public static final class ResponseStatusCodes {
public static final int CONTINUE_100 = HttpResponseStatus.CONTINUE.code();
public static final int SWITCHING_PROTOCOLS_101 = HttpResponseStatus.SWITCHING_PROTOCOLS.code();
public static final int OK_200 = HttpResponseStatus.OK.code();
public static final int MOVED_PERMANENTLY_301 = HttpResponseStatus.MOVED_PERMANENTLY.code();
public static final int FOUND_302 = HttpResponseStatus.FOUND.code();
public static final int SEE_OTHER_303 = HttpResponseStatus.SEE_OTHER.code();
public static final int NOT_MODIFIED_304 = HttpResponseStatus.NOT_MODIFIED.code();
public static final int TEMPORARY_REDIRECT_307 = HttpResponseStatus.TEMPORARY_REDIRECT.code();
public static final int UNAUTHORIZED_401 = HttpResponseStatus.UNAUTHORIZED.code();
public static final int PROXY_AUTHENTICATION_REQUIRED_407 =
HttpResponseStatus.PROXY_AUTHENTICATION_REQUIRED.code();
private ResponseStatusCodes() {}
}
/**
* An {@link AsyncHandler} which is able to execute WebSocket upgrade. Use the Builder for
* configuring WebSocket options.
*/
public class WebSocketUpgradeHandler implements UpgradeHandler<WebSocket>, AsyncHandler<WebSocket> {
private static final int SWITCHING_PROTOCOLS =
io.netty.handler.codec.http.HttpResponseStatus.SWITCHING_PROTOCOLS.code();
private WebSocket webSocket;
private final List<WebSocketListener> listeners;
private final AtomicBoolean ok = new AtomicBoolean(false);
private boolean onSuccessCalled;
private int status;
private List<Runnable> bufferedFrames;
public WebSocketUpgradeHandler(List<WebSocketListener> listeners) {
this.listeners = listeners;
}
public void bufferFrame(Runnable bufferedFrame) {
if (bufferedFrames == null) {
bufferedFrames = new ArrayList<>(1);
}
bufferedFrames.add(bufferedFrame);
}
/** {@inheritDoc} */
@Override
public final void onThrowable(Throwable t) {
onFailure(t);
}
public boolean touchSuccess() {
boolean prev = onSuccessCalled;
onSuccessCalled = true;
return prev;
}
/** {@inheritDoc} */
@Override
public final State onBodyPartReceived(HttpResponseBodyPart bodyPart) throws Exception {
return State.CONTINUE;
}
/** {@inheritDoc} */
@Override
public final State onStatusReceived(HttpResponseStatus responseStatus) throws Exception {
status = responseStatus.getStatusCode();
return status == SWITCHING_PROTOCOLS ? State.UPGRADE : State.ABORT;
}
/** {@inheritDoc} */
@Override
public final State onHeadersReceived(HttpResponseHeaders headers) throws Exception {
return State.CONTINUE;
}
/** {@inheritDoc} */
@Override
public final WebSocket onCompleted() throws Exception {
if (status != SWITCHING_PROTOCOLS) {
IllegalStateException e = new IllegalStateException("Invalid Status Code " + status);
for (WebSocketListener listener : listeners) {
listener.onError(e);
}
throw e;
}
return webSocket;
}
/** {@inheritDoc} */
@Override
public final void onSuccess(WebSocket webSocket) {
this.webSocket = webSocket;
for (WebSocketListener listener : listeners) {
webSocket.addWebSocketListener(listener);
listener.onOpen(webSocket);
}
if (isNonEmpty(bufferedFrames)) {
for (Runnable bufferedFrame : bufferedFrames) {
bufferedFrame.run();
}
bufferedFrames = null;
}
ok.set(true);
}
/** {@inheritDoc} */
@Override
public final void onFailure(Throwable t) {
for (WebSocketListener listener : listeners) {
if (!ok.get() && webSocket != null) {
webSocket.addWebSocketListener(listener);
}
listener.onError(t);
}
}
public final void onClose(WebSocket webSocket, int status, String reasonPhrase) {
// Connect failure
if (this.webSocket == null) this.webSocket = webSocket;
for (WebSocketListener listener : listeners) {
if (webSocket != null) {
webSocket.addWebSocketListener(listener);
}
listener.onClose(webSocket);
if (listener instanceof WebSocketCloseCodeReasonListener) {
WebSocketCloseCodeReasonListener.class
.cast(listener)
.onClose(webSocket, status, reasonPhrase);
}
}
}
/** Build a {@link WebSocketUpgradeHandler} */
public static final class Builder {
private List<WebSocketListener> listeners = new ArrayList<>(1);
/**
* Add a {@link WebSocketListener} that will be added to the {@link WebSocket}
*
* @param listener a {@link WebSocketListener}
* @return this
*/
public Builder addWebSocketListener(WebSocketListener listener) {
listeners.add(listener);
return this;
}
/**
* Remove a {@link WebSocketListener}
*
* @param listener a {@link WebSocketListener}
* @return this
*/
public Builder removeWebSocketListener(WebSocketListener listener) {
listeners.remove(listener);
return this;
}
/**
* Build a {@link WebSocketUpgradeHandler}
*
* @return a {@link WebSocketUpgradeHandler}
*/
public WebSocketUpgradeHandler build() {
return new WebSocketUpgradeHandler(listeners);
}
}
}