Mounting a proxy server to a /path of a Bottle app

bottle-server.py

import bottle
from hacks import ProxyServer

root = bottle.Bottle()

ps = ProxyServer()

root.mount(ps.wrapped_proxy_app, "/proxyapp")

@root.route('/hello/:name')
def index(name='World'):
    return '<b>Hello %s!</b>' % name

#bottle.debug(True)
bottle.run(app=root, host='localhost', port=8080)

hacks.py

from wsgiproxy.app import WSGIProxyApp

# Remove "hop-by-hop" headers (as defined by RFC2613, Section 13)
# since they are not allowed by the WSGI standard.
FILTER_HEADERS = [
    'Connection',
    'Keep-Alive',
    'Proxy-Authenticate',
    'Proxy-Authorization',
    'TE',
    'Trailers',
    'Transfer-Encoding',
    'Upgrade',
    ]

def wrap_start_response(start_response):
    def wrapped_start_response(status, headers_out):
        # Remove "hop-by-hop" headers
        headers_out = [(k,v) for (k,v) in headers_out
                       if k not in FILTER_HEADERS]
        return start_response(status, headers_out)
    return wrapped_start_response

class ProxyServer(object):
    def __init__(self, url="http://localhost"):
        self.URL = url
        self.proxy_app = WSGIProxyApp(url)

    def wrapped_proxy_app(self, environ, start_response):
        start_response = wrap_start_response(start_response)
        return self.proxy_app(environ, start_response)