def query_exception_handler(request):
if EXCEPTION_HANDLERS is None:
_setup_handlers()
try:
decoder = get_decoder(request)
handlers = sorted([
handler() for handler in EXCEPTION_HANDLERS
if handler_supports_service(handler, decoder.service)
],
key=lambda h: max(h.versions),
reverse=True)
# try to get the correctly versioned exception handler
if decoder.version:
for handler in handlers:
if decoder.version in handler.versions:
return handler
else:
# return the exception handler with the highest version,
# if one is available
return handlers[0]
except:
# swallow any exception here, because we *really* need a handler
# to correctly show the exception.
pass
# last resort fallback is a plain OWS exception handler
return OWS20ExceptionHandler()
def query_exception_handler(self, request):
try:
decoder = get_decoder(request)
handlers = self.exception_handlers
handlers = sorted(
filter(
partial(handler_supports_service, service=decoder.service),
self.exception_handlers
),
key=lambda h: max(h.versions), reverse=True
)
# try to get the correctly versioned exception handler
if decoder.version:
for handler in handlers:
if decoder.version in handler.versions:
return handler
else:
# return the exception handler with the highest version,
# if one is available
return handlers[0]
except:
# swallow any exception here, because we *really* need a handler
# to correctly show the exception.
pass
# last resort fallback is a plain OWS exception handler
return OWS20ExceptionHandler()
def query_service_handler(self, request):
""" Tries to find the correct service handler
"""
decoder = get_decoder(request)
if request.method == "GET":
handlers = self.get_service_handlers
elif request.method == "POST":
handlers = self.post_service_handlers
else:
handlers = self.service_handlers
version = decoder.version
if version is None:
accepted_versions = decoder.acceptversions
handlers = filter_handlers(
handlers, decoder.service, accepted_versions, decoder.request
)
return self.version_negotiation(handlers, accepted_versions)
# check that the service is supported
handlers = filter(
partial(handler_supports_service, service=decoder.service), handlers
)
if not handlers:
raise ServiceNotSupportedException(decoder.service)
# check that the required version is enabled
handlers_ = filter(
lambda h: decoder.version in h.versions, handlers
)
if not handlers_:
# old style version negotiation shall always return capabilities
if decoder.request == "GETCAPABILITIES":
handlers = [sorted(
filter(
lambda h: decoder.request == h.request.upper(), handlers
), key=lambda h: max(h.versions), reverse=True
)[0]]
else:
raise VersionNotSupportedException(decoder.service, decoder.version)
else:
handlers = handlers_
# check that the required operation is supported and sort by the highest
# version supported in descending manner
handlers = sorted(
filter(
lambda h: decoder.request == h.request.upper(), handlers
), key=lambda h: max(h.versions), reverse=True
)
if not handlers:
operation = decoder.request
raise OperationNotSupportedException(
"Operation '%s' is not supported." % operation, operation
)
# return the handler with the highest version
return handlers[0]
def query_exception_handler(self, request):
try:
decoder = get_decoder(request)
handlers = self.exception_handlers
handlers = sorted(filter(
partial(handler_supports_service, service=decoder.service),
self.exception_handlers),
key=lambda h: max(h.versions),
reverse=True)
# try to get the correctly versioned exception handler
if decoder.version:
for handler in handlers:
if decoder.version in handler.versions:
return handler
else:
# return the exception handler with the highest version,
# if one is available
return handlers[0]
except:
# swallow any exception here, because we *really* need a handler
# to correctly show the exception.
pass
# last resort fallback is a plain OWS exception handler
return OWS20ExceptionHandler()
def _decide(self, request):
decoder = get_decoder(request)
userAttributes = self._getAssertedAttributes(request)
resourceAttributes = self._getResourceAttributes(request)
result = self.client.authorize(userAttributes, resourceAttributes,
decoder.request.lower())
return result
def _decide(self, request):
decoder = get_decoder(request)
userAttributes = self._getAssertedAttributes(request)
resourceAttributes = self._getResourceAttributes(request)
result = self.client.authorize(
userAttributes, resourceAttributes, decoder.request.lower()
)
return result
def _getResourceAttributes(self, request):
httpHeader = request.META
attributes = {}
if self.serviceID == 'default' :
attributes[attrib_resource] = httpHeader['SERVER_NAME']
else :
attributes[attrib_resource] = self.serviceID
decoder = get_decoder(request)
attributes['serviceType'] = decoder.service.lower()
attributes['serverName'] = httpHeader['SERVER_NAME']
return attributes
def _getResourceAttributes(self, request):
httpHeader = request.META
attributes = {}
if self.serviceID == 'default':
attributes[attrib_resource] = httpHeader['SERVER_NAME']
else:
attributes[attrib_resource] = self.serviceID
decoder = get_decoder(request)
attributes['serviceType'] = decoder.service.lower()
attributes['serverName'] = httpHeader['SERVER_NAME']
return attributes
def query_service_handler(self, request):
""" Tries to find the correct service handler for a given request. The
request ``method`` can either be "POST" (in which case the request body
is parsed as XML) or "GET" (in which case the request is parsed
as "KVP").
If necessary a version negotiation is conducted, following OWS
guidelines.
:param request: a :class:`Django HttpRequest <django.http.HttpRequest>`
object
:returns: the request handler component for the given request
:raises ServiceNotSupportedException: if the service is not supported
by any component
:raises VersionNotSupportedException: if the specified version is not
supported
:raises OperationNotSupportedException: if the specified request
operation is not supported
"""
decoder = get_decoder(request)
if request.method == "GET":
handlers = self.get_service_handlers
elif request.method == "POST":
handlers = self.post_service_handlers
elif request.method == "OPTIONS":
return OptionsRequestHandler()
else:
raise HTTPMethodNotAllowedError(
"The %s HTTP method is not allowed!" % request.method,
ALLOWED_HTTP_METHODS
)
#handlers = self.service_handlers
version = decoder.version
if version is None:
accepted_versions = decoder.acceptversions
handlers = filter_handlers(
handlers, decoder.service, accepted_versions, decoder.request
)
return self.version_negotiation(handlers, accepted_versions)
# check that the service is supported
handlers = filter(
partial(handler_supports_service, service=decoder.service), handlers
)
if not handlers:
raise ServiceNotSupportedException(decoder.service)
# check that the required version is enabled
handlers_ = filter(
lambda h: decoder.version in h.versions, handlers
)
if not handlers_:
# old style version negotiation shall always return capabilities
if decoder.request == "GETCAPABILITIES":
handlers = [sorted(
filter(
lambda h: decoder.request == h.request.upper(), handlers
), key=lambda h: max(h.versions), reverse=True
)[0]]
else:
raise VersionNotSupportedException(
decoder.service, decoder.version
)
else:
handlers = handlers_
# check that the required operation is supported and sort by the highest
# version supported in descending manner
handlers = sorted(
filter(
lambda h: decoder.request == h.request.upper(), handlers
), key=lambda h: max(h.versions), reverse=True
)
if not handlers:
operation = decoder.request
raise OperationNotSupportedException(
"Operation '%s' is not supported." % operation, operation
)
# return the handler with the highest version
logger.debug("Handling '%s' request for '%s' service version '%s'." %
(handlers[0].request, handlers[0].service,
handlers[0].versions[0]))
return handlers[0]
def query_service_handler(request):
""" Tries to find the correct service handler for a given request. The
request ``method`` can either be "POST" (in which case the request body
is parsed as XML) or "GET" (in which case the request is parsed
as "KVP").
If necessary a version negotiation is conducted, following OWS
guidelines.
:param request: a :class:`Django HttpRequest <django.http.HttpRequest>`
object
:returns: the request handler component for the given request
:raises ServiceNotSupportedException: if the service is not supported
by any component
:raises VersionNotSupportedException: if the specified version is not
supported
:raises OperationNotSupportedException: if the specified request
operation is not supported
"""
if SERVICE_HANDLERS is None:
_setup_handlers()
decoder = get_decoder(request)
if request.method == "GET":
handlers = GET_SERVICE_HANDLERS
elif request.method == "POST":
handlers = POST_SERVICE_HANDLERS
elif request.method == "OPTIONS":
return OptionsRequestHandler()
else:
raise HTTPMethodNotAllowedError(
"The %s HTTP method is not allowed!" % request.method,
ALLOWED_HTTP_METHODS)
version = decoder.version
if version is None:
accepted_versions = decoder.acceptversions
handlers = filter_handlers(handlers, decoder.service,
accepted_versions, decoder.request)
return version_negotiation(handlers, accepted_versions)()
# check that the service is supported
handlers = [
handler for handler in handlers
if handler_supports_service(handler, decoder.service)
]
if not handlers:
raise ServiceNotSupportedException(decoder.service)
# check that the required version is enabled
handlers_ = [
handler for handler in handlers if decoder.version in handler.versions
]
if not handlers_:
# old style version negotiation shall always return capabilities
if decoder.request == "GETCAPABILITIES":
handlers = [
sorted(filter(lambda h: decoder.request == h.request.upper(),
handlers),
key=lambda h: max(h.versions),
reverse=True)[0]
]
else:
raise VersionNotSupportedException(decoder.service,
decoder.version)
else:
handlers = handlers_
# check that the required operation is supported and sort by the highest
# version supported in descending manner
handlers = sorted(filter(lambda h: decoder.request == h.request.upper(),
handlers),
key=lambda h: max(h.versions),
reverse=True)
if not handlers:
operation = decoder.request
raise OperationNotSupportedException(
"Operation '%s' is not supported." % operation, operation)
# return the handler with the highest version
logger.debug(
"Handling '%s' request for '%s' service version '%s'." %
(handlers[0].request, handlers[0].service, handlers[0].versions[0]))
return handlers[0]()
