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Perl CGI Programming
Forms and Form Data
Web Data Passing Paradigms
- Remember from the beginning of the class when we discussed how
data is moved from a web server (server) to a web browser (client) via
a TCP/IP socket.
- What we did not discuss, is how data is returned to the server
from the client browser.
- Obviously, a mechanisim exists, because a web browser requests a
particular page from many pages available on a given server. The
browser must have told the server which one it wants and where to send
it by some mechanisim.
- Therefore, the web browser must be passing some data to the web
server, otherwise the web server would never know what page to
display, or that a page was requested, or even where to send it.
- Therefore, there must be some mechanisim by which we can send
additional data up to a web server, like the contents of text entry
boxes or check boxes that appear on web page forms.
- Actually, there are at least two common ways to accomplish this.
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