This open source MITM HTTP proxy security tool is an open source pen testing and security auditing tool
Install dependancies for mitmproxy, in ubuntu/debian
apt-get install libssl-dev libxml2-dev libxslt1-dev python-dev libgd-dev libffi-dev
Create a virtual env and then run
python setup.py develop
cd into root directory of project and run
pserve development.ini