如何在 Tornado ( Python ) 服务器中测试 Max Open Websocket 限制

Question

我正在尝试获取到 websockets 服务器的最大打开连接数。我在 Python 中有简单的代码。这给了我 28K 的开放连接，但我认为服务器或客户端代码可能有问题。

Server.py

#!/usr/bin/env python

import tornado.httpserver
import tornado.websocket
import tornado.ioloop
import tornado.web

class WSHandler(tornado.websocket.WebSocketHandler):
    clients = []

    def open(self):
        self.clients.append(self)
        print 'new connection'
        self.write_message("Hello World")

    def on_message(self, message):
        print 'message received %s' % message

    def on_close(self):
        #self.clients.remove(self)
        pass
        #print 'closed connection'

application = tornado.web.Application([
    (r'/ws', WSHandler),
])


if __name__ == "__main__":
    http_server = tornado.httpserver.HTTPServer(application,no_keep_alive=False)
    http_server.listen(8888)
    tornado.ioloop.IOLoop.instance().start()

客户

#!/usr/bin/env python

"""
Connect websockets in concurrency, 
each connection should be open until last connection made and 
server did not response 
"""

import sys
import gevent
from gevent import monkey
from websocket import create_connection



#------------
# Functions 
#------------
def send_hello(n):
    my_count = 0
    while True:
        ws = create_connection(ws_link)
        ws.send("Hello World")
        recv = ws.recv()
        if recv:
           print "-----------------------"
           print "I'm Connection : %r" % n
           print "Sending 'Hello World'"
           print "Received : %s" % recv
           my_count = my_count + 1 
           #ws.close()  # Do not close the connections,
                     # Let's see how much server can handle.. 
           print "I've sent %r messeges to server" % my_count
           print "-----------------------"


if __name__ == '__main__':
    if len(sys.argv) != 3:
        print "\nUsage:\n\t %r <ws_link> <number_of_connection>\n" % sys.argv[0]
        sys.exit(1) 
    ws_link, number_of_connections = sys.argv[1:]
    # patches stdlib to cooperate with other greenlets
    #monkey.patch_thread()
    try:
       monkey.patch_all()
       jobs = [ gevent.spawn(send_hello,i) for i in range(int(number_of_connections)) ]
       gevent.wait(jobs)
    except Exception as e:
       print "Error : %r" % e
       sys.exit(1)

Answer 1

一个问题是您需要一个全局客户列表。您的服务器代码当前为每个仅包含自身的客户端都有一个客户端列表。

所以：

#!/usr/bin/env python

import tornado.httpserver
import tornado.websocket
import tornado.ioloop
import tornado.web
clients = []

class WSHandler(tornado.websocket.WebSocketHandler):


    def open(self):
        clients.append(self)
        print 'new connection'
        self.write_message("Hello World")

    def on_message(self, message):
        print 'message received %s' % message

    def on_close(self):

        clients.remove(self)
        pass
        #print 'closed connection'

application = tornado.web.Application([
    (r'/ws', WSHandler),
])


if __name__ == "__main__":
    http_server = tornado.httpserver.HTTPServer(application,no_keep_alive=False)
    http_server.listen(8888)
    tornado.ioloop.IOLoop.instance().start()