401 lines
11 KiB
JavaScript
401 lines
11 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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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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TTY = process.binding('tty_wrap').TTY,
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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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mask = '*',
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useExt = false,
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fdR = 'none', fdW, ttyR, isRawMode = false,
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extHostPath, extScriptPath, tempdir, salt = 0;
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function readlineSync(options) { // display, mask are string
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var input = '', isEditable, displayInput;
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function tryExt() {
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var res = readlineExt(options);
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if (res.error) { throw res.error; }
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return res.input;
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}
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// Node v0.10- returns an error if same mode is set.
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function setRawMode(mode) {
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if (mode === isRawMode) { return true; }
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if (ttyR.setRawMode(mode) !== 0) { return false; }
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isRawMode = mode;
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return true;
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}
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(function() {
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var fsB, constants;
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function getFsB() {
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if (!fsB) {
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fsB = process.binding('fs'); // For raw device path
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constants = process.binding('constants');
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}
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return fsB;
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}
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if (typeof fdR !== 'string') { return; }
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fdR = null;
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if (IS_WIN) {
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if (process.stdin.isTTY) {
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fdR = process.stdin.fd;
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ttyR = process.stdin._handle;
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} else {
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try {
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// The stream by fs.openSync('\\\\.\\CON', 'r') can't switch to raw mode.
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// 'CONIN$' might fail on XP, 2000, 7 (x86).
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fdR = getFsB().open('CONIN$', constants.O_RDWR, parseInt('0666', 8));
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ttyR = new TTY(fdR, true);
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} catch (e) {}
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}
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if (process.stdout.isTTY) {
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fdW = process.stdout.fd;
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} else {
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try {
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fdW = fs.openSync('\\\\.\\CON', 'w');
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} catch (e) {}
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if (typeof fdW !== 'number') { // Retry
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try {
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fdW = getFsB().open('CONOUT$', constants.O_RDWR, parseInt('0666', 8));
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} catch (e) {}
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}
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}
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} else {
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if (process.stdin.isTTY) {
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try {
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fdR = fs.openSync('/dev/tty', 'r'); // device file, not process.stdin
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ttyR = process.stdin._handle;
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} catch (e) {}
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} else {
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// Node v0.12 read() fails.
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try {
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fdR = fs.openSync('/dev/tty', 'r');
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ttyR = new TTY(fdR, false);
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} catch (e) {}
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}
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if (process.stdout.isTTY) {
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fdW = process.stdout.fd;
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} else {
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try {
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fdW = fs.openSync('/dev/tty', 'w');
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} catch (e) {}
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}
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}
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})();
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// Call before tryExt()
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if (options.display !== '' && typeof print === 'function')
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{ print(options.display, encoding); }
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isEditable = !options.noEchoBack && !options.keyIn;
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(function() { // try read
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var buffer, reqSize, readSize, chunk;
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if (useExt || !ttyR ||
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typeof fdW !== 'number' && (options.display !== '' || !isEditable)) {
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input = tryExt();
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return;
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}
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if (options.display !== '') {
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fs.writeSync(fdW, options.display);
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options.display = '';
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}
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if (!setRawMode(!isEditable)) {
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input = tryExt();
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return;
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}
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buffer = new Buffer((reqSize = options.keyIn ? 1 : bufSize));
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while (true) {
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readSize = 0;
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try {
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readSize = fs.readSync(fdR, buffer, 0, reqSize);
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} catch (e) {
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if (e.code === 'EOF') { break; }
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setRawMode(false);
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input += tryExt();
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return;
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}
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if (readSize === 0) { break; }
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chunk = buffer.toString(encoding, 0, readSize);
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// other ctrl-chars
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if ((chunk = chunk.replace(/[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]/g, '')) === '')
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{ continue; }
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if (!isEditable && (displayInput = chunk.replace(/[\r\n]/g, '')) !== '') {
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if (options.noEchoBack) {
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displayInput = options.mask === '' ? '' :
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(new Array(displayInput.length + 1)).join(options.mask);
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}
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if (displayInput !== '') { fs.writeSync(fdW, displayInput); }
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}
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input += chunk;
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if (/[\r\n]$/.test(input) ||
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options.keyIn && input.length >= reqSize) { break; }
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}
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if (!isEditable) { fs.writeSync(fdW, '\n'); }
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setRawMode(false);
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})();
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if (typeof print === 'function') {
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displayInput = input.replace(/[\r\n]/g, '');
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print((options.noEchoBack ?
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(new Array(displayInput.length + 1)).join(options.mask) : displayInput) +
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'\n', encoding);
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}
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return options.noTrim || options.keyIn ?
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input.replace(/[\r\n]+$/, '') : input.trim();
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}
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function readlineExt(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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extHostPath = extHostPath || (IS_WIN ? 'cscript.exe' : '/bin/sh');
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extScriptPath = extScriptPath || (__dirname + (IS_WIN ? '\\read.cs.js' : '/read.sh'));
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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', extScriptPath] : [extScriptPath]).concat(cmdArgs);
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try {
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res.input = childProc.execFileSync(extHostPath, 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 = extScriptPath;
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res.error.args = cmdArgs;
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res.error.ExtMessage = e.stderr.trim();
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res.error.code = e.code;
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res.error.signal = e.signal;
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res.error.exitCode = e.status;
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}
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} else {
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res = _execFileSync(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 _execFileSync(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 = {}, exitCode,
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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%' + extHostPath + '%Q% //nologo %Q%' + extScriptPath + '%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 = extHostPath;
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execArgs = ['-c',
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// Use `()`, not `{}` for `-c` (text param)
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'("' + extHostPath + '" "' + extScriptPath + '"' +
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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 = '_execFileSync - 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 ((exitCode = 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 = '_execFileSync';
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res.error.command = extScriptPath;
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res.error.args = cmdArgs;
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res.error.ExtMessage = fs.readFileSync(pathStderr, {encoding: encoding}).trim();
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res.error.exitCode = +exitCode;
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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._useExtSet = function(use) { useExt = 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.setMask = function(newMask) {
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if (typeof newMask === 'string') {
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mask = newMask;
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}
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return mask;
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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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mask: mask,
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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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mask: mask,
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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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mask: mask,
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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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