org.opennms.web.api.HtmlInjector Maven / Gradle / Ivy

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/*
 * Licensed to The OpenNMS Group, Inc (TOG) under one or more
 * contributor license agreements.  See the LICENSE.md file
 * distributed with this work for additional information
 * regarding copyright ownership.
 *
 * TOG licenses this file to You under the GNU Affero General
 * Public License Version 3 (the "License") or (at your option)
 * any later version.  You may not use this file except in
 * compliance with the License.  You may obtain a copy of the
 * License at:
 *
 *      https://www.gnu.org/licenses/agpl-3.0.txt
 *
 * 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.opennms.web.api;

import javax.servlet.http.HttpServletRequest;

/**
 * Allows services to inject HTML content at arbitrary URLs.
 *
 * @author jwhite
 */
public interface HtmlInjector {

    /**
     * Inject content into the current page.
     *
     * @param request the current HTTP request
     * @return HTML content to inject, or null
     */
    String inject(HttpServletRequest request) throws Exception;

}