Re: Save gif file from the URL

mark wrote:


Try this;

import java.net.*;
import java.io.*;

public class saveBinaryFile
{
    public static void main (String args[])
    {
       try
       {
          URL root = new URL(args[0]);
          saveBinaryFile(root);
       }
       catch (MalformedURLException e)
       {
          System.err.println(args[0] + " is not a URL I understand.");
       }
    }

    public static void saveBinaryFile(URL u)
    {
       int bfr = 1;
       try
       {
          URLConnection uc = u .openConnection();
          String ct = uc.getContentType();
          int cl = uc.getContentLength();

          if (ct.startsWith("text/") || cl == -1 )
          {
             System.err.println("This is not a binary file.");
             return;
          }

          InputStream theImage = uc.getInputStream();
          byte[] b = new byte[cl];
          int bytesread = 0;
          int offset = 0;

          while (bytesread >= 0)
          {
             bytesread = theImage.read(b, offset, bfr);
             if (bytesread == -1) break;
             offset += bytesread;
          }
          if (offset != cl)
          {
             System.err.println("Error: Only read " + offset + " bytes");
             System.err.println("Expected " + cl + " bytes");
          }
          String theFile = u.getFile();
          theFile =
theFile.substring(theFile.lastIndexOf('/') + 1);

          FileOutputStream fout = new FileOutputStream(theFile);
          fout.write(b);
       }
       catch (Exception e)
       {
          System.err.println(e);
       }
       return;
    }
}

1. Compile the above.

2. On windows box make a anyname.bat file and paste the following.

REM *** Test of Google logo d/l ***
java saveBinaryFile "http://www.google.com/intl/us_ALL/images/logo.gif"
pause

3. Put both in the same directory.
4. Double click on the bat file.

The image file should be saved in the same directory as the compiled class