69244 - POP downloads should save progress.

Status: VERIFIED FIXED

(MailNews Core :: Networking: POP, enhancement)

Description

[Matthew Tuck [:CodeMachine]]

If a POP download fails (eg by disconnection) half way through you shouldn't
have to download all of the messages again.  POP downloads should save their
status so no or a small number of messages have to be redownloaded.  See also
bug #9413.

Whether this is through sending delete message commands every x number of
messages, disconnecting and reconnecting transparently to the user, tracking
message IDs on the client, or whatever, I don't care.

Of course it would need to work regardless of your server-delete-message
settings.

Currently to work around this I have to periodically cancel and redownload my
messages (I receive ~1000 msgs a day and am on a modem).

I've seen the situation with my POP server where if I cancel the download and
restart too quickly it downloads everything again.  I'm not sure if this is a
bug in N4.6 or a bug in the POP server which might affect the implementation of
this.

Comment 1

[Keyser Sose]

*** This bug has been marked as a duplicate of 67799 ***

Comment 2

[Matthew Tuck [:CodeMachine]]

I don't consider this a duplicate.

That bug is about what happens if you press CANCEL part way through.  That
worked in N4 and is a serious bug.

This bug is about what happens when the POP connection drops out without the
user requesting it.  This never worked properly in N4, but is liveable by
occasionally using the CANCEL button (which, ergo, needs to work).

Comment 3

[Keyser Sose]

After some discussion with bz on #qa we have decided to mark this as a
dependency on 67799 so once that code is added we can put it into this problem.

Comment 4

[Navin Gupta]

The fix for #67799 was to save the download progress. I think this bug should 
be fixed as a result of fixing #67799. 

Any ideas on how we can drop the POP3 connection without hitting "Stop", to 
verify this bug

Comment 5

[Matthew Tuck [:CodeMachine]]

Well you might try pulling out your network and then pressing cancel.

I'm wondering what will happen though if you have it set to delete the messages
on the server.  Are they incrementally deleted, or are will they be deleted next
time you make a connection?

Comment 6

[Navin Gupta]

They will be deleted next time you make a connection.

Comment 7

[Navin Gupta]

The fix was #67799 that saves the download progess does it also when the 
TCP/IP connection is dropped. Verified on winNT and linux. Marking fixed.

Comment 8

[Sheela Ravindran]

Verified this bug while verifying for 67799. Checked that hitting stop saves the 
download progress. I am verifying this based on bug 67799. 
buildid: 2001042606 win98,2001042609 mac, 2001041908 linux