Appsync HTTP resolver supported content types

Question

Hi, I'm trying to write an Appsync http resolver mapping template to do a bulk upload to an Elastic Search index using this api: https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html  
  
This api expects content type "application/x-ndjson". However, appsync is giving me an error "unsupported content type application/x-ndjson". It appears "application/json" and "application/xml" are supported by appsync, but not sure if any others are  
  
Is the list of supported content types for HTTP resolvers published somewhere? Is there any way I can get around this restriction? I just want the body to be passed through as a string. I don't need it to be parsed or serialized... not sure why the http resolver apparently has a whitelist of acceptable content types.  
  
Thanks, cheers  
  
Edited by: Michael J. Fogel on Dec 9, 2019 8:46 AM  
  
Edited by: Michael J. Fogel on Dec 9, 2019 9:22 AM

Answer

The valid subtypes for the application content type are listed here:  
https://docs.aws.amazon.com/appsync/latest/devguide/resolver-mapping-template-reference-http.html#params-field  
  
I made a code change to allow x-ndjson as well and that should be reflected in a couple of weeks as soon as it gets deployed.

Appsync HTTP resolver supported content types

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