def aside_handler(request,
aside_id,
handler_slug,
suffix='',
authenticated=True):
"""The view function for authenticated handler requests."""
if authenticated:
student_id = get_student_id(request)
log.info(u"Start handler %s/%s for student %s", aside_id, handler_slug,
student_id)
else:
student_id = "none"
log.info(u"Start handler %s/%s", aside_id, handler_slug)
runtime = WorkbenchRuntime(student_id)
try:
block = runtime.get_aside(aside_id)
except NoSuchUsage:
raise Http404
request = django_to_webob_request(request)
request.path_info_pop()
request.path_info_pop()
result = block.runtime.handle(block, handler_slug, request, suffix)
log.info(u"End handler %s/%s", aside_id, handler_slug)
return webob_to_django_response(result)
def component_handler(request, usage_id, handler, suffix=""):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to, passed through `quote_slashes`
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
location = unquote_slashes(usage_id)
descriptor = modulestore().get_item(location)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info("XBlock %s attempted to access missing handler %r", descriptor, handler, exc_info=True)
raise Http404
modulestore().save_xmodule(descriptor)
return webob_to_django_response(resp)
def component_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
usage_key = UsageKey.from_string(usage_key_string)
descriptor = get_modulestore(usage_key).get_item(usage_key)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info("XBlock %s attempted to access missing handler %r", descriptor, handler, exc_info=True)
raise Http404
# unintentional update to handle any side effects of handle call; so, request user didn't author
# the change
get_modulestore(usage_key).update_item(descriptor, None)
return webob_to_django_response(resp)
def preview_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
usage_key_string: The usage_key_string-id of the block to dispatch to, passed through `quote_slashes`
handler: The handler to execute
suffix: The remainder of the url to be passed to the handler
"""
usage_key = UsageKey.from_string(usage_key_string)
descriptor = modulestore().get_item(usage_key)
instance = _load_preview_module(request, descriptor)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
except ProcessingError:
log.warning("Module raised an error while processing AJAX request",
exc_info=True)
return HttpResponseBadRequest()
except Exception:
log.exception("error processing ajax call")
raise
return webob_to_django_response(resp)
def component_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
usage_key = UsageKey.from_string(usage_key_string)
descriptor = modulestore().get_item(usage_key)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info("XBlock %s attempted to access missing handler %r",
descriptor,
handler,
exc_info=True)
raise Http404
# unintentional update to handle any side effects of handle call
# could potentially be updating actual course data or simply caching its values
modulestore().update_item(descriptor, request.user.id)
return webob_to_django_response(resp)
def component_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
usage_key = UsageKey.from_string(usage_key_string)
descriptor = modulestore().get_item(usage_key)
descriptor.xmodule_runtime = StudioEditModuleRuntime(request.user)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info("XBlock %s attempted to access missing handler %r", descriptor, handler, exc_info=True)
raise Http404
# unintentional update to handle any side effects of handle call
# could potentially be updating actual course data or simply caching its values
modulestore().update_item(descriptor, request.user.id)
return webob_to_django_response(resp)
def preview_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
usage_key_string: The usage_key_string-id of the block to dispatch to, passed through `quote_slashes`
handler: The handler to execute
suffix: The remainder of the url to be passed to the handler
"""
usage_key = UsageKey.from_string(usage_key_string)
descriptor = modulestore().get_item(usage_key)
instance = _load_preview_module(request, descriptor)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
except ProcessingError:
log.warning("Module raised an error while processing AJAX request",
exc_info=True)
return HttpResponseBadRequest()
except Exception:
log.exception("error processing ajax call")
raise
return webob_to_django_response(resp)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix, user):
"""
Invoke an XBlock handler, either authenticated or not.
"""
location = unquote_slashes(usage_id)
# Check parameters and fail fast if there's a problem
if not Location.is_valid(location):
raise Http404("Invalid location")
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return HttpResponse(json.dumps({"success": error_msg}))
try:
descriptor = modulestore().get_instance(course_id, location)
except ItemNotFoundError:
log.warn(
"Invalid location for course id {course_id}: {location}".format(course_id=course_id, location=location)
)
raise Http404
field_data_cache = FieldDataCache.cache_for_descriptor_descendents(course_id, user, descriptor)
instance = get_module(user, request, location, field_data_cache, course_id, grade_bucket_type="ajax")
if instance is None:
# Either permissions just changed, or someone is trying to be clever
# and load something they shouldn't have access to.
log.debug("No module %s for user %s -- access denied?", location, user)
raise Http404
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call", exc_info=True)
return JsonResponse(object={"success": err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def xblock_handler(request, user_id, secure_token, usage_key_str, handler_name,
suffix):
"""
Run an XBlock's handler and return the result
This endpoint has a unique authentication scheme that involves a temporary
auth token included in the URL (see below). As a result it can be exempt
from CSRF, session auth, and JWT/OAuth.
"""
try:
usage_key = UsageKey.from_string(usage_key_str)
except InvalidKeyError as e:
raise Http404 from e
# To support sandboxed XBlocks, custom frontends, and other use cases, we
# authenticate requests using a secure token in the URL. see
# openedx.core.djangoapps.xblock.utils.get_secure_hash_for_xblock_handler
# for details and rationale.
if not validate_secure_token_for_xblock_handler(user_id, usage_key_str,
secure_token):
raise PermissionDenied("Invalid/expired auth token.")
if request.user.is_authenticated:
# The user authenticated twice, e.g. with session auth and the token.
# This can happen if not running the XBlock in a sandboxed iframe.
# Just make sure the session auth matches the token:
if request.user.id != int(user_id):
raise AuthenticationFailed("Authentication conflict.")
user = request.user
elif user_id.isdigit():
# This is a normal (integer) user ID for a registered user.
# This is the "normal" way this view gets used, with a sandboxed iframe.
user = User.objects.get(pk=int(user_id))
elif user_id.startswith("anon"):
# This is a non-registered (anonymous) user:
assert request.user.is_anonymous
assert not hasattr(request.user, 'xblock_id_for_anonymous_user')
user = request.user # An AnonymousUser
# Since this particular view usually gets called from a sandboxed iframe
# we won't have access to the LMS session data for this user (the iframe
# has a new, empty session). So we need to save the identifier for this
# anonymous user (from the URL) on the user object, so that the runtime
# can get it (instead of generating a new one and saving it into this
# new empty session)
# See djangoapps.xblock.utils.get_xblock_id_for_anonymous_user()
user.xblock_id_for_anonymous_user = user_id
else:
raise AuthenticationFailed("Invalid user ID format.")
request_webob = DjangoWebobRequest(
request
) # Convert from django request to the webob format that XBlocks expect
block = load_block(usage_key, user)
# Run the handler, and save any resulting XBlock field value changes:
response_webob = block.handle(handler_name, request_webob, suffix)
response = webob_to_django_response(response_webob)
return response
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
"""
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return JsonResponse(object={
'success': False,
'msg': error_msg
},
status=413)
instance, tracking_context = _get_module_by_usage_id(
request, course_id, usage_id)
tracking_context_name = 'module_callback_handler'
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name,
tracking_context):
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r",
instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def xblock_handler(request,
course_key_string,
usage_key_string,
handler,
suffix=''):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
Example:
POST ${STUDIO_URL}/sn-api/courses/{course_key}/xblocks/{usage_key}/handler/{handler}/
See https://github.com/edx/edx-platform/blob/open-release/juniper.master/cms/djangoapps/contentstore/views/component.py#L449
"""
usage_key = UsageKey.from_string(usage_key_string)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
if is_xblock_aside(usage_key):
# Get the descriptor for the block being wrapped by the aside (not the aside itself)
descriptor = modulestore().get_item(usage_key.usage_key)
handler_descriptor = get_aside_from_xblock(descriptor,
usage_key.aside_type)
asides = [handler_descriptor]
else:
descriptor = modulestore().get_item(usage_key)
handler_descriptor = descriptor
asides = []
handler_descriptor.xmodule_runtime = StudioEditModuleRuntime(
request.user)
resp = handler_descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info(u"XBlock %s attempted to access missing handler %r",
handler_descriptor,
handler,
exc_info=True)
raise Http404
# unintentional update to handle any side effects of handle call
# could potentially be updating actual course data or simply caching its values
modulestore().update_item(descriptor, request.user.id, asides=asides)
log.info('xblock content is updated (course_id: {}, xblock_id: {})'.format(
course_key_string, usage_key_string))
return webob_to_django_response(resp)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
"""
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return JsonResponse(object={'success': error_msg}, status=413)
instance, tracking_context = get_module_by_usage_id(request, course_id, usage_id)
# Name the transaction so that we can view XBlock handlers separately in
# New Relic. The suffix is necessary for XModule handlers because the
# "handler" in those cases is always just "xmodule_handler".
nr_tx_name = "{}.{}".format(instance.__class__.__name__, handler)
nr_tx_name += "/{}".format(suffix) if suffix else ""
newrelic.agent.set_transaction_name(nr_tx_name, group="Python/XBlock/Handler")
tracking_context_name = 'module_callback_handler'
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name, tracking_context):
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def handler(request, usage_id, handler_slug):
"""Provide a handler for the request."""
student_id = get_student_id(request)
log.info("Start handler %s/%s for student %s", usage_id, handler_slug, student_id)
runtime = WorkbenchRuntime(student_id)
block = runtime.get_block(usage_id)
request = django_to_webob_request(request)
request.path_info_pop()
request.path_info_pop()
result = block.runtime.handle(block, handler_slug, request)
log.info("End handler %s/%s", usage_id, handler_slug)
return webob_to_django_response(result)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
"""
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return JsonResponse(object={'success': error_msg}, status=413)
instance, tracking_context = _get_module_by_usage_id(request, course_id, usage_id)
tracking_context_name = 'module_callback_handler'
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name, tracking_context):
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def handler(request, usage_id, handler_slug, suffix=''):
"""Provide a handler for the request."""
student_id = get_student_id(request)
log.info("Start handler %s/%s for student %s", usage_id, handler_slug, student_id)
runtime = WorkbenchRuntime(student_id)
try:
block = runtime.get_block(usage_id)
except KeyError:
raise Http404
request = django_to_webob_request(request)
request.path_info_pop()
request.path_info_pop()
result = block.runtime.handle(block, handler_slug, request, suffix)
log.info("End handler %s/%s", usage_id, handler_slug)
return webob_to_django_response(result)
def preview_handler(request, usage_key_string, handler, suffix=""):
"""
Dispatch an AJAX action to an xblock
usage_key_string: The usage_key_string-id of the block to dispatch to, passed through `quote_slashes`
handler: The handler to execute
suffix: The remainder of the url to be passed to the handler
"""
usage_key = UsageKey.from_string(usage_key_string)
if isinstance(usage_key, AsideUsageKeyV1):
descriptor = modulestore().get_item(usage_key.usage_key)
for aside in descriptor.runtime.get_asides(descriptor):
if aside.scope_ids.block_type == usage_key.aside_type:
asides = [aside]
instance = aside
break
else:
descriptor = modulestore().get_item(usage_key)
instance = _load_preview_module(request, descriptor)
asides = []
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
except ProcessingError:
log.warning("Module raised an error while processing AJAX request", exc_info=True)
return HttpResponseBadRequest()
except Exception:
log.exception("error processing ajax call")
raise
modulestore().update_item(descriptor, request.user.id, asides=asides)
return webob_to_django_response(resp)
def component_handler(request, usage_key_string, handler, suffix=''):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
usage_key = UsageKey.from_string(usage_key_string)
# Let the module handle the AJAX
req = django_to_webob_request(request)
try:
if is_xblock_aside(usage_key):
# Get the descriptor for the block being wrapped by the aside (not the aside itself)
descriptor = modulestore().get_item(usage_key.usage_key)
handler_descriptor = get_aside_from_xblock(descriptor,
usage_key.aside_type)
asides = [handler_descriptor]
else:
descriptor = modulestore().get_item(usage_key)
handler_descriptor = descriptor
asides = []
handler_descriptor.xmodule_runtime = StudioEditModuleRuntime(
request.user)
resp = handler_descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
log.info(u"XBlock %s attempted to access missing handler %r",
handler_descriptor,
handler,
exc_info=True)
raise Http404
# unintentional update to handle any side effects of handle call
# could potentially be updating actual course data or simply caching its values
modulestore().update_item(descriptor, request.user.id, asides=asides)
return webob_to_django_response(resp)
def post(self, request, usage_key_string):
"""
Dispatch an AJAX action to an xblock
Args:
usage_id: The usage-id of the block to dispatch to
handler (str): The handler to execute
suffix (str): The remainder of the url to be passed to the handler
Returns:
:class:`django.http.HttpResponse`: The response from the handler, converted to a
django response
"""
handler = 'submit_studio_edits'
suffix = ''
usage_key = UsageKey.from_string(usage_key_string)
# Let the module handle the AJAX
req = django_to_webob_request(request)
asides = []
try:
if isinstance(usage_key, (AsideUsageKeyV1, AsideUsageKeyV2)):
descriptor = modulestore().get_item(usage_key.usage_key)
aside_instance = get_xblock_aside_instance(usage_key)
asides = [aside_instance] if aside_instance else []
resp = aside_instance.handle(handler, req, suffix)
else:
descriptor = modulestore().get_item(usage_key)
descriptor.xmodule_runtime = StudioEditModuleRuntime(
request.user)
resp = descriptor.handle(handler, req, suffix)
except NoSuchHandlerError:
raise Http404
# unintentional update to handle any side effects of handle call
# could potentially be updating actual course data or simply caching its values
modulestore().update_item(descriptor, request.user.id, asides=asides)
return webob_to_django_response(resp)
def handler(request, usage_id, handler_slug, suffix='', authenticated=True):
"""The view function for authenticated handler requests."""
if authenticated:
student_id = get_student_id(request)
log.info("Start handler %s/%s for student %s", usage_id, handler_slug, student_id)
else:
student_id = "none"
log.info("Start handler %s/%s", usage_id, handler_slug)
runtime = WorkbenchRuntime(student_id)
try:
block = runtime.get_block(usage_id)
except NoSuchUsage:
raise Http404
request = django_to_webob_request(request)
request.path_info_pop()
request.path_info_pop()
result = block.runtime.handle(block, handler_slug, request, suffix)
log.info("End handler %s/%s", usage_id, handler_slug)
return webob_to_django_response(result)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix, course=None):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
"""
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return JsonResponse({'success': error_msg}, status=413)
# Make a CourseKey from the course_id, raising a 404 upon parse error.
try:
course_key = CourseKey.from_string(course_id)
except InvalidKeyError:
raise Http404
set_custom_metrics_for_course_key(course_key)
with modulestore().bulk_operations(course_key):
instance, tracking_context = get_module_by_usage_id(request, course_id, usage_id, course=course)
# Name the transaction so that we can view XBlock handlers separately in
# New Relic. The suffix is necessary for XModule handlers because the
# "handler" in those cases is always just "xmodule_handler".
nr_tx_name = "{}.{}".format(instance.__class__.__name__, handler)
nr_tx_name += "/{}".format(suffix) if (suffix and handler == "xmodule_handler") else ""
set_monitoring_transaction_name(nr_tx_name, group="Python/XBlock/Handler")
tracking_context_name = 'module_callback_handler'
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name, tracking_context):
resp = instance.handle(handler, req, suffix)
if suffix == 'problem_check' \
and course \
and getattr(course, 'entrance_exam_enabled', False) \
and getattr(instance, 'in_entrance_exam', False):
ee_data = {'entrance_exam_passed': user_has_passed_entrance_exam(request.user, course)}
resp = append_data_to_webob_response(resp, ee_data)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse({'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def handle_xblock_callback(request, course_id, usage_id, handler, suffix=None):
"""
Generic view for extensions. This is where AJAX calls go.
Arguments:
- request -- the django request.
- location -- the module location. Used to look up the XModule instance
- course_id -- defines the course context for this request.
Raises PermissionDenied if the user is not logged in. Raises Http404 if
the location and course_id do not identify a valid module, the module is
not accessible by the user, or the module raises NotFoundError. If the
module raises any other error, it will escape this function.
"""
location = unquote_slashes(usage_id)
# Check parameters and fail fast if there's a problem
if not Location.is_valid(location):
raise Http404("Invalid location")
if not request.user.is_authenticated():
raise PermissionDenied
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return HttpResponse(json.dumps({'success': error_msg}))
try:
descriptor = modulestore().get_instance(course_id, location)
except ItemNotFoundError:
log.warn(
"Invalid location for course id {course_id}: {location}".format(
course_id=course_id,
location=location
)
)
raise Http404
field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
course_id,
request.user,
descriptor
)
instance = get_module(request.user, request, location, field_data_cache, course_id, grade_bucket_type='ajax')
if instance is None:
# Either permissions just changed, or someone is trying to be clever
# and load something they shouldn't have access to.
log.debug("No module %s for user %s -- access denied?", location, request.user)
raise Http404
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix,
user):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
user (User): The currently logged in user
"""
try:
course_id = SlashSeparatedCourseKey.from_deprecated_string(course_id)
usage_key = course_id.make_usage_key_from_deprecated_string(
unquote_slashes(usage_id))
except InvalidKeyError:
raise Http404("Invalid location")
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return HttpResponse(json.dumps({'success': error_msg}))
try:
descriptor = modulestore().get_item(usage_key)
except ItemNotFoundError:
log.warn(
"Invalid location for course id {course_id}: {usage_key}".format(
course_id=usage_key.course_key, usage_key=usage_key))
raise Http404
tracking_context_name = 'module_callback_handler'
tracking_context = {
'module': {
'display_name': descriptor.display_name_with_default,
}
}
field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
course_id, user, descriptor)
instance = get_module(user,
request,
usage_key,
field_data_cache,
grade_bucket_type='ajax')
if instance is None:
# Either permissions just changed, or someone is trying to be clever
# and load something they shouldn't have access to.
log.debug("No module %s for user %s -- access denied?", usage_key,
user)
raise Http404
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name,
tracking_context):
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r",
instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix, user):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
user (User): The currently logged in user
"""
try:
course_id = SlashSeparatedCourseKey.from_deprecated_string(course_id)
usage_key = course_id.make_usage_key_from_deprecated_string(unquote_slashes(usage_id))
except InvalidKeyError:
raise Http404("Invalid location")
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return HttpResponse(json.dumps({'success': error_msg}))
try:
descriptor = modulestore().get_item(usage_key)
except ItemNotFoundError:
log.warn(
"Invalid location for course id {course_id}: {usage_key}".format(
course_id=usage_key.course_key,
usage_key=usage_key
)
)
raise Http404
tracking_context_name = 'module_callback_handler'
tracking_context = {
'module': {
'display_name': descriptor.display_name_with_default,
}
}
field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
course_id,
user,
descriptor
)
instance = get_module(user, request, usage_key, field_data_cache, grade_bucket_type='ajax')
if instance is None:
# Either permissions just changed, or someone is trying to be clever
# and load something they shouldn't have access to.
log.debug("No module %s for user %s -- access denied?", usage_key, user)
raise Http404
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name, tracking_context):
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def _as_django(self, *args, **kwargs):
"""
Return a :class:`django.http.HttpResponse` created from a `webob.Response`
initialized with `*args` and `**kwargs`
"""
return webob_to_django_response(Response(*args, **kwargs))
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix, course=None):
"""
Invoke an XBlock handler, either authenticated or not.
Arguments:
request (HttpRequest): the current request
course_id (str): A string of the form org/course/run
usage_id (str): A string of the form i4x://org/course/category/name@revision
handler (str): The name of the handler to invoke
suffix (str): The suffix to pass to the handler when invoked
"""
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return JsonResponse({'success': error_msg}, status=413)
# Make a CourseKey from the course_id, raising a 404 upon parse error.
try:
course_key = CourseKey.from_string(course_id)
except InvalidKeyError:
raise Http404
# Gather metrics for New Relic so we can slice data in New Relic Insights
newrelic.agent.add_custom_parameter('course_id', unicode(course_key))
newrelic.agent.add_custom_parameter('org', unicode(course_key.org))
with modulestore().bulk_operations(course_key):
instance, tracking_context = get_module_by_usage_id(request, course_id, usage_id, course=course)
# Name the transaction so that we can view XBlock handlers separately in
# New Relic. The suffix is necessary for XModule handlers because the
# "handler" in those cases is always just "xmodule_handler".
nr_tx_name = "{}.{}".format(instance.__class__.__name__, handler)
nr_tx_name += "/{}".format(suffix) if (suffix and handler == "xmodule_handler") else ""
newrelic.agent.set_transaction_name(nr_tx_name, group="Python/XBlock/Handler")
tracking_context_name = 'module_callback_handler'
req = django_to_webob_request(request)
try:
with tracker.get_tracker().context(tracking_context_name, tracking_context):
resp = instance.handle(handler, req, suffix)
if suffix == 'problem_check' \
and course \
and getattr(course, 'entrance_exam_enabled', False) \
and getattr(instance, 'in_entrance_exam', False):
ee_data = {'entrance_exam_passed': user_has_passed_entrance_exam(request, course)}
resp = append_data_to_webob_response(resp, ee_data)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r", instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse({'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
def _invoke_xblock_handler(request, course_id, usage_id, handler, suffix,
user):
"""
Invoke an XBlock handler, either authenticated or not.
"""
location = unquote_slashes(usage_id)
# Check parameters and fail fast if there's a problem
if not Location.is_valid(location):
raise Http404("Invalid location")
# Check submitted files
files = request.FILES or {}
error_msg = _check_files_limits(files)
if error_msg:
return HttpResponse(json.dumps({'success': error_msg}))
try:
descriptor = modulestore().get_instance(course_id, location)
except ItemNotFoundError:
log.warn(
"Invalid location for course id {course_id}: {location}".format(
course_id=course_id, location=location))
raise Http404
field_data_cache = FieldDataCache.cache_for_descriptor_descendents(
course_id, user, descriptor)
instance = get_module(user,
request,
location,
field_data_cache,
course_id,
grade_bucket_type='ajax')
if instance is None:
# Either permissions just changed, or someone is trying to be clever
# and load something they shouldn't have access to.
log.debug("No module %s for user %s -- access denied?", location, user)
raise Http404
req = django_to_webob_request(request)
try:
resp = instance.handle(handler, req, suffix)
except NoSuchHandlerError:
log.exception("XBlock %s attempted to access missing handler %r",
instance, handler)
raise Http404
# If we can't find the module, respond with a 404
except NotFoundError:
log.exception("Module indicating to user that request doesn't exist")
raise Http404
# For XModule-specific errors, we log the error and respond with an error message
except ProcessingError as err:
log.warning("Module encountered an error while processing AJAX call",
exc_info=True)
return JsonResponse(object={'success': err.args[0]}, status=200)
# If any other error occurred, re-raise it to trigger a 500 response
except Exception:
log.exception("error executing xblock handler")
raise
return webob_to_django_response(resp)
