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#!/usr/bin/env python
"""
An example of setting expiration for individual requests
"""
import time
from requests_cache import CachedSession
# Replace this with any other URL you'd like to test
URL = 'https://httpbin.org/get'
def main():
session = CachedSession('example_cache', backend='sqlite')
session.cache.clear()
# By default, cached responses never expire
response = session.get(URL)
assert not response.from_cache
response = session.get(URL)
assert response.from_cache
assert not response.expires
# We can set default expiration for the session using expire_after
session = CachedSession('example_cache', backend='sqlite', expire_after=60)
session.cache.clear()
response = session.get(URL)
response = session.get(URL)
print('Expiration time:', response.expires)
# This can also be overridden for individual requests
session.cache.clear()
response = session.get(URL, expire_after=1)
response = session.get(URL)
assert response.from_cache
print('Expiration time:', response.expires)
# After 1 second, the cached value will expired
time.sleep(1.1)
assert response.is_expired
response = session.get(URL)
# The cached response will either be replaced
# or revalidated (if the site supports conditional requests)
assert response.revalidated or not response.from_cache
if __name__ == '__main__':
t = time.perf_counter()
main()
print('Elapsed: %.3f seconds' % (time.perf_counter() - t))
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