用引号对批量输入进行消毒？

时间：2020-01-21 22:29:39

标签： windows batch-file cmd 



Rem ask for user input
set /p installerchoice= Please enter number for installer you wish to use:

Rem check to make sure input is a number
SET "var="&for /f "delims=0123456789" %%n in ("%installerchoice%") do set "var=%%n"
if defined var Goto Choose

rem check to make sure input is not zero
if %installerchoice% equ 0 goto Choose

rem check to make sure input isn't to high
if %installerchoice% gtr %Count% goto Choose
lection=%%i

我正在尝试确保输入有效的输入（介于1到多少个选项之间的数值）。现在似乎唯一引起问题的是如果输入了“。”是否有防止它撞到蝙蝠的方法？

3 个答案:

答案 0 :(得分：1)

对于单位数输入，请使用选择

CHOICE /N /C 123456789 /M "Select Installer Number 1 2 3 4 5 6 7 8 9"
GOTO :installer%errorlevel%

并为安装程序使用标签，例如：

:installer1
::commands

:installer2
::commands

要提供更多选项和灵活性，请使用输入验证功能


@ECHO OFF
::: REM Delayed expansion is required only for testing of Second Call Parameter
::: Is not required if that testing is removed.
SETLOCAL EnableDelayedExpansion

::: REM The below 6 lines allow testing of the function, and are not part of the function.
:start
cls
CALL :Filter option number
ECHO %option%
pause
GOTO :start

:::::::::::::::::::::::::::::: Function by T3RRY
::: Using this Function-
::: When Needing User Input:
:::
::: CALL :Filter <VarName> <AllowType>
::: Where <VarName> is replaced with the Variable name to be Set
::: And <AllowType> is replaced with letter, number, or alphanumerical

:Filter

::: Assign the variable (Passed by call Argument) to be set and tested

SET "testinput=%1"
SET "permitted=%~2"

::: Test Parameter Usage is Correct- For Debugging Only.

IF NOT DEFINED testinput (
ECHO Improper use of Filter Function. CALL :Filter must include a Parameter to define the Variable to be Set
Pause
Exit
)

Set P_True=0
IF DEFINED permitted (
    IF /I "%permitted%"=="number" Set /a P_True+=1
    IF /I "%permitted%"=="letter" Set /a P_True+=1
    IF /I "%permitted%"=="alphanumerical" Set /a P_True+=1
    IF "!P_True!"=="0" (
    ECHO Incorrect Parameter used for CALL :Filter 2nd Call Parameter.
    ECHO Parameter may be undefined, If Defined must include "number" OR "letter" OR "alphanumerical"
    Pause
    Exit
    )
)

::: Expand testinput to the Name of the Variable to be Assigned, Ensures Undefined

SET %testinput%=

::: Ensure Undefined Value for Input

SET input=

:Get_Input

::: Exit Filter once Acceptable Variable is Set

IF DEFINED input GOTO return

::: Create and start VBS script to Launch an Input Box and Store the input to text file for retrieval from this Batch program.

SET /P input=[Select %testinput%:]

::: Test to ensure Variable defined. Needed here to prevent environment variable not defined message ahead of next test Should the variable not be defined.

IF NOT DEFINED input GOTO invInput

::: Test for Doublequotes and reset variable if present

SET Input | FIND """" >NUL
IF NOT ERRORLEVEL 1 SET Input=

IF NOT DEFINED input GOTO invInput

:: REM Block Tilde

SET Input | FIND "~" >NUL
IF NOT ERRORLEVEL 1 SET Input=

IF NOT DEFINED input GOTO invInput

::: Test for Spaces

IF NOT "%input%"=="%input: =%" GOTO invInput

::: Test for all other standard Symbols.
::: To permit symbols REM out permitted Symbol and Call Filter without Second Parameter.

IF NOT "%input%"=="%input:&=%" GOTO invInput
IF NOT "%input%"=="%input:(=%" GOTO invInput
IF NOT "%input%"=="%input:)=%" GOTO invInput
IF NOT "%input%"=="%input:<=%" GOTO invInput
IF NOT "%input%"=="%input:>=%" GOTO invInput
IF NOT "%input%"=="%input:{=%" GOTO invInput
IF NOT "%input%"=="%input:}=%" GOTO invInput
IF NOT "%input%"=="%input:]=%" GOTO invInput
IF NOT "%input%"=="%input:[=%" GOTO invInput
IF NOT "%input%"=="%input:#=%" GOTO invInput
IF NOT "%input%"=="%input:^=%" GOTO invInput
IF NOT "%input%"=="%input:+=%" GOTO invInput
IF NOT "%input%"=="%input:-=%" GOTO invInput
IF NOT "%input%"=="%input:/=%" GOTO invInput
IF NOT "%input%"=="%input:\=%" GOTO invInput
IF NOT "%input%"=="%input:|=%" GOTO invInput
IF NOT "%input%"=="%input:$=%" GOTO invInput
IF NOT "%input%"=="%input:!=%" GOTO invInput
IF NOT "%input%"=="%input:?=%" GOTO invInput
IF NOT "%input%"=="%input:@=%" GOTO invInput
IF NOT "%input%"=="%input:'=%" GOTO invInput
IF NOT "%input%"=="%input:,=%" GOTO invInput
IF NOT "%input%"=="%input:.=%" GOTO invInput
IF NOT "%input%"=="%input:;=%" GOTO invInput
IF NOT "%input%"=="%input:`=%" GOTO invInput

:: REM Length restriction. Adjust the length (Number) or Rem out as Desired

::: IF NOT "%input:~12%"=="" GOTO invInput

IF NOT DEFINED permitted GOTO :Get_Input
IF /I "%permitted%"=="number" GOTO :P_numbers
IF /I "%permitted%"=="letter" GOTO :P_letters
IF /I "%permitted%"=="alphanumerical" GOTO :P_alphanumerical

::: REM Permit only Numbers, Letters, or Letters and Numbers. Also Blocks *,! and %

:P_numbers
echo.%input%| findstr /R "[^0-9]" >nul 2>nul
if NOT errorlevel 1 GOTO invInput
GOTO :Get_Input

:P_letters
echo.%input%| findstr /R "[^a-zA-Z]" >nul 2>nul
if NOT errorlevel 1 GOTO invInput
GOTO :Get_Input

:P_alphanumerical
echo.%input%| findstr /R "[^a-zA-Z0-9]" >nul 2>nul
if NOT errorlevel 1 GOTO invInput
GOTO :Get_Input

:invInput

SET input=

::: REM Specifies the permitted input types.

IF DEFINED permitted (
    ECHO Input of %permitted% characters is allowed. Other Symbols and Characters are Not Permitted.
) else (
ECHO Invalid Character Entered. Try Again
)

GOTO :Get_Input

:return

::: assigns the input value to the variable name being validated.

SET "%testinput%=%input%"

SET input=

GOTO :EOF

答案 1 :(得分：1)

这是我在您的代码中处理任务的方式：

:Choose
@Set "InstallerChoice="
@Set /P "InstallerChoice=Please enter the number for the installer you wish to use: "
@SetLocal EnableDelayedExpansion
@(Echo(!InstallerChoice!|"%__AppDir__%findstr.exe" /RX "[123456789][0123456789]* 0">NUL||(EndLocal&Goto Choose)) 2>NUL
@EndLocal
@Echo Your number %InstallerChoice% is valid.
@Pause

但是，如果您提供了其余的代码（我认为已经在for循环中解析了一个目录，并以类似菜单的方式将文件名分配给了数字），则可能存在更好的方法或不同的方法。 / em>

答案 2 :(得分：1)

解决方案非常简单：只需在for /F循环之前启用delayed variable expansion并将其用于变量!InstallerChoice!，则用户输入的任何"将不再被用户识别解析器：

:Choose
set "InstallerChoice=" & rem // (reset variable to avoid keeping previous value)
set /P InstallerChoice="Please enter number for installer you wish to use: "

rem // Check to make sure input is a number:
set "var=" & setlocal EnableDelayedExpansion
for /F "eol=0 delims=0123456789" %%N in ("!InstallerChoice!") do set "var=%%N"
if defined var (endlocal & Goto Choose) else endlocal

rem // Check to make sure input is not zero:
if %InstallerChoice% equ 0 goto Choose

rem // Check to make sure input isn't to high:
if %InstallerChoice% gtr %Count% goto Choose

顺便说一句，让我建议将set "InstallerChoice="放在set /P之前，因为当用户仅按 {Enter} 时，将保留以前的值不然
并且应该在eol=0循环选项中添加for /F，以免当用户输入以默认eol字符;开头的内容时遇到麻烦。

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