Batch login system - batch-file

Question

Hi guys i would like to make a batch (register-login) programm,
What i have so far there are two files called clientdata.bat and data.txt.
What i want is a code that reads the data.txt file, looks for a password and procceds to the login. My code is this.
:register
set /p regname= Name:
echo.
set /p regpass= Password:
cls
echo %regname% %regpass% >> data.txt
This works perfectly, when it comes to saving data to data.txt file.
But my problem is in the login sector
:login
cls
set /p logname= Name:
echo.
set /p logpass= Password:
This is what i have so far in the login section. PLease help!!

Answer 1

Use for /f to parse data.txt:
:login
cls
set /p logname= Name:
echo.
set /p logpass= Password:
call :authenticate
if %errorlevel% equ 1 echo Wrong password & goto error
if %errorlevel% equ 2 echo No such user & goto error
echo Authenticated successfully
pause
exit
:error
echo format c:
pause
exit
:authenticate
for /f "tokens=1,2" %%u in (data.txt) do (
if "%%u"=="%logname%" (
if "%%v"=="%logpass%" exit /b 0
exit /b 1
)
)
exit /b 2

Answer 2

I made a system that uses an online PHP mysql database. The php codes would check passwords and add users and stuff. I based it all on this little powershell script you can call using this command: Powershell "& ""%cd%\RespondURL.ps1""" after putting the url you want to load and get a text response from in a text file urls.txt. The response is stored in out.txt and you can use Find and errorlevel handling to read it, or just use set /p response=<out.txt. Its over the top but its great if you want to update it and manage it online.
Note that it requires your Powershell execution policy to be unrestricted. Here is the script:
$cur="C:\users\Public"
$contents = Get-Content $cur\urls.txt
$num=1
foreach($content in $contents){
$stat=(Invoke-WebRequest -Uri "$content").Content
echo $stat$num |Out-File -FilePath $cur\out.txt -Append
$num=$num + 1
}
echo $error.count |Out-File -FilePath $cur\Errors.txt
If the script encounters errors, it will put a number over 0 in the file Errors.txt