/*
* 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.handlers;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import io.undertow.attribute.ExchangeAttribute;
import io.undertow.attribute.ExchangeAttributeParser;
import io.undertow.attribute.ExchangeAttributes;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.util.Headers;
/**
* A redirect handler that redirects to the specified location via a 302 redirect.
* <p/>
* The location is specified as an exchange attribute string.
*
* @author Stuart Douglas
* @see ExchangeAttributes
*/
public class RedirectHandler implements HttpHandler {
private final ExchangeAttribute attribute;
public RedirectHandler(final String location) {
ExchangeAttributeParser parser = ExchangeAttributes.parser(getClass().getClassLoader());
attribute = parser.parse(location);
}
public RedirectHandler(final String location, final ClassLoader classLoader) {
ExchangeAttributeParser parser = ExchangeAttributes.parser(classLoader);
attribute = parser.parse(location);
}
public RedirectHandler(ExchangeAttribute attribute) {
this.attribute = attribute;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.setResponseCode(302);
exchange.getResponseHeaders().put(Headers.LOCATION, attribute.readAttribute(exchange));
exchange.endExchange();
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "redirect";
}
@Override
public Map<String, Class<?>> parameters() {
Map<String, Class<?>> params = new HashMap<>();
params.put("value", ExchangeAttribute.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) {
return new Wrapper((ExchangeAttribute)config.get("value"));
}
}
private static class Wrapper implements HandlerWrapper {
private final ExchangeAttribute value;
private Wrapper(ExchangeAttribute value) {
this.value = value;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new RedirectHandler(value);
}
}
}