io.undertow.server.handlers.builder.RewriteHandlerBuilder Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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.builder;
import io.undertow.attribute.ConstantExchangeAttribute;
import io.undertow.attribute.ExchangeAttribute;
import io.undertow.attribute.ExchangeAttributes;
import io.undertow.attribute.ReadOnlyAttributeException;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.SetAttributeHandler;
import io.undertow.UndertowLogger;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
/**
* @author Stuart Douglas
*/
public class RewriteHandlerBuilder implements HandlerBuilder {
@Override
public String name() {
return "rewrite";
}
@Override
public Map> parameters() {
return Collections.>singletonMap("value", ExchangeAttribute.class);
}
@Override
public Set requiredParameters() {
return Collections.singleton("value");
}
@Override
public String defaultParameter() {
return "value";
}
@Override
public HandlerWrapper build(final Map config) {
final ExchangeAttribute configValue = (ExchangeAttribute) config.get("value");
ExchangeAttribute tmpValue = null;
if(configValue instanceof ConstantExchangeAttribute) {
tmpValue = new ConstantExchangeAttribute(normalize(configValue.readAttribute(null)));
} else {
tmpValue = new ExchangeAttribute() {
@Override
public String readAttribute(HttpServerExchange exchange) {
return normalize(configValue.readAttribute(exchange));
}
@Override
public void writeAttribute(HttpServerExchange exchange, String newValue) throws ReadOnlyAttributeException {
throw new ReadOnlyAttributeException("constant", newValue);
}
public String toString() {
return "NDA";
};
};
}
final ExchangeAttribute value = tmpValue;
return new HandlerWrapper() {
@Override
public HttpHandler wrap(HttpHandler handler) {
return new SetAttributeHandler(handler, ExchangeAttributes.relativePath(), value){
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
UndertowLogger.PREDICATE_LOGGER.debugf("Request rewritten to [%s] for %s.", getValue().readAttribute(exchange), exchange);
super.handleRequest(exchange);
}
@Override
public String toString() {
return "rewrite( '" + getValue().toString() + "' )";
}
};
}
};
}
private String normalize(final String readAttribute) {
if (readAttribute.startsWith("/")) {
return readAttribute;
} else {
return "/" + readAttribute;
}
}
}