Extracting url from a string with regex and Powershell

Question

I'm using powershell and regex. I'm scraping a web page result to a variable, but I can't seem to extract a generated url from that variable.

this is the content (the actual url varies):

&quot;https://api16-something-c-text.sitename.com/aweme/v2/going/?video_id=v12044gd0666c8ohtdbc77u5ov2cqqd0&amp;

$reg = "([^&]*)&;$" always returns false.

I've been trying -match and Select-String with regex but I'm in need of guidance.

Place amp before ;$

Darin
– Darin

2022-04-08 21:34:23 +00:00
Commented Apr 8, 2022 at 21:34 — Darin
– Darin, Commented Apr 8, 2022 at 21:34

mklement0 · Accepted Answer · 2022-04-08 22:33:23Z

1

I suggest using a -replace operation:

$str = '&quot;https://api16-something-c-text.sitename.com/aweme/v2/going/?video_id=v12044gd0666c8ohtdbc77u5ov2cqqd0&amp;' 

$str -replace '^&quot;(.+)&amp;$', '$1'

answered Apr 8, 2022 at 22:33

mklement0

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another victim of the mouse · Accepted Answer · 2022-04-09 20:26:05Z

0

It really depends on what format the content is in.

(?<=\") looks behind "&quot" for (.*?) which any numbers of non-newline characters and then looks ahead for (?=\&) which is "&".

Here's a fair start:

$pattern = "(?<=\&quot;)(.*?)(?=\&amp;)"
$someText = "&quot;https://api16-something-c-text.sitename.com/aweme/v2/going/?video_id=v12044gd0666c8ohtdbc77u5ov2cqqd0&amp;"
$newText = [regex]::match($someText, $pattern)
$newText.Value

Returns:

https://api16-something-c-text.sitename.com/aweme/v2/going/?video_id=v12044gd0666c8ohtdbc77u5ov2cqqd0

edited Apr 9, 2022 at 20:26

answered Apr 8, 2022 at 21:52

another victim of the mouse

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