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RE: Persistent connections: aborting requests in progress.

From: <Mike_Spreitzer.PARC@xerox.com>
Date: Tue, 26 Sep 1995 13:41:44 PDT
To: ses@tipper.oit.unc.edu
Cc: http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
Message-Id: <95Sep26.134222pdt."15324(6)"@alpha.xerox.com>
In your message of Mon, 11 Sep 1995 20:24:45 -0700, you mentioned a problem
with cancels in an interleaved setting, such as your SCP:

``This can work, and is the strategy used in HTTP-NG for cancels and
suspends; however there are a few problems. The main problem is that
due to the ordered delivery of TCP Messages, any outstanding requests
must be parsed before you get to the cancel/suspend. A side problem is
that any data that has been placed in the send buffer by the server still
gets written, even if the data has been delivered.''

Presumably this could be handled by complexifying SCP to have a way for a
client to get to TCP Urgent Data, sending along at the SCP layer enough
additional state for the receiver to detect what's been skipped.
Received on Tuesday, 26 September 1995 13:45:50 UTC

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