/*
 * TitleURL : Extract the title of a webpage (URL)
 *     we know have not converged yet.
 *
 * Parke Godfrey
 * 2009 October 27
*/
import java.io.IOException;
import java.io.PrintStream;
import java.util.Scanner;
import java.net.MalformedURLException;
import java.net.URL;

public class TitleURL
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        PrintStream output = System.out;

        // Title is between <title> start-tag and </title> end-tag
        // in the HTML document (webpage).
        final String TITLE_START = "<title>";
        final String TITLE_END = "</title>";
        
        // Ask the user for a URL.
        output.println("Enter a URL:");
        String path = input.nextLine();
            
        // We make an object of type URL to handle our reading of the page.
        URL page = null;
        // Because creating the object might fail (the URL address we
        // provide could fail), the constructor call could throw an
        // exception.  So we must put this in a TRY..CATCH block.
        // This has not been covered yet, but do not be concerned.
        try
        {
            page = new URL("http://" + path);
        } catch (Exception e) {
            output.println("Malformed URL.");
            System.exit(-1); // Exit app if we could not create page.
        }
        
        // Create a scanner to read the webpage.
        Scanner reader = null;
        // The constructor call can again fail, so TRY..CATCH.
        try
        {
            reader = new Scanner(page.openStream());
        } catch (IOException e) {
            output.println("Problem opening the URL.");
            System.exit(-1);
        }
        
        // Find where the title is in the document, if there is one.
        String content = "";
        while (reader.hasNext())
        {
            content += reader.nextLine();
        }
        String lower = content.toLowerCase();
        int start = lower.indexOf(TITLE_START);
        int end   = lower.indexOf(TITLE_END);
        
        if (start >= 0)
        {
            output.println(
                    content.substring(
                            start + TITLE_START.length(),
                            end)
                    );
        } else
        {
            output.println("no title");
        }
    }
}