How to Tunnel SSH via HTTP Proxy

I have to access ssh server but there is http proxy when I want to go to internet. How can I tunnel ssh via http proxy? Here are the way to do it:

# Download corkscrew. It is easy tool for tunneling SSH through HTTP proxies

# Extract corkscrew then configure and install it

tar -xzvf corkscrew.tar.gz
cd corkscrew
./configure
make install

# Create ~/.ssh/proxyauth file and set authentication for http proxy server

username:password

# Open ~/.ssh/config file. Add proxy server ip address and its authentication in proxyauth file like this:

Host *
ProxyCommand corkscrew proxy_ip_address proxy_port %h %p ~/.ssh/proxyauth

# Try to access your server via ssh

ssh username@example.com

And it's all done. Enjoy!