c++ library for simplify repetitive task on internet?

I need some advice, link, source code or tutorials for simplifying repetitive task over the internet. Let's say that I want download some video from vimeo very often, or login in my gmail account, etc... and for 开发者_如何学JAVAthat purpose I want to programmatically from c++ solve that task. So what I mainly need is some free library for working with html, so that I can scan for example gmail and in right place put my account notification and press login button, or scan site like vimeo, and in them find code that refers to download and execute download process,....

Hi i think you can look for libcurl it support many protocols