hmuxresponse.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 147 行

/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.server.hmux;

import com.caucho.server.connection.AbstractHttpRequest;
import com.caucho.server.connection.AbstractHttpResponse;
import com.caucho.server.util.CauchoSystem;
import com.caucho.util.Alarm;
import com.caucho.util.CharBuffer;
import com.caucho.vfs.WriteStream;

import javax.servlet.http.Cookie;
import java.io.IOException;

/**
 * Handles a response for a srun connection, i.e. a connection to
 * a web server plugin.
 */
public class HmuxResponse extends AbstractHttpResponse {
  HmuxRequest _req;
  
  HmuxResponse(HmuxRequest request)
  {
    super(request);
    
    _req = request;
  }

  /**
   * Return true for the top request.
   */
  public boolean isTop()
  {
    if (! (_request instanceof AbstractHttpRequest))
      return false;
    else {
      return ((AbstractHttpRequest) _request).isTop();
    }
  }
  
  protected boolean writeHeadersInt(WriteStream os,
				    int length,
				    boolean isHead)
    throws IOException
  {
    CharBuffer cb = _cb;
    cb.clear();
    cb.append((char) ((_statusCode / 100) % 10 + '0'));
    cb.append((char) ((_statusCode / 10) % 10 + '0'));
    cb.append((char) (_statusCode % 10 + '0'));
    cb.append(' ');
    cb.append(_statusMessage);

    _req.writeStatus(cb);

    if (_statusCode >= 400) {
      removeHeader("ETag");
      removeHeader("Last-Modified");
    }
    else if (_isNoCache) {
      removeHeader("ETag");
      removeHeader("Last-Modified");

      setHeader("Expires", "Thu, 01 Dec 1994 16:00:00 GMT");
      _req.writeHeader("Cache-Control", "no-cache");
    }
    else if (isPrivateCache())
      _req.writeHeader("Cache-Control", "private");

    int load = (int) (1000 * CauchoSystem.getLoadAvg());
    _req.writeString(HmuxRequest.HMUX_META_HEADER, "cpu-load");
    _req.writeString(HmuxRequest.HMUX_STRING, String.valueOf(load));

    int size = _headerKeys.size();
    for (int i = 0; i < size; i++) {
      String key = (String) _headerKeys.get(i);
      String value = (String) _headerValues.get(i);

      _req.writeHeader(key, value);
    }

    if (_contentLength >= 0) {
      cb.clear();
      cb.append(_contentLength);
      _req.writeHeader("Content-Length", cb);
    }
    else if (length >= 0) {
      cb.clear();
      cb.append(length);
      _req.writeHeader("Content-Length", cb);
    }

    long now = Alarm.getCurrentTime();
    size = _cookiesOut.size();
    for (int i = 0; i < size; i++) {
      Cookie cookie = (Cookie) _cookiesOut.get(i);
      int cookieVersion = cookie.getVersion();

      fillCookie(cb, cookie, now, 0, false);
      _req.writeHeader("Set-Cookie", cb);
      if (cookieVersion > 0) {
        fillCookie(cb, cookie, now, cookieVersion, true);
        _req.writeHeader("Set-Cookie2", cb);
      }
    }

    if (_contentType != null) {
      if (_charEncoding != null)
	_req.writeHeader("Content-Type", _contentType + "; charset=" + _charEncoding);
      else
	_req.writeHeader("Content-Type", _contentType);
      
    }

    _req.sendHeader();

    return false;
  }
}