| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Cognos Incorporated, IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Cognos Incorporated - initial API and implementation |
| * IBM Corporation - bug fixes and enhancements |
| *******************************************************************************/ |
| |
| package org.eclipse.equinox.http.registry.internal; |
| |
| import java.io.IOException; |
| import java.util.*; |
| import javax.servlet.*; |
| import javax.servlet.Filter; |
| import org.eclipse.core.runtime.*; |
| import org.osgi.framework.*; |
| |
| public class FilterManager implements ExtensionPointTracker.Listener { |
| |
| private static final String FILTERS_EXTENSION_POINT = "org.eclipse.equinox.http.registry.filters"; //$NON-NLS-1$ |
| |
| private static final String HTTPCONTEXT_NAME = "httpcontext-name"; //$NON-NLS-1$ |
| |
| private static final String PARAM_VALUE = "value"; //$NON-NLS-1$ |
| |
| private static final String PARAM_NAME = "name"; //$NON-NLS-1$ |
| |
| private static final String INIT_PARAM = "init-param"; //$NON-NLS-1$ |
| |
| private static final String ALIAS = "alias"; //$NON-NLS-1$ |
| |
| private static final String LOAD_ON_STARTUP = "load-on-startup"; //$NON-NLS-1$ |
| |
| private static final String HTTPCONTEXT_ID = "httpcontextId"; //$NON-NLS-1$ |
| |
| private static final String SERVICESELECTOR = "serviceSelector"; //$NON-NLS-1$ |
| |
| private static final String CLASS = "class"; //$NON-NLS-1$ |
| |
| private static final String FILTER = "filter"; //$NON-NLS-1$ |
| |
| private ExtensionPointTracker tracker; |
| |
| private HttpRegistryManager httpRegistryManager; |
| |
| private Map registered = new HashMap(); |
| |
| private ServiceReference reference; |
| |
| public FilterManager(HttpRegistryManager httpRegistryManager, ServiceReference reference, IExtensionRegistry registry) { |
| this.httpRegistryManager = httpRegistryManager; |
| this.reference = reference; |
| tracker = new ExtensionPointTracker(registry, FILTERS_EXTENSION_POINT, this); |
| } |
| |
| public void start() { |
| tracker.open(); |
| } |
| |
| public void stop() { |
| tracker.close(); |
| } |
| |
| public void added(IExtension extension) { |
| IConfigurationElement[] elements = extension.getConfigurationElements(); |
| for (int i = 0; i < elements.length; i++) { |
| IConfigurationElement serviceSelectorElement = elements[i]; |
| if (!SERVICESELECTOR.equals(serviceSelectorElement.getName())) |
| continue; |
| |
| org.osgi.framework.Filter serviceSelector = null; |
| String clazz = serviceSelectorElement.getAttribute(CLASS); |
| if (clazz != null) { |
| try { |
| serviceSelector = (org.osgi.framework.Filter) serviceSelectorElement.createExecutableExtension(CLASS); |
| } catch (CoreException e) { |
| // log it. |
| e.printStackTrace(); |
| return; |
| } |
| } else { |
| String filter = serviceSelectorElement.getAttribute(FILTER); |
| if (filter == null) |
| return; |
| |
| try { |
| serviceSelector = FrameworkUtil.createFilter(filter); |
| } catch (InvalidSyntaxException e) { |
| // log it. |
| e.printStackTrace(); |
| return; |
| } |
| } |
| |
| if (!serviceSelector.match(reference)) |
| return; |
| |
| break; |
| } |
| |
| for (int i = 0; i < elements.length; i++) { |
| IConfigurationElement filterElement = elements[i]; |
| if (!FILTER.equals(filterElement.getName())) |
| continue; |
| |
| FilterWrapper wrapper = new FilterWrapper(filterElement); |
| String alias = filterElement.getAttribute(ALIAS); |
| if (alias == null) |
| continue; // alias is mandatory - ignore this. |
| |
| Dictionary initparams = new Hashtable(); |
| IConfigurationElement[] initParams = filterElement.getChildren(INIT_PARAM); |
| for (int j = 0; j < initParams.length; ++j) { |
| String paramName = initParams[j].getAttribute(PARAM_NAME); |
| String paramValue = initParams[j].getAttribute(PARAM_VALUE); |
| initparams.put(paramName, paramValue); |
| } |
| |
| boolean loadOnStartup = Boolean.valueOf(filterElement.getAttribute(LOAD_ON_STARTUP)).booleanValue(); |
| if (loadOnStartup) |
| wrapper.setLoadOnStartup(); |
| |
| String httpContextId = filterElement.getAttribute(HTTPCONTEXT_ID); |
| if (httpContextId == null) { |
| httpContextId = filterElement.getAttribute(HTTPCONTEXT_NAME); |
| } |
| |
| if (httpContextId != null && httpContextId.indexOf('.') == -1) |
| httpContextId = filterElement.getNamespaceIdentifier() + "." + httpContextId; //$NON-NLS-1$ |
| |
| if (httpRegistryManager.addFilterContribution(alias, wrapper, initparams, httpContextId, extension.getContributor())) |
| registered.put(filterElement, wrapper); |
| } |
| } |
| |
| public void removed(IExtension extension) { |
| IConfigurationElement[] elements = extension.getConfigurationElements(); |
| for (int i = 0; i < elements.length; i++) { |
| IConfigurationElement filterElement = elements[i]; |
| Filter filter = (Filter) registered.remove(filterElement); |
| if (filter != null) |
| httpRegistryManager.removeFilterContribution(filter); |
| } |
| } |
| |
| private static class FilterWrapper implements Filter { |
| |
| private IConfigurationElement element; |
| private Filter delegate; |
| private FilterConfig config; |
| private boolean loadOnStartup = false; |
| |
| public FilterWrapper(IConfigurationElement element) { |
| this.element = element; |
| } |
| |
| public void setLoadOnStartup() { |
| this.loadOnStartup = true; |
| } |
| |
| public void init(FilterConfig filterConfig) throws ServletException { |
| this.config = filterConfig; |
| if (loadOnStartup) |
| initializeDelegate(); |
| } |
| |
| public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain chain) throws ServletException, IOException { |
| initializeDelegate(); |
| delegate.doFilter(arg0, arg1, chain); |
| } |
| |
| public void destroy() { |
| destroyDelegate(); |
| } |
| |
| private synchronized void initializeDelegate() throws ServletException { |
| if (delegate == null) { |
| try { |
| Filter newDelegate = (Filter) element.createExecutableExtension(CLASS); |
| newDelegate.init(config); |
| delegate = newDelegate; |
| } catch (CoreException e) { |
| throw new ServletException(e); |
| } |
| } |
| } |
| |
| private synchronized void destroyDelegate() { |
| if (delegate != null) { |
| Filter doomedDelegate = delegate; |
| delegate = null; |
| doomedDelegate.destroy(); |
| } |
| } |
| } |
| } |