client.print(String("POST ") + url +
     " HTTP/1.1rn" + "Host: " +
      host + "rn" + "User-Agent: Arduino/1.0rn" + "Cache-Control: no-cachern" +
      "Content-Type: application/x-www-form-urlencoded" + "rn" + "Connection: closernrn" +
      "Content-Length: " +  post.length() + "rn" +  post );