Thu, 31 Aug 2017 15:30:47 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package jdk.nashorn.internal.runtime; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; |
aoqi@0 | 29 | import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; |
aoqi@0 | 30 | import static jdk.nashorn.internal.lookup.Lookup.MH; |
aoqi@0 | 31 | |
aoqi@0 | 32 | import java.io.BufferedReader; |
aoqi@0 | 33 | import java.io.File; |
aoqi@0 | 34 | import java.io.IOException; |
aoqi@0 | 35 | import java.io.InputStreamReader; |
aoqi@0 | 36 | import java.io.OutputStreamWriter; |
aoqi@0 | 37 | import java.lang.invoke.MethodHandle; |
aoqi@0 | 38 | import java.lang.invoke.MethodHandles; |
aoqi@0 | 39 | import java.util.Map; |
aoqi@0 | 40 | import java.util.StringTokenizer; |
aoqi@0 | 41 | |
aoqi@0 | 42 | /** |
aoqi@0 | 43 | * Global functions supported only in scripting mode. |
aoqi@0 | 44 | */ |
aoqi@0 | 45 | public final class ScriptingFunctions { |
aoqi@0 | 46 | |
aoqi@0 | 47 | /** Handle to implementation of {@link ScriptingFunctions#readLine} - Nashorn extension */ |
aoqi@0 | 48 | public static final MethodHandle READLINE = findOwnMH("readLine", Object.class, Object.class, Object.class); |
aoqi@0 | 49 | |
aoqi@0 | 50 | /** Handle to implementation of {@link ScriptingFunctions#readFully} - Nashorn extension */ |
aoqi@0 | 51 | public static final MethodHandle READFULLY = findOwnMH("readFully", Object.class, Object.class, Object.class); |
aoqi@0 | 52 | |
aoqi@0 | 53 | /** Handle to implementation of {@link ScriptingFunctions#exec} - Nashorn extension */ |
aoqi@0 | 54 | public static final MethodHandle EXEC = findOwnMH("exec", Object.class, Object.class, Object.class, Object.class); |
aoqi@0 | 55 | |
aoqi@0 | 56 | /** EXEC name - special property used by $EXEC API. */ |
aoqi@0 | 57 | public static final String EXEC_NAME = "$EXEC"; |
aoqi@0 | 58 | |
aoqi@0 | 59 | /** OUT name - special property used by $EXEC API. */ |
aoqi@0 | 60 | public static final String OUT_NAME = "$OUT"; |
aoqi@0 | 61 | |
aoqi@0 | 62 | /** ERR name - special property used by $EXEC API. */ |
aoqi@0 | 63 | public static final String ERR_NAME = "$ERR"; |
aoqi@0 | 64 | |
aoqi@0 | 65 | /** EXIT name - special property used by $EXEC API. */ |
aoqi@0 | 66 | public static final String EXIT_NAME = "$EXIT"; |
aoqi@0 | 67 | |
aoqi@0 | 68 | /** Names of special properties used by $ENV API. */ |
aoqi@0 | 69 | public static final String ENV_NAME = "$ENV"; |
aoqi@0 | 70 | |
aoqi@0 | 71 | private static final String PWD_NAME = "PWD"; |
aoqi@0 | 72 | |
aoqi@0 | 73 | private ScriptingFunctions() { |
aoqi@0 | 74 | } |
aoqi@0 | 75 | |
aoqi@0 | 76 | /** |
aoqi@0 | 77 | * Nashorn extension: global.readLine (scripting-mode-only) |
aoqi@0 | 78 | * Read one line of input from the standard input. |
aoqi@0 | 79 | * |
aoqi@0 | 80 | * @param self self reference |
aoqi@0 | 81 | * @param prompt String used as input prompt |
aoqi@0 | 82 | * |
aoqi@0 | 83 | * @return line that was read |
aoqi@0 | 84 | * |
aoqi@0 | 85 | * @throws IOException if an exception occurs |
aoqi@0 | 86 | */ |
aoqi@0 | 87 | public static Object readLine(final Object self, final Object prompt) throws IOException { |
aoqi@0 | 88 | if (prompt != UNDEFINED) { |
aoqi@0 | 89 | System.out.print(JSType.toString(prompt)); |
aoqi@0 | 90 | } |
aoqi@0 | 91 | final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); |
aoqi@0 | 92 | return reader.readLine(); |
aoqi@0 | 93 | } |
aoqi@0 | 94 | |
aoqi@0 | 95 | /** |
aoqi@0 | 96 | * Nashorn extension: Read the entire contents of a text file and return as String. |
aoqi@0 | 97 | * |
aoqi@0 | 98 | * @param self self reference |
aoqi@0 | 99 | * @param file The input file whose content is read. |
aoqi@0 | 100 | * |
aoqi@0 | 101 | * @return String content of the input file. |
aoqi@0 | 102 | * |
aoqi@0 | 103 | * @throws IOException if an exception occurs |
aoqi@0 | 104 | */ |
aoqi@0 | 105 | public static Object readFully(final Object self, final Object file) throws IOException { |
aoqi@0 | 106 | File f = null; |
aoqi@0 | 107 | |
aoqi@0 | 108 | if (file instanceof File) { |
aoqi@0 | 109 | f = (File)file; |
aoqi@0 | 110 | } else if (file instanceof String) { |
aoqi@0 | 111 | f = new java.io.File((String)file); |
aoqi@0 | 112 | } |
aoqi@0 | 113 | |
aoqi@0 | 114 | if (f == null || !f.isFile()) { |
aoqi@0 | 115 | throw typeError("not.a.file", ScriptRuntime.safeToString(file)); |
aoqi@0 | 116 | } |
aoqi@0 | 117 | |
aoqi@0 | 118 | return new String(Source.readFully(f)); |
aoqi@0 | 119 | } |
aoqi@0 | 120 | |
aoqi@0 | 121 | /** |
aoqi@0 | 122 | * Nashorn extension: exec a string in a separate process. |
aoqi@0 | 123 | * |
aoqi@0 | 124 | * @param self self reference |
aoqi@0 | 125 | * @param string string to execute |
aoqi@0 | 126 | * @param input input |
aoqi@0 | 127 | * |
aoqi@0 | 128 | * @return output string from the request |
aoqi@0 | 129 | * @throws IOException if any stream access fails |
aoqi@0 | 130 | * @throws InterruptedException if execution is interrupted |
aoqi@0 | 131 | */ |
aoqi@0 | 132 | public static Object exec(final Object self, final Object string, final Object input) throws IOException, InterruptedException { |
aoqi@0 | 133 | // Current global is need to fetch additional inputs and for additional results. |
aoqi@0 | 134 | final ScriptObject global = Context.getGlobal(); |
aoqi@0 | 135 | |
aoqi@0 | 136 | // Break exec string into tokens. |
aoqi@0 | 137 | final StringTokenizer tokenizer = new StringTokenizer(JSType.toString(string)); |
aoqi@0 | 138 | final String[] cmdArray = new String[tokenizer.countTokens()]; |
aoqi@0 | 139 | for (int i = 0; tokenizer.hasMoreTokens(); i++) { |
aoqi@0 | 140 | cmdArray[i] = tokenizer.nextToken(); |
aoqi@0 | 141 | } |
aoqi@0 | 142 | |
aoqi@0 | 143 | // Set up initial process. |
aoqi@0 | 144 | final ProcessBuilder processBuilder = new ProcessBuilder(cmdArray); |
aoqi@0 | 145 | |
aoqi@0 | 146 | // Current ENV property state. |
aoqi@0 | 147 | final Object env = global.get(ENV_NAME); |
aoqi@0 | 148 | if (env instanceof ScriptObject) { |
aoqi@0 | 149 | final ScriptObject envProperties = (ScriptObject)env; |
aoqi@0 | 150 | |
aoqi@0 | 151 | // If a working directory is present, use it. |
aoqi@0 | 152 | final Object pwd = envProperties.get(PWD_NAME); |
aoqi@0 | 153 | if (pwd != UNDEFINED) { |
aoqi@0 | 154 | processBuilder.directory(new File(JSType.toString(pwd))); |
aoqi@0 | 155 | } |
aoqi@0 | 156 | |
aoqi@0 | 157 | // Set up ENV variables. |
aoqi@0 | 158 | final Map<String, String> environment = processBuilder.environment(); |
aoqi@0 | 159 | environment.clear(); |
aoqi@0 | 160 | for (Map.Entry<Object, Object> entry : envProperties.entrySet()) { |
aoqi@0 | 161 | environment.put(JSType.toString(entry.getKey()), JSType.toString(entry.getValue())); |
aoqi@0 | 162 | } |
aoqi@0 | 163 | } |
aoqi@0 | 164 | |
aoqi@0 | 165 | // Start the process. |
aoqi@0 | 166 | final Process process = processBuilder.start(); |
aoqi@0 | 167 | final IOException exception[] = new IOException[2]; |
aoqi@0 | 168 | |
aoqi@0 | 169 | // Collect output. |
aoqi@0 | 170 | final StringBuilder outBuffer = new StringBuilder(); |
aoqi@0 | 171 | Thread outThread = new Thread(new Runnable() { |
aoqi@0 | 172 | @Override |
aoqi@0 | 173 | public void run() { |
aoqi@0 | 174 | char buffer[] = new char[1024]; |
aoqi@0 | 175 | try (final InputStreamReader inputStream = new InputStreamReader(process.getInputStream())) { |
aoqi@0 | 176 | for (int length; (length = inputStream.read(buffer, 0, buffer.length)) != -1; ) { |
aoqi@0 | 177 | outBuffer.append(buffer, 0, length); |
aoqi@0 | 178 | } |
aoqi@0 | 179 | } catch (IOException ex) { |
aoqi@0 | 180 | exception[0] = ex; |
aoqi@0 | 181 | } |
aoqi@0 | 182 | } |
aoqi@0 | 183 | }, "$EXEC output"); |
aoqi@0 | 184 | |
aoqi@0 | 185 | // Collect errors. |
aoqi@0 | 186 | final StringBuilder errBuffer = new StringBuilder(); |
aoqi@0 | 187 | Thread errThread = new Thread(new Runnable() { |
aoqi@0 | 188 | @Override |
aoqi@0 | 189 | public void run() { |
aoqi@0 | 190 | char buffer[] = new char[1024]; |
aoqi@0 | 191 | try (final InputStreamReader inputStream = new InputStreamReader(process.getErrorStream())) { |
aoqi@0 | 192 | for (int length; (length = inputStream.read(buffer, 0, buffer.length)) != -1; ) { |
aoqi@0 | 193 | errBuffer.append(buffer, 0, length); |
aoqi@0 | 194 | } |
aoqi@0 | 195 | } catch (IOException ex) { |
aoqi@0 | 196 | exception[1] = ex; |
aoqi@0 | 197 | } |
aoqi@0 | 198 | } |
aoqi@0 | 199 | }, "$EXEC error"); |
aoqi@0 | 200 | |
aoqi@0 | 201 | // Start gathering output. |
aoqi@0 | 202 | outThread.start(); |
aoqi@0 | 203 | errThread.start(); |
aoqi@0 | 204 | |
aoqi@0 | 205 | // If input is present, pass on to process. |
aoqi@0 | 206 | try (OutputStreamWriter outputStream = new OutputStreamWriter(process.getOutputStream())) { |
aoqi@0 | 207 | if (input != UNDEFINED) { |
aoqi@0 | 208 | String in = JSType.toString(input); |
aoqi@0 | 209 | outputStream.write(in, 0, in.length()); |
aoqi@0 | 210 | } |
aoqi@0 | 211 | } catch (IOException ex) { |
aoqi@0 | 212 | // Process was not expecting input. May be normal state of affairs. |
aoqi@0 | 213 | } |
aoqi@0 | 214 | |
aoqi@0 | 215 | // Wait for the process to complete. |
aoqi@0 | 216 | final int exit = process.waitFor(); |
aoqi@0 | 217 | outThread.join(); |
aoqi@0 | 218 | errThread.join(); |
aoqi@0 | 219 | |
aoqi@0 | 220 | final String out = outBuffer.toString(); |
aoqi@0 | 221 | final String err = errBuffer.toString(); |
aoqi@0 | 222 | |
aoqi@0 | 223 | // Set globals for secondary results. |
aoqi@0 | 224 | global.set(OUT_NAME, out, false); |
aoqi@0 | 225 | global.set(ERR_NAME, err, false); |
aoqi@0 | 226 | global.set(EXIT_NAME, exit, false); |
aoqi@0 | 227 | |
aoqi@0 | 228 | // Propagate exception if present. |
aoqi@0 | 229 | for (int i = 0; i < exception.length; i++) { |
aoqi@0 | 230 | if (exception[i] != null) { |
aoqi@0 | 231 | throw exception[i]; |
aoqi@0 | 232 | } |
aoqi@0 | 233 | } |
aoqi@0 | 234 | |
aoqi@0 | 235 | // Return the result from stdout. |
aoqi@0 | 236 | return out; |
aoqi@0 | 237 | } |
aoqi@0 | 238 | |
aoqi@0 | 239 | private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) { |
aoqi@0 | 240 | return MH.findStatic(MethodHandles.lookup(), ScriptingFunctions.class, name, MH.type(rtype, types)); |
aoqi@0 | 241 | } |
aoqi@0 | 242 | } |