使用Python的Treq on Twisted来进行HTTP压力测试

 > from treq import get
  
 > def done(response):
 ...   print response.code
 ...   reactor.stop()
  
 > get("http://www.github.com").addCallback(done)
  
 > from twisted.internet import reactor
 200

 #!/usr/bin/env python
 from twisted.internet import epollreactor
 epollreactor.install()
  
 from twisted.internet import reactor, task
 from twisted.web.client import HTTPConnectionPool
 import treq
 import random
 from datetime import datetime
  
 req_generated = 0
 req_made = 0
 req_done = 0
  
 cooperator = task.Cooperator()
  
 pool = HTTPConnectionPool(reactor)
  
 def counter():
   '''This function gets called once a second and prints the progress at one
   second intervals.
   '''
   print("Requests: {} generated; {} made; {} done".format(
       req_generated, req_made, req_done))
   # reset the counters and reschedule ourselves
   req_generated = req_made = req_done = 0
   reactor.callLater(1, counter)
  
 def body_received(body):
   global req_done
   req_done += 1
  
 def request_done(response):
   global req_made
   deferred = treq.json_content(response)
   req_made += 1
   deferred.addCallback(body_received)
   deferred.addErrback(lambda x: None) # ignore errors
   return deferred
  
 def request():
   deferred = treq.post('http://api.host/v2/loadtest/messages',
              auth=('api', 'api-key'),
              data={'from': 'Loadtest <test@example.com>',
                 'to': 'to@example.org',
                'subject': "test"},
             pool=pool)
   deferred.addCallback(request_done)
   return deferred
  
 def requests_generator():
   global req_generated
   while True:
     deferred = request()
     req_generated += 1
     # do not yield deferred here so cooperator won't pause until
     # response is received
     yield None
  
 if __name__ == '__main__':
   # make cooperator work on spawning requests
   cooperator.cooperate(requests_generator())
  
   # run the counter that will be reporting sending speed once a second
   reactor.callLater(1, counter)
  
   # run the reactor
   reactor.run()

 2013-04-25 09:30 Requests: 327 generated; 153 sent; 153 received
 2013-04-25 09:30 Requests: 306 generated; 156 sent; 156 received
 2013-04-25 09:30 Requests: 318 generated; 184 sent; 154 received