spring WebSphereRequestUpgradeStrategy 源码

spring WebSphereRequestUpgradeStrategy 代码

文件路径：/spring-websocket/src/main/java/org/springframework/web/socket/server/standard/WebSphereRequestUpgradeStrategy.java

/*
 * Copyright 2002-2021 the original author or authors.
 *
 * 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
 *
 *      https://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 org.springframework.web.socket.server.standard;

import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.websocket.Endpoint;
import jakarta.websocket.Extension;
import jakarta.websocket.server.ServerContainer;
import jakarta.websocket.server.ServerEndpointConfig;

import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.lang.Nullable;
import org.springframework.web.socket.server.HandshakeFailureException;

/**
 * WebSphere support for upgrading an {@link HttpServletRequest} during a
 * WebSocket handshake. To modify properties of the underlying
 * {@link jakarta.websocket.server.ServerContainer} you can use
 * {@link ServletServerContainerFactoryBean} in XML configuration or, when using
 * Java configuration, access the container instance through the
 * "javax.websocket.server.ServerContainer" ServletContext attribute.
 *
 * <p>Tested with WAS Liberty beta (August 2015) for the upcoming 8.5.5.7 release.
 *
 * @author Rossen Stoyanchev
 * @since 4.2.1
 */
public class WebSphereRequestUpgradeStrategy extends AbstractStandardUpgradeStrategy {

	private static final Method upgradeMethod;

	static {
		ClassLoader loader = WebSphereRequestUpgradeStrategy.class.getClassLoader();
		try {
			Class<?> type = loader.loadClass("com.ibm.websphere.wsoc.WsWsocServerContainer");
			upgradeMethod = type.getMethod("doUpgrade", HttpServletRequest.class,
					HttpServletResponse.class, ServerEndpointConfig.class, Map.class);
		}
		catch (Exception ex) {
			throw new IllegalStateException("No compatible WebSphere version found", ex);
		}
	}


	@Override
	public String[] getSupportedVersions() {
		return new String[] {"13"};
	}

	@Override
	public void upgradeInternal(ServerHttpRequest httpRequest, ServerHttpResponse httpResponse,
			@Nullable String selectedProtocol, List<Extension> selectedExtensions, Endpoint endpoint)
			throws HandshakeFailureException {

		HttpServletRequest request = getHttpServletRequest(httpRequest);
		HttpServletResponse response = getHttpServletResponse(httpResponse);

		StringBuffer requestUrl = request.getRequestURL();
		String path = request.getRequestURI();  // shouldn't matter
		Map<String, String> pathParams = Collections.<String, String> emptyMap();

		ServerEndpointRegistration endpointConfig = new ServerEndpointRegistration(path, endpoint);
		endpointConfig.setSubprotocols(Collections.singletonList(selectedProtocol));
		endpointConfig.setExtensions(selectedExtensions);

		try {
			ServerContainer container = getContainer(request);
			upgradeMethod.invoke(container, request, response, endpointConfig, pathParams);
		}
		catch (Exception ex) {
			throw new HandshakeFailureException(
					"Servlet request failed to upgrade to WebSocket for " + requestUrl, ex);
		}
	}

}

相关信息

spring 源码目录

相关文章

spring AbstractStandardUpgradeStrategy 源码

spring AbstractTyrusRequestUpgradeStrategy 源码

spring GlassFishRequestUpgradeStrategy 源码

spring ServerEndpointExporter 源码

spring ServerEndpointRegistration 源码

spring ServletServerContainerFactoryBean 源码

spring SpringConfigurator 源码

spring TomcatRequestUpgradeStrategy 源码

spring UndertowRequestUpgradeStrategy 源码

spring WebLogicRequestUpgradeStrategy 源码