Source Code : Add Default Port to a URL If Missing

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Add Default Port to a URL If Missing

    

/**
 * 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.
 */
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Utils {
  public static String addDefaultPortIfMissing(String urlString, String defaultPort) {
    URL url = null;
    try {
        url = new URL(urlString);
    } catch (MalformedURLException e) {
        return urlString;
    }
    if (url.getPort() != -1) {
        return urlString;
    }
    String regex = "http://([^/]+)";        
    String found = getFirstFound(urlString, regex);
    String replacer = "http://" + found + ":" + defaultPort;
    
    if (!isEmpty(found)) {
        urlString = urlString.replaceFirst(regex, replacer);
    }                
    return urlString;
}
  public static String getFirstFound(String contents, String regex) {
    List<String> founds = getFound(contents, regex);
    if (isEmpty(founds)) {
        return null;
    }
    return founds.get(0);
}
  public static List<String> getFound(String contents, String regex) {
      if (isEmpty(regex) || isEmpty(contents)) {
          return null;
      }
      List<String> results = new ArrayList<String>();
      Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CASE);
      Matcher matcher = pattern.matcher(contents);
      
      while (matcher.find()) {
          if (matcher.groupCount() > 0) {
              results.add(matcher.group(1));
          } else {
              results.add(matcher.group());
          }
      }
      return results;
  } 
  public static boolean isEmpty(List<String> list) {
    if (list == null || list.size() == 0) {
        return true;
    }
    if (list.size() == 1 && isEmpty(list.get(0))) {
        return true;
    }
    return false;
}
  public static boolean isEmpty(String str) {
      if (str != null && str.trim().length() > 0) {
          return false;
      }
      return true;
  }
}

   
    
    
    
  

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