@Override
public boolean handleConnectorRequest(VaadinRequest request, VaadinResponse response, String path)
throws IOException {
Matcher matcher = Pattern.compile("(\\d+)(/.*)?").matcher(path);
if (!matcher.matches()) {
return super.handleConnectorRequest(request, response, path);
}
DownloadStream stream;
VaadinSession session = getSession();
session.lock();
try {
List<URLReference> sources = getState().sources;
int sourceIndex = Integer.parseInt(matcher.group(1));
if (sourceIndex < 0 || sourceIndex >= sources.size()) {
getLogger().log(Level.WARNING, "Requested source index {0} is out of bounds", sourceIndex);
return false;
}
URLReference reference = sources.get(sourceIndex);
ConnectorResource resource = (ConnectorResource) ResourceReference.getResource(reference);
stream = resource.getStream();
} finally {
session.unlock();
}
stream.writeResponse(request, response);
return true;
}
/**
* Find the UI for the atmosphere resource, lock it and invoke the callback.
*
* @param resource the atmosphere resource for the current request
* @param callback the push callback to call when a UI is found and locked
*/
private void callWithUi(final AtmosphereResource resource, final PushEventCallback callback) {
AtmosphereRequest req = resource.getRequest();
VaadinServletRequest vaadinRequest = new VaadinServletRequest(req, service);
VaadinSession session = null;
service.requestStart(vaadinRequest, null);
try {
try {
session = service.findVaadinSession(vaadinRequest);
} catch (ServiceException e) {
getLogger().log(Level.SEVERE, "Could not get session. This should never happen", e);
} catch (SessionExpiredException e) {
SystemMessages msg =
service.getSystemMessages(
ServletPortletHelper.findLocale(null, null, vaadinRequest), vaadinRequest);
try {
resource
.getResponse()
.getWriter()
.write(
VaadinService.createCriticalNotificationJSON(
msg.getSessionExpiredCaption(),
msg.getSessionExpiredMessage(),
null,
msg.getSessionExpiredURL()));
} catch (IOException e1) {
getLogger().log(Level.WARNING, "Failed to notify client about unavailable session", e);
}
return;
}
session.lock();
try {
VaadinSession.setCurrent(session);
// Sets UI.currentInstance
final UI ui = service.findUI(vaadinRequest);
if (ui == null) {
// This a request through an already open push connection to
// a UI which no longer exists.
resource
.getResponse()
.getWriter()
.write(UidlRequestHandler.getUINotFoundErrorJSON(service, vaadinRequest));
// End the connection
resource.resume();
return;
}
callback.run(resource, ui);
} catch (IOException e) {
getLogger().log(Level.INFO, "An error occured while writing a push response", e);
} finally {
session.unlock();
}
} finally {
service.requestEnd(vaadinRequest, null, session);
}
}
@Override
public boolean handleConnectorRequest(VaadinRequest request, VaadinResponse response, String path)
throws IOException {
if (!path.matches("dl(/.*)?")) {
// Ignore if it isn't for us
return false;
}
VaadinSession session = getSession();
session.lock();
AdvancedFileDownloader.this.fireEvent();
DownloadStream stream;
try {
Resource resource = getFileDownloadResource();
if (!(resource instanceof ConnectorResource)) {
return false;
}
stream = ((ConnectorResource) resource).getStream();
if (stream.getParameter("Content-Disposition") == null) {
// Content-Disposition: attachment generally forces download
stream.setParameter(
"Content-Disposition", "attachment; filename=\"" + stream.getFileName() + "\"");
}
// Content-Type to block eager browser plug-ins from hijacking
// the file
if (isOverrideContentType()) {
stream.setContentType("application/octet-stream;charset=UTF-8");
}
} finally {
session.unlock();
}
stream.writeResponse(request, response);
return true;
}