August 1999
Intermediate to advanced
378 pages
11h 44m
English
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Using ACAP
ACAP is an Internet-proposed standard and is currently in version 1.0. An ACAP server is a TCP application daemon that listens for ACAP client requests on TCP port 674. MUAs, Web browsers, or any other type of network-oriented application may implement an ACAP client.
Some commercial products have implemented ACAP’s predecessor, the Internet Messaging Support Protocol (IMSP) , but IMSP never made it into the standards track. Commercial ACAP servers are still in the works as of this writing.
ACAP clients must be able to work offline. They mayor may not connect to an ACAP server, depending on their needs. Typically, an ACAP client connects to a server when an application is started, and network access is available in order to determine if its configuration information is still current. This could (and probably should) be done in a thread to avoid long startup delays. Additional connections to a server are made when a user changes information that is held on the server; first the local cache is updated, and then the server is contacted at the next available opportunity.
Figure 12-1 shows an ACAP server and a possible relationship to an MUA, IMAP MRA, and IMAP client. In this scenario, an MUA implements both an IMAP and an ACAP client. The ACAP client is used to retrieve configuration information and address book data from an ACAP server. Since ACAP clients must be allowed to work offline, this communication does not necessarily have to occur upon MUA startup. An IMAP session ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.