MultipartResponse.java

package org.h3270.web;

import java.io.*;

import javax.servlet.*;
import javax.servlet.http.*;

/**
 * Taken from Jason Hunter, William Crawford: "Java Servlet Programming", 
 * O'Reilly.
 * 
 * @version $Id: MultipartResponse.java,v 1.1 2003/12/03 08:53:50 spiegel Exp $
 */
public class MultipartResponse {

    HttpServletResponse res;
    ServletOutputStream out;
    boolean endedLastResponse = true;

    public MultipartResponse(HttpServletResponse response) throws IOException {
      // Save the response object and output stream
      res = response;
      out = res.getOutputStream();

      // Set things up
      res.setContentType("multipart/x-mixed-replace;boundary=End");
      out.println();
      out.println("--End");
    }

    public void startResponse(String contentType) throws IOException {
      // End the last response if necessary
      if (!endedLastResponse) {
        endResponse();
      }
      // Start the next one
      out.println("Content-Type: " + contentType);
      out.println();
      endedLastResponse = false;
    }

    public void endResponse() throws IOException {
      // End the last response, and flush so the client sees the content
      out.println();
      out.println("--End");
      out.flush();
      endedLastResponse = true;
    }

    public void finish() throws IOException {
      out.println("--End--");
      out.flush();
    }
}