content: /*
   * Copyright 2023 Aiven Oy
   *
   * 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 io.aiven.kafka.tieredstorage.config.validators;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.util.List;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigException;
  
  /**
   * {@link org.apache.kafka.common.config.ConfigDef.Validator} implementation that verifies that a config value is
   * a valid URL with http or https schemes.
   */
  public class ValidUrl implements ConfigDef.Validator {
      private static final List<String> SUPPORTED_SCHEMAS = List.of("http", "https");
  
      @Override
      public void ensureValid(final String name, final Object value) {
          if (value != null) {
              try {
                  final var url = new URL((String) value);
                  if (!SUPPORTED_SCHEMAS.contains(url.getProtocol())) {
                      throw new ConfigException(name, value, "URL must have scheme from the list " + SUPPORTED_SCHEMAS);
                  }
              } catch (final MalformedURLException e) {
                  throw new ConfigException(name, value, "Must be a valid URL");
              }
          }
      }
  
      @Override
      public String toString() {
          return "Valid URL as defined in rfc2396";
      }
  }
  