
- /***
- * The default SMTP constructor. Sets the default port to
- * <code>DEFAULT_PORT</code> and initializes internal data structures
- * for saving SMTP reply information.
- ***/
- public SMTP()
- {
- setDefaultPort(DEFAULT_PORT);
- __commandBuffer = new StringBuffer();
- _replyLines = new ArrayList<String>();
- _newReplyString = false;
- _replyString = null;
- _commandSupport_ = new ProtocolCommandSupport(this);
- }
-
- /**
- * Overloaded constructor where the user may specify a default encoding.
- * @param encoding
- * @since 2.0
- */
- public SMTP(String encoding) {
- this();
- this.encoding = encoding;
- }
-
- private int __sendCommand(String command, String args, boolean includeSpace)
- throws IOException
- {
- String message;
-
- __commandBuffer.setLength(0);
- __commandBuffer.append(command);
-
- if (args != null)
- {
- if (includeSpace)
- __commandBuffer.append(' ');
- __commandBuffer.append(args);
- }
-
- __commandBuffer.append(SocketClient.NETASCII_EOL);
-
- _writer.write(message = __commandBuffer.toString());
- _writer.flush();
-
- if (_commandSupport_.getListenerCount() > 0)
- _commandSupport_.fireCommandSent(command, message);
-
- __getReply();
- return _replyCode;
- }
-
- private int __sendCommand(int command, String args, boolean includeSpace)
- throws IOException
- {
- return __sendCommand(SMTPCommand._commands[command], args, includeSpace);
- }
-
- private void __getReply() throws IOException
- {
- int length;
-
- _newReplyString = true;
- _replyLines.clear();
-
- String line = _reader.readLine();
-
- if (line == null)
- throw new SMTPConnectionClosedException(
- "Connection closed without indication.");
-
- // In case we run into an anomaly we don't want fatal index exceptions
- // to be thrown.
- length = line.length();
- if (length < 3)
- throw new MalformedServerReplyException(
- "Truncated server reply: " + line);
-
- try
- {
- String code = line.substring(0, 3);
- _replyCode = Integer.parseInt(code);
- }
- catch (NumberFormatException e)
- {
- throw new MalformedServerReplyException(
- "Could not parse response code.\nServer Reply: " + line);
- }
-
- _replyLines.add(line);
-
- // Get extra lines if message continues.
- if (length > 3 && line.charAt(3) == '-')
- {
- do
- {
- line = _reader.readLine();
-
- if (line == null)
- throw new SMTPConnectionClosedException(
- "Connection closed without indication.");
-
- _replyLines.add(line);
-
- // The length() check handles problems that could arise from readLine()
- // returning too soon after encountering a naked CR or some other
- // anomaly.
- }
- while (!(line.length() >= 4 && line.charAt(3) != '-' &&
- Character.isDigit(line.charAt(0))));
- // This is too strong a condition because a non-conforming server
- // could screw things up like ftp.funet.fi does for FTP
- // line.startsWith(code)));
- }
-
- if (_commandSupport_.getListenerCount() > 0)
- _commandSupport_.fireReplyReceived(_replyCode, getReplyString());
-
- if (_replyCode == SMTPReply.SERVICE_NOT_AVAILABLE)
- throw new SMTPConnectionClosedException(
- "SMTP response 421 received. Server closed connection.");
- }
-
- /*** Initiates control connections and gets initial reply. ***/
- @Override
- protected void _connectAction_() throws IOException
- {
- super._connectAction_();
- _reader =
- new BufferedReader(new InputStreamReader(_input_,
- encoding));
- _writer =
- new BufferedWriter(new OutputStreamWriter(_output_,
- encoding));
- __getReply();
-
- }
-
-
- /***
- * Adds a ProtocolCommandListener. Delegates this task to
- * {@link #_commandSupport_ _commandSupport_ }.
- * <p>
- * @param listener The ProtocolCommandListener to add.
- ***/
- public void addProtocolCommandListener(ProtocolCommandListener listener)
- {
- _commandSupport_.addProtocolCommandListener(listener);
- }
-
- /***
- * Removes a ProtocolCommandListener. Delegates this task to
- * {@link #_commandSupport_ _commandSupport_ }.
- * <p>
- * @param listener The ProtocolCommandListener to remove.
- ***/
- public void removeProtocolCommandistener(ProtocolCommandListener listener)
- {
- _commandSupport_.removeProtocolCommandListener(listener);
- }
-
-
- /***
- * Closes the connection to the SMTP server and sets to null
- * some internal data so that the memory may be reclaimed by the
- * garbage collector. The reply text and code information from the
- * last command is voided so that the memory it used may be reclaimed.
- * <p>
- * @exception IOException If an error occurs while disconnecting.
- ***/
- @Override
- public void disconnect() throws IOException
- {
- super.disconnect();
- _reader = null;
- _writer = null;
- _replyString = null;
- _replyLines.clear();
- _newReplyString = false;
- }
-
-
- /***
- * Sends an SMTP command to the server, waits for a reply and returns the
- * numerical response code. After invocation, for more detailed
- * information, the actual reply text can be accessed by calling
- * {@link #getReplyString getReplyString } or
- * {@link #getReplyStrings getReplyStrings }.
- * <p>
- * @param command The text representation of the SMTP command to send.
- * @param args The arguments to the SMTP command. If this parameter is
- * set to null, then the command is sent with no argument.
- * @return The integer value of the SMTP reply code returned by the server
- * in response to the command.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int sendCommand(String command, String args) throws IOException
- {
- return __sendCommand(command, args, true);
- }
-
-
- /***
- * Sends an SMTP command to the server, waits for a reply and returns the
- * numerical response code. After invocation, for more detailed
- * information, the actual reply text can be accessed by calling
- * {@link #getReplyString getReplyString } or
- * {@link #getReplyStrings getReplyStrings }.
- * <p>
- * @param command The SMTPCommand constant corresponding to the SMTP command
- * to send.
- * @param args The arguments to the SMTP command. If this parameter is
- * set to null, then the command is sent with no argument.
- * @return The integer value of the SMTP reply code returned by the server
- * in response to the command.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int sendCommand(int command, String args) throws IOException
- {
- return sendCommand(SMTPCommand._commands[command], args);
- }
-
-
- /***
- * Sends an SMTP command with no arguments to the server, waits for a
- * reply and returns the numerical response code. After invocation, for
- * more detailed information, the actual reply text can be accessed by
- * calling {@link #getReplyString getReplyString } or
- * {@link #getReplyStrings getReplyStrings }.
- * <p>
- * @param command The text representation of the SMTP command to send.
- * @return The integer value of the SMTP reply code returned by the server
- * in response to the command.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int sendCommand(String command) throws IOException
- {
- return sendCommand(command, null);
- }
-
-
- /***
- * Sends an SMTP command with no arguments to the server, waits for a
- * reply and returns the numerical response code. After invocation, for
- * more detailed information, the actual reply text can be accessed by
- * calling {@link #getReplyString getReplyString } or
- * {@link #getReplyStrings getReplyStrings }.
- * <p>
- * @param command The SMTPCommand constant corresponding to the SMTP command
- * to send.
- * @return The integer value of the SMTP reply code returned by the server
- * in response to the command.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int sendCommand(int command) throws IOException
- {
- return sendCommand(command, null);
- }
-
-
- /***
- * Returns the integer value of the reply code of the last SMTP reply.
- * You will usually only use this method after you connect to the
- * SMTP server to check that the connection was successful since
- * <code> connect </code> is of type void.
- * <p>
- * @return The integer value of the reply code of the last SMTP reply.
- ***/
- public int getReplyCode()
- {
- return _replyCode;
- }
-
- /***
- * Fetches a reply from the SMTP server and returns the integer reply
- * code. After calling this method, the actual reply text can be accessed
- * from either calling {@link #getReplyString getReplyString } or
- * {@link #getReplyStrings getReplyStrings }. Only use this
- * method if you are implementing your own SMTP client or if you need to
- * fetch a secondary response from the SMTP server.
- * <p>
- * @return The integer value of the reply code of the fetched SMTP reply.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while receiving the
- * server reply.
- ***/
- public int getReply() throws IOException
- {
- __getReply();
- return _replyCode;
- }
-
-
- /***
- * Returns the lines of text from the last SMTP server response as an array
- * of strings, one entry per line. The end of line markers of each are
- * stripped from each line.
- * <p>
- * @return The lines of text from the last SMTP response as an array.
- ***/
- public String[] getReplyStrings()
- {
- String[] lines;
- lines = new String[_replyLines.size()];
- _replyLines.addAll(Arrays.asList(lines));
- return lines;
- }
-
- /***
- * Returns the entire text of the last SMTP server response exactly
- * as it was received, including all end of line markers in NETASCII
- * format.
- * <p>
- * @return The entire text from the last SMTP response as a String.
- ***/
- public String getReplyString()
- {
- StringBuilder buffer;
-
- if (!_newReplyString)
- return _replyString;
-
- buffer = new StringBuilder();
-
- for (String line : _replyLines)
- {
- buffer.append(line);
- buffer.append(SocketClient.NETASCII_EOL);
- }
-
- _newReplyString = false;
-
- return (_replyString = buffer.toString());
- }
-
-
- /***
- * A convenience method to send the SMTP HELO command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param hostname The hostname of the sender.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int helo(String hostname) throws IOException
- {
- return sendCommand(SMTPCommand.HELO, hostname);
- }
-
-
- /***
- * A convenience method to send the SMTP MAIL command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param reversePath The reverese path.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int mail(String reversePath) throws IOException
- {
- return __sendCommand(SMTPCommand.MAIL, reversePath, false);
- }
-
-
- /***
- * A convenience method to send the SMTP RCPT command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param forwardPath The forward path.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int rcpt(String forwardPath) throws IOException
- {
- return __sendCommand(SMTPCommand.RCPT, forwardPath, false);
- }
-
-
- /***
- * A convenience method to send the SMTP DATA command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int data() throws IOException
- {
- return sendCommand(SMTPCommand.DATA);
- }
-
-
- /***
- * A convenience method to send the SMTP SEND command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param reversePath The reverese path.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int send(String reversePath) throws IOException
- {
- return sendCommand(SMTPCommand.SEND, reversePath);
- }
-
-
- /***
- * A convenience method to send the SMTP SOML command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param reversePath The reverese path.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int soml(String reversePath) throws IOException
- {
- return sendCommand(SMTPCommand.SOML, reversePath);
- }
-
-
- /***
- * A convenience method to send the SMTP SAML command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param reversePath The reverese path.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int saml(String reversePath) throws IOException
- {
- return sendCommand(SMTPCommand.SAML, reversePath);
- }
-
-
- /***
- * A convenience method to send the SMTP RSET command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int rset() throws IOException
- {
- return sendCommand(SMTPCommand.RSET);
- }
-
-
- /***
- * A convenience method to send the SMTP VRFY command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param user The user address to verify.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int vrfy(String user) throws IOException
- {
- return sendCommand(SMTPCommand.VRFY, user);
- }
-
-
- /***
- * A convenience method to send the SMTP VRFY command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param name The name to expand.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int expn(String name) throws IOException
- {
- return sendCommand(SMTPCommand.EXPN, name);
- }
-
- /***
- * A convenience method to send the SMTP HELP command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int help() throws IOException
- {
- return sendCommand(SMTPCommand.HELP);
- }
-
- /***
- * A convenience method to send the SMTP HELP command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @param command The command name on which to request help.
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int help(String command) throws IOException
- {
- return sendCommand(SMTPCommand.HELP, command);
- }
-
- /***
- * A convenience method to send the SMTP NOOP command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int noop() throws IOException
- {
- return sendCommand(SMTPCommand.NOOP);
- }
-
-
- /***
- * A convenience method to send the SMTP TURN command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int turn() throws IOException
- {
- return sendCommand(SMTPCommand.TURN);
- }
-
-
- /***
- * A convenience method to send the SMTP QUIT command to the server,
- * receive the reply, and return the reply code.
- * <p>
- * @return The reply code received from the server.
- * @exception SMTPConnectionClosedException
- * If the SMTP server prematurely closes the connection as a result
- * of the client being idle or some other reason causing the server
- * to send SMTP reply code 421. This exception may be caught either
- * as an IOException or independently as itself.
- * @exception IOException If an I/O error occurs while either sending the
- * command or receiving the server reply.
- ***/
- public int quit() throws IOException
- {
- return sendCommand(SMTPCommand.QUIT);
- }
-
-}
-
-/* Emacs configuration
- * Local variables: **
- * mode: java **
- * c-basic-offset: 4 **
- * indent-tabs-mode: nil **
- * End: **
- */