/* * 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. *
* 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}
* .
* SMTPConectionClosedException
* is a subclass of IOException
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 IOException
* 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}.
*
* 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. *
*
* @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
* @param listener The ProtocolCommandListener to add.
***/
public void addProtocolCommandListener(ProtocolCommandListener listener)
{
_commandSupport_.addProtocolCommandListener(listener);
}
/***
* Removes a ProtocolCommandListener. Delegates this task to
* {@link #_commandSupport_ _commandSupport_ }.
*
* @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.
*
* @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 }.
*
* @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 }.
*
* @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 }.
*
* @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 }.
*
* @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
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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.
*
* @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: **
*/
DEFAULT_PORT
and initializes internal data structures
* for saving SMTP reply information.
***/
public SMTP()
{
setDefaultPort(DEFAULT_PORT);
__commandBuffer = new StringBuffer();
_replyLines = new ArrayList connect
is of type void.
*