// request

If the specified content-type header is listed/ matched under BinaryMediaTypes, the payload is accepted and transformed based on the ContentHandling. Otherwise, a 415 unsupported media type is returned.

// response

If the specified Accept header is listed/ matched under BinaryMediaTypes, the binary data will be returned after the ContentHandling transformation.

// base64

Note that base64 encoded data is larger than binary data.

// content encodeing

You can specify the Content-Encoding Request header and the APIGW knows how the payload should be decompressed.

Compressed payload –> decompression –> mapping template –> endpoint

Set MinimumCopressionSize to 0 so it always compresses.