:meth:`.WNetworkClientProto.upload_file` method implementation

def upload_file(self, file_name, file_obj, *args, **kwargs):
		""" :meth:`.WNetworkClientProto.upload_file` method implementation
		"""
		previous_path = self.session_path()
		try:
			self.session_path(file_name)
			with open(self.full_path(), mode='wb') as f:
				chunk = file_obj.read(io.DEFAULT_BUFFER_SIZE)
				while len(chunk) > 0:
					f.write(chunk)
					chunk = file_obj.read(io.DEFAULT_BUFFER_SIZE)
		finally:
			self.session_path(previous_path)