title: How to add header for http request
body: <p>I am new to Restlet development, trying to add headers to do a HTTP request. I tried the following code, but got "400 bad request, the header is not valid"</p>
  
  <pre><code>String url = "http://xxxxx";
  Client c = new Client(Protocol.HTTP);
  
  Request request = new Request(Method.GET, url);
  HashMap attributes = new HashMap();
  
  attributes.put = ("DeviceID", "myDeviceID");
  attributes.put = ("Centent-Type", "myCT");
  attributes.put = ("User-Agent", "my user agent");
  attributes.put = ("ClientID", "myCid");
  
  request.setAttributes(attributes);
  Response r =c.handle(request);
  </code></pre>
  
  <p>I am using Restlet 2.0.
  Please help. any sample code would be great help. thanks in advance.
  KC</p>