content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.client.utils;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.client.env.NacosClientProperties;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * All parameter validation tools.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public final class ValidatorUtils {
      
      private static final Pattern CONTEXT_PATH_MATCH = Pattern.compile("(\\/)\\1+");
      
      public static void checkInitParam(NacosClientProperties properties) throws NacosException {
          checkContextPath(properties.getProperty(PropertyKeyConst.CONTEXT_PATH));
      }
      
      /**
       * Check context path.
       *
       * @param contextPath context path
       */
      public static void checkContextPath(String contextPath) {
          if (contextPath == null) {
              return;
          }
          Matcher matcher = CONTEXT_PATH_MATCH.matcher(contextPath);
          if (matcher.find()) {
              throw new IllegalArgumentException("Illegal url path expression");
          }
      }
      
  }
  