Fix for Issue #46. Instead of defaulting content-type to None in _get_encoder_decoder, instead default it to an empty string. If the content-type header is missing, then the error message will be unexpected Content-Type: instead of raising a type error when attempting to concatenate None to a str.
Fix for Issue #46. Instead of defaulting content-type to None in _get_encoder_decoder, instead default it to an empty string. If the content-type header is missing, then the error message will be
unexpected Content-Type:instead of raising a type error when attempting to concatenate None to a str.