HttpOutputStream.java

/* 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
package org.apache.felix.mosgi.jmx.httpconnector.mx4j.tools.adaptor.http;

import java.io.BufferedOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;

/**
 * HttpAdaptor sets the basic adaptor listening for HTTP requests
 *
 * @author <a href="mailto:tibu@users.sourceforge.net">Carlos Quiroz</a>
 * @version $Revision: 1.1.1.1 $
 */
public class HttpOutputStream extends BufferedOutputStream
{
  /** Answer code */
  protected int code;
  /** whether to send the headers*/
  protected boolean sendHeaders;
  /** Headers to be sent */
  protected Map headers = new HashMap(7);
  /**
   * Creates a new HttpOutputStream with a given OutputStream and an InputStream
   *
   * @param out  The OutputStream normally associated with the output socket
   *      stream of the incoming connection
   * @param in   HttpInputStream containing the incoming request
   */
  public HttpOutputStream(OutputStream out, HttpInputStream in)
  {
    super(out);
    code = HttpConstants.STATUS_OKAY;
    setHeader("Server", HttpConstants.SERVER_INFO);
    sendHeaders = (in.getVersion() >= 1.0);
  }
  /**
   * Sets the answer code
   *
   * @param code  The new code value
   */
  public void setCode(int code)
  {
    this.code = code;
  }
  /**
   * Sets a given header code
   *
   * @param attr   The new header name
   * @param value  The new header value
   */
  public void setHeader(String attr, String value)
  {
    headers.put(attr, value);
  }
  /**
   * Sends the headers
   *
   * @return                 Description of the Returned Value
   * @exception IOException  Description of Exception
   */
  public boolean sendHeaders() throws IOException
  {
    if (sendHeaders)
    {
      StringBuffer buffer = new StringBuffer(512);
      buffer.append(HttpConstants.HTTP_VERSION);
      buffer.append(code);
      buffer.append(" ");
      buffer.append(HttpUtil.getCodeMessage(code));
      buffer.append("\r\n");
      Iterator attrs = headers.keySet().iterator();
      int size = headers.size();
      for (int i = 0; i < size; i++)
      {
        String attr = (String) attrs.next();
        buffer.append(attr);
        buffer.append(": ");
        buffer.append(headers.get(attr));
        buffer.append("\r\n");
      }
      buffer.append("\r\n");
      write(buffer.toString());
    }
    return sendHeaders;
  }
  /**
   * Writes a given message line
   *
   * @param msg The message to be written
   * @exception IOException
   */
  public void write(String msg) throws IOException
  {
    write(msg.getBytes("latin1"));
  }
  /**
   * Writes the content of the input stream to the output stream
   *
   * @param in The input stream
   * @exception IOException
   */
  public void write(InputStream in) throws IOException
  {
    int n;
    int length = buf.length;
    while ((n = in.read(buf, count, length - count)) >= 0)
    {
      if ((count += n) >= length)
      {
        out.write(buf, count = 0, length);
      }
    }
  }
}