@Override
public boolean handleRequest(
VaadinSession session, VaadinRequest request, VaadinResponse response) throws IOException {
String pathInfo = request.getPathInfo();
if (pathInfo == null) {
return false;
}
Matcher matcher = pattern.matcher(pathInfo);
if (!matcher.matches()) {
return false;
}
String uiid = matcher.group(1);
String type = matcher.group(3);
String key = matcher.group(2);
if (key == null) {
return error(request, response, pathInfo + " is not a valid global resource path");
}
UI ui = session.getUIById(Integer.parseInt(uiid));
if (ui == null) {
return error(request, response, "No UI found for id " + uiid);
}
UI.setCurrent(ui);
ConnectorResource resource;
if (LEGACY_TYPE.equals(type)) {
resource = legacyResources.get(key);
} else {
return error(
request,
response,
"Unknown global resource type " + type + " in requested path " + pathInfo);
}
if (resource == null) {
return error(request, response, "Global resource " + key + " not found");
}
DownloadStream stream = resource.getStream();
if (stream == null) {
return error(request, response, "Resource " + resource + " didn't produce any stream.");
}
stream.writeResponse(request, response);
return true;
}
/**
* Registers a resource to be served with a global URL.
*
* <p>A {@link ConnectorResource} registered for a {@link LegacyComponent} will be set to be
* served with a global URL. Other resource types will be ignored and thus not served by this
* handler.
*
* @param resource the resource to register
* @param ownerConnector the connector to which the resource belongs
*/
public void register(Resource resource, ClientConnector ownerConnector) {
if (resource instanceof ConnectorResource) {
if (!(ownerConnector instanceof LegacyComponent)) {
throw new IllegalArgumentException(
"A normal ConnectorResource can only be registered for legacy components.");
}
ConnectorResource connectorResource = (ConnectorResource) resource;
if (!legacyResourceKeys.containsKey(resource)) {
String uri = LEGACY_TYPE + '/' + Integer.toString(nextLegacyId++);
String filename = connectorResource.getFilename();
if (filename != null && !filename.isEmpty()) {
uri += '/' + filename;
}
legacyResourceKeys.put(connectorResource, uri);
legacyResources.put(uri, connectorResource);
registerResourceUsage(connectorResource, ownerConnector);
}
}
}
@Override
public boolean handleConnectorRequest(VaadinRequest request, VaadinResponse response, String path)
throws IOException {
DownloadStream stream = null;
String[] parts = path.split("/", 2);
String key = parts[0];
VaadinSession session = getSession();
session.lock();
try {
ConnectorResource resource = (ConnectorResource) getResource(key);
if (resource == null) {
return false;
}
stream = resource.getStream();
} finally {
session.unlock();
}
stream.writeResponse(request, response);
return true;
}
