def expiredate(seconds, value):
'''Expire date headers for cache control.
@param seconds Seconds
@param value Value for Cache-Control header
'''
now = time.time()
return {'Cache-Control': value % seconds, 'Date': email.formatdate(now),
'Expires': email.formatdate(now + seconds)}
def expires(seconds):
'''Sets the time a response expires from the cache (HTTP 1.0).'''
headers = {'Expires': email.formatdate(time.time() + seconds)}
def decorator(application):
return CacheHeader(application, headers)
return decorator
def modified(seconds=None):
'''Sets the time a response was modified.'''
headers = {'Modified': email.formatdate(seconds)}
def decorator(application):
return CacheHeader(application, headers)
return decorator
def expire(application, value):
'''Generic setter for 'Cache-Control' headers + expiration info.
@param application WSGI application
@param value 'Cache-Control' value
'''
now = email.formatdate()
headers = {'Cache-Control': value, 'Date': now, 'Expires': now}
return CacheHeader(application, headers)
def nocache(application):
'''Response that a cache can't send without origin server revalidation.'''
now = email.formatdate()
headers = {'Cache-Control': 'no-cache', 'Pragma': 'no-cache', 'Date': now,
'Expires': now}
return CacheHeader(application, headers)
