Examples of com.google.enterprise.connector.util.UrlValidator.validate()

• com.google.enterprise.connector.util.UrlValidator.validate()
  Attempts to validate the given URL by making an HTTP request. In this case, we're mostly trying to catch typos, so "valid" means:

  1. The URL syntax is valid.
  2. If fully qualified host names are required, check that the host name looks fully qualified (contains a '.').
  3. If the URL uses HTTP or HTTPS:
     1. A connection can be made and the response read.
     2. The response code was not 404, or any of the following related but less common errors: 400, 405, 410, or 414.

  The 405 (Method Not Allowed) is related because the Sun Java System Web Server, and possibly Apache, return this code rather than a 404 if you attempt to access a CGI program in an unknown directory.

  When testing an HTTPS URL, we override server certificate validation to skip trying to verify the server's certificate, and we accept hostname mismatches. In this case, all we care about is that the configured URL can be reached; it's up to the connector administrator to enter the right URL. @param urlString the URL to test @throws GeneralSecurityException if there is an error configuringthe HTTPS connection @throws IOException if the URL is malformed, or if there is anerror connecting or reading the response @throws UrlValidatorException if the HTTP status code was invalid