launcher/http/src/main/java/org/apidesign/bck2brwsr/launcher/Bck2BrwsrLauncher.java
2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.launcher;
21 import java.io.FileReader;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.InputStreamReader;
25 import java.io.Reader;
26 import java.net.MalformedURLException;
28 import java.util.logging.Level;
29 import org.apidesign.vm4brwsr.Bck2Brwsr;
32 * Lightweight server to launch Bck2Brwsr applications and tests.
33 * Supports execution in native browser as well as Java's internal
36 final class Bck2BrwsrLauncher extends BaseHTTPLauncher {
38 public Bck2BrwsrLauncher(String cmd) {
43 String harnessResource() {
44 return "org/apidesign/bck2brwsr/launcher/harness.xhtml";
48 void generateBck2BrwsrJS(StringBuilder sb, final Res loader) throws IOException {
49 class R implements Bck2Brwsr.Resources {
51 public InputStream get(String resource) throws IOException {
52 return loader.get(resource, 0);
55 String b2b = System.getProperty("bck2brwsr.js");
57 LOG.log(Level.INFO, "Serving bck2brwsr.js from {0}", b2b);
61 } catch (MalformedURLException ex) {
62 File f = new File(b2b);
64 bu = f.toURI().toURL();
69 try (Reader r = new InputStreamReader(bu.openStream())) {
70 char[] arr = new char[4096];
72 int len = r.read(arr);
76 sb.append(arr, 0, len);
80 LOG.log(Level.INFO, "Generating bck2brwsr.js from scratch", b2b);
81 Bck2Brwsr.generate(sb, new R());
84 "(function WrapperVM(global) {\n"
85 + " var cache = {};\n"
86 + " function ldCls(res, skip) {\n"
87 + " var c = cache[res];\n"
89 + " if (c[skip]) return c[skip];\n"
90 + " if (c[skip] === null) return null;\n"
92 + " cache[res] = c = new Array();\n"
94 + " var request = new XMLHttpRequest();\n"
95 + " request.open('GET', '/classes/' + res + '?skip=' + skip, false);\n"
96 + " request.send();\n"
97 + " if (request.status !== 200) {\n"
98 + " c[skip] = null;\n"
101 + " var arr = eval('(' + request.responseText + ')');\n"
102 + " c[skip] = arr;\n"
105 + " var prevvm = global.bck2brwsr;\n"
106 + " global.bck2brwsr = function() {\n"
107 + " var args = Array.prototype.slice.apply(arguments);\n"
108 + " args.unshift(ldCls);\n"
109 + " return prevvm.apply(null, args);\n"
113 LOG.log(Level.INFO, "Serving bck2brwsr.js", b2b);