Examples of org.zkoss.web.util.resource.ClassWebResource

org.zkoss.web.util.resource.ClassWebResource
Used to access resouces located in class path and under /web. It doesn't work alone. Rather, it is a helper for servlet, such as ZK's update servlet or {@link ClassWebServlet}.
Typical use:
1. Declares a member in the servlet to serve the request for the resource located in class path.
2. Invoke {@link #getInstance} to init the member whenServlet.init() is called.
3. Calling {@link #service} when a request is receive.
Note: it assumes the file being loaded and the output stream is encoded in UTF-8 unless the extendlet handles it differently. @author tomyeh

   * @since 5.0.3
   */
  public static void updateDebugJS(WebApp wapp, boolean debug) {
    final WebManager wm = WebManager.getWebManagerIfAny(wapp);
    if (wm != null) {
      final ClassWebResource cwr = wm.getClassWebResource();
      cwr.setDebugJS(debug);
      final Extendlet ext = cwr.getExtendlet("wpd");
      if (ext instanceof WpdExtendlet)
        ((WpdExtendlet)ext).setDebugJS(debug);
    }
  }

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    //Bug 1801028: We cannot invoke ZumlExtendlet directly
    //The real reason is unknown yet -- it could be due to
    //the re-creation of ExecutionImpl
    //However, the performance is not a major issue, so just skip
    final ClassWebResource cwr =
      WebManager.getWebManager(_ctx).getClassWebResource();
    final String attrnm = include ?
      "org.zkoss.web.servlet.include": "org.zkoss.web.servlet.forward";
    if (isDirectInclude(cwr, page)) {
      Object old = null;
      if (mode == PASS_THRU_ATTR) {
        old = _request.getAttribute(Attributes.ARG);
        if (params != null)
          _request.setAttribute(Attributes.ARG, params);
          //If params=null, use the 'inherited' one (same as Servlets.include)
      }


      _request.setAttribute(attrnm, Boolean.TRUE);
        //so Servlets.isIncluded returns correctly
      try {
        cwr.service(_request,
          HttpBufferedResponse.getInstance(_response, out),
          page.substring(2));
      } finally {
        _request.removeAttribute(attrnm);
        if (mode == PASS_THRU_ATTR)

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    final boolean withpi = pi != null && pi.length() != 0;
    if (withpi && pi.startsWith(ClassWebResource.PATH_PREFIX)) {
      //use HttpSession to avoid loading SerializableSession in GAE
      //and don't retrieve session if possible
      final ClassWebResource cwr = getClassWebResource();
      final HttpSession hsess =
        shallSession(cwr, pi) ? request.getSession(false): null;
      Object oldsess = null;
      if (hsess == null) {
        oldsess = SessionsCtrl.getRawCurrent();
        SessionsCtrl.setCurrent(new SessionResolverImpl(_ctx, request));
        //it might be created later
      }


      WebApp wapp;
      Session sess;
      final Object old = hsess != null?
        (wapp = WebManager.getWebAppIfAny(_ctx)) != null &&
        (sess = SessionsCtrl.getSession(wapp, hsess)) != null ?
          I18Ns.setup(sess, request, response, "UTF-8"):
          I18Ns.setup(hsess, request, response, "UTF-8"):
        Charsets.setup(null, request, response, "UTF-8");
      try {
        cwr.service(request, response,
            pi.substring(ClassWebResource.PATH_PREFIX.length()));
      } finally {
        if (hsess != null) I18Ns.cleanup(request, old);
        else {
          Charsets.cleanup(request, old);

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