Programming :: Attempting To Record The Redirect Url Using Wget And Logging In In Seperate Page?

My friend has a website whereby once you have logged in on one page, you are redirected to another page, with a url similar to:

[URL]

the random string changes each time you log in, however the login page has a static url What i was attempting to do is run a script to get some data from the members page (after uve logged in) - however ive been having some trouble in how to do this, as the variable url with the random string will become invalid after a certain time, and i did not want to consantly change it.

While reading through some documentation i read that wget should be able to login to a form login website however ive had no luck, the command i was attempting to use was:

wget --user USERNAME -password PASSWORD [URL]

similarly i also tried

wget --post-data "username=USERNAME&password=PASSWORD" [URL]

and even both combined. However neither has worked as the html dl'd is simply the login page website. I cannot post a direct link to the website as it is private, however ive looked at the source coding and ive extracted (what i think) is the relevant bit, which is:

Code:

<form action="/cgi-bin/sblogin/login.cgi" method="post" name="login" id="login"><br /><br />
<div class="user_text"><span class="text3">USERNAME:</span></div><div class="user_box"><input type="text" class="text" name="uname"></div>

[code].....