001/*
002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.webengine.servlet;
023
024import java.io.IOException;
025import java.io.InputStream;
026import java.io.OutputStream;
027
028import javax.servlet.ServletException;
029import javax.servlet.http.HttpServlet;
030import javax.servlet.http.HttpServletRequest;
031import javax.servlet.http.HttpServletResponse;
032
033import org.apache.commons.io.IOUtils;
034import org.apache.commons.logging.Log;
035import org.apache.commons.logging.LogFactory;
036import org.nuxeo.ecm.webengine.WebEngine;
037import org.nuxeo.ecm.webengine.model.Module;
038import org.nuxeo.ecm.webengine.model.WebContext;
039import org.nuxeo.ecm.webengine.scripting.ScriptFile;
040import org.nuxeo.runtime.api.Framework;
041
042/**
043 * Servlet for accessing common file resources
044 *
045 * @author <a href="mailto:[email protected]">Stefanescu Bogdan</a>
046 */
047public class ResourceServlet extends HttpServlet {
048
049    protected static final Log log = LogFactory.getLog(ResourceServlet.class);
050
051    private static final long serialVersionUID = 6548084847887645044L;
052
053    @Override
054    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
055        WebEngine engine = Framework.getService(WebEngine.class);
056        String path = req.getPathInfo();
057        if (path == null) {
058            resp.sendError(404);
059            return;
060        }
061        int p = path.indexOf('/', 1);
062        String moduleName = null;
063        if (p > -1) {
064            moduleName = path.substring(1, p);
065            path = path.substring(p);
066        } else {
067            resp.sendError(404);
068            return;
069        }
070
071        Module module = engine.getModule(moduleName, (WebContext)req.getAttribute(WebContext.class.getName()));
072        if (module == null) {
073            resp.sendError(404);
074            return;
075        }
076
077        try {
078            service(req, resp, module, "/resources" + path);
079        } catch (IOException e) {
080            log.error("Unable to serve resource for " + path, e);
081            resp.sendError(404);
082        }
083    }
084
085    protected void service(HttpServletRequest req, HttpServletResponse resp, Module module, String path)
086            throws IOException {
087
088        ScriptFile file = module.getSkinResource(path);
089        if (file != null) {
090            long lastModified = file.lastModified();
091            resp.setDateHeader("Last-Modified", lastModified);
092            resp.addHeader("Cache-Control", "public");
093            resp.addHeader("Server", "Nuxeo/WebEngine-1.0");
094
095            WebEngine engine = Framework.getService(WebEngine.class);
096            String mimeType = engine.getMimeType(file.getExtension());
097            if (mimeType == null) {
098                mimeType = "text/plain";
099            }
100            resp.setContentType(mimeType);
101            if (mimeType.startsWith("text/")) {
102                sendTextContent(file, resp);
103            } else {
104                sendBinaryContent(file, resp);
105            }
106            return;
107        }
108        resp.sendError(404);
109    }
110
111    protected static void sendBinaryContent(ScriptFile file, HttpServletResponse resp) throws IOException {
112        OutputStream out = resp.getOutputStream();
113        try (InputStream in = file.getInputStream()) {
114            IOUtils.copy(in, out);
115            out.flush();
116        }
117    }
118
119    protected static void sendTextContent(ScriptFile file, HttpServletResponse resp) throws IOException {
120        // Writer out = resp.getWriter();
121        OutputStream out = resp.getOutputStream();
122        try (InputStream in = file.getInputStream()) {
123            IOUtils.copy(in, out);
124            out.flush();
125        }
126    }
127
128}