package org.frameworkset.web.socket.container;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.websocket.Decoder;
import javax.websocket.Encoder;
import javax.websocket.Endpoint;
import javax.websocket.Extension;
import javax.websocket.server.ServerEndpointConfig;
import org.frameworkset.http.ServerHttpRequest;
import org.frameworkset.http.ServerHttpResponse;
import org.frameworkset.util.ClassUtils;
import org.frameworkset.util.ReflectionUtils;
import org.frameworkset.web.socket.endpoint.ServerEndpointRegistration;
import org.frameworkset.web.socket.handler.HandshakeFailureException;
import org.xnio.StreamConnection;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.HttpUpgradeListener;
import io.undertow.servlet.api.InstanceFactory;
import io.undertow.servlet.api.InstanceHandle;
import io.undertow.servlet.websockets.ServletWebSocketHttpExchange;
import io.undertow.util.PathTemplate;
import io.undertow.websockets.core.WebSocketChannel;
import io.undertow.websockets.core.WebSocketVersion;
import io.undertow.websockets.core.protocol.Handshake;
import io.undertow.websockets.jsr.ConfiguredServerEndpoint;
import io.undertow.websockets.jsr.EncodingFactory;
import io.undertow.websockets.jsr.EndpointSessionHandler;
import io.undertow.websockets.jsr.ServerWebSocketContainer;
import io.undertow.websockets.jsr.annotated.AnnotatedEndpointFactory;
import io.undertow.websockets.jsr.handshake.HandshakeUtil;
import io.undertow.websockets.jsr.handshake.JsrHybi07Handshake;
import io.undertow.websockets.jsr.handshake.JsrHybi08Handshake;
import io.undertow.websockets.jsr.handshake.JsrHybi13Handshake;
import io.undertow.websockets.spi.WebSocketHttpExchange;
/**
* A WebSocket {@code RequestUpgradeStrategy} for use with WildFly and its
* underlying Undertow web server. Also compatible with embedded Undertow usage.
*
* <p>Compatible with Undertow 1.0 to 1.3 - as included in WildFly 8.x, 9 and 10.
*
* @author Rossen Stoyanchev
* @author Brian Clozel
* @author Juergen Hoeller
* @since 4.0.1
*/
public class UndertowRequestUpgradeStrategy extends AbstractStandardUpgradeStrategy {
private static final Constructor<ServletWebSocketHttpExchange> exchangeConstructor;
private static final boolean exchangeConstructorWithPeerConnections;
private static final Constructor<ConfiguredServerEndpoint> endpointConstructor;
private static final boolean endpointConstructorWithEndpointFactory;
private static final Method getBufferPoolMethod;
private static final Method createChannelMethod;
static {
try {
Class<ServletWebSocketHttpExchange> exchangeType = ServletWebSocketHttpExchange.class;
Class<?>[] exchangeParamTypes =
new Class<?>[] {HttpServletRequest.class, HttpServletResponse.class, Set.class};
Constructor<ServletWebSocketHttpExchange> exchangeCtor =
ClassUtils.getConstructorIfAvailable(exchangeType, exchangeParamTypes);
if (exchangeCtor != null) {
// Undertow 1.1+
exchangeConstructor = exchangeCtor;
exchangeConstructorWithPeerConnections = true;
}
else {
// Undertow 1.0
exchangeParamTypes = new Class<?>[] {HttpServletRequest.class, HttpServletResponse.class};
exchangeConstructor = exchangeType.getConstructor(exchangeParamTypes);
exchangeConstructorWithPeerConnections = false;
}
Class<ConfiguredServerEndpoint> endpointType = ConfiguredServerEndpoint.class;
Class<?>[] endpointParamTypes = new Class<?>[] {ServerEndpointConfig.class, InstanceFactory.class,
PathTemplate.class, EncodingFactory.class, AnnotatedEndpointFactory.class};
Constructor<ConfiguredServerEndpoint> endpointCtor =
ClassUtils.getConstructorIfAvailable(endpointType, endpointParamTypes);
if (endpointCtor != null) {
// Undertow 1.1+
endpointConstructor = endpointCtor;
endpointConstructorWithEndpointFactory = true;
}
else {
// Undertow 1.0
endpointParamTypes = new Class<?>[] {ServerEndpointConfig.class, InstanceFactory.class,
PathTemplate.class, EncodingFactory.class};
endpointConstructor = endpointType.getConstructor(endpointParamTypes);
endpointConstructorWithEndpointFactory = false;
}
// Adapting between different Pool API types in Undertow 1.0-1.2 vs 1.3
getBufferPoolMethod = WebSocketHttpExchange.class.getMethod("getBufferPool");
createChannelMethod = ReflectionUtils.findMethod(Handshake.class, "createChannel", (Class<?>[]) null);
}
catch (Throwable ex) {
throw new IllegalStateException("Incompatible Undertow API version", ex);
}
}
private static final String[] supportedVersions = new String[] {
WebSocketVersion.V13.toHttpHeaderValue(),
WebSocketVersion.V08.toHttpHeaderValue(),
WebSocketVersion.V07.toHttpHeaderValue()
};
private final Set<WebSocketChannel> peerConnections;
public UndertowRequestUpgradeStrategy() {
if (exchangeConstructorWithPeerConnections) {
this.peerConnections = Collections.newSetFromMap(new ConcurrentHashMap<WebSocketChannel, Boolean>());
}
else {
this.peerConnections = null;
}
}
@Override
public String[] getSupportedVersions() {
return supportedVersions;
}
@Override
protected void upgradeInternal(ServerHttpRequest request, ServerHttpResponse response,
String selectedProtocol, List<Extension> selectedExtensions, final Endpoint endpoint)
throws HandshakeFailureException {
HttpServletRequest servletRequest = getHttpServletRequest(request);
HttpServletResponse servletResponse = getHttpServletResponse(response);
final ServletWebSocketHttpExchange exchange = createHttpExchange(servletRequest, servletResponse);
exchange.putAttachment(HandshakeUtil.PATH_PARAMS, Collections.<String, String>emptyMap());
ServerWebSocketContainer wsContainer = (ServerWebSocketContainer) getContainer(servletRequest);
final EndpointSessionHandler endpointSessionHandler = new EndpointSessionHandler(wsContainer);
final ConfiguredServerEndpoint configuredServerEndpoint = createConfiguredServerEndpoint(
selectedProtocol, selectedExtensions, endpoint, servletRequest);
final Handshake handshake = getHandshakeToUse(exchange, configuredServerEndpoint);
exchange.upgradeChannel(new HttpUpgradeListener() {
@Override
public void handleUpgrade(StreamConnection connection, HttpServerExchange serverExchange) {
Object bufferPool = ReflectionUtils.invokeMethod(getBufferPoolMethod, exchange);
WebSocketChannel channel = (WebSocketChannel) ReflectionUtils.invokeMethod(
createChannelMethod, handshake, exchange, connection, bufferPool);
if (peerConnections != null) {
peerConnections.add(channel);
}
endpointSessionHandler.onConnect(exchange, channel);
}
});
handshake.handshake(exchange);
}
private ServletWebSocketHttpExchange createHttpExchange(HttpServletRequest request, HttpServletResponse response) {
try {
return (this.peerConnections != null ?
exchangeConstructor.newInstance(request, response, this.peerConnections) :
exchangeConstructor.newInstance(request, response));
}
catch (Exception ex) {
throw new HandshakeFailureException("Failed to instantiate ServletWebSocketHttpExchange", ex);
}
}
private Handshake getHandshakeToUse(ServletWebSocketHttpExchange exchange, ConfiguredServerEndpoint endpoint) {
Handshake handshake = new JsrHybi13Handshake(endpoint);
if (handshake.matches(exchange)) {
return handshake;
}
handshake = new JsrHybi08Handshake(endpoint);
if (handshake.matches(exchange)) {
return handshake;
}
handshake = new JsrHybi07Handshake(endpoint);
if (handshake.matches(exchange)) {
return handshake;
}
// Should never occur
throw new HandshakeFailureException("No matching Undertow Handshake found: " + exchange.getRequestHeaders());
}
private ConfiguredServerEndpoint createConfiguredServerEndpoint(String selectedProtocol,
List<Extension> selectedExtensions, Endpoint endpoint, HttpServletRequest servletRequest) {
String path = servletRequest.getRequestURI(); // shouldn't matter
ServerEndpointRegistration endpointRegistration = new ServerEndpointRegistration(path, endpoint);
endpointRegistration.setSubprotocols(Arrays.asList(selectedProtocol));
endpointRegistration.setExtensions(selectedExtensions);
EncodingFactory encodingFactory = new EncodingFactory(
Collections.<Class<?>, List<InstanceFactory<? extends Encoder>>>emptyMap(),
Collections.<Class<?>, List<InstanceFactory<? extends Decoder>>>emptyMap(),
Collections.<Class<?>, List<InstanceFactory<? extends Encoder>>>emptyMap(),
Collections.<Class<?>, List<InstanceFactory<? extends Decoder>>>emptyMap());
try {
return (endpointConstructorWithEndpointFactory ?
endpointConstructor.newInstance(endpointRegistration,
new EndpointInstanceFactory(endpoint), null, encodingFactory, null) :
endpointConstructor.newInstance(endpointRegistration,
new EndpointInstanceFactory(endpoint), null, encodingFactory));
}
catch (Exception ex) {
throw new HandshakeFailureException("Failed to instantiate ConfiguredServerEndpoint", ex);
}
}
private static class EndpointInstanceFactory implements InstanceFactory<Endpoint> {
private final Endpoint endpoint;
public EndpointInstanceFactory(Endpoint endpoint) {
this.endpoint = endpoint;
}
@Override
public InstanceHandle<Endpoint> createInstance() throws InstantiationException {
return new InstanceHandle<Endpoint>() {
@Override
public Endpoint getInstance() {
return endpoint;
}
@Override
public void release() {
}
};
}
}
}