a
lj @ s d dl Z d dlZd dlmZmZmZ d dlmZmZ dZdddZ dd Z
G d d
d
e Z G d d d e Z
G d
d de ZG dd de ZdS ) N)
formatdate parsedate parsedate_tz)datetime timedeltaz%a, %d %b %Y %H:%M:%S GMTc C s |p
t }|| S N)r Zutcnow)deltadate r
G/usr/lib/python3.9/site-packages/pip/_vendor/cachecontrol/heuristics.py expire_after s r c C s t t| S r )r calendartimegmZ timetuple)Zdtr
r
r datetime_to_header s r c @ s$ e Zd Zdd Zdd Zdd ZdS )
BaseHeuristicc C s dS )a!
Return a valid 1xx warning header value describing the cache
adjustments.
The response is provided too allow warnings like 113
http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need
to explicitly say response is over 24 hours old.
z110 - "Response is Stale"r
selfresponser
r
r warning s zBaseHeuristic.warningc C s i S )zUpdate the response headers with any new headers.
NOTE: This SHOULD always include some Warning header to
signify that the response was cached by the client, not
by way of the provided headers.
r
r r
r
r update_headers! s z BaseHeuristic.update_headersc C s@ | |}|r<|j| | |}|d ur<|jd|i |S )NWarning)r headersupdater )r r Zupdated_headersZwarning_header_valuer
r
r apply* s
zBaseHeuristic.applyN)__name__
__module__ __qualname__r r r r
r
r
r r s r c @ s e Zd ZdZdd ZdS ) OneDayCachezM
Cache the response by providing an expires 1 day in the
future.
c C sR i }d|j vrNt|j d }ttddt|d d d}t||d< d|d< |S ) Nexpiresr )Zdays )r public
cache-control)r r r r r r )r r r r r r
r
r r < s
zOneDayCache.update_headersN)r r r __doc__r r
r
r
r r 6 s r c @ s( e Zd ZdZdd Zdd Zdd ZdS ) ExpiresAfterz;
Cache **all** requests for a defined time period.
c K s t f i || _d S r )r r )r kwr
r
r __init__L s zExpiresAfter.__init__c C s t | j}t|ddS )Nr! )r r" )r r r )r r r r
r
r r O s
zExpiresAfter.update_headersc C s d}|| j S )Nz:110 - Automatically cached for %s. Response might be stale)r )r r Ztmplr
r
r r S s zExpiresAfter.warningN)r r r r# r& r r r
r
r
r r$ G s r$ c @ s( e Zd ZdZh dZdd Zdd ZdS ) LastModifieda
If there is no Expires header already, fall back on Last-Modified
using the heuristic from
http://tools.ietf.org/html/rfc7234#section-4.2.2
to calculate a reasonable value.
Firefox also does something like this per
https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ
http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397
Unlike mozilla we limit this to 24-hr.
> i, i- i i i i i c
C s |j }d|v ri S d|v r*|d dkr*i S |j| jvr:i S d|vsJd|vrNi S tt|d }t|d }|d u s||d u ri S t }td|| }|t| }tdt |d d}||kri S || } dt
t t | iS ) Nr r" r! r z
last-modifiedr
iQ )
r status cacheable_by_default_statusesr
r r r timemaxminstrftimeTIME_FMTgmtime)
r respr r Z
last_modifiedZnowZ current_ager Zfreshness_lifetimer r
r
r r h s* zLastModified.update_headersc C s d S r r
)r r5 r
r
r r s zLastModified.warningN)r r r r# r. r r r
r
r
r r' X s r' )N)r
r/ Z email.utilsr r r r r r3 r r objectr r r$ r' r
r
r
r s
"