August 1999
Intermediate to advanced
378 pages
11h 44m
English
Content preview from Programming Internet Email
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ACAP Sessions
An example ACAP session is shown in Figure 12-3. A client initiates an ACAP session to a server, which responds with a banner greeting. The client is now in the Nonauthenticated State since no authentication credentials have been presented. Following a successful login with CRAM-MD5 authentication, the session enters the Authenticated State.
Figure 12-3. A sample A CAP session
The first command issued in the Authenticated State is a SEARCH. The search looks for entries that have an email address in an attribute, much like the one shown in the 5'EARCH example, given previously. This time, however, a context is created with the NOTIFY modifier. Any changes to the context should be communicated to the client. This is tested by adding an entry (using a STORE command) incorporating another email address.
As soon as another entry is added that contains an email address, the server notifies the client (with the ADDTO response). We then free the context and log out.
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