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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.bck2brwsr.dew;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.Writer;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.util.Arrays;
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import java.util.Enumeration;
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import java.util.LinkedHashSet;
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import java.util.Set;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.apidesign.vm4brwsr.Bck2Brwsr;
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import org.glassfish.grizzly.PortRange;
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import org.glassfish.grizzly.http.server.HttpHandler;
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import org.glassfish.grizzly.http.server.HttpServer;
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import org.glassfish.grizzly.http.server.NetworkListener;
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import org.glassfish.grizzly.http.server.Request;
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import org.glassfish.grizzly.http.server.Response;
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import org.glassfish.grizzly.http.server.ServerConfiguration;
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/**
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* Lightweight server to launch dew - the Development Environment for Web.
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*/
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final class DewLauncher {
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private static final Logger LOG = Logger.getLogger(DewLauncher.class.getName());
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private Set<ClassLoader> loaders = new LinkedHashSet<>();
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private Set<Bck2Brwsr.Resources> xRes = new LinkedHashSet<>();
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private final Res resources = new Res();
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private final String cmd;
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public DewLauncher(String cmd) {
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this.cmd = cmd;
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}
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public void addClassLoader(ClassLoader url) {
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this.loaders.add(url);
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}
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final HttpServer initServer(Bck2Brwsr.Resources... extraResources) throws IOException {
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xRes.addAll(Arrays.asList(extraResources));
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HttpServer s = HttpServer.createSimpleServer(".", new PortRange(8080, 65535));
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final ServerConfiguration conf = s.getServerConfiguration();
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conf.addHttpHandler(new VM(resources), "/bck2brwsr.js");
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conf.addHttpHandler(new VMInit(), "/vm.js");
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conf.addHttpHandler(new Classes(resources), "/classes/");
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return s;
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}
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final Object[] launchServerAndBrwsr(HttpServer server, final String page) throws IOException, URISyntaxException, InterruptedException {
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server.start();
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NetworkListener listener = server.getListeners().iterator().next();
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int port = listener.getPort();
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URI uri = new URI("http://localhost:" + port + page);
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LOG.log(Level.INFO, "Showing {0}", uri);
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if (cmd == null) {
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try {
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LOG.log(Level.INFO, "Trying Desktop.browse on {0} {2} by {1}", new Object[] {
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System.getProperty("java.vm.name"),
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System.getProperty("java.vm.vendor"),
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System.getProperty("java.vm.version"),
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});
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java.awt.Desktop.getDesktop().browse(uri);
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LOG.log(Level.INFO, "Desktop.browse successfully finished");
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return null;
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} catch (UnsupportedOperationException ex) {
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LOG.log(Level.INFO, "Desktop.browse not supported: {0}", ex.getMessage());
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LOG.log(Level.FINE, null, ex);
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}
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}
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{
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String cmdName = cmd == null ? "xdg-open" : cmd;
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String[] cmdArr = {
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cmdName, uri.toString()
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};
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LOG.log(Level.INFO, "Launching {0}", Arrays.toString(cmdArr));
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final Process process = Runtime.getRuntime().exec(cmdArr);
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return new Object[] { process, null };
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}
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}
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private class Res implements Bck2Brwsr.Resources {
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@Override
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public InputStream get(String resource) throws IOException {
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for (ClassLoader l : loaders) {
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URL u = null;
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Enumeration<URL> en = l.getResources(resource);
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while (en.hasMoreElements()) {
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u = en.nextElement();
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}
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if (u != null) {
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return u.openStream();
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}
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}
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for (Bck2Brwsr.Resources r : xRes) {
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InputStream is = r.get(resource);
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if (is != null) {
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return is;
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}
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}
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throw new IOException("Can't find " + resource);
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}
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}
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private static class VM extends HttpHandler {
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private final String bck2brwsr;
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public VM(Res loader) throws IOException {
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StringBuilder sb = new StringBuilder();
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Bck2Brwsr.generate(sb, loader);
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this.bck2brwsr = sb.toString();
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}
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@Override
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public void service(Request request, Response response) throws Exception {
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response.setCharacterEncoding("UTF-8");
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response.setContentType("text/javascript");
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response.getWriter().write(bck2brwsr);
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}
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}
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private static class VMInit extends HttpHandler {
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public VMInit() {
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}
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@Override
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public void service(Request request, Response response) throws Exception {
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response.setCharacterEncoding("UTF-8");
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response.setContentType("text/javascript");
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response.getWriter().append(
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"function ldCls(res) {\n"
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+ " var request = new XMLHttpRequest();\n"
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+ " request.open('GET', '/classes/' + res, false);\n"
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+ " request.send();\n"
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+ " var arr = eval('(' + request.responseText + ')');\n"
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+ " return arr;\n"
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+ "}\n"
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+ "var vm = new bck2brwsr(ldCls);\n");
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}
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}
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private static class Classes extends HttpHandler {
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private final Res loader;
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public Classes(Res loader) {
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this.loader = loader;
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}
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@Override
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public void service(Request request, Response response) throws Exception {
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String res = request.getHttpHandlerPath();
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if (res.startsWith("/")) {
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res = res.substring(1);
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}
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try (InputStream is = loader.get(res)) {
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response.setContentType("text/javascript");
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Writer w = response.getWriter();
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w.append("[");
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for (int i = 0;; i++) {
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int b = is.read();
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if (b == -1) {
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break;
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}
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if (i > 0) {
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w.append(", ");
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}
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if (i % 20 == 0) {
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w.write("\n");
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}
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if (b > 127) {
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b = b - 256;
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}
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w.append(Integer.toString(b));
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}
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w.append("\n]");
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} catch (IOException ex) {
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response.setError();
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response.setDetailMessage(ex.getMessage());
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}
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}
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}
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}
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