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 com.alibaba.jstorm.ui.controller;
  
  import com.alibaba.jstorm.ui.utils.UIUtils;
  import org.apache.commons.lang.StringEscapeUtils;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.ModelMap;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  
  /**
   * @author Jark (wuchong.wc@alibaba-inc.com)
   */
  @Controller
  public class ConfController {
      private static final Logger LOG = LoggerFactory.getLogger(ConfController.class);
  
      @RequestMapping(value = "/conf", method = RequestMethod.GET)
      public String show(@RequestParam(value = "name", required = true) String name,
                         @RequestParam(value = "type", required = false) String type,
                         @RequestParam(value = "topology", required = false) String topologyId,
                         @RequestParam(value = "host", required = false) String host, ModelMap model) {
          if (StringUtils.isNotEmpty(host) && UIUtils.isValidSupervisorHost(name, host)) {
              UIUtils.addErrorAttribute(model, new RuntimeException("Not a valid host: " + host));
              return "conf";
          }
  
          name = StringEscapeUtils.escapeHtml(name);
          topologyId = StringEscapeUtils.escapeHtml(topologyId);
          String title = null;
          String uri = String.format("api/v2/cluster/%s", name);
          if (!StringUtils.isBlank(type)){
              if (type.equals("supervisor")) {
                  uri += String.format("/supervisor/%s/configuration", host);
                  title = "Supervisor Conf";
                  model.addAttribute("subtitle", host);
                  model.addAttribute("host", host);
              }else if(type.equals("topology")){
                  uri += String.format("/topology/%s/configuration", topologyId);
                  title = "Topology Conf";
                  model.addAttribute("subtitle", topologyId);
                  model.addAttribute("topologyId", topologyId);
              }
          } else {
              uri += "/configuration";
              title = "Nimbus Conf";
              model.addAttribute("subtitle", name);
          }
          model.addAttribute("clusterName", name);
          model.addAttribute("uri", uri);
          model.addAttribute("pageTitle", title);
          model.addAttribute("page", "conf");
          UIUtils.addTitleAttribute(model, "Configuration");
          return "conf";
      }
  
  }
  