Newsgroups : Borland : borland.public.delphi.internet.winsock : 2008 Jan : Re: how to abort current i/o TidPOP3 operation?

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Re: how to abort current i/o TidPOP3 operation?

Subject:Re: how to abort current i/o TidPOP3 operation?
Posted by:"Remy Lebeau (TeamB)" (no.spam@no.spam.com)
Date:Thu, 24 Jan 2008 13:49:19

"Iliya" <iliya00@list.ru> wrote in message
news:4798f8fb@newsgroups.borland.com...

> Does that mean that pop3 standard is incapable
> of the abort operation?

There is no abort operation in the POP3 protocol.  Like many Internet
protocols, POP3 is a synchrnous command/response protocol that runs over a
single TCP/IP connection.  While that connection is doing something, it
can't do anything else.  There is no way to abort a data exchange midway
other than to close the connection.  There is a RSET command in the POP3
protocol, but it has to be used within the command/response model like any
other command.  Once the message data being transfering, a RSET command
won't be processed until after the data has finished.


Gambit

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