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Camel HTTP common

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.camel.http.common;

import org.apache.camel.Producer;

/**
 * Allows to plugin custom strategy for rewriting url.
 * 
 * This allows for example to proxy http services and plugin a url rewrite
 * strategy such as the url-rewrite component.
 */
public interface UrlRewrite {

    /**
     * Rewrite the url.
     *
     * @param url  the absolute url (eg with scheme://host:port/path?query)
     * @param relativeUrl optional relative url, if bridging endpoints, which then would be without the base path from the
     *                    endpoint from the given producer.
     * @param producer the producer to use the rewritten url
     * @return the rewritten url, or null to use the original url
     * @throws Exception is thrown if error rewriting the url
     */
    String rewrite(String url, String relativeUrl, Producer producer) throws Exception;

}