在逃生窗批处理文件中用户输入 [英] Escape user input in windows batch file

问题描述

我有一个接受口令作为用户输入Windows批处理文件：

I have a windows batch file that accepts a password as user input:

SET /P PASSWORD=Password:

此密码可能有需要转义像人物！。在密码变量，然后被传递给使用调用其他批处理文件

This password might have characters that need escaping like !. The PASSWORD variable then gets passed to other batch files using CALL

CALL Foo.Bat %PASSWORD%

我怎样才能确保特殊字符转义得到正确传递为参数？例如，如果用户输入％！£$我想％1 是 ％！£$在 Foo.bat 。

推荐答案

这是一个很好的挑战，但是这是一批先进工艺。结果
我会在这里用一个简单的方法，使用延迟扩展和不发送的内容，只有变量名。

It's a nice challenge, but this is advanced batch technic.
I would use here a simpler way, use delayed expansion and do not send the content, only the variable name.

这是绝对安全的，即使有特殊字符。

This is absolute safe even with special characters.

call foo.bat password

Foo.bat -----------------

Foo.bat -----------------

Setlocal EnableDelayedExpansion
Echo !password!

编辑：为解决原来的问题，结果
这是与所述内容而不是变量名来解决它的方法

这是必要的prepare内容的通过CALL到第二批文件发送的它。结果
很难使用类似 CALL foo.bat％preparedVariable％结果
它似乎是更好地使用 CALL foo.bat！preparedVariable！结果
但即使如此，我不行了，脱字由CALL相加倍。

It's necessary to prepare the content before sending it via CALL to second batch file.
It's hard to use something like CALL foo.bat %preparedVariable%
It's seems to be better to use CALL foo.bat !preparedVariable!
But even then I fail at the doubling of carets by the CALL-phase.

但后来我发现用百分比扩张只是CALL-阶段之后的简单方法。

But then I found a simple way to use the percent expansion just after the CALL-phase.

@echo off

setlocal DisableDelayedExpansion
rem set /p "complex=Complex Input "
set "complex=xx! & "!^&"ab^^ " ^^^^cd%%"

setlocal EnableDelayedExpansion

call :prepareForCallBatch complex PreparedParam
echo Send   =!PreparedParam!#
set complex
echo(
call ShowParam.bat %%PreparedParam%%
exit /b

:: Prepare special characters &|<>"^ for a batch call
:prepareForCallBatch
set "temp=!%~1!"

set "temp=!temp:^=^^!"
set "temp=!temp:&=^&!"
set "temp=!temp:|=^|!"
set "temp=!temp:<=^<!"
set "temp=!temp:>=^>!"
set "temp=!temp:"=^^"!"
set "%~2=!temp!"
exit /b

要看到的真正的在ShowParam.bat参数我用的是这样的结果
的 ShowParam.bat 的

To see the real parameters in ShowParam.bat I use something like this
ShowParam.bat

@echo off
setlocal
set prompt=
@echo on
REM # %* #

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