How can I set a proxy server for gem?

Question

I am unable to install SASS through command prompt.

I tried below steps

c:\\gem install sass

I am getting below error:

Answer 1

In Addition to @Yifei answer. If you have special character like @, &, $

You have to go with percent-encode | encode the special characters. E.g. instead of this:

http://foo:B@r@http-gateway.domain.org:80

you write this:

http://foo:B%40r@http-gateway.domain.org:80

So @ gets replaced with %40.