要创建ProxyFactory可以修改服务器响应头的内容，您可以覆盖ProxyClient.handle*()方法：
from twisted.python import log
from twisted.web import http, proxy
class ProxyClient(proxy.ProxyClient):
"""Mangle returned header, content here.
Use `self.father` methods to modify request directly.
"""
def handleHeader(self, key, value):
# change response header here
log.msg("Header: %s: %s" % (key, value))
proxy.ProxyClient.handleHeader(self, key, value)
def handleResponsePart(self, buffer):
# change response part here
log.msg("Content: %s" % (buffer[:50],))
# make all content upper case
proxy.ProxyClient.handleResponsePart(self, buffer.upper())
class ProxyClientFactory(proxy.ProxyClientFactory):
protocol = ProxyClient
class ProxyRequest(proxy.ProxyRequest):
protocols = dict(http=ProxyClientFactory)
class Proxy(proxy.Proxy):
requestFactory = ProxyRequest
class ProxyFactory(http.HTTPFactory):
protocol = Proxy
通过查看的来源，可以得到此解决方案twisted.web.proxy。我不知道这是多么习惯。
要将其作为脚本或通过运行twistd，请在末尾添加：
portstr = "tcp:8080:interface=localhost" # serve on localhost:8080
if __name__ == '__main__': # $ python proxy_modify_request.py
import sys
from twisted.internet import endpoints, reactor
def shutdown(reason, reactor, stopping=[]):
"""Stop the reactor."""
if stopping: return
stopping.append(True)
if reason:
log.msg(reason.value)
reactor.callWhenRunning(reactor.stop)
log.startLogging(sys.stdout)
endpoint = endpoints.serverFromString(reactor, portstr)
d = endpoint.listen(ProxyFactory())
d.addErrback(shutdown, reactor)
reactor.run()
else: # $ twistd -ny proxy_modify_request.py
from twisted.application import service, strports
application = service.Application("proxy_modify_request")
strports.service(portstr, ProxyFactory()).setServiceParent(application)
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