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annotate roundup/anypy/random_.py @ 7596:e5fa31aad344

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fix: replace bad reverted code change; allow js rate headers Last commit included an incorrect undo. I was going to move the Allow header/output format parsing earlier in the dispatch method. But I reverted it incorrectly and removed it instead. It has been added back in the former location. Header that allows javascript access to the rest rate limit header has been moved. The rate limit headers can be accessed by client side javascript regardless of the rate limit being exceeded.
author John Rouillard <rouilj@ieee.org>
date Thu, 03 Aug 2023 18:28:19 -0400
parents 07ce4e4110f5
children f002747b6773
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1 try:
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2 from secrets import choice, randbelow, token_bytes
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3
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4 def seed(v=None):
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5 pass
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6
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7 is_weak = False
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8 except ImportError:
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9 import os as _os
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10 import random as _random
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11
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12 # prefer to use SystemRandom if it is available
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13 if hasattr(_random, 'SystemRandom'):
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14 def seed(v=None):
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15 pass
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17 _r = _random.SystemRandom()
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18 is_weak = False
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19 else:
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20 # don't completely throw away the existing state, but add some
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21 # more random state to the existing state
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22 def seed(v=None):
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23 import os
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24 import time
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25 _r.seed((_r.getstate(),
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26 v,
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27 hasattr(os, 'getpid') and os.getpid(),
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28 time.time()))
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29
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30 # create our own instance so we don't mess with the global
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31 # random number generator
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32 _r = _random.Random()
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33 seed()
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34 is_weak = True
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35
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36 choice = _r.choice
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37
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38 def randbelow(i):
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39 return _r.randint(0, i - 1)
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40
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41 if hasattr(_os, 'urandom'):
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42 def token_bytes(l):
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43 return _os.urandom(l)
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44 else:
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45 def token_bytes(l):
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46 _bchr = chr if str == bytes else lambda x: bytes((x,))
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47 return b''.join([_bchr(_r.getrandbits(8)) for i in range(l)])
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