org.jbpm.designer.server.EngineProxy.java Source code

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Here is the source code for org.jbpm.designer.server.EngineProxy.java

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/*
 * Copyright 2015 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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.jbpm.designer.server;

import java.io.DataInputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.codec.binary.Base64;

public class EngineProxy extends HttpServlet {
    private static final long serialVersionUID = -596209118625017987L;
    private static Configuration config = null;

    public void doGet(HttpServletRequest req, HttpServletResponse resp) {
        try {
            String engineURL = req.getParameter("url");

            String user = req.getHeader("Authorization");
            if (user != null) {
                java.util.StringTokenizer st = new java.util.StringTokenizer(user);
                if (st.hasMoreTokens()) {
                    if (st.nextToken().equalsIgnoreCase("Basic")) {
                        String userPass = new String(Base64.decodeBase64(st.nextToken()));
                        user = userPass.split(":")[0];
                    }
                }
            }

            if (user == null) {
                resp.setHeader("WWW-Authenticate", "BASIC realm=\"Please type in your username here\"");
                resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
                return;
            }

            URL url_engine = new URL(engineURL);
            HttpURLConnection connection_engine = (HttpURLConnection) url_engine.openConnection();
            connection_engine.setRequestMethod("GET");
            String encoding = Base64.encodeBase64String((user + ":").getBytes());
            connection_engine.setRequestProperty("Authorization", "Basic " + encoding);
            connection_engine.setDoInput(true);

            connection_engine.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            connection_engine.setRequestProperty("Accept",
                    "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");

            connection_engine.connect();

            if (connection_engine.getResponseCode() == 200) {
                DataInputStream in = new DataInputStream(connection_engine.getInputStream());
                String str;
                String xmlDoc = "";
                while ((str = in.readLine()) != null) {
                    xmlDoc += str + " ";
                }
                /*
                            xmlDoc = xmlDoc.replaceAll("href=\"/", "href=\"/oryx/engineproxy?url="+url_engine.getProtocol()+"://"+url_engine.getHost()+":"+url_engine.getPort()+"/");
                            xmlDoc = xmlDoc.replaceAll("src=\"/", "src=\"/oryx/engineproxy?url="+url_engine.getProtocol()+"://"+url_engine.getHost()+":"+url_engine.getPort()+"/");
                            xmlDoc = xmlDoc.replaceAll("action=\"/", "action=\"/oryx/engineproxy?url="+url_engine.getProtocol()+"://"+url_engine.getHost()+":"+url_engine.getPort()+"/");
                */
                PrintWriter out = resp.getWriter();

                out.print(xmlDoc);

            }
        } catch (Exception e1) {
            e1.printStackTrace();
        }
    }
}