def decode()

in azure/functions/blob.py [0:0]

• 43 lines of code
• 10 McCabe index (conditional complexity)

    def decode(cls, data: meta.Datum, *, trigger_metadata) -> Any:
        if data is None or data.type is None:
            return None

        data_type = data.type

        if data_type == 'string':
            data = data.value.encode('utf-8')
        elif data_type == 'bytes':
            data = data.value
        else:
            raise ValueError(
                f'unexpected type of data received for the "blob" binding '
                f': {data_type!r}'
            )

        if not trigger_metadata:
            return InputStream(data=data)
        else:
            properties = cls._decode_trigger_metadata_field(
                trigger_metadata, 'Properties', python_type=dict)
            if properties:
                blob_properties = properties
                length = properties.get('ContentLength') or \
                    properties.get('Length')
                length = int(length) if length else None
            else:
                blob_properties = None
                length = None

            metadata = None
            try:
                metadata = cls._decode_trigger_metadata_field(trigger_metadata,
                                                              'Metadata',
                                                              python_type=dict)
            except (KeyError, ValueError):
                # avoiding any exceptions when fetching Metadata as the
                # metadata type is unclear.
                pass

            return InputStream(
                data=data,
                name=cls._decode_trigger_metadata_field(
                    trigger_metadata, 'BlobTrigger', python_type=str),
                length=length,
                uri=cls._decode_trigger_metadata_field(
                    trigger_metadata, 'Uri', python_type=str),
                blob_properties=blob_properties,
                metadata=metadata
            )