web page screen shot generator

Closed - This job posting has been filled and work has been completed.

Job Description

Hi, we are making a support chat system.
We have already the basic system. However, on the system, support chat operators want to be able to see which page each visitor is seeing.

So, we need either of them
1. a program if I input some command like
"command URL filename"
I can get the URL's screen shot to this file name
2. if I access http://somedomain.com/someURL,
I can get screen shot's image data

It needs to work on Ubuntu 12.

Next thing I would like to know would be...
1. weather you already know there is a library suitable for this job
2. how many hours would you will take