Teory of HTTP:
HTTP specifies four response cache headers that you can set to enable caching:
Cache-ControlExpiresETagLast-Modified
- Expiration Caching - used to cache your entire response for a specific amount of time (e.g. 24 hours), simple, but cache invalidation is more difficult;
- Validation Caching - this is more complex and used to cache your response, but allows you to dynamically invalidate it as soon as your content changes.
Come with a simple class named DictCache. You can named with any name and is a BaseCache class.
The next step I make is to show you how can access it.
One simpe way is to see the page - first session.
The complex come when you need to access for example data and info like:
'adapters', 'auth', 'cert', 'close', 'cookies', 'delete', 'get', 'get_adapter', 'head', 'headers', 'hooks', 'max_redirects', 'merge_environment_settings', 'mount', 'options', 'params', 'patch', 'post', 'prepare_request', 'proxies', 'put', 'rebuild_auth', 'rebuild_method', 'rebuild_proxies', 'redirect_cache', 'request', 'resolve_redirects', 'send', 'stream', 'trust_env', 'verify'
And this is come with teh second session from this source code:
import requests
from cachecontrol import CacheControl
from cachecontrol.cache import BaseCache
class DictCache(BaseCache):
def __init__(self, init_dict=None):
self.data = init_dict or {}
def get(self, key):
return self.data.get(key, None)
def set(self, key, value):
self.data.update({key: value})
def delete(self, key):
self.data.pop(key)
print "first session requests"
sess = requests.session()
cached_sess = CacheControl(sess)
response = cached_sess.get('http://google.com')
print '=================='
print 'see page by add this: print response.text'
print '=================='
print "second session BaseCache"
sess2 = requests.session()
base=DictCache(sess2)
print '=================='
print "dir(base)"
print dir(base)
print '=================='
print"dir(base.data)"
print dir(base.data)
print '=================='
print"base.data.max_redirects"
print base.data.max_redirects
print '=================='
