models.py 文件源码

def _prep_binary_content(self):

        '''     
        Sets delivery method of either payload or header
        Favors Content-Location header if set

        Args:
            None

        Returns:
            None: sets attributes in self.binary and headers
        '''

        # nothing present
        if not self.data and not self.location and 'Content-Location' not in self.resource.headers.keys():
            raise Exception('creating/updating NonRDFSource requires content from self.binary.data, self.binary.location, or the Content-Location header')

        elif 'Content-Location' in self.resource.headers.keys():
            logger.debug('Content-Location header found, using')
            self.delivery = 'header'

        # if Content-Location is not set, look for self.data_location then self.data
        elif 'Content-Location' not in self.resource.headers.keys():

            # data_location set, trumps Content self.data
            if self.location:
                # set appropriate header
                self.resource.headers['Content-Location'] = self.location
                self.delivery = 'header'

            # data attribute is plain text, binary, or file-like object
            elif self.data:

                # if file-like object, set flag for api.http_request
                if isinstance(self.data, io.BufferedIOBase):
                    logger.debug('detected file-like object')
                    self.delivery = 'payload'

                # else, just bytes
                else:
                    logger.debug('detected bytes')
                    self.delivery = 'payload'