def run(mc):
print('run')
mc.set('cnt', 0)
mc.incr('cnt', 2)
mc.decr('cnt', 5)
print(mc.get('cnt'))
def run(mc):
print('run')
# write 2kb entry
v = 2046 * 'a'
if not mc.set('test_key', v):
raise RuntimeError("failed to set value")
if v != mc.get('test_key'):
raise RuntimeError("returned value differs")
def run(mc):
print('run')
# write 2kb entry
v = 2046 * 'a'
if not mc.set('test_key', v):
raise RuntimeError("failed to set value")
if v != mc.get('test_key'):
raise RuntimeError("returned value differs")
def display_page_or_304(self, get_page, expiry=PAGE_CACHING_TIME_304, request_path=None):
""" It just uses etag because last-modified is for http 1.0 and nowadays no browser uses it """
import mc
content = None
#- It's possible to customize the request path in case different requeste paths have the same content -#
request_path = request_path or self.request.path
#- Trying to get the etag from cachepy -#
current_etag = cachepy.get(constants.cachepy.ETAG_KEY % request_path)
#- There is no etag stored in cachepy.
if current_etag is None:
#- Trying to get the etag from mc.
current_etag = mc.get(constants.mc.ETAG_KEY % request_path)
if current_etag is None:
#- MC doesn't have the etag either -#
content = get_page() # Getting the page content.
current_etag = self._get_content_etag(content) # Generating etag for the content.
mc.add(constants.mc.ETAG_KEY % request_path, current_etag, expiry)
cachepy_expiry = expiry if expiry != 0 else None
cachepy.set(constants.cachepy.ETAG_KEY % request_path, current_etag, cachepy_expiry)
else:
#- MC has the etag let's cache it on cachepy and go on -#
cachepy.set(constants.cachepy.ETAG_KEY % request_path, current_etag)
browser_etag = self.request.headers['If-None-Match'] if 'If-None-Match' in self.request.headers else None
""" Browser etag might be None but current_etag is always generated or gotten from the caches above """
if browser_etag == current_etag:
""" Ther user has already the content cached on his browser """
self.response.headers['ETag'] = current_etag;
self.error(304)
else:
""" No etag match so the content has to be generated and transferred to the client """
if content is None:
""" The content wasn't generated above so lest do it now """
content = get_page()
""" There is no need to generate the etag again because always is going to be generated above, either taken from cachepy or memcache
or generated again """
self.response.headers['ETag'] = current_etag;
self.response.out.write(content)
def wrapper(*args, **kwargs):
timestamp = int(time.time())
self = args[0]
#- Check if the ip was banned -#
ip_ban_key_name = constants.mc.IP_BAN % self.request.remote_addr
ban = mc.get(ip_ban_key_name)
if ban:
#- Renew the ban if it's going to expire in 1/3 of the banning time -#
ban_pending_time = ban_time - (timestamp - ban)
if ban_pending_time < (ban_time/3):
#- Renewing the ban because the attacker insists -#
mc.set(ip_ban_key_name, time.time(), ban_time)
self.abort(403)
current_minute = timestamp - (timestamp%60)
key_name = constants.mc.REQUEST_HIT_FROM_IP % (current_minute, self.request.path, self.request.remote_addr)
#- Increases hits from an ip to a particular url -#
counter = mc.incr(key_name)
if counter > limit_per_minute:
#- Banning ip -#
mc.set(ip_ban_key_name, time.time(), ban_time)
self.abort(403)
else:
return fn(*args, **kwargs)
def run(mc):
print('run')
mc.set('key', 'abc')
mc.delete('key')
print(mc.get('key'))
def run(mc):
print('run')
mc.set('key', 'abc')
print(mc.get('key'))
print(mc.get_stats())
def run(mc):
print('run')
mc.set('key', 'abc')
print(mc.get('key'))
print(mc.get_stats())
def run(mc):
print('run')
mc.set('key', 'abc')
mc.delete('key')
print(mc.get('key'))