postmessage.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *  not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: PostMessage.java,v 1.1 2003/08/01 17:41:03 gonzo Exp $
 */

package net.jxta.test.http;

import java.net.URL;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;

/**
 *
 * @version $Id: PostMessage.java,v 1.1 2003/08/01 17:41:03 gonzo Exp $
 *
 * @author james todd [gonzo at jxta dot org]
 */

public class PostMessage
    extends GetMessage {

    public PostMessage() {
        this(null, "");
    }

    public PostMessage(URL url) {
        this(url, "");
    }

    public PostMessage(URL url, String message) {
        this(url, ((message != null) ?
                   new Message(message) : new Message()));
    }

    public PostMessage(URL url, Message message) {
        super(url, message);
        super.method = Constants.HTTP.POST;

        if (getHeader(Constants.MIME.Key.CONTENT_TYPE) == null) {
            setContentType(Constants.MIME.Value.XML);
        }
    }

    public void setContentType(String contentType) {
        setHeader(Constants.MIME.Key.CONTENT_TYPE,
                  ((contentType != null) ?
                   contentType : Constants.MIME.Value.XML));
    }

    public String getContentType() {
        return getHeader(Constants.MIME.Key.CONTENT_TYPE);
    }

    public void setBody(String body) {
        super.setBody(body);
    }

    public String getBody() {
        return super.getBody();
    }

    public Message dispatch()
    throws IOException {
        Message response = null;
        URL to = getURL();

        try {
            this.connection = openConnection(to);

            try {
                doGet();
                doPost();
            } catch (IOException ioe) {
                throw new IOException(ioe.getMessage());
            }

            response = getResponse(to);

            closeConnection();
        } catch (NullPointerException npe) {
            if (VERBOSE) {
                npe.printStackTrace();
            }
        }

        // xxx : what about redirecting a post-to-post ... vs post-to-get

        URL from = to;

        to = getLocation(from, response);

        if (to != null) {
            from = to;

            List cookies = new ArrayList();

            for (Iterator h = response.getHeaders(Constants.MIME.Key.COOKIE);
                 h.hasNext(); ) {
                cookies.add((String)h.next());
            }

            for (Iterator h =
                     response.getHeaders(Constants.MIME.Key.SET_COOKIE);
                 h.hasNext(); ) {
                cookies.add((String)h.next());
            }

            response.removeHeaders();

            for (Iterator c = cookies.iterator(); c.hasNext(); ) {
                response.setHeader(Constants.MIME.Key.COOKIE,
                                   (String)c.next());
            }

            setMessage(response);
            setURL(to);

            try {
                response = dispatch(getURL());
            } catch (IOException ioe) {
                if (VERBOSE) {
                    ioe.printStackTrace();
                }
            }
        }

        response = resolveFrames(response, from);

        return response;
    }

    public String toString() {
        java.lang.Class clazz = getClass();
        java.lang.reflect.Field[] fields = clazz.getDeclaredFields();
        java.util.HashMap map = new java.util.HashMap();
        java.lang.String object = null;
        java.lang.Object value = null;

        for (int i = 0; i < fields.length; i++) {
            try {
                object = fields[i].getName();
                value = fields[i].get(this);

                map.put(object, (value != null) ? value : "null");
            } catch (IllegalAccessException iae) {
                iae.printStackTrace();
            }
        }

        if (clazz.getSuperclass().getSuperclass() != null) {
            map.put("super", clazz.getSuperclass().toString());
        }

        return clazz.getName() + map;
    }

    protected void doPost()
    throws IOException {
        final int BLOCK = 4 * 1024;

        if (super.method == Constants.HTTP.POST &&
            super.message != null &&
            super.message.hasBody()) {
            char[] message = super.message.getBody().toCharArray();
            OutputStreamWriter osw =
                new OutputStreamWriter(this.connection.getOutputStream());
            BufferedWriter writer = new BufferedWriter(osw);
            int l = BLOCK;
            int c = 0;
            int m = message.length;

            while ((c * BLOCK) < m) {
                if (((c + 1) * BLOCK) > m) {
                    l = m - c * BLOCK;
                }

                writer.write(message, c++ * BLOCK, l);
            }

            writer.flush();
            writer.close();
        }
    }
}