httpfile.java

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/*
 * Java Network Programming, Second Edition
 * Merlin Hughes, Michael Shoffner, Derek Hamner
 * Manning Publications Company; ISBN 188477749X
 *
 * http://nitric.com/jnp/
 *
 * Copyright (c) 1997-1999 Merlin Hughes, Michael Shoffner, Derek Hamner;
 * all rights reserved; see license.txt for details.
 */

import java.io.*;

public class HttpFile implements HttpProcessor {
  protected File file;
  
  public HttpFile (HttpInputStream in) throws IOException {
    if (in.getMethod () == HTTP.METHOD_POST)
      throw new HttpException (HTTP.STATUS_NOT_ALLOWED,
                               "<TT>" + in.getMethod () + " " + in.getPath () + "</TT>");
    file = new File (HTTP.HTML_ROOT, HTTP.translateFilename (in.getPath ()));
    if (in.getPath ().endsWith ("/"))
      file = new File (file, HTTP.DEFAULT_INDEX);
    if (!file.exists ())
      throw new HttpException (HTTP.STATUS_NOT_FOUND,
                               "File <TT>" + in.getPath () + "</TT> not found.");
    if (file.isDirectory ())
      throw new RedirectException (HTTP.STATUS_MOVED_PERMANENTLY,
                                   in.getPath () + "/");
    if (!file.isFile () || !file.canRead ())
      throw new HttpException (HTTP.STATUS_FORBIDDEN, in.getPath ());
  }

  public void processRequest (HttpOutputStream out) throws IOException {
    out.setHeader ("Content-type", HTTP.guessMimeType (file.getName ()));
    out.setHeader ("Content-length", String.valueOf (file.length ()));
    if (out.sendHeaders ()) {
      FileInputStream in = new FileInputStream (file);
      out.write (in);
      in.close ();
    }
  }
}