How to validate WSDL URL is up and running or not from Java?

Question

I wanted to check WSDL url is valid or not from Java code. So that I can use another url based on that.

So I am checking the code like this.

private boolean isValidWsdlURL(String wsdlUrl) 
{
    UrlValidator urlValidator = new UrlValidator();
    if(urlValidator.isValid(wsdlUrl)) 
    {
        return true;
    }
    logger.info("WSDL URL is not valid...");
    return false;
}

But its alwys returning false though I have valid URL. WSDL URL Ex: http://www.sample.com/MyWsdlService?wsdl

Because URL ends with ?wsdl How to check the code? Looks we need only "http://www.sample.com" for UrlValidator to pass.

Solution 1

You're trying to validate a WSDL URL? Why not use the java.net.URL class ?
And do something like:

String urlStr = "http://www.example.com/helloService?wsdl";
URL url = null;
try {
  url = new URL(urlStr);
  URLConnection urlConnection = url.openConnection()
} catch (MalformedURLException ex) {
   System.out.println("bad URL");
} catch (IOException ex) {
   System.out.println("Failed opening connection. Perhaps WS is not up?");
}

When I inserted bad URLs like htt2p instead of http I got - "bad url" print

Solution 2

Try this.. Its working for me now. Thanks @zaske

public class TestWSDL {

public static void main(String args[]) {
    String urlStr = "http://www.example.com:8080/helloService?wsdl";
    URL url = null;
    URLConnection urlConnection = null;
    try {
      url = new URL(urlStr);
      urlConnection = url.openConnection();
      if(urlConnection.getContent() != null) {
          System.out.println("GOOD URL");
      } else {
          System.out.println("BAD URL");
      }
    } catch (MalformedURLException ex) {
       System.out.println("bad URL");
    } catch (IOException ex) {
       System.out.println("Failed opening connection. Perhaps WS is not up?");
    } 
}

}

Comments

[Sriks]

This is NOT working... I have GOOD ONE --example:8080/helloService?wsdl BAD ONE -- example:8081/helloService?wsdl . But from above code both URLs are returns as Good Url. I wanted to check the Service is up or not instead of just URL syntax

[Yair Zaslavsky]

@Sriks - this was not understood from your question. Now I Understand. You can open a URL connection.

[Yair Zaslavsky]

@Sriks - I modified my answer.

[Sriks]

Thanks for your suggestion. I just tried with valid and invalid url with different ports. And its still returning as GOOD URL.

[Sriks]

your suggestion gave me an idea to check with getContent() method call and try to solve the URL issue. Pls check below answer

[user1428716]

Why to check getContent() ? .. cant we do with getResponseCode() ?