Gotchas

Content-Type header is always text/html

This might happen when Struts 1.x is your front controller. Struts has a RequestProcessor that handles an incoming request and applies rules as specified in the struts-config. Being a web application filter, the ResponseHeaderFilter comes in much before struts and applies all the response headers as specified by you in the config. Struts would always override the content-type header for an incoming request. This issue was earlier discussed on the Struts' user mailing list here.

The easiest workaround is to create your own controller class which is a subclass of the struts' RequestProccessor class and override the processContent method as follows: ``` import org.apache.struts.action.RequestProcessor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;

public class MyRequestProcessor extends RequestProcessor { /** * Overriding the default behaviour of always setting the content-type header. * The super's processContent method is only invoked when the content-type header is * not already set. * * @param request (current request) * @param response (response to be processed) / protected void processContent(HttpServletRequest request, HttpServletResponse response) { if(response.getContentType() != null){ super.processContent(request, response); }
} } and then add the above class to your struts-config.xml to tell struts that you have a custom controller: ```` **Note: Add this only after all the ` in your struts-config.xml*