Use Matlab to Login to Webpage and Download File

Using Matlab, I'm trying to download a file from a website that requires you to login first. The file I'm trying to download i开发者_JAVA技巧s here (http://www.standardandpoors.com/prot/spf/docs/indices/SPUSA-500-USDUF--P-US-L--Constituents.xls)

I'm guessing this involves cookies and hacking into the java code in the urlwrite function. Has anybody done this or does anybody have ideas on how I get started? Is there some standard way to login and get a cookie, and then pass the cookie back with future requests?

I would think system, rather than tool. I agree with Alex - Perl to download, maybe Pentaho/Kettle to parse/process. Especially if you're going to do more of this.