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#!/usr/bin/env python
# fmt: off
"""
An example of {ref}`url-patterns`
"""
from datetime import timedelta
from requests_cache import DO_NOT_CACHE, NEVER_EXPIRE, CachedSession
default_expire_after = 60 * 60 # By default, cached responses expire in an hour
urls_expire_after = {
'httpbin.org/image': timedelta(days=7), # Requests for this base URL will expire in a week
'*.fillmurray.com': NEVER_EXPIRE, # Requests matching this pattern will never expire
'*.placeholder.com/*': DO_NOT_CACHE, # Requests matching this pattern will not be cached
}
urls = [
'https://httpbin.org/get', # Will expire in an hour
'https://httpbin.org/image/jpeg', # Will expire in a week
'https://www.fillmurray.com/460/300', # Will never expire
'https://via.placeholder.com/350x150', # Will not be cached
]
def send_requests():
session = CachedSession(
cache_name='example_cache',
expire_after=default_expire_after,
urls_expire_after=urls_expire_after,
)
return [session.get(url) for url in urls]
def _expires_str(response):
if not response.from_cache:
return 'N/A'
elif response.expires is None:
return 'Never'
else:
return response.expires.isoformat()
def main():
send_requests()
cached_responses = send_requests()
for response in cached_responses:
print(
f'{response.url:40} From cache: {response.from_cache:}'
f'\tExpires: {_expires_str(response)}'
)
if __name__ == '__main__':
main()
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