September 2001
Intermediate to advanced
400 pages
11h 23m
English
Content preview from Palm OS Network Programming
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Designing FtpView
FtpView is a limited FTP client application
created
in this book, which provides only enough functionality to demonstrate
the usage of TCP sockets. We demonstrate establishing and accepting
connections and exchanging data over these connections.
FtpView illustrates these techniques by
supporting login to an FTP server, listing the server’s current
directory, and logging out from the server.
Functional Analysis
FtpView provides moderate, read-only access to
FTP servers. We
develop this application in Chapter 6 through Chapter 12.
When complete, FtpView will allow the user to
log in to and out from the FTP server, and retrieve the listing of
files in the server’s root directory. Figure 3-1 shows the application flow for
FtpView.
Figure 3-1. FtpView application flow
When the user starts the application, the only available option is to begin an FTP session. Once the session has begun, the user can list the server directory contents or log out. The user can list the server directory as often as they like during the session, but when the user logs out from the FTP server, the session is ended and she is back where she started. The user must begin a new session by logging in to an FTP server again before she can list the server files or log out again. We will examine in turn each of the following FTP operations: login, list, and logout.
Login
The user starts an FTP 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.