package us.codecraft.webmagic.utils;
   
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   import us.codecraft.webmagic.proxy.Proxy;
   
   import java.io.IOException;
   import java.net.InetSocketAddress;
   import java.net.Socket;
  
  /**
   * Pooled Proxy Object
   * 
   * @author yxssfxwzy@sina.com <br>
   * @since 0.5.1
   */
  
  public class ProxyUtils {
  
  	private static final Logger logger = LoggerFactory.getLogger(ProxyUtils.class);
  
  	public static boolean validateProxy(Proxy p) {
  		Socket socket = null;
  		try {
  			socket = new Socket();
  			InetSocketAddress endpointSocketAddr = new InetSocketAddress(p.getHost(), p.getPort());
  			socket.connect(endpointSocketAddr, 3000);
  			return true;
  		} catch (IOException e) {
  			logger.warn("FAILRE - CAN not connect!  remote: " + p);
  			return false;
  		} finally {
  			if (socket != null) {
  				try {
  					socket.close();
  				} catch (IOException e) {
  					logger.warn("Error occurred while closing socket of validating proxy", e);
  				}
  			}
  		}
  
  	}
  
  }