import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.oreilly.servlet.MultipartRequest;

public class upload extends HttpServlet{
	
	/*AnvŠnder serverns temporŠra katalog vid lagring av filen fšr att kunna skicka tillbaks den till en browser,
	 * anger švre filstorleksgrŠnsen till 5 Mb, lŠser in filen (om den skickats med) till variabeln data och skriver
	 * ut den om den Šr av šnskad content type, annars skriver den ut lite data om den, om ingen fil angavs 
	 * skrivs ett felmeddelande ut
	 */
	public void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException{
		try{
			File dir = (File)getServletContext().getAttribute("javax.servlet.context.tempdir");
			MultipartRequest multi = new MultipartRequest(req, dir.getAbsolutePath(), 5 * 1024 * 1024);
			File f = multi.getFile("file");
			byte[] data = null;
			if (f != null){
				FileInputStream fis = new FileInputStream(f);
				data=new byte[(int) f.length()];
				fis.read(data);
				fis.close();
				if (multi.getContentType("file").equals("image/jpeg") || 
						multi.getContentType("file").equals("image/x-png") ||
						multi.getContentType("file").equals("text/plain")){
					res.setContentType(multi.getContentType("file"));
					OutputStream out = res.getOutputStream();
					out.write(data);
					out.flush();
					out.close();
				}else{
					res.setContentType("text/plain");
					PrintWriter out = res.getWriter();
					out.write(multi.getFilesystemName("file") + "\n");
					out.write(f.length() + " byte\n");
					out.write(multi.getContentType("file"));
				}
			}else{
				res.setContentType("text/plain");
				PrintWriter out = res.getWriter();
				out.write("Warning ange fil!");
			}
		}catch(Exception e){
			log(e.getMessage());
		}
	}
}