class AWS::Core::Http::NetHttpHandler

def build_request request
  # Net::HTTP adds a content-type header automatically unless its set
  # and this messes with request signature signing.  Also, it expects
  # all header values to be strings (it call strip on them).
  headers = { 'content-type' => '' }
  request.headers.each_pair do |key,value|
    headers[key] = value.to_s
  end
  req_class = case request.http_method
    when 'GET'    then Net::HTTP::Get
    when 'PUT'    then Net::HTTP::Put
    when 'POST'   then Net::HTTP::Post
    when 'HEAD'   then Net::HTTP::Head
    when 'DELETE' then Net::HTTP::Delete
    else raise "unsupported http method: #{request.http_method}"
  end
  net_http_req = req_class.new(request.uri, headers)
  net_http_req.body = request.body
  net_http_req
end