class Aws::Plugins::Protocols::RestJson::ContentTypeHandler

def call(context)
  body = context.http_request.body
  # Rest::Handler will set a default JSON body, so size can be checked
  # if this handler is run after serialization.
  if !body.respond_to?(:size) ||
     (body.respond_to?(:size) && body.size > 0)
    context.http_request.headers['Content-Type'] ||=
      'application/json'
  end
  @handler.call(context)
end