def update_hit_count_ajax(request):
'''
Ajax call that can be used to update a hit count.
Ajax is not the only way to do this, but probably will cut down on
bots and spiders.
See template tags for how to implement.
'''
# make sure this is an ajax request
if not is_cached_hitcount_enabled() or not using_memcache() or not request.is_ajax():
raise Http404()
if request.method == "GET":
return json_error_response("Hits counted via POST only.")
object_pk = request.POST.get('object_pk', None)
ctype_pk = request.POST.get('ctype_pk', None)
status = "no hit recorded"
if object_pk and ctype_pk:
result = _update_hit_count(request, object_pk, ctype_pk)
if result:
status = "success"
result_dict = {'status': status}
if CACHED_HITCOUNT_SERVER_CALLBACKS:
result_dict.update(call_custom_callbacks(request, object_pk=object_pk, ctype_pk =ctype_pk))
return HttpResponse(json.dumps(result_dict),mimetype="application/json")
def persist_hits():
if is_cached_hitcount_enabled() and using_memcache():
backend, location, params = parse_backend_conf(CACHED_HITCOUNT_CACHE)
host, port = location.split(':')
hitcount_cache = get_hitcount_cache()
lock = hitcount_cache.get(CACHED_HITCOUNT_LOCK_KEY)
#print 'persist_hits - check %s lock = %s' % (CACHED_HITCOUNT_LOCK_KEY, lock)
if lock is None or lock != 1:
try:
#acquire a lock so no updates will occur while we are persisting the hits to DB
hitcount_cache.set(CACHED_HITCOUNT_LOCK_KEY, 1,
CACHED_HITCOUNT_CACHE_TIMEOUT)
#print 'acquire %s lock = %s ' % (CACHED_HITCOUNT_LOCK_KEY, hitcount_cache.get(CACHED_HITCOUNT_LOCK_KEY))
mem = MemcachedStats(host, port)
keys = mem.keys()
content_types = {
} #used for keeping track of the content types so DB doesn't have to be queried each time
for cache_key in keys:
if "hitcount__" in cache_key and not CACHED_HITCOUNT_IP_CACHE in cache_key:
cache_key = cache_key.split(
':'
)[-1] #the key is a combination of key_prefix, version and key all separated by : - all we need is the key
count = hitcount_cache.get(cache_key)
if count: #only update the hit count if the is not None
hitcount, ctype_pk, object_pk = cache_key.split(
'__')
if ctype_pk in content_types.keys():
content_type = content_types[ctype_pk]
else:
content_type = ContentType.objects.get(
id=ctype_pk)
content_types[ctype_pk] = content_type
with transaction_atomic():
#save a new hit or increment this hits on an existing hit
hit, created = Hit.objects.select_for_update(
).get_or_create(added=datetime.utcnow().date(),
object_pk=object_pk,
content_type=content_type)
if hit and created:
hit.hits = long(count)
hit.save()
elif hit:
hit.hits = hit.hits + long(count)
hit.save()
#reset the hitcount for this object to 0 - even if it was previously None
hitcount_cache.set(cache_key, 0,
CACHED_HITCOUNT_CACHE_TIMEOUT)
#print 'reset key %s to zero = %s ' % (cache_key, hitcount_cache.get(cache_key))
except Exception, ex:
logger.error('Unable to persist hits')
logger.error(ex)
raise ex
finally:
def persist_hits():
if is_cached_hitcount_enabled() and using_memcache():
backend, location, params = parse_backend_conf(CACHED_HITCOUNT_CACHE)
host, port = location.split(':')
hitcount_cache = get_hitcount_cache()
lock = hitcount_cache.get(CACHED_HITCOUNT_LOCK_KEY)
#print 'persist_hits - check %s lock = %s' % (CACHED_HITCOUNT_LOCK_KEY, lock)
if lock is None or lock != 1:
try:
#acquire a lock so no updates will occur while we are persisting the hits to DB
hitcount_cache.set(CACHED_HITCOUNT_LOCK_KEY, 1, CACHED_HITCOUNT_CACHE_TIMEOUT)
#print 'acquire %s lock = %s ' % (CACHED_HITCOUNT_LOCK_KEY, hitcount_cache.get(CACHED_HITCOUNT_LOCK_KEY))
mem = MemcachedStats(host, port)
keys = mem.keys()
content_types = {}#used for keeping track of the content types so DB doesn't have to be queried each time
for cache_key in keys:
if "hitcount__" in cache_key and not CACHED_HITCOUNT_IP_CACHE in cache_key:
cache_key = cache_key.split(':')[-1]#the key is a combination of key_prefix, version and key all separated by : - all we need is the key
count = hitcount_cache.get(cache_key)
if count:#only update the hit count if the is not None
hitcount, ctype_pk, object_pk = cache_key.split('__')
if ctype_pk in content_types.keys():
content_type = content_types[ctype_pk]
else:
content_type = ContentType.objects.get(id=ctype_pk)
content_types[ctype_pk] = content_type
with transaction_atomic():
#save a new hit or increment this hits on an existing hit
hit, created = Hit.objects.select_for_update().get_or_create(added=datetime.utcnow().date(), object_pk=object_pk, content_type=content_type)
if hit and created:
hit.hits = long(count)
hit.save()
elif hit:
hit.hits = hit.hits + long(count)
hit.save()
#reset the hitcount for this object to 0 - even if it was previously None
hitcount_cache.set(cache_key, 0, CACHED_HITCOUNT_CACHE_TIMEOUT)
#print 'reset key %s to zero = %s ' % (cache_key, hitcount_cache.get(cache_key))
except Exception, ex:
logger.error('Unable to persist hits')
logger.error(ex)
raise ex
finally:
def update_hit_count_ajax(request):
'''
Ajax call that can be used to update a hit count.
Ajax is not the only way to do this, but probably will cut down on
bots and spiders.
See template tags for how to implement.
'''
# make sure this is an ajax request
if not is_cached_hitcount_enabled() or not using_memcache(
) or not request.is_ajax():
raise Http404()
if request.method == "GET":
return json_error_response("Hits counted via POST only.")
object_pk = request.POST.get('object_pk', None)
ctype_pk = request.POST.get('ctype_pk', None)
status = "no hit recorded"
if object_pk and ctype_pk:
result = _update_hit_count(request, object_pk, ctype_pk)
if result:
status = "success"
result_dict = {'status': status}
if CACHED_HITCOUNT_SERVER_CALLBACKS:
result_dict.update(
call_custom_callbacks(request,
object_pk=object_pk,
ctype_pk=ctype_pk))
return HttpResponse(json.dumps(result_dict),
content_type="application/json")
def test_memcache_in_use(self):
self.assertTrue(
using_memcache(),
msg="Memcache is not is use so Django Cached Hitcount will not work"
)
def wrapper(request, *args, **kwargs):
if using_memcache():
return method(request, *args, **kwargs)
else:
return True
def test_memcache_in_use(self):
self.assertTrue(using_memcache(), msg="Memcache is not is use so Django Cached Hitcount will not work")
def wrapper(request, *args, **kwargs):
if using_memcache():
return method(request, *args, **kwargs)
else:
return True
