def test_init_from_request(
get_url_expiration,
request_expire_after,
url_expire_after,
header_expire_after,
expected_expiration,
):
"""Test precedence with various combinations or per-request, per-session, per-URL, and
Cache-Control expiration
"""
url = 'https://img.site.com/base/img.jpg'
get_url_expiration.return_value = url_expire_after
headers = {
'Cache-Control': f'max-age={header_expire_after}'
} if header_expire_after else {}
actions = CacheActions.from_request(
key='key',
url=URL(url),
request_expire_after=request_expire_after,
session_expire_after=1,
cache_control=True,
headers=headers,
)
assert actions.expire_after == expected_expiration
async def request(
self,
method: str,
url: StrOrURL,
expire_after: ExpirationTime = None,
**kwargs,
) -> Tuple[Optional[CachedResponse], CacheActions]:
"""Fetch a cached response based on request info
Args:
method: HTTP method
url: Request URL
expire_after: Expiration time to set only for this request; overrides
``CachedSession.expire_after``, and accepts all the same values.
kwargs: All other request arguments
"""
key = self.create_key(method, url, **kwargs)
actions = CacheActions.from_request(
key,
url=url,
request_expire_after=expire_after,
session_expire_after=self.expire_after,
urls_expire_after=self.urls_expire_after,
cache_control=self.cache_control,
**kwargs,
)
# Skip reading from the cache, if specified by request headers
response = None if actions.skip_read else await self.get_response(
actions.key)
return response, actions
def test_ignored_headers(directive):
"""Ensure that currently unimplemented Cache-Control headers do not affect behavior"""
url = 'https://img.site.com/base/img.jpg'
headers = {'Cache-Control': directive}
# expiration = get_expiration(response, session_expire_after=1, cache_control=True)
actions = CacheActions.from_request(
key='key',
url=URL(url),
session_expire_after=1,
cache_control=True,
headers=headers,
)
assert actions.expire_after == 1