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cache.py: add timestamp to each entry

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This commit is contained in:
Igor Chubin 2020-04-30 11:20:32 +02:00
parent 0d5f6c298c
commit 192e633607
1 changed files with 25 additions and 8 deletions
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33
lib/cache.py
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@ -7,6 +7,7 @@ import re
import time
import os
import hashlib
import random
import pytz
import pylru
@ -35,9 +36,8 @@ def get_signature(user_agent, query_string, client_ip_address, lang):
`lang`, and `client_ip_address`
"""
timestamp = int(time.time() / 1000)
signature = "%s:%s:%s:%s:%s" % \
(user_agent, query_string, client_ip_address, lang, timestamp)
signature = "%s:%s:%s:%s" % \
(user_agent, query_string, client_ip_address, lang)
print(signature)
return signature
@ -48,8 +48,13 @@ def get(signature):
the `_update_answer` function.
"""
value = CACHE.get(signature)
if value:
value_record = CACHE.get(signature)
if not value_record:
return None
value = value_record["val"]
expiry = value_record["expiry"]
if value and time.time() < expiry:
if value.startswith("file:") or value.startswith("bfile:"):
value = _read_from_file(signature, sighash=value)
if not value:
@ -57,14 +62,26 @@ def get(signature):
return _update_answer(value)
return None
def _randint(minimum, maximum):
return random.randrange(maximum - minimum)
def store(signature, value):
"""
Store in cache `value` for `signature`
"""
if len(value) < MIN_SIZE_FOR_FILECACHE:
CACHE[signature] = value
if len(value) >= MIN_SIZE_FOR_FILECACHE:
value_to_store = _store_in_file(signature, value)
else:
CACHE[signature] = _store_in_file(signature, value)
value_to_store = value
value_record = {
"val": value_to_store,
"expiry": time.time() + _randint(1000, 2000)*1000,
}
CACHE[signature] = value_record
return _update_answer(value)
def _hash(signature):