Captures HTTP headers and saves them in a JSON file

header.py

"""
Captures all headers in a JSON file.
"""

import json
import tornado.ioloop
import tornado.web
import pprint

class Header(tornado.web.RequestHandler):
    def get(self, path='', *args):
        headers = self.request.headers
        self.write('<pre>' + pprint.pformat(headers, indent=2) + '</pre>')
        open('headers.json', 'a').write(json.dumps(headers))

application = tornado.web.Application([
    (r'/.*', Header),
])

if __name__ == "__main__":
    application.listen(9002)
    tornado.ioloop.IOLoop.instance().start()