如何在nodejs控制台中隐藏密码？

我想隐藏密码输入.我在stackoverflow中看到很多答案但是如果我按退格键我无法验证值.条件返回false.

我尝试了几种解决方案来覆盖这个功能,但是如果按下退格键,我遇到缓冲区的问题,我得到了隐形字符\b.

我按下:"A",退格,"B",我在缓冲区中有这个:"\ u0041\u0008\u0042"(toString()='A\bB')而不是"B".

我有 :

var readline = require('readline');

var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

rl.question("password : ", function(password) {
    console.log("Your password : " + password);
});

小智.. 36

这可以通过读取线来处理,通过静音流拦截输出,如在npm(https://github.com/isaacs/read/blob/master/lib/read.js)上的读取项目中所做的那样:

var readline = require('readline');
var Writable = require('stream').Writable;

var mutableStdout = new Writable({
  write: function(chunk, encoding, callback) {
    if (!this.muted)
      process.stdout.write(chunk, encoding);
    callback();
  }
});

mutableStdout.muted = false;

var rl = readline.createInterface({
  input: process.stdin,
  output: mutableStdout,
  terminal: true
});

rl.question('Password: ', function(password) {
  console.log('\nPassword is ' + password);
  rl.close();
});

mutableStdout.muted = true;

A-312.. 26

覆盖应用程序的readline接口的_writeToOutput:https://github.com/nodejs/node/blob/v9.5.0/lib/readline.js#L291

要隐藏密码输入,您可以使用:

第一个解决方案:"密码:[= - ]"

当您按下触摸时,此解决方案具有动画:

password : [-=]
password : [=-]

代码 :

var readline = require('readline');

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.stdoutMuted = true;

rl.query = "Password : ";
rl.question(rl.query, function(password) {
  console.log('\nPassword is ' + password);
  rl.close();
});

rl._writeToOutput = function _writeToOutput(stringToWrite) {
  if (rl.stdoutMuted)
    rl.output.write("\x1B[2K\x1B[200D"+rl.query+"["+((rl.line.length%2==1)?"=-":"-=")+"]");
  else
    rl.output.write(stringToWrite);
};

此序列"\ x1B [2K\x1BD"使用两个转义序列:

Esc [2K:清除整条线.

Esc D:向上移动/滚动窗口一行.

要了解更多信息,请阅读:http://ascii-table.com/ansi-escape-sequences-vt-100.php

第二个解决方案:"密码:****"

var readline = require('readline');

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.stdoutMuted = true;

rl.question('Password: ', function(password) {
  console.log('\nPassword is ' + password);
  rl.close();
});

rl._writeToOutput = function _writeToOutput(stringToWrite) {
  if (rl.stdoutMuted)
    rl.output.write("*");
  else
    rl.output.write(stringToWrite);
};

您可以通过以下方式清除历

rl.history = rl.history.slice(1);

如果您使用严格模式更改'\ 033 [2K\033 [200D'到'\ x1B [2K\x1B [200D'.这只是将已弃用的八进制转义符更改为等效的十六进制转义符. (2认同)

estaples.. 7

您可以使用readline-sync模块而不是节点readline.

密码隐藏功能是通过它的"hideEchoBack"选项内置的.

https://www.npmjs.com/package/readline-sync