blob: 9c4bd460895cbcc937a0bcc28b971b03515a7dca [file] [log] [blame]
#!/usr/bin/env python
# Copyright (c) 2011 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Issue a series of GetHash requests to the SafeBrowsing servers and measure
the response times.
Usage:
$ ./gethash_timer.py --period=600 --samples=20 --output=resp.csv
--period (or -p): The amount of time (in seconds) to wait between GetHash
requests. Using a value of more than 300 (5 minutes) to
include the effect of DNS.
--samples (or -s): The number of requests to issue. If this parameter is not
specified, the test will run indefinitely.
--output (or -o): The path to a file where the output will be written in
CSV format: sample_number,response_code,elapsed_time_ms
"""
import getopt
import httplib
import sys
import time
_GETHASH_HOST = 'safebrowsing.clients.google.com'
_GETHASH_REQUEST = (
'/safebrowsing/gethash?client=googleclient&appver=1.0&pver=2.1')
# Global logging file handle.
g_file_handle = None
def IssueGetHash(prefix):
'''Issue one GetHash request to the safebrowsing servers.
Args:
prefix: A 4 byte value to look up on the server.
Returns:
The HTTP response code for the GetHash request.
'''
body = '4:4\n' + prefix
h = httplib.HTTPConnection(_GETHASH_HOST)
h.putrequest('POST', _GETHASH_REQUEST)
h.putheader('content-length', str(len(body)))
h.endheaders()
h.send(body)
response_code = h.getresponse().status
h.close()
return response_code
def TimedGetHash(prefix):
'''Measure the amount of time it takes to receive a GetHash response.
Args:
prefix: A 4 byte value to look up on the the server.
Returns:
A tuple of HTTP resonse code and the response time (in milliseconds).
'''
start = time.time()
response_code = IssueGetHash(prefix)
return response_code, (time.time() - start) * 1000
def RunTimedGetHash(period, samples=None):
'''Runs an experiment to measure the amount of time it takes to receive
multiple responses from the GetHash servers.
Args:
period: A floating point value that indicates (in seconds) the delay
between requests.
samples: An integer value indicating the number of requests to make.
If 'None', the test continues indefinitely.
Returns:
None.
'''
global g_file_handle
prefix = '\x50\x61\x75\x6c'
sample_count = 1
while True:
response_code, elapsed_time = TimedGetHash(prefix)
LogResponse(sample_count, response_code, elapsed_time)
sample_count += 1
if samples is not None and sample_count == samples:
break
time.sleep(period)
def LogResponse(sample_count, response_code, elapsed_time):
'''Output the response for one GetHash query.
Args:
sample_count: The current sample number.
response_code: The HTTP response code for the GetHash request.
elapsed_time: The round-trip time (in milliseconds) for the
GetHash request.
Returns:
None.
'''
global g_file_handle
output_list = (sample_count, response_code, elapsed_time)
print 'Request: %d, status: %d, elapsed time: %f ms' % output_list
if g_file_handle is not None:
g_file_handle.write(('%d,%d,%f' % output_list) + '\n')
g_file_handle.flush()
def SetupOutputFile(file_name):
'''Open a file for logging results.
Args:
file_name: A path to a file to store the output.
Returns:
None.
'''
global g_file_handle
g_file_handle = open(file_name, 'w')
def main():
period = 10
samples = None
options, args = getopt.getopt(sys.argv[1:],
's:p:o:',
['samples=', 'period=', 'output='])
for option, value in options:
if option == '-s' or option == '--samples':
samples = int(value)
elif option == '-p' or option == '--period':
period = float(value)
elif option == '-o' or option == '--output':
file_name = value
else:
print 'Bad option: %s' % option
return 1
try:
print 'Starting Timed GetHash ----------'
SetupOutputFile(file_name)
RunTimedGetHash(period, samples)
except KeyboardInterrupt:
pass
print 'Timed GetHash complete ----------'
g_file_handle.close()
if __name__ == '__main__':
sys.exit(main())