def decorator(f):
@wraps(f)
def wrapper(*args, **kwargs):
# check if the user can access the resource
check_perms(*args, **kwargs)
# for POST requests we can't set cache headers, use the response
# cache nor use conditional requests; this will still use the
# dataframe cache in `superset/viz.py`, though.
if request.method == "POST":
return f(*args, **kwargs)
response = None
if cache:
try:
# build the cache key from the function arguments and any
# other additional GET arguments (like `form_data`, eg).
key_args = list(args)
key_kwargs = kwargs.copy()
key_kwargs.update(request.args)
cache_key = wrapper.make_cache_key(f, *key_args, **key_kwargs)
response = cache.get(cache_key)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logging.exception("Exception possibly due to cache backend.")
# if no response was cached, compute it using the wrapped function
if response is None:
response = f(*args, **kwargs)
# add headers for caching: Last Modified, Expires and ETag
response.cache_control.public = True
response.last_modified = datetime.utcnow()
expiration = max_age if max_age != 0 else FAR_FUTURE
response.expires = response.last_modified + timedelta(
seconds=expiration
)
response.add_etag()
# if we have a cache, store the response from the request
if cache:
try:
cache.set(cache_key, response, timeout=max_age)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logging.exception("Exception possibly due to cache backend.")
return response.make_conditional(request)
if cache:
wrapper.uncached = f
wrapper.cache_timeout = max_age
wrapper.make_cache_key = cache._memoize_make_cache_key( # pylint: disable=protected-access
make_name=None, timeout=max_age
)
return wrapper
def decorator(f):
@wraps(f)
def wrapper(*args, **kwargs):
# check if the user can access the resource
check_perms(*args, **kwargs)
# for POST requests we can't set cache headers, use the response
# cache nor use conditional requests; this will still use the
# dataframe cache in `superset/viz.py`, though.
if request.method == 'POST':
return f(*args, **kwargs)
response = None
if cache:
try:
# build the cache key from the function arguments and any
# other additional GET arguments (like `form_data`, eg).
key_args = list(args)
key_kwargs = kwargs.copy()
key_kwargs.update(request.args)
cache_key = wrapper.make_cache_key(f, *key_args, **key_kwargs)
response = cache.get(cache_key)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logging.exception('Exception possibly due to cache backend.')
# if no response was cached, compute it using the wrapped function
if response is None:
response = f(*args, **kwargs)
# add headers for caching: Last Modified, Expires and ETag
response.cache_control.public = True
response.last_modified = datetime.utcnow()
expiration = max_age if max_age != 0 else FAR_FUTURE
response.expires = \
response.last_modified + timedelta(seconds=expiration)
response.add_etag()
# if we have a cache, store the response from the request
if cache:
try:
cache.set(cache_key, response, timeout=max_age)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logging.exception('Exception possibly due to cache backend.')
return response.make_conditional(request)
if cache:
wrapper.uncached = f
wrapper.cache_timeout = max_age
wrapper.make_cache_key = \
cache._memoize_make_cache_key( # pylint: disable=protected-access
make_name=None, timeout=max_age)
return wrapper
def decorator(f: Callable[..., Any]) -> Callable[..., Any]:
@wraps(f)
def wrapper(*args: Any, **kwargs: Any) -> ETagResponseMixin:
# check if the user can access the resource
check_perms(*args, **kwargs)
# for POST requests we can't set cache headers, use the response
# cache nor use conditional requests; this will still use the
# dataframe cache in `superset/viz.py`, though.
if request.method == "POST" or (skip and skip(*args, **kwargs)):
return f(*args, **kwargs)
response = None
last_modified = get_last_modified and get_last_modified(*args, **kwargs)
if cache:
try:
# build the cache key from the function arguments and any
# other additional GET arguments (like `form_data`, eg).
key_args = list(args)
key_kwargs = kwargs.copy()
key_kwargs.update(request.args)
cache_key = wrapper.make_cache_key( # type: ignore
f, *key_args, **key_kwargs
)
response = cache.get(cache_key)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logger.exception("Exception possibly due to cache backend.")
# if cache is stale?
if (
response
and last_modified
and response.last_modified
and response.last_modified < last_modified
):
response = None
if response is None:
# if no response was cached, compute it using the wrapped function
response = f(*args, **kwargs)
# set expiration headers:
# Last-Modified, Expires, Cache-Control, ETag
response.last_modified = last_modified or datetime.utcnow()
expiration = max_age if max_age != 0 else FAR_FUTURE
response.expires = response.last_modified + timedelta(
seconds=expiration
)
# when needed, instruct the browser to always revalidate cache
if must_revalidate:
# `Cache-Control: no-cache` asks the browser to always store
# the cache, but also must validate it with the server.
response.cache_control.no_cache = True
else:
# `Cache-Control: Public` asks the browser to always store
# the cache.
response.cache_control.public = True
response.add_etag()
# if we have a cache, store the response from the request
if cache:
try:
cache.set(cache_key, response, timeout=max_age)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logger.exception("Exception possibly due to cache backend.")
return response.make_conditional(request)
if cache:
wrapper.uncached = f # type: ignore
wrapper.cache_timeout = max_age # type: ignore
wrapper.make_cache_key = cache._memoize_make_cache_key( # type: ignore # pylint: disable=protected-access
make_name=None, timeout=max_age
)
return wrapper
def decorator(f: Callable[..., Any]) -> Callable[..., Any]:
@wraps(f)
def wrapper(*args: Any, **kwargs: Any) -> ETagResponseMixin:
# check if the user can access the resource
check_perms(*args, **kwargs)
# for POST requests we can't set cache headers, use the response
# cache nor use conditional requests; this will still use the
# dataframe cache in `superset/viz.py`, though.
if request.method == "POST" or (skip and skip(*args, **kwargs)):
return f(*args, **kwargs)
response = None
if cache:
try:
# build the cache key from the function arguments and any
# other additional GET arguments (like `form_data`, eg).
key_args = list(args)
key_kwargs = kwargs.copy()
key_kwargs.update(request.args)
cache_key = wrapper.make_cache_key( # type: ignore
f, *key_args, **key_kwargs
)
response = cache.get(cache_key)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logger.exception("Exception possibly due to cache backend.")
# if cache is stale?
if get_last_modified:
content_changed_time = get_last_modified(*args, **kwargs)
if (
response
and response.last_modified
and response.last_modified.timestamp()
< content_changed_time.timestamp()
):
response = None
else:
# if caller didn't provide content's last_modified time, assume
# its cache won't be stale.
content_changed_time = datetime.utcnow()
# if no response was cached, compute it using the wrapped function
if response is None:
response = f(*args, **kwargs)
# add headers for caching: Last Modified, Expires and ETag
response.cache_control.public = True
response.last_modified = content_changed_time
expiration = max_age if max_age != 0 else FAR_FUTURE
response.expires = response.last_modified + timedelta(
seconds=expiration
)
response.add_etag()
# if we have a cache, store the response from the request
if cache:
try:
cache.set(cache_key, response, timeout=max_age)
except Exception: # pylint: disable=broad-except
if app.debug:
raise
logger.exception("Exception possibly due to cache backend.")
return response.make_conditional(request)
if cache:
wrapper.uncached = f # type: ignore
wrapper.cache_timeout = max_age # type: ignore
wrapper.make_cache_key = cache._memoize_make_cache_key( # type: ignore # pylint: disable=protected-access
make_name=None, timeout=max_age
)
return wrapper
