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Status page without login [message #1752248]

Fri, 20 January 2017 09:51

Andreas Christ

Messages: 32
Registered: April 2016

Member

We'd like to implement a simple page with some status information (e.g. Scout version, JDK version, LIB/JAR versions etc.) which should be accessed without any login/authentication. Is it possible, to display such a page for any anonymous user?

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Re: Status page without login [message #1752251 is a reply to message #1752248]

Fri, 20 January 2017 10:03

Ivan Motsch

Messages: 126
Registered: March 2010

Senior Member

Typically this is done in the web.xml where some or all of the /res/ resources are excluded from access restrictions. The code below is from the scout demo app.

<filter>
    <filter-name>AuthFilter</filter-name>
    <filter-class>org.eclipse.scout.widgets.ui.html.WidgetsUiServletFilter</filter-class>
    <init-param>
      <param-name>filter-exclude</param-name>
      <param-value>
        /res/*
        /path-to-your-status-page
      </param-value>
    </init-param>
  </filter>

This param is interpreted by the WidgetsUiServletFilter that covers the full /* servlet range.

In order to have your status page, simply implement the Bean interface org.eclipse.scout.rt.ui.html.IUiServletRequestHandler.

public class StatusPageUiServletRequestHandler extends AbstractUiServletRequestHandler {

  private final HttpCacheControl m_httpCacheControl = BEANS.get(HttpCacheControl.class);

  @Override
  public boolean handleGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    // serve only /path-to-your-status-page
    String pathInfo = req.getPathInfo();
    if (ObjectUtility.notEquals(pathInfo, "/path-to-your-status-page")) {
      //not handled
      return false;
    }

    // disable caching
    m_httpCacheControl.checkAndSetCacheHeaders(req, resp, null, null);

    // return calculated status page to servlet response...
      
    //handled
    return true;
  }
}

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