content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * 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.otter.manager.web.webx.valve.auth.url;
  
  import java.beans.PropertyEditorSupport;
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.StringReader;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.oro.text.regex.MalformedPatternException;
  import org.apache.oro.text.regex.Pattern;
  import org.apache.oro.text.regex.Perl5Compiler;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class URLProtectedEditor extends PropertyEditorSupport {
  
      private static final Logger logger = LoggerFactory.getLogger(URLProtectedEditor.class);
  
      @Override
      public void setAsText(String text) throws IllegalArgumentException {
          URLProtected urlProtected = new URLProtectedImpl(convertTextToPatterns(text));
          setValue(urlProtected);
      }
  
      /**
       * 把字符串文本转换成一堆Pattern,用于匹配URL
       */
      private List<URLPatternHolder> convertTextToPatterns(String text) {
          List<URLPatternHolder> list = new ArrayList<URLPatternHolder>();
          if (StringUtils.isNotEmpty(text)) {
              BufferedReader br = new BufferedReader(new StringReader(text));
              int counter = 0;
              String line;
              while (true) {
                  counter++;
                  try {
                      line = br.readLine();
                  } catch (IOException ioe) {
                      throw new IllegalArgumentException(ioe.getMessage());
                  }
                  if (line == null) {
                      break;
                  }
                  line = StringUtils.trim(line);
                  if (StringUtils.isBlank(line)) {
                      continue;
                  }
                  if (logger.isDebugEnabled()) {
                      logger.debug("Line " + counter + ": " + line);
                  }
                  list.add(convertStringToPattern(line));
              }
          }
          return list;
      }
  
      /**
       * 把字符串转成Pattern和UrlType
       * 
       * @param perl5RegExp
       * @return
       */
      private URLPatternHolder convertStringToPattern(String line) {
          URLPatternHolder holder = new URLPatternHolder();
          Pattern compiledPattern;
          Perl5Compiler compiler = new Perl5Compiler();
          String perl5RegExp = line;
          try {
              compiledPattern = compiler.compile(perl5RegExp, Perl5Compiler.READ_ONLY_MASK);
              holder.setCompiledPattern(compiledPattern);
          } catch (MalformedPatternException mpe) {
              throw new IllegalArgumentException("Malformed regular expression: " + perl5RegExp);
          }
  
          if (logger.isDebugEnabled()) {
              logger.debug("Added regular expression: " + compiledPattern.getPattern().toString());
          }
          return holder;
      }
  
  }
  