*
*/
@SuppressWarnings("unchecked")
@Override
public Response onCommand(POP3Session session, Request request) {
POP3Response response = null;
String parameters = request.getArgument();
if (parameters == null) {
response = new POP3Response(POP3Response.ERR_RESPONSE, "Usage: TOP [mail number] [Line number]");
return response;
}
String argument = "";
String argument1 = "";
int pos = parameters.indexOf(" ");
if (pos > 0) {
argument = parameters.substring(0, pos);
argument1 = parameters.substring(pos + 1);
}
if (session.getHandlerState() == POP3Session.TRANSACTION) {
int num = 0;
int lines = -1;
try {
num = Integer.parseInt(argument);
lines = Integer.parseInt(argument1);
} catch (NumberFormatException nfe) {
response = new POP3Response(POP3Response.ERR_RESPONSE, "Usage: TOP [mail number] [Line number]");
return response;
}
try {
List<Long> uidList = (List<Long>) session.getState().get(POP3Session.UID_LIST);
List<Long> deletedUidList = (List<Long>) session.getState().get(POP3Session.DELETED_UID_LIST);
MailboxSession mailboxSession = (MailboxSession) session.getState().get(POP3Session.MAILBOX_SESSION);
Long uid = uidList.get(num - 1);
if (deletedUidList.contains(uid) == false) {
FetchGroupImpl fetchGroup = new FetchGroupImpl(FetchGroup.BODY_CONTENT);
fetchGroup.or(FetchGroup.HEADERS);
Iterator<MessageResult> results = session.getUserMailbox().getMessages(MessageRange.one(uid), fetchGroup, mailboxSession);
MessageStream stream = new MessageStream();
OutputStream out = stream.getOutputStream();
OutputStream extraDotOut = new ExtraDotOutputStream(out);
out.write((POP3Response.OK_RESPONSE + " Message follows\r\n").getBytes());
out.flush();
// response = new POP3Response(POP3Response.OK_RESPONSE,
// "Message follows");
try {
MessageResult result = results.next();
WritableByteChannel outChannel = Channels.newChannel(extraDotOut);
// write headers
Iterator<Header> headers = result.headers();
while (headers.hasNext()) {
headers.next().writeTo(outChannel);
// we need to write out the CRLF after each header
extraDotOut.write("\r\n".getBytes());
}
// headers and body are seperated by a CRLF
extraDotOut.write("\r\n".getBytes());
// write body
result.getBody().writeTo(Channels.newChannel(new CountingBodyOutputStream(extraDotOut, lines)));
} finally {
extraDotOut.flush();
// write a single dot to mark message as complete
out.write((".\r\n").getBytes());
out.flush();
extraDotOut.close();
out.close();
}
session.writeStream(stream.getInputStream());
return null;
} else {
StringBuilder responseBuffer = new StringBuilder(64).append("Message (").append(num).append(") already deleted.");
response = new POP3Response(POP3Response.ERR_RESPONSE, responseBuffer.toString());
}
} catch (IOException ioe) {
response = new POP3Response(POP3Response.ERR_RESPONSE, "Error while retrieving message.");
} catch (MessagingException me) {
response = new POP3Response(POP3Response.ERR_RESPONSE, "Error while retrieving message.");
} catch (IndexOutOfBoundsException iob) {
StringBuilder exceptionBuffer = new StringBuilder(64).append("Message (").append(num).append(") does not exist.");
response = new POP3Response(POP3Response.ERR_RESPONSE, exceptionBuffer.toString());
} catch (Exception e) {
e.printStackTrace();
}
} else {
response = new POP3Response(POP3Response.ERR_RESPONSE);
}
return response;
}