HomeWork 12 Task 1

CheckURLList.java

package HomeWork12;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class CheckURLList {

	public static void main(String[] args) throws IOException {
		String file = "/Users/at/eclipse-workspace/oop/HomeWork12/urllist.txt";
		List<String> list = getListFromFileStream(file);
		list.forEach(System.out::println);
		checkURLlist(list);

	}

	public static List<String> getListFromFileStream(String file) {
		List<String> listStream = new ArrayList<>();
		try (Stream<String> stream = Files.lines(Paths.get(file))) {
			listStream = stream.collect(Collectors.toList());

		} catch (IOException e) {
			e.printStackTrace();
		}
		return listStream;

	}

	public static void checkURLlist(List<String> list) throws IOException {
		for (String url : list) {
			if (checkURL(url)) {
				System.out.format("%s - site is now available %n", url);
			} else {
				String tmpurl = url.replace("http", "https");
				if (checkURL(tmpurl)) {
					System.out.format("%s - site is now available %n", tmpurl);
				} else {
					System.out.format("%s - site is currently unavailable %n", url);
				}
			}
		}
	}

	public static boolean checkURL(String url) throws IOException {
		boolean result = true;
		HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
		connection.setRequestMethod("HEAD");
		connection.setConnectTimeout(10000);
		int responseCode = connection.getResponseCode();
		if (responseCode != 200) {
			result = false;
		}
		return result;
	}

}