import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.cxf.common.util.Base64Utility;

public class PDF_Alchemy_Status {
  private static final String ACCESS_KEY_ID="xxxxxxxxxxxxxxxxxxxx";
  private static final String SECRET_ACCESS_KEY="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
  private static final String HMAC_SHA1="HMACSHA1";

  public static void main(String[] args) {
    try {
      // Generate the HMAC-SHA1 signature.
      SimpleDateFormat dateFormat=new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'");
      dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
      String date=dateFormat.format(new Date());
      String request='/'+ACCESS_KEY_ID+"/status";
      String clearText="GET\n"+ACCESS_KEY_ID+'\n'+date+'\n'+request;
      Mac mac = Mac.getInstance(HMAC_SHA1);
      mac.init(new SecretKeySpec(SECRET_ACCESS_KEY.getBytes(),HMAC_SHA1));
      String signature=Base64Utility.encode(mac.doFinal(clearText.getBytes()));

      // Request the status from PDF Alchemy.
      URLConnection conn=(new URL("http://www.pdfalchemy.com"+request)).openConnection();
      conn.setRequestProperty("date",date);
      conn.setRequestProperty("X-PDF-Alchemy-Signature",signature);
      BufferedReader reader=new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String line;
      while ((line=reader.readLine())!=null)
        System.out.println(line);
      reader.close();
    } catch (Exception e) {
      System.out.println(e.toString());
    }
  }

}