External diff via 'ccollab' commandline tool?

Hi,



I like to use the commandline interface wherever possible.

One thing I'd like to do is launch an entire (multi-file) diff for a given review from the commandline.



Is this possible?



Note: All I really need to do is download the .collabdiff file, through an URL such as "http://myserver/externaldiff?reviewid=150&changelistid=3898". From there, the external diff tool can take over and launch my custom diff tools.



The only problem is that if I try to retrieve that .collabdiff file via wget or a similar command-line interface, it does not know that I am logged in, so it is rejected.



So in short: is there any way to any one of:

    (1) launch the external diff via ccollab.exe

    (2) download the .collabdiff file via ccollab.exe

    (3) download the .collabdiff file via my own program (such as wget) - in this case I need some way of passing authentication information



Thanks!