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/*******************************************************************************
* Copyright (c) 2005, 2016 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
* Raymond Augé - bug fixes and enhancements
* Arnaud Mergey <a_mergey@yahoo.fr> - Bug 497510
*******************************************************************************/
package org.eclipse.equinox.http.servlet.internal.servlet;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.CopyOnWriteArrayList;
import javax.servlet.*;
import javax.servlet.http.*;
import org.eclipse.equinox.http.servlet.internal.Activator;
import org.eclipse.equinox.http.servlet.internal.HttpServiceRuntimeImpl;
import org.eclipse.equinox.http.servlet.internal.context.DispatchTargets;
import org.eclipse.equinox.http.servlet.internal.registration.PreprocessorRegistration;
import org.eclipse.equinox.http.servlet.internal.util.Const;
import org.osgi.framework.ServiceReference;
import org.osgi.service.http.whiteboard.Preprocessor;
/**
* The ProxyServlet is the private side of a Servlet that when registered (and init() called) in a servlet container
* will in-turn register and provide an OSGi Http Service implementation.
* This class is not meant for extending or even using directly and is purely meant for registering
* in a servlet container.
*/
public class ProxyServlet extends HttpServlet {
private static final long serialVersionUID = 4117456123807468871L;
private HttpServiceRuntimeImpl httpServiceRuntimeImpl;
public void init(ServletConfig config) throws ServletException {
super.init(config);
Activator.addProxyServlet(this);
}
public void destroy() {
Activator.unregisterHttpService(this);
super.destroy();
}
public void setHttpServiceRuntimeImpl(
HttpServiceRuntimeImpl httpServiceRuntimeImpl) {
this.httpServiceRuntimeImpl = httpServiceRuntimeImpl;
}
public void sessionDestroyed(String sessionId) {
httpServiceRuntimeImpl.sessionDestroyed(sessionId);
}
public void sessionIdChanged(String oldSessionId) {
httpServiceRuntimeImpl.fireSessionIdChanged(oldSessionId);
}
/**
* get the value of path info, not decoded by the server
*/
private String getNotDecodedAlias(HttpServletRequest request) {
String pathInfo = HttpServletRequestWrapperImpl.getDispatchPathInfo(request);
if(pathInfo == null) {
return null;
}
String requestUri = HttpServletRequestWrapperImpl.getDispatchRequestURI(request);
return requestUri.substring(request.getContextPath().length() + request.getServletPath().length());
}
/**
* @see HttpServlet#service(ServletRequest, ServletResponse)
*/
protected void service(
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
checkRuntime();
String alias = getNotDecodedAlias(request);
if (alias == null) {
alias = Const.SLASH;
}
preprocess(request, response, alias, request.getDispatcherType());
}
public void preprocess(
HttpServletRequest request,
HttpServletResponse response, String alias, DispatcherType dispatcherType)
throws ServletException, IOException {
Map<ServiceReference<Preprocessor>, PreprocessorRegistration> registrations = httpServiceRuntimeImpl.getPreprocessorRegistrations();
if (registrations.isEmpty()) {
dispatch(request, response, alias, dispatcherType);
}
else {
List<PreprocessorRegistration> preprocessors = new CopyOnWriteArrayList<>();
for (Entry<ServiceReference<Preprocessor>, PreprocessorRegistration> entry : registrations.entrySet()) {
PreprocessorRegistration registration = entry.getValue();
preprocessors.add(registration);
registration.addReference();
}
try {
FilterChain chain = new PreprocessorChainImpl(preprocessors, alias, dispatcherType, this);
chain.doFilter(request, response);
}
finally {
for (PreprocessorRegistration registration : preprocessors) {
registration.removeReference();
}
}
}
}
public void dispatch(
HttpServletRequest request,
HttpServletResponse response, String alias, DispatcherType dispatcherType)
throws ServletException, IOException {
DispatchTargets dispatchTargets = httpServiceRuntimeImpl.getDispatchTargets(alias, null);
if (dispatchTargets != null) {
dispatchTargets.doDispatch(request, response, alias, dispatcherType);
return;
}
response.sendError(
HttpServletResponse.SC_NOT_FOUND, "ProxyServlet: " + alias); //$NON-NLS-1$
}
private void checkRuntime() {
if (httpServiceRuntimeImpl == null) {
throw new IllegalStateException(
"Proxy servlet not properly initialized. httpServiceRuntimeImpl is null"); //$NON-NLS-1$
}
}
}
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