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#!/usr/bin/env python
'''
WebSocket server-side load test program. Sends and receives traffic
that has a random payload (length and content) that is checksummed and
given a sequence number. Any errors are reported and counted.
'''
import sys, os, select, random, time, optparse
sys.path.insert(0,os.path.dirname(__file__) + "/../")
from websocket import WebSocketServer
class WebSocketLoad(WebSocketServer):
buffer_size = 65536
max_packet_size = 10000
recv_cnt = 0
send_cnt = 0
def __init__(self, *args, **kwargs):
self.errors = 0
self.delay = kwargs.pop('delay')
print "Prepopulating random array"
self.rand_array = []
for i in range(0, self.max_packet_size):
self.rand_array.append(random.randint(0, 9))
WebSocketServer.__init__(self, *args, **kwargs)
def new_client(self):
self.send_cnt = 0
self.recv_cnt = 0
try:
self.responder(self.client)
except:
print "accumulated errors:", self.errors
self.errors = 0
raise
def responder(self, client):
c_pend = 0
cqueue = []
cpartial = ""
socks = [client]
last_send = time.time() * 1000
while True:
ins, outs, excepts = select.select(socks, socks, socks, 1)
if excepts: raise Exception("Socket exception")
if client in ins:
frames, closed = self.recv_frames()
err = self.check(frames)
if err:
self.errors = self.errors + 1
print err
if closed:
self.send_close()
raise self.EClose(closed)
now = time.time() * 1000
if client in outs:
if c_pend:
last_send = now
c_pend = self.send_frames()
elif now > (last_send + self.delay):
last_send = now
c_pend = self.send_frames([self.generate()])
def generate(self):
length = random.randint(10, self.max_packet_size)
numlist = self.rand_array[self.max_packet_size-length:]
# Error in length
#numlist.append(5)
chksum = sum(numlist)
# Error in checksum
#numlist[0] = 5
nums = "".join( [str(n) for n in numlist] )
data = "^%d:%d:%d:%s$" % (self.send_cnt, length, chksum, nums)
self.send_cnt += 1
return data
def check(self, frames):
err = ""
for data in frames:
if data.count('$') > 1:
raise Exception("Multiple parts within single packet")
if len(data) == 0:
self.traffic("_")
continue
if data[0] != "^":
err += "buf did not start with '^'\n"
continue
try:
cnt, length, chksum, nums = data[1:-1].split(':')
cnt = int(cnt)
length = int(length)
chksum = int(chksum)
except:
print "\n<BOF>" + repr(data) + "<EOF>"
err += "Invalid data format\n"
continue
if self.recv_cnt != cnt:
err += "Expected count %d but got %d\n" % (self.recv_cnt, cnt)
self.recv_cnt = cnt + 1
continue
self.recv_cnt += 1
if len(nums) != length:
err += "Expected length %d but got %d\n" % (length, len(nums))
continue
inv = nums.translate(None, "0123456789")
if inv:
err += "Invalid characters found: %s\n" % inv
continue
real_chksum = 0
for num in nums:
real_chksum += int(num)
if real_chksum != chksum:
err += "Expected checksum %d but real chksum is %d\n" % (chksum, real_chksum)
return err
if __name__ == '__main__':
parser = optparse.OptionParser(usage="%prog [options] listen_port")
parser.add_option("--verbose", "-v", action="store_true",
help="verbose messages and per frame traffic")
parser.add_option("--cert", default="self.pem",
help="SSL certificate file")
parser.add_option("--key", default=None,
help="SSL key file (if separate from cert)")
parser.add_option("--ssl-only", action="store_true",
help="disallow non-encrypted connections")
(opts, args) = parser.parse_args()
try:
if len(args) != 1: raise
opts.listen_port = int(args[0])
if len(args) not in [1,2]: raise
opts.listen_port = int(args[0])
if len(args) == 2:
opts.delay = int(args[1])
else:
opts.delay = 10
except:
parser.error("Invalid arguments")
opts.web = "."
server = WebSocketLoad(**opts.__dict__)
server.start_server()
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