327 lines
9.6 KiB
JavaScript
327 lines
9.6 KiB
JavaScript
/*
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* readlineSync
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* https://github.com/anseki/readline-sync
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*
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* Copyright (c) 2015 anseki
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* Licensed under the MIT license.
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*/
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'use strict';
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var
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IS_WIN = process.platform === 'win32',
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SHELL_PATH = IS_WIN ? 'cscript.exe' : '/bin/sh',
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SHELL_CMD = __dirname + (IS_WIN ? '\\read.cs.js' : '/read.sh'),
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ALGORITHM_CIPHER = 'aes-256-cbc',
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ALGORITHM_HASH = 'sha256',
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DEFAULT_ERR_MSG = 'The platform doesn\'t support interactive reading',
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fs = require('fs'),
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childProc = require('child_process'),
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promptText = '> ',
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encoding = 'utf8',
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bufSize = 1024,
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print,
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tempdir, salt = 0, useShell = false;
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function _readlineSync(options) { // options.display is string
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var input = '', fd, buffer, rsize, res, isOpened, fsBind, constBind;
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if (options.display !== '' && typeof print === 'function')
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{ print(options.display, encoding); }
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if (useShell || options.noEchoBack || options.keyIn) {
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res = _readlineShell(options);
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if (res.error) { throw res.error; }
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input = res.input;
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} else {
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if (IS_WIN) { // r/w mode not supported
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if (process.stdin.isTTY && process.stdout.isTTY) {
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if (options.display !== '') {
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// process.stdout.write(options.display, encoding);
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fs.writeSync(process.stdout.fd, options.display);
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options.display = '';
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}
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fd = process.stdin.fd;
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isOpened = true;
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} else {
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try {
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if (options.display !== '') {
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fd = fs.openSync('\\\\.\\CON', 'w');
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fs.writeSync(fd, options.display);
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fs.closeSync(fd);
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options.display = '';
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}
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fd = fs.openSync('\\\\.\\CON', 'rs');
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isOpened = true;
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} catch (e) {}
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if (!isOpened || options.display !== '') { // Retry
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try {
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// For raw device path
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// On XP, 2000, 7 (x86), it might fail.
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// And, process.binding('fs') might be no good.
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fsBind = process.binding('fs');
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constBind = process.binding('constants');
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if (options.display !== '') {
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fd = fsBind.open('CONOUT$',
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constBind.O_RDWR | constBind.O_SYNC, parseInt('0666', 8));
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fs.writeSync(fd, options.display);
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fs.closeSync(fd);
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options.display = '';
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}
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fd = fsBind.open('CONIN$',
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constBind.O_RDWR | constBind.O_SYNC, parseInt('0666', 8));
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isOpened = true;
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} catch (e) {}
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}
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}
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} else {
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try {
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fd = fs.openSync('/dev/tty', 'rs+');
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isOpened = true;
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if (options.display !== '') {
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fs.writeSync(fd, options.display);
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options.display = '';
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}
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} catch (e) {}
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}
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if (isOpened && options.display === '') {
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buffer = new Buffer(bufSize);
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while (true) {
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rsize = 0;
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try {
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rsize = fs.readSync(fd, buffer, 0, bufSize);
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} catch (e) {
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if (e.code === 'EOF') { break; }
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res = _readlineShell(options);
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if (res.error) { throw res.error; }
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input += res.input;
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break;
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}
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if (rsize === 0) { break; }
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input += buffer.toString(encoding, 0, rsize);
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if (/[\r\n]$/.test(input)) { break; }
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}
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} else {
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res = _readlineShell(options);
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if (res.error) { throw res.error; }
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input = res.input;
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}
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if (isOpened && !process.stdin.isTTY) { fs.closeSync(fd); }
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}
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return options.noTrim ? input.replace(/[\r\n]+$/, '') : input.trim();
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}
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function _readlineShell(options) {
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var cmdArgs = [], execArgs, res = {},
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execOptions = {
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env: process.env,
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// ScriptPW (Win XP and Server2003) needs TTY stream as STDIN.
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// In this case, If STDIN isn't TTY, an error is thrown.
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stdio: [process.stdin],
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encoding: encoding
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};
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// To send any text to crazy Windows shell safely.
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function encodeDOS(arg) {
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return arg.replace(/[^\w\u0080-\uFFFF]/g, function(chr) {
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return '#' + chr.charCodeAt(0) + ';';
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});
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}
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if (options.noEchoBack) { cmdArgs.push('--noechoback'); }
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if (options.keyIn) { cmdArgs.push('--keyin'); }
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if (options.display !== '') {
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cmdArgs = cmdArgs.concat('--display', IS_WIN ?
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[encodeDOS(options.display), '--encoded'] : options.display);
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}
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if (childProc.execFileSync) {
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execArgs = (IS_WIN ? ['//nologo', SHELL_CMD] : [SHELL_CMD]).concat(cmdArgs);
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try {
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res.input = childProc.execFileSync(SHELL_PATH, execArgs, execOptions);
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} catch (e) { // non-zero exit code
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res.error = new Error(DEFAULT_ERR_MSG);
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res.error.method = 'execFileSync';
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res.error.command = SHELL_CMD;
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res.error.args = cmdArgs;
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res.error.shellMessage = e.stderr.trim();
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}
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} else {
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res = _execSyncByFile(cmdArgs, execOptions);
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}
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if (!res.error) {
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res.input = res.input.replace(/^'|'$/g, '');
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options.display = '';
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}
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return res;
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}
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// piping via files (node v0.10-)
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function _execSyncByFile(cmdArgs, execOptions) {
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function getTempfile(name) {
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var path = require('path'), filepath, suffix = '', fd;
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tempdir = tempdir || require('os').tmpdir();
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while (true) {
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filepath = path.join(tempdir, name + suffix);
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try {
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fd = fs.openSync(filepath, 'wx');
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} catch (e) {
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if (e.code === 'EEXIST') {
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suffix++;
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continue;
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} else {
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throw e;
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}
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}
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fs.closeSync(fd);
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break;
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}
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return filepath;
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}
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var execArgs, interpreter, res = {},
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pathStdout = getTempfile('readline-sync.stdout'),
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pathStderr = getTempfile('readline-sync.stderr'),
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pathExit = getTempfile('readline-sync.exit'),
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pathDone = getTempfile('readline-sync.done'),
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crypto = require('crypto'), shasum, decipher, password;
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shasum = crypto.createHash(ALGORITHM_HASH);
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shasum.update('' + process.pid + (salt++) + Math.random());
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password = shasum.digest('hex');
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decipher = crypto.createDecipher(ALGORITHM_CIPHER, password);
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if (IS_WIN) {
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interpreter = process.env.ComSpec || 'cmd.exe';
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process.env.Q = '"'; // The quote (") that isn't escaped.
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// `()` for ignore space by echo
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execArgs = ['/V:ON', '/S', '/C',
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'(%Q%' + interpreter + '%Q% /V:ON /S /C %Q%' +
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'%Q%' + SHELL_PATH + '%Q% //nologo %Q%' + SHELL_CMD + '%Q%' +
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cmdArgs.map(function(arg) { return ' %Q%' + arg + '%Q%'; }).join('') +
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' & (echo !ERRORLEVEL!)>%Q%' + pathExit + '%Q%%Q%) 2>%Q%' + pathStderr + '%Q%' +
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' |%Q%' + process.execPath + '%Q% %Q%' + __dirname + '\\encrypt.js%Q%' +
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' %Q%' + ALGORITHM_CIPHER + '%Q% %Q%' + password + '%Q%' +
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' >%Q%' + pathStdout + '%Q%' +
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' & (echo 1)>%Q%' + pathDone + '%Q%'];
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} else {
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interpreter = SHELL_PATH;
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execArgs = ['-c',
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// Use `()`, not `{}` for `-c` (text param)
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'("' + SHELL_PATH + '" "' + SHELL_CMD + '"' +
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cmdArgs.map(function(arg)
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{ return " '" + arg.replace(/'/g, "'\\''") + "'"; }).join('') +
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'; echo $?>"' + pathExit + '") 2>"' + pathStderr + '"' +
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' |"' + process.execPath + '" "' + __dirname + '/encrypt.js"' +
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' "' + ALGORITHM_CIPHER + '" "' + password + '"' +
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' >"' + pathStdout + '"' +
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'; echo 1 >"' + pathDone + '"'];
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}
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try {
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childProc.spawn(interpreter, execArgs, execOptions);
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} catch (e) {
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res.error = new Error(e.message);
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res.error.method = '_execSyncByFile - spawn';
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res.error.interpreter = interpreter;
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}
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while (fs.readFileSync(pathDone, {encoding: encoding}).trim() !== '1') {}
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if (fs.readFileSync(pathExit, {encoding: encoding}).trim() === '0') {
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res.input =
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decipher.update(fs.readFileSync(pathStdout, {encoding: 'binary'}), 'hex', encoding) +
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decipher.final(encoding);
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} else {
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res.error = new Error(DEFAULT_ERR_MSG);
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res.error.method = '_execSyncByFile';
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res.error.command = SHELL_CMD;
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res.error.args = cmdArgs;
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res.error.shellMessage = fs.readFileSync(pathStderr, {encoding: encoding}).trim();
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}
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fs.unlinkSync(pathStdout);
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fs.unlinkSync(pathStderr);
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fs.unlinkSync(pathExit);
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fs.unlinkSync(pathDone);
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return res;
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}
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// for dev
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exports._useShellSet = function(use) { useShell = use; };
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exports.setPrint = function(fnc) { print = fnc; };
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exports.setPrompt = function(newPrompt) {
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/* jshint eqnull:true */
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if (newPrompt != null) {
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/* jshint eqnull:false */
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promptText = newPrompt;
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}
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return promptText;
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};
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exports.setEncoding = function(newEncoding) {
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if (typeof newEncoding === 'string') {
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encoding = newEncoding;
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}
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return encoding;
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};
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exports.setBufferSize = function(newBufSize) {
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newBufSize = parseInt(newBufSize, 10);
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if (!isNaN(newBufSize) && typeof newBufSize === 'number') {
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bufSize = newBufSize;
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}
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return bufSize;
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};
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exports.prompt = function(options) {
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var readOptions = {
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display: promptText + '',
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noEchoBack: !!(options && options.noEchoBack),
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keyIn: false,
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noTrim: !!(options && options.noTrim)
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};
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return _readlineSync(readOptions);
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};
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exports.question = function(query, options) {
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var readOptions = {
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/* jshint eqnull:true */
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display: query != null ? query + '' : '',
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/* jshint eqnull:false */
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noEchoBack: !!(options && options.noEchoBack),
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keyIn: false,
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noTrim: !!(options && options.noTrim)
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};
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return _readlineSync(readOptions);
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};
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exports.keyIn = function(query, options) {
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var readOptions = {
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/* jshint eqnull:true */
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display: query != null ? query + '' : '',
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/* jshint eqnull:false */
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noEchoBack: !!(options && options.noEchoBack),
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keyIn: true,
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noTrim: true
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};
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return _readlineSync(readOptions);
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};
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