Validation error response

[david4096]

When receiving a 400 Bad Request it would be helpful if the fields in the request that didn't pass validation were in the message. For example, if a string is sent in place of an integer.

[diekhans]

How the protocol buffers parser behaves will be a factor in what error information can be returned. Work on this issue should be delayed until after the conversion.

David Steinberg notifications@github.com writes:

When receiving a 400 Bad Request it would be helpful if the fields in the request that didn't pass validation were in the message. For example, if a string is sent in place of an integer.

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[jeromekelleher]

Agreed with @diekhans --- we won't know quite how to do this until we've finished the protobuf conversion.