httppostpetstoreproxy.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * Copyright 2002 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:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution 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.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
 * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of
 * any nuclear facility.
 */
package com.sun.j2ee.blueprints.admin.client;

import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.net.URL;
import java.net.MalformedURLException;
import java.net.HttpURLConnection;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.InputStreamReader;
import java.io.DataOutputStream;
import java.io.BufferedReader;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.NamedNodeMap;
import org.xml.sax.InputSource;

public class HttpPostPetStoreProxy implements PetStoreProxy {

    private static final String requestType =
        "<?xml version=\"1.0\" encoding=\"ISO-8859-1\" standalone=\"yes\"?>\n";

    private URL url = null;
    private DocumentBuilder documentBuilder = null;
    private DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");

    public HttpPostPetStoreProxy() {
    }

    public void setup(String host, String port, String sessionID) {
        // TBD assert host, port
        try {
            url = new URL("http://" + host + ":" + port
                + "/admin/ApplRequestProcessor;jsessionid=" + sessionID);
        } catch(MalformedURLException e) {
            e.printStackTrace();
            // TBD deal with exception - rethrow to main()
        }

        try {
            documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        } catch (Exception e) {
            e.printStackTrace();
            // TBD deal with exception - rethrow to main()
        }
    }

    private Document doHttpPost(String request) {
        InputStream ist = null;
        OutputStream ost = null;
        HttpURLConnection uc = null;

        try {
            /* Initialize the HttpURLConnection */

            uc = (HttpURLConnection)(url.openConnection());
            uc.setRequestMethod("POST");
            uc.setDoOutput(true);
            uc.setUseCaches(false);
            uc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            uc.setRequestProperty("JSESSIONID", "HAHAHAHA");
            uc.connect();

            /* Send the post request */

            ost = uc.getOutputStream();
            DataOutputStream out = new DataOutputStream(ost);
            out.writeBytes(request);
            out.flush();
            out.close();
            ost = null;

            /* Read and print the response */

            ist = uc.getInputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(ist));
            StringBuffer sb = new StringBuffer();
            char[] c = new char[1];
            while (in.read(c, 0, 1) == 1) {
                sb.append(c[0]);
            }

            InputSource src = new InputSource(new StringReader(sb.toString()));
            return documentBuilder.parse(src);
        } catch (Exception e) {
            if (uc != null) {
                uc.disconnect();
            }
            return null;
        } finally { // Carefully close the input and output streams
            if (ost != null) {
                try {
                    ost.close();
                }
                catch (IOException ignore) {
                }
            }
            if (ist != null) {
                try {
                    ist.close();
                }
                catch (IOException ignore) {
                }
            }
        }
    }

    private String genRequest(StringBuffer body) {
        StringBuffer sb = new StringBuffer(requestType);
        sb.append("<Request>\n");
        sb.append(body.toString());
        sb.append("</Request>\n");
        return sb.toString();
    }

    /**
     * Return the value of the first child of this node.  For example, given
     * a node like "<foo>bar</foo>", return "bar".
     */
    private String getBody(Node node) {
        try {
            return node.getFirstChild().getNodeValue();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }


    /**
     * Return the body of the first element with the specified tag.  We
     * assume that the element has one text node child.  If anything goes
     * wrong, return null.
     */
    private String getBody(Document doc, String tag) {
        return getBody(doc.getElementsByTagName(tag).item(0));
    }


    /**
     * Return the date value of the first child of this node.  See the Document
     * overload of this method for more information.
     */
    private Date getDate(Node node) {
        try {
            String s = getBody(node);
            return dateFormat.parse(s, new ParsePosition(0));
        }
        catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * Return the Date value of the first element with the specified tag.
     * The body of the element is assumed to be a date in the ISO 8601 format
     * used by the ICalendar server.  For example: "20010331T000000Z", is interpreted
     * as "Fri Mar 30 16:00:00 PST 2001".  Note that the calendar start/end
     * dates are assumed to be in the GMT time zone.
     */
    private Date getDate(Document doc, String tag) {
        return getDate(doc.getElementsByTagName(tag).item(0));
    }


    /**
     * Return the integer value of the first child of this node.
     */
    private int getInt(Node node) {
        try {
            String s = getBody(node);
            return Integer.parseInt(s);
        }
        catch (Exception e) {
            e.printStackTrace();
            return -1;
        }
    }

    /**
     * Return the float value of the first child of this node.
     */
    private float getFloat(Node node) {
        String s = null;
        try {
            s = getBody(node);
            return Float.parseFloat(s);
        }