The proxy API's POST/PUT methods currently seems to work with text in the request body, but does not seem to work for binary data, such as uploading a zip file.

This may be a limitation of Play framework that may be eased or resolved in version 2.5 or later, where they allow us to stream a request body as bytes.

This task is complete when a user can perform a POST/PUT of binary data (e.g. uploading a zip file) through the Clowder /api/proxy endpoint.