Re: mail-in db/app
Re: mail-in db/app
- Subject: Re: mail-in db/app
- From: Uli Kusterer <email@hidden>
- Date: Tue, 2 Oct 2007 10:01:45 +0200
Am 01.10.2007 um 20:48 schrieb René v Amerongen:
Just POP3.
POP3 itself is pretty easy. It's a protocol that was designed to be
typed in manually by humans, and hence, it's pretty easy to just look
at the POP3 RFC documentation and write your app to send/receive the
command. The thing where it becomes difficult is parsing the actual
messages themselves: The RFC 822 message format and its extensions
(MIME etc.) are quite involved, and if you want to handle all that
correctly, you'll have a bunch of work ahead of you. If you want to
also handle all messages that some of the less standards-compliant
mail clients may throw at you, you'll have even more work.
For cocoa, I did found only pantomine, and that's to heavy.
Well, it's intended to be used for cloning an application like
Mail.app, and last I checked, PantoMIME was very lightweight if you
considered that.
I was also looking for a blog or article about this subject.
Well, I only know a German page from Mannheim University:
http://krum.rz.uni-mannheim.de/inet-2003/
And that only demonstrates SMTP. But as I said, the protocol was
designed for humans. Generally you send a line, get a line (or
several). The RFCs are also pretty nicely written.
Like firewall issues, sockets e.t.c. Just to get better and more
informed.
Well, sockets are a Unix standard thing, so you can probably get a
good book on Unix sockets and that'll inform you much more than
anyone here can. There's not much Firewall stuff you should have to
do: Your application is making an outgoing connection, and the server
should have the right ports open. It should Jsut Wrok(tm).
One Cocoa-specific trick: After you've opened the socket, create an
NSFileHandle for your connection. That makes reading/writing much
more convenient. I just wrote myself wrappers for line-wise reading
of ASCII strings and put them in an object of my own that owns the
NSFileHandle. Worked beautifully. Also, keep in mind to do all this
stuff on a second thread, so the user can use the GUI even while
you're downloading e-mail.
That said, there's a couple of URL connection and socket classes
out there that might also be handy.
Cheers,
-- M. Uli Kusterer
http://www.zathras.de
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