content: /*
   * 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.chemistry.opencmis.server.impl.endpoints;
  
  import java.io.InputStream;
  
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.chemistry.opencmis.commons.endpoints.CmisEndpointsDocument;
  import org.apache.chemistry.opencmis.commons.impl.IOUtils;
  import org.apache.chemistry.opencmis.commons.impl.UrlBuilder;
  import org.apache.chemistry.opencmis.commons.impl.json.parser.JSONParseException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A simple CMIS Endpoints Document servlet.
   * 
   * It reads an endpoints document from a file replace some strings.
   */
  public class SimpleCmisEndpointsDocumentServlet extends AbstractCmisEndpointsDocumentServlet {
  
      private static final long serialVersionUID = 1L;
      private static final Logger LOG = LoggerFactory.getLogger(SimpleCmisEndpointsDocumentServlet.class);
  
      private static final String PARAM_ENDPOINT_TEMPLATE = "template";
  
      private String endpointsDocument;
  
      @Override
      public void init(ServletConfig config) throws ServletException {
          super.init(config);
  
          String template = config.getInitParameter(PARAM_ENDPOINT_TEMPLATE);
          if (template == null) {
              LOG.error("CMIS Endpoints Document template provided!");
              return;
          }
  
          // load template from file
          InputStream stream = null;
          try {
              stream = config.getServletContext().getResourceAsStream(template);
              if (stream != null) {
                  endpointsDocument = IOUtils.readAllLines(stream);
              }
          } catch (Exception e) {
              LOG.error("Could not read CMIS Endpoints Document template from {}!", template, e);
          } finally {
              IOUtils.closeQuietly(stream);
          }
      }
  
      @Override
      public CmisEndpointsDocument getCmisEndpointsDocument(HttpServletRequest req, HttpServletResponse resp) {
          if (endpointsDocument == null) {
              // we don't have a template
              return null;
          }
  
          UrlBuilder url = new UrlBuilder(req.getScheme(), req.getServerName(), req.getServerPort(), null);
          url.addPath(req.getContextPath());
  
          try {
              return readCmisEndpointsDocument(endpointsDocument.replaceAll("\\{webapp\\}", url.toString()));
          } catch (JSONParseException e) {
              LOG.error("Invalid JSON!", e);
              return null;
          }
      }
  }
  