parse batch line by line

问题

i am trying to parse the output of another function which is output line by line. to understand the function, it returns several lines of parameter and numbers like "top=123456789" or "low=123456789" (without the quotations) -

i try to parse the lines now with

for /F "delims=" %%a in ('%%I ^| findstr top') do set updir=%%1
set "updir=%1:~4%" 
echo. %updir%

i am trying to get the pure numbers by trimming the known keywords like top, which would need then to be set to a var to return (%~1% ???) to a calling function back (other batch file).

could anyone help me with this please? shure it would be better to trim right from "=".

UPDATE:

this is the code returning the lines from the script i linked. i tried several ways to parse the return but i seem to be blind or too stupid to see, all is going weird.

for /f "delims=" %%I in ('cscript /nologo /e:jscript "%~f0" "%URL%"') do (
rem process the HTML line-by-line

org echo(%%I

try1 (echo %%I|findstr top

try2 for /F "delims=" %%a in ('%%I ^| findstr top') do set updir=%%a
try2 echo. %updir%

try3 for /F "delims=" %%a in ('%%I') do findstr top
try3 echo. %2%


)

didn't work either

for /F "tokens=1,2delims==" %%a in ('%%I') do if %1 == top set updir=%%b
echo %updir%

i tried both delim version beneath (too the tokens/delims version) but i don't get it right.

UPDATE SOLUTION:

for the ones reading the question here some additional comment:

rem trim whitespace from beginning and end of line
for /f "tokens=*" %%x in ("%%~I") do set "line=%%x"

rem test that trimmed line matches "variable=number"

to find a single item like e.g. "top" you have to add "to" or adjust whole first token
echo !line! | findstr /i "^to[a-z]=[0-9]" >NUL && (

rem test was successful.  Scrape number.
for /f "tokens=2 delims==" %%x in ("%%I") do set "value=%%x"
echo !value!
)

回答1:

If all you wish to do is to is to skip all lines until you find one that matches "text=numerals", then scrape the numeric portion of that line, all you need to do is this:

for /f "delims=" %%I in ('cscript /nologo /e:jscript "%~f0" "%URL%"') do (

    rem trim whitespace from beginning and end of line
    for /f "tokens=*" %%x in ("%%~I") do set "line=%%x"

    rem test that trimmed line matches "variable=number"
    echo !line! | findstr /i "^[a-z]*=[0-9]*$" >NUL && (

        rem test was successful.  Scrape number.
        for /f "tokens=2 delims==" %%x in ("%%I") do set "value=%%x"
    )
)

I think that's right, anyway. I didn't test it.

But I suspect that this is not going to work as you intend, since what you are scraping will probably include HTML tags. We will probably not be able to help you scrape the HTML unless you pastebin the HTML source of an example page, and explain what you wish to scrape from that source example.

回答2:

does this fit your needs?

for /F "delims=" %%a in ('type file.txt ^| findstr "top low"') do set /a %%a 

set top
set low
echo %top%, %low%

回答3:

Try this:

for /F "tokens=2delims==" %%a in ('findstr top file.txt') do set "updir=%%a"
echo.%updir%

According to your comment my new code:

@echo off &setlocal enabledelayedexpansion
set "string=%%I"
set "string=!string:*top=!"
for /f "delims== " %%z in ("!string!") do set "string=%%z"
echo !string!

.. output:

123456789

Edit2: "added.

来源：https://stackoverflow.com/questions/15493297/parse-batch-line-by-line