import contextlib import math import socket import sys import time import urllib2 HASHES_URL = 'https://pdfium-gold.skia.org/_/hashes' RETRIES = 5 TIMEOUT = 60 WAIT_BASE = 15 socket.setdefaulttimeout(TIMEOUT) for retry in range(RETRIES): try: with contextlib.closing( urllib2.urlopen(HASHES_URL, timeout=TIMEOUT)) as w: hashes = w.read() with open(sys.argv[1], 'w') as f: f.write(hashes) break except Exception as e: print 'Failed to get uninteresting hashes from %s:' % HASHES_URL print e if retry == RETRIES: raise waittime = WAIT_BASE * math.pow(2, retry) print 'Retry in %d seconds.' % waittime time.sleep(waittime)