Construct progress reporter callback from send_back function.
Parameters: | send_back (fn reference) – Reference to function for sending messages back using AMQP. |
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Returns: | fn reference: Function taking 3 parameters as is required by progress_download(). |
React to given (AMQP) message. message is usually expected to be collections.namedtuple() structure filled with all necessary data.
Parameters: |
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Returns: | response filled with data about conversion and converted file. |
Return type: | ConversionResponse |
Raises: | ValueError – if bad type of message structure is given. |