package info.ejava.examples.secureping.client;
   
   import java.io.IOException;
   import java.util.Base64;
   
   import javax.ws.rs.client.ClientRequestContext;
   import javax.ws.rs.client.ClientRequestFilter;
   import javax.ws.rs.core.MultivaluedMap;
   
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class BasicAuthnFilter implements ClientRequestFilter {
      private static final Logger logger = LoggerFactory.getLogger(BasicAuthnFilter.class);
      private final String username;
      private final String password;
      private final String authn;
      
      public BasicAuthnFilter(String username, String password) {
          this.username = username;
          this.password = password;
          String credentials = username + ":" + password;
          authn = "Basic " + Base64.getEncoder().encodeToString(credentials.getBytes());
      }
  
      @Override
      public void filter(ClientRequestContext requestContext) throws IOException {
          MultivaluedMap<String, Object> headers = requestContext.getHeaders();
          headers.add("Authorization", authn);
          logger.debug("added BASIC credentials[{}] for {}, {}", authn, username, password);
      }
  }