Basic interception proxy written in python using the socket module. Capable of intercepting https traffic generating certificates on the fly.

sprox is based on sproxy + with a fancy interface.

• Run sproxy-setup.py. It will create the needed directories and create the self-signed SSL certificate. You may specify the local certificates file path (defaults to /etc/ssl/certs/ca-certificates.crt) and the serial number of the self-signed certificate (defaults to 1). python sproxy-setup.py [localcert] [serial]
• In the newly-created directory sproxy_files you can find the certificate file sproxy.pem. Import it in your browser as a trusted certificate authority.
• Configure your browser to use the proxy and run sproxy.py. You can specify the port in the command-line arguments (defaults to 50007). python sproxy.py [port]

The proxy can be launched with default options from the command line. By default is simply prints the first line of each request and response.

Override the Proxy class' methods to customize behaviour. Example:

from sproxy import Proxy
class MyProxy(Proxy):
  def modify_all(self, request):
    '''Override to apply changes to every request'''
    request.set_header('user-agent', 'sproxy') #modify header on all oncoming requests
    
  def output_flow(self, request, response):
    '''Override to change output'''
    print request.head #print the whole head of request and response
    print response.head
    
  def parse_response(self, response, host):
    '''Override to handle received response - best used with concurrency'''
    new_thread = threading.Thread(target=user_defined_function) #start a new thread with some newly-defined function
    new_thread.start()
    
proxy = MyProxy()
#set some options
proxy.serv_port = 10000
proxy.max_listen = 200
#change timeouts to alter performance
proxy.web_timeout = 1
proxy.browser_timeout = 1
#launch proxy
proxy.start()