124 lines
4.3 KiB
Java
124 lines
4.3 KiB
Java
/*
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* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.net.Socket;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.Collections;
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public class CustomEditor implements AutoCloseable {
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public static final int SOURCE_CODE = 0;
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public static final int GET_SOURCE_CODE = 1;
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public static final int REMOVE_CODE = 2;
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public static final int GET_FILENAME = 3;
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public static final int EXIT_CODE = -1;
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public static final int ACCEPT_CODE = -2;
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public static final int CANCEL_CODE = -3;
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private final Socket socket;
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private final Path path;
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private final StringWriter writer;
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private final String source;
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public CustomEditor(int port, String fileName) throws IOException {
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this.socket = new Socket((String) null, port);
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this.path = Paths.get(fileName);
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this.writer = new StringWriter();
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this.source = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
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}
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public void loop() throws IOException {
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DataInputStream input = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
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DataOutputStream output = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
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while (true) {
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int cmd = input.readInt();
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switch (cmd) {
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case EXIT_CODE: {
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Files.write(path, Collections.singletonList(writer.toString()));
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return;
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}
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case GET_SOURCE_CODE: {
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writeString(output, source);
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break;
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}
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case REMOVE_CODE: {
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// only for external editor
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Files.delete(path);
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break;
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}
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case GET_FILENAME: {
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writeString(output, path.toString());
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break;
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}
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case CANCEL_CODE: {
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return;
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}
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case ACCEPT_CODE: {
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Files.write(path, Collections.singletonList(writer.toString()));
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break;
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}
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case SOURCE_CODE: {
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int length = input.readInt();
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byte[] bytes = new byte[length];
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input.readFully(bytes);
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writer.write(new String(bytes, StandardCharsets.UTF_8));
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break;
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}
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}
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}
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}
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private void writeString(DataOutputStream output, String s) throws IOException {
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byte[] bytes = s.getBytes(StandardCharsets.UTF_8);
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output.writeInt(bytes.length);
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output.write(bytes);
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output.flush();
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}
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public static void main(String[] args) throws IOException {
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if (args.length != 2) {
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System.err.println("Usage: port file");
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System.exit(1);
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}
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try (CustomEditor editor = new CustomEditor(Integer.parseInt(args[0]), args[1])) {
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editor.loop();
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}
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}
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@Override
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public void close() throws IOException {
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socket.close();
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}
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}
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