/** Generates a response for an error message. */
private static void responseError(
HttpServletRequest request, HttpServletResponse response, String errmsg) throws IOException {
// Don't use sendError because Browser cannot handle UTF-8
AuWriter out = AuWriters.newInstance().open(request, response, 0);
out.write(new AuAlert(errmsg));
out.close(request, response);
}
/** @param wapp the Web application (or null if not available yet) */
private void sessionTimeout(
HttpServletRequest request, HttpServletResponse response, WebApp wapp, String dtid)
throws ServletException, IOException {
final String sid = request.getHeader("ZK-SID");
if (sid != null) response.setHeader("ZK-SID", sid);
final AuWriter out = AuWriters.newInstance().open(request, response, 0);
if (!getAuDecoder(wapp).isIgnorable(request, wapp)) {
final String deviceType = getDeviceType(request);
URIInfo ui =
wapp != null ? (URIInfo) wapp.getConfiguration().getTimeoutURI(deviceType) : null;
String uri = ui != null ? ui.uri : null;
out.write(new AuConfirmClose(null)); // Bug: B50-3147382
final AuResponse resp;
if (uri != null) {
if (uri.length() != 0) uri = Encodes.encodeURL(getServletContext(), request, response, uri);
resp = new AuSendRedirect(uri, null);
} else {
String msg = wapp.getConfiguration().getTimeoutMessage(deviceType);
if (msg != null && msg.startsWith("label:")) {
final String key;
msg = Labels.getLabel(key = msg.substring(6), new Object[] {dtid});
if (msg == null) log.warning("Label not found, " + key);
}
if (msg == null) msg = Messages.get(MZk.UPDATE_OBSOLETE_PAGE, dtid);
resp = new AuObsolete(dtid, msg);
}
out.write(resp);
}
out.close(request, response);
}
public void service(HttpServletRequest request, HttpServletResponse response, String pi)
throws ServletException, IOException {
String redirectUrl = request.getParameter(REDIRECT_URL_PARAMETER);
AuSendRedirect auSendRedirect = new AuSendRedirect(redirectUrl, null);
AuWriter auWriter = AuWriters.newInstance();
auWriter.open(request, response);
auWriter.write(auSendRedirect);
auWriter.close(request, response);
}
/**
* Process asynchronous update requests from the client.
*
* @since 3.0.0
*/
protected void process(Session sess, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final String errClient = request.getHeader("ZK-Error-Report");
if (errClient != null)
if (log.debugable())
log.debug("Error found at client: " + errClient + "\n" + Servlets.getDetail(request));
// parse desktop ID
final WebApp wapp = sess.getWebApp();
final WebAppCtrl wappc = (WebAppCtrl) wapp;
final AuDecoder audec = getAuDecoder(wapp);
final String dtid = audec.getDesktopId(request);
if (dtid == null) {
// Bug 1929139: incomplete request (IE only)
if (log.debugable()) {
final String msg = "Incomplete request\n" + Servlets.getDetail(request);
log.debug(msg);
}
response.sendError(467, "Incomplete request");
return;
}
Desktop desktop = getDesktop(sess, dtid);
if (desktop == null) {
final String cmdId = audec.getFirstCommand(request);
if (!"rmDesktop".equals(cmdId))
desktop = recoverDesktop(sess, request, response, wappc, dtid);
if (desktop == null) {
response.setIntHeader("ZK-Error", response.SC_GONE); // denote timeout
sessionTimeout(request, response, wapp, dtid);
return;
}
}
WebManager.setDesktop(request, desktop);
// reason: a new page might be created (such as include)
final String sid = request.getHeader("ZK-SID");
if (sid != null) // Some client might not have ZK-SID
response.setHeader("ZK-SID", sid);
// parse commands
final Configuration config = wapp.getConfiguration();
final List aureqs;
boolean keepAlive = false;
try {
final boolean timerKeepAlive = config.isTimerKeepAlive();
aureqs = audec.decode(request, desktop);
for (Iterator it = aureqs.iterator(); it.hasNext(); ) {
final String cmdId = ((AuRequest) it.next()).getCommand();
keepAlive = !(!timerKeepAlive && Events.ON_TIMER.equals(cmdId)) && !"dummy".equals(cmdId);
// dummy is used for PollingServerPush for piggyback
if (keepAlive) break; // done
}
} catch (Throwable ex) {
log.warningBriefly(ex);
responseError(request, response, Exceptions.getMessage(ex));
return;
}
if (aureqs.isEmpty()) {
final String errmsg = "Illegal request: cmd required";
log.debug(errmsg);
responseError(request, response, errmsg);
return;
}
((SessionCtrl) sess).notifyClientRequest(keepAlive);
// if (log.debugable()) log.debug("AU request: "+aureqs);
final DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
final Execution exec = new ExecutionImpl(getServletContext(), request, response, desktop, null);
if (sid != null) ((ExecutionCtrl) exec).setRequestId(sid);
final AuWriter out = AuWriters.newInstance();
out.setCompress(_compress);
out.open(
request,
response,
desktop.getDevice().isSupported(Device.RESEND)
? getProcessTimeout(config.getResendDelay())
: 0);
// Note: getResendDelay() might return nonpositive
try {
wappc.getUiEngine().execUpdate(exec, aureqs, out);
} catch (RequestOutOfSequenceException ex) {
log.warning(ex.getMessage());
response.setHeader("ZK-SID", sid);
response.setIntHeader("ZK-Error", AuResponse.SC_OUT_OF_SEQUENCE);
}
out.close(request, response);
}