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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.websockets.jsr;
import io.undertow.server.session.SecureRandomSessionIdGenerator;
import io.undertow.servlet.api.InstanceHandle;
import io.undertow.util.WorkerUtils;
import io.undertow.websockets.client.WebSocketClient;
import io.undertow.websockets.core.CloseMessage;
import io.undertow.websockets.core.WebSocketChannel;
import io.undertow.websockets.core.WebSockets;
import org.xnio.ChannelListener;
import org.xnio.IoFuture;
import org.xnio.IoUtils;
import javax.websocket.CloseReason;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.Extension;
import javax.websocket.MessageHandler;
import javax.websocket.RemoteEndpoint;
import javax.websocket.Session;
import java.io.IOException;
import java.net.URI;
import java.security.Principal;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* {@link Session} implementation which makes use of the high-level WebSocket API of undertow under the hood.
*
* @author Norman Maurer
*/
public final class UndertowSession implements Session {
private final String sessionId;
private WebSocketChannel webSocketChannel;
private FrameHandler frameHandler;
private final ServerWebSocketContainer container;
private final Principal user;
private final WebSocketSessionRemoteEndpoint remote;
private final Map attrs;
private final Map> requestParameterMap;
private final URI requestUri;
private final String queryString;
private final Map pathParameters;
private final InstanceHandle endpoint;
private final Encoding encoding;
private final AtomicBoolean closed = new AtomicBoolean();
private final SessionContainer openSessions;
private final String subProtocol;
private final List extensions;
private final WebSocketClient.ConnectionBuilder clientConnectionBuilder;
private final EndpointConfig config;
private volatile int maximumBinaryBufferSize = 0;
private volatile int maximumTextBufferSize = 0;
private volatile boolean localClose;
private int disconnectCount = 0;
private int failedCount = 0;
UndertowSession(WebSocketChannel webSocketChannel, URI requestUri, Map pathParameters,
Map> requestParameterMap, EndpointSessionHandler handler, Principal user,
InstanceHandle endpoint, EndpointConfig config, final String queryString,
final Encoding encoding, final SessionContainer openSessions, final String subProtocol,
final List extensions, WebSocketClient.ConnectionBuilder clientConnectionBuilder) {
assert openSessions != null;
this.webSocketChannel = webSocketChannel;
this.queryString = queryString;
this.encoding = encoding;
this.openSessions = openSessions;
this.clientConnectionBuilder = clientConnectionBuilder;
container = handler.getContainer();
this.user = user;
this.requestUri = requestUri;
this.requestParameterMap = Collections.unmodifiableMap(requestParameterMap);
this.pathParameters = Collections.unmodifiableMap(pathParameters);
this.config = config;
remote = new WebSocketSessionRemoteEndpoint(this, encoding);
this.endpoint = endpoint;
this.sessionId = new SecureRandomSessionIdGenerator().createSessionId();
this.attrs = Collections.synchronizedMap(new HashMap<>(config.getUserProperties()));
this.extensions = extensions;
this.subProtocol = subProtocol;
setupWebSocketChannel(webSocketChannel);
}
@Override
public ServerWebSocketContainer getContainer() {
return container;
}
@SuppressWarnings({"rawtypes", "unchecked"})
@Override
public synchronized void addMessageHandler(MessageHandler messageHandler) throws IllegalStateException {
frameHandler.addHandler(messageHandler);
}
@Override
public void addMessageHandler(Class clazz, MessageHandler.Whole handler) {
frameHandler.addHandler(clazz, handler);
}
@Override
public void addMessageHandler(Class clazz, MessageHandler.Partial handler) {
frameHandler.addHandler(clazz, handler);
}
@SuppressWarnings("rawtypes")
@Override
public synchronized Set getMessageHandlers() {
return frameHandler.getHandlers();
}
@SuppressWarnings({"rawtypes", "unchecked"})
@Override
public synchronized void removeMessageHandler(MessageHandler messageHandler) {
frameHandler.removeHandler(messageHandler);
}
/**
* sets the recieve listener This should only be used for annotated endpoints.
*
* @param handler The handler
*/
public void setReceiveListener(final ChannelListener handler) {
webSocketChannel.getReceiveSetter().set(handler);
}
@Override
public String getProtocolVersion() {
return webSocketChannel.getVersion().toHttpHeaderValue();
}
@Override
public String getNegotiatedSubprotocol() {
return subProtocol == null ? "" : subProtocol;
}
@Override
public boolean isSecure() {
return webSocketChannel.isSecure();
}
@Override
public boolean isOpen() {
return webSocketChannel.isOpen();
}
@Override
public long getMaxIdleTimeout() {
return webSocketChannel.getIdleTimeout();
}
@Override
public void setMaxIdleTimeout(final long milliseconds) {
webSocketChannel.setIdleTimeout(milliseconds);
}
@Override
public String getId() {
return sessionId;
}
@Override
public void close() throws IOException {
close(new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, null));
}
@Override
public void close(CloseReason closeReason) throws IOException {
localClose = true;
closeInternal(closeReason);
}
public void closeInternal() throws IOException {
closeInternal(new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, null));
}
public void closeInternal(CloseReason closeReason) throws IOException {
if(closed.compareAndSet(false, true)) {
try {
try {
if (!webSocketChannel.isCloseFrameReceived() && !webSocketChannel.isCloseFrameSent()) {
//if we have already recieved a close frame then the close frame handler
//will deal with sending back the reason message
if (closeReason == null || closeReason.getCloseCode().getCode() == CloseReason.CloseCodes.NO_STATUS_CODE.getCode()) {
webSocketChannel.sendClose();
} else {
WebSockets.sendClose(new CloseMessage(closeReason.getCloseCode().getCode(), closeReason.getReasonPhrase()).toByteBuffer(), webSocketChannel, null);
}
}
} finally {
try {
String reason = null;
CloseReason.CloseCode code = CloseReason.CloseCodes.NO_STATUS_CODE;
if(webSocketChannel.getCloseCode() != -1) {
reason = webSocketChannel.getCloseReason();
code = CloseReason.CloseCodes.getCloseCode(webSocketChannel.getCloseCode());
} else if(closeReason != null) {
reason = closeReason.getReasonPhrase();
code = closeReason.getCloseCode();
}
//horrible hack
//the spec says that if we (the local container) close locally then we need to use 1006
//although the TCK does not expect this behaviour for TOO_BIG and VIOLATED_POLICY
//we need to really clean up the close behaviour in the next spec
if(!webSocketChannel.isCloseInitiatedByRemotePeer() && !localClose && code.getCode() != CloseReason.CloseCodes.TOO_BIG.getCode() && code.getCode() != CloseReason.CloseCodes.VIOLATED_POLICY.getCode()) {
//2.1.5: we must use 1006 if the close was initiated locally
//however we only do this for normal closure
//if the close was due to another reason such as a message being too long we need to report the real reason
code = CloseReason.CloseCodes.CLOSED_ABNORMALLY;
}
endpoint.getInstance().onClose(this, new CloseReason(code, reason));
} catch (Exception e) {
endpoint.getInstance().onError(this, e);
}
}
} finally {
close0();
if(clientConnectionBuilder != null && !localClose) {
WebSocketReconnectHandler webSocketReconnectHandler = container.getWebSocketReconnectHandler();
if (webSocketReconnectHandler != null) {
JsrWebSocketLogger.REQUEST_LOGGER.debugf("Calling reconnect handler for %s", this);
long reconnect = webSocketReconnectHandler.disconnected(closeReason, requestUri, this, ++disconnectCount);
if (reconnect >= 0) {
handleReconnect(reconnect);
}
}
}
}
}
}
private void handleReconnect(final long reconnect) {
JsrWebSocketLogger.REQUEST_LOGGER.debugf("Attempting reconnect in %s ms for session %s", reconnect, this);
WorkerUtils.executeAfter(webSocketChannel.getIoThread(), new Runnable() {
@Override
public void run() {
clientConnectionBuilder.connect().addNotifier(new IoFuture.HandlingNotifier() {
@Override
public void handleDone(WebSocketChannel data, Object attachment) {
closed.set(false);
UndertowSession.this.webSocketChannel = data;
UndertowSession.this.setupWebSocketChannel(data);
localClose = false;
endpoint.getInstance().onOpen(UndertowSession.this, config);
webSocketChannel.resumeReceives();
}
@Override
public void handleFailed(IOException exception, Object attachment) {
long timeout = container.getWebSocketReconnectHandler().reconnectFailed(exception, getRequestURI(), UndertowSession.this, ++failedCount);
if(timeout >= 0) {
handleReconnect(timeout);
}
}
}, null);
}
}, reconnect, TimeUnit.MILLISECONDS);
}
public void forceClose() {
IoUtils.safeClose(webSocketChannel);
}
@Override
public URI getRequestURI() {
return requestUri;
}
@Override
public Map> getRequestParameterMap() {
return requestParameterMap;
}
@Override
public String getQueryString() {
return queryString;
}
@Override
public Map getPathParameters() {
return pathParameters;
}
@Override
public Map getUserProperties() {
return attrs;
}
@Override
public Principal getUserPrincipal() {
return user;
}
@Override
public void setMaxBinaryMessageBufferSize(int i) {
maximumBinaryBufferSize = i;
}
@Override
public int getMaxBinaryMessageBufferSize() {
return maximumBinaryBufferSize;
//return (int) webSocketChannel.getMaximumBinaryFrameSize();
}
@Override
public void setMaxTextMessageBufferSize(int i) {
maximumTextBufferSize = i;
}
@Override
public int getMaxTextMessageBufferSize() {
return maximumTextBufferSize;
}
@Override
public RemoteEndpoint.Async getAsyncRemote() {
return remote.getAsync();
}
@Override
public RemoteEndpoint.Basic getBasicRemote() {
return remote.getBasic();
}
@Override
public Set getOpenSessions() {
return new HashSet<>(openSessions.getOpenSessions());
}
@Override
public List getNegotiatedExtensions() {
return extensions;
}
void close0() {
//we use the executor to preserve ordering
getExecutor().execute(new Runnable() {
@Override
public void run() {
try {
endpoint.release();
} finally {
try {
encoding.close();
} finally {
openSessions.removeOpenSession(UndertowSession.this);
}
}
}
});
}
public Encoding getEncoding() {
return encoding;
}
public WebSocketChannel getWebSocketChannel() {
return webSocketChannel;
}
private void setupWebSocketChannel(WebSocketChannel webSocketChannel) {
this.frameHandler = new FrameHandler(this, this.endpoint.getInstance());
webSocketChannel.getReceiveSetter().set(frameHandler);
webSocketChannel.addCloseTask(new ChannelListener() {
@Override
public void handleEvent(WebSocketChannel channel) {
//so this puts us in an interesting position. We know the underlying
//TCP connection has been torn down, however this may have involved reading
//a close frame, which will be delivered shortly
//to get around this we schedule the code in the IO thread, so if there is a close
//frame awaiting delivery it will be delivered before the close
channel.getIoThread().execute(new Runnable() {
@Override
public void run() {
//we delegate this execution to the IO thread
try {
closeInternal(new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, null));
} catch (IOException e) {
//ignore
}
}
});
}
});
}
public Executor getExecutor() {
return frameHandler.getExecutor();
}
boolean isSessionClosed() {
return closed.get();
}
}
