def create_block_2_response(data, request):
"""Generate a block 2 response for a specific request.
Args:
request (piccata.message.Message): A request received.
Returns:
piccata.message.Message: A response generated.
"""
data_block, more = extract_block(data, request.opt.block2.num,
request.opt.block2.szx)
if data_block == None:
raise ValueError("Block 2 request number out of bound.")
if request.mtype == CON:
response = Message.AckMessage(request,
code=CONTENT,
payload=data_block)
else:
response = Message(mtype=NON,
code=CONTENT,
payload=data_block,
token=request.token)
response.opt.block2 = (request.opt.block2.num, more,
request.opt.block2.szx)
return response
def _handle_trigger_request(self, request):
response = None
if request.mtype == piccata.constants.CON:
response = Message.AckMessage(
request, constants.CONTENT,
_make_trigger(self.init_resource.data,
self.image_resource.data, False,
self.opts.reset_suppress))
else:
if self.opts.mcast_dfu:
address = self.REALM_LOCAL_ADDR
else:
address = request.remote.addr
self.trigger(address, 3)
return response
def receive_request(self, request):
'''Request callback called by the CoAP toolkit. Note that the function
signature (name, args) is expected by the CoAP toolkit.'''
# TODO: remove hardcoded URIs
handlers = {
'image':
self._handle_image_request,
'init':
self._handle_init_request,
'trig':
lambda request: Message.AckMessage(request, constants.CONTENT, self
.trigger_payload)
}
for uri, handler in handlers.items():
if request.opt.uri_path == _uri_string_to_list(self.uri_prefix +
'/' + uri):
response = handler(request)
return response
def _handle_trigger_request(self, request):
response = Message.AckMessage(
request, constants.CONTENT,
_make_trigger(self.init_resource.data, self.image_resource.data,
self.opts.mcast_dfu, self.opts.reset_suppress))
return response