Add Default Port to a URL If Missing
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* 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
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*/
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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