/*
* 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.server;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import io.undertow.server.handlers.Cookie;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.util.ConduitFactory;
import org.xnio.conduits.StreamSinkConduit;
/**
*
* Handler that appends the JVM route to the session id.
*
* @author Stuart Douglas
*/
public class JvmRouteHandler implements HttpHandler {
private final HttpHandler next;
private final String sessionCookieName;
private final String jvmRoute;
private final JvmRouteWrapper wrapper = new JvmRouteWrapper();
public JvmRouteHandler(HttpHandler next, String sessionCookieName, String jvmRoute) {
this.next = next;
this.sessionCookieName = sessionCookieName;
this.jvmRoute = jvmRoute;
}
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
Cookie sessionId = exchange.getRequestCookies().get(sessionCookieName);
if (sessionId != null) {
int part = sessionId.getValue().indexOf('.');
if (part != -1) {
sessionId.setValue(sessionId.getValue().substring(0, part));
}
}
exchange.addResponseWrapper(wrapper);
next.handleRequest(exchange);
}
private class JvmRouteWrapper implements ConduitWrapper<StreamSinkConduit> {
@Override
public StreamSinkConduit wrap(ConduitFactory<StreamSinkConduit> factory, HttpServerExchange exchange) {
Cookie sessionId = exchange.getResponseCookies().get(sessionCookieName);
if (sessionId != null) {
StringBuilder sb = new StringBuilder(sessionId.getValue());
sb.append('.');
sb.append(jvmRoute);
sessionId.setValue(sb.toString());
}
return factory.create();
}
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "jvm-route";
}
@Override
public Map<String, Class<?>> parameters() {
Map<String, Class<?>> params = new HashMap<>();
params.put("value", String.class);
params.put("session-cookie-name", String.class);
return params;
}
@Override
public Set<String> requiredParameters() {
return Collections.singleton("value");
}
@Override
public String defaultParameter() {
return "value";
}
@Override
public HandlerWrapper build(Map<String, Object> config) {
String sessionCookieName = (String) config.get("session-cookie-name");
return new Wrapper((String)config.get("value"), sessionCookieName == null ? "JSESSIONID" : sessionCookieName);
}
}
private static class Wrapper implements HandlerWrapper {
private final String value;
private final String sessionCookieName;
private Wrapper(String value, String sessionCookieName) {
this.value = value;
this.sessionCookieName = sessionCookieName;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new JvmRouteHandler(handler, sessionCookieName, value);
}
}
}