Struts 2 Gzip HTML Output

I want to send back gzip file of an html file.


struts.xml:

<action name="ReportView" class="ReportViewAction" method="execute">
    <result name="success" type="stream">
        <param name="contentType">text/html</param>

        <param name="inputName">fileStream</param>

        <param name="bufferSize">1024</param>

    </result>

</action>


Note:  you can set/override this static params in your action by providing getters.  For example, to return a dynamic value for the contentType


public String getContentType() {
   // contentType is set to whatever you want
   // depending on your content.
   // be it text/html, application/vnd.ms-excel, application/pdf
   return contentType;  
}


Action:

public class ReportViewAction extends ActionSupport implements ServletResponseAware {

    private String id;

    private InputStream fileStream;

    

    @Override

     public String execute() throws Exception {

         Session session = HibernateUtil.currentSession(false);

         Report report = (Report)session.load(Report.class, id);
         // content is a Blob

         fileStream = report.getContent().getBinaryStream();

         return super.execute();

    }

     

     public String getId() {

         return id;

     }

     public void setId(String id) {

         this.id = id;

     }

     // this matches the inputName specified struts.xml

     public InputStream getFileStream() {

         return fileStream;

     }

     public void setFileStream(InputStream fileStream) {

         this.fileStream = fileStream;

     }

     @Override

     public void setServletResponse(HttpServletResponse response) {

         response.setHeader("Content-Encoding", "gzip");

     }

}