Batch file 将文本文件中一行的子字符串存储到单独的文本文件中

我有一个包含5行的文件：

Resolving portal... ip_address
Connecting to portal|ip_address|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://portal1.com/portal [following]
Connecting to portal1.com|ip_address|:80... connected.

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如何使用批处理脚本保存字符串

http://portal1.com/

（第4行）到名为url.txt的文本文件？

这是您想要的：

for /f "tokens=2 delims=/" %%a in ('findstr /L "Location:" lines.txt') do echo http://%%a/ > url.txt

注意：您必须用文本文件的正确名称替换

lines.txt

这应该有效：

@ECHO OFF
SETLOCAL enabledelayedexpansion
FOR /F "tokens=*" %%a IN (yourtextfile.txt) DO (
    SET line=%%a
    IF "!line:~0,10!"=="Location: " SET location=%%a
)
FOR /F "tokens=2 delims=/" %%l IN ("%location%") DO (
    ECHO http://%%l/ > url.txt
)

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批处理文件在哪里运行？