Pfthb

I am looking to test to see if hundreds of URLs exist, and the current way I have takes too much time. This is what I have found so far:

public static boolean checkURL(URL u)

HttpURLConnection connection = null;
try

 connection = (HttpURLConnection) u.openConnection();
 connection.setRequestMethod("HEAD");
 int code = connection.getResponseCode();
 System.out.println("" + code);
 // You can determine on HTTP return code received. 200 is success.
 if (code == 200)
 
 return true;
 
 else
 
 return false;
 

catch (MalformedURLException e)

 // TODO Auto-generated catch block
 // e.printStackTrace();
 System.out.println("error");

catch (IOException e)

 System.out.println("error2");
 // TODO Auto-generated catch block
 // e.printStackTrace();

finally

 if (connection != null)
 
 connection.disconnect();



return false;

Although this does successfully find whether a URL exists and has content, it does so in a lengthy period of time, with the program often taking upwards of five minutes to execute. Does anyone know more efficient ways to test this?

Note: It is important to test that not only the url returns 200, but also that the website doesn't timeout.

Your code looks good and it should be the easiest way to check for url. You might want to add a timeout in the HttpURLConnection.

Sample code for reference.

enter code here
import java.net.HttpURLConnection;
import java.net.URL;

public class UrlChecker 
public static void main(String args) 
System.out.println(URLExists("http://slowwly.robertomurray.co.uk/delay/
3000/url/http://www.google.co.uk"));


public static boolean URLExists(String targetUrl) 
 HttpURLConnection urlConnection;
 try 
 urlConnection = (HttpURLConnection) new 
 URL(targetUrl).openConnection();
 urlConnection.setRequestMethod("HEAD");
 // Set timeouts 2000 in milliseconds and throw exception
 urlConnection.setConnectTimeout(2000);
 urlConnection.setReadTimeout(2000);
 /* Set timeouts 4000 in milliseconds and it should work as the url 
 should return back in 3 seconds.
 httpUrlConn.setConnectTimeout(4000);
 httpUrlConn.setReadTimeout(4000);
 */
 System.out.println("Response Code =>"+ 
 urlConnection.getResponseCode());
 System.out.println("Response Msg =>"+ 
 urlConnection.getResponseMessage());
 return (urlConnection.getResponseCode() == 
 HttpURLConnection.HTTP_OK);
 catch (Exception e) 
 System.out.println("Exception => " + e.getMessage());
 return false;