/**
* Copyright (c) 2011-2012 Optimax Software Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Optimax Software, ElasticInbox, nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.elasticinbox.lmtp.server.api.handler;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.james.protocols.api.Response;
import org.apache.james.protocols.api.handler.WiringException;
import org.apache.james.protocols.lmtp.LMTPMultiResponse;
import org.apache.james.protocols.lmtp.core.DataLineMessageHookHandler;
import org.apache.james.protocols.smtp.MailAddress;
import org.apache.james.protocols.smtp.MailEnvelopeImpl;
import org.apache.james.protocols.smtp.SMTPResponse;
import org.apache.james.protocols.smtp.SMTPRetCode;
import org.apache.james.protocols.smtp.SMTPSession;
import org.apache.james.protocols.smtp.dsn.DSNStatus;
import com.elasticinbox.lmtp.delivery.IDeliveryAgent;
import com.elasticinbox.lmtp.server.api.DeliveryReturnCode;
/**
* Default class that extends the {@link AbstractDeliveryHandler} class.
* Provides a default implementation for mail delivery.
*
* @author Rustam Aliyev
*/
public class ElasticInboxDeliveryHandler extends DataLineMessageHookHandler
{
private final IDeliveryAgent backend;
public ElasticInboxDeliveryHandler(IDeliveryAgent backend) {
this.backend = backend;
}
@Override
protected Response processExtensions(SMTPSession session, MailEnvelopeImpl env)
{
// tracing
if (session.getLogger().isTraceEnabled()) {
logMessage(session, env);
}
Map<MailAddress, DeliveryReturnCode> replies;
// deliver message
try {
replies = backend.deliver(env, session.getSessionID());
} catch (IOException e) {
// TODO: Handle me
replies = new HashMap<MailAddress, DeliveryReturnCode>();
for (MailAddress address : env.getRecipients()) {
replies.put(address, DeliveryReturnCode.TEMPORARY_FAILURE);
}
}
LMTPMultiResponse lmtpResponse = null;
for (MailAddress address : replies.keySet())
{
DeliveryReturnCode code = replies.get(address);
SMTPResponse response;
switch (code) {
case OK:
response = new SMTPResponse(SMTPRetCode.MAIL_OK,
DSNStatus.getStatus(DSNStatus.SUCCESS, DSNStatus.UNDEFINED_STATUS)
+ " Ok");
break;
case NO_SUCH_USER:
response = new SMTPResponse(SMTPRetCode.MAILBOX_PERM_UNAVAILABLE,
DSNStatus.getStatus(DSNStatus.PERMANENT, DSNStatus.ADDRESS_MAILBOX)
+ " Unknown user " + address.toString());
break;
case OVER_QUOTA:
response = new SMTPResponse(SMTPRetCode.QUOTA_EXCEEDED,
DSNStatus.getStatus(DSNStatus.PERMANENT, DSNStatus.MAILBOX_FULL)
+ " User over quota");
break;
case PERMANENT_FAILURE:
response = new SMTPResponse(SMTPRetCode.TRANSACTION_FAILED,
DSNStatus.getStatus(DSNStatus.PERMANENT, DSNStatus.SYSTEM_OTHER)
+ " Unable to deliver message");
break;
case TEMPORARY_FAILURE:
response = new SMTPResponse(SMTPRetCode.LOCAL_ERROR,
DSNStatus.getStatus(DSNStatus.TRANSIENT, DSNStatus.SYSTEM_OTHER)
+ " Unable to process request");
break;
default:
response = new SMTPResponse(SMTPRetCode.LOCAL_ERROR,
DSNStatus.getStatus(DSNStatus.TRANSIENT, DSNStatus.SYSTEM_OTHER)
+ " Unable to process request");
break;
}
if (lmtpResponse == null) {
lmtpResponse = new LMTPMultiResponse(response);
} else {
lmtpResponse.addResponse(response);
}
}
return lmtpResponse;
}
@SuppressWarnings("rawtypes")
@Override
public void wireExtensions(Class interfaceName, List extension) throws WiringException {
// do nothing
}
@Override
protected void checkMessageHookCount(List<?> messageHandlers) throws WiringException {
// do noting
}
@Override
public List<Class<?>> getMarkerInterfaces() {
return Collections.emptyList();
}
/**
* Log message contents
*
* @param env
*/
private void logMessage(SMTPSession session, MailEnvelopeImpl env)
{
Charset charset = Charset.forName("US-ASCII");
try {
InputStream in = env.getMessageInputStream();
byte[] buf = new byte[16384];
CharsetDecoder decoder = charset.newDecoder();
int len = 0;
while ((len = in.read(buf)) >= 0) {
session.getLogger().trace(decoder.decode(ByteBuffer.wrap(buf, 0, len)).toString());
}
} catch (IOException ioex) {
session.getLogger().debug("Mail data logging failed", ioex);
}
}
}