class Graphlient::Adapters::HTTP::HTTPAdapter

def execute(document:, operation_name: nil, variables: {}, context: {})
  request = Net::HTTP::Post.new(url)
  request['Accept'] = 'application/json'
  request['Content-Type'] = 'application/json'
  headers && headers.each { |name, value| request[name] = value }
  body = {}
  body['query'] = document.to_query_string
  body['variables'] = variables if variables.any?
  body['operationName'] = operation_name if operation_name
  request.body = JSON.generate(body)
  response = connection.request(request)
  raise Graphlient::Errors::HttpServerError, response unless response.is_a?(Net::HTTPOK)
  JSON.parse(response.body)
end