Working with Headers

Working with Headers

You can access the HTTP header fields of a URL loaded by your application by listening for the contentLoading request.

The oldvalue is a ContentLoader object. If you do a getURLConnection( ) on that object when the HTTP subsystem is active, an ice.net.HttpURLConnection is returned. The connection contains header fields after the contentLoading, begin event has fired.

For example, open the /tutorial/step04/MyBrowser.java file, and look for the propertyChange (PropertyChangeEvent event) method.

You could add the following code at the beginning of the method:
if (propertyName.equals(PropertyConstants.CONTENT_LOADING) &&

    newValue.equals(PropertyConstants.REQUEST)) {
 
    ContentLoader contentLoader = (ContentLoader)event.getOldValue();

    ice.net.HttpURLConnection httpUrlConnection =

        (ice.net.HttpURLConnection)contentLoader.getURLConnection();

    System.out.println(httpUrlConnection);

}


 
For more information, see Working with Property Change Events.

Setting Specific Request Headers

You can specify your own headers in an HTTP request. To do this, use HttpURLConnection.setDefaultRequestProperty(String key, String value).