# Usage: mitmdump -s "iframe_injector.py url" # (this script works best with --anticache) from libmproxy.protocol.http import decoded def start(context, argv): if len(argv) != 2: raise ValueError('Usage: -s "iframe_injector.py url"') context.iframe_url = argv[1] def handle_response(context, flow): with decoded(flow.response): # Remove content encoding (gzip, ...) c = flow.response.replace( '', '' % context.iframe_url) if c > 0: context.log("Iframe injected!")