Regex: Find usename inside a url

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I'm struggling with creating the correct REGEX pattern to find a username string in the middle of a url. In short, I'm working in Powershell and pulling down a webpage and scraping out the "li" elements. I write this to a file so I have a bunch of lines like this:

<LI><A HREF="/grouplist/expand-user/jimmysmith">Smith, Jimmy</A>&nbsp;

The string I need is the "jimmysmith" part, and every line will have a different username, no longer than eight alpha characters. My current pattern is this:

(<(.|\n)+?>)|(&nbsp;) 

and I can use a "-replace $pattern" in my code to grab the "Smith, Jimmy" part. I have no idea what I'm doing, and any success in getting what I did get was face-roll-luck.

After using several online regex helpers I'm still stuck on how to just get the "string after the third "/" and up-to but not including the last quote.

Thank you for any assistance you can give me.

Try the following regex:

[^\/"]+(?=">.*<\/A>)

This wll capture the last string in href attribute of <a> tag.

regex: URL thingy with username, password, host and port – info , password, host and port. July 7, 2008 by Michael. Just in case i do keep forgetting that stuff, here's a regex for decoding urls like ftp://user:somepass@​somehost:someport. in Java: Integer.parseInt(m.group(6)) : portMap.get(​protocol);  MAC OSX, PowerShell 6.1 Core. I'm struggling with creating the correct REGEX pattern to find a username string in the middle of a url. In short, I'm working in Powershell Core 6.1 and pulling down a webpage and scraping out the "li" elements.

I suggest you use an HTML parser instead. Try:

$html = New-Object -ComObject "HTMLFile"
$source = '<LI><A HREF="/grouplist/expand-user/jimmysmith">Smith, Jimmy</A>&nbsp;'
$html.IHTMLDocument2_write($source)
$html.links | % nameprop

jimmysmith

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Just simply to replace redundant strings.

'<LI><A HREF="/grouplist/expand-user/jimmysmith">Smith, Jimmy</A>&nbsp;' -replace ".*user/|`"\>.*"

If you have multiple lines, try this:

'<LI><A HREF="/grouplist/expand-user/jimmysmith">Smith, Jimmy</A>&nbsp;' -replace "^\<LI.*user/|`"\>.*"

Both work, tested.

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The answer to my question, was contained in this response by Sergio.

Try the following regex:

[^\/"]+(?=">.*<\/A>)

This will capture the last string in href attribute of <a> tag.

In search of the perfect URL validation regex, for a decent regular expression to validate URLs that were entered as user input with. In real-world usage, this modifier can be omitted. Here's a plain text list of all the URLs used in the test. These URLs should match ( 1 → correct) )+(aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|​org|  Honestly I always have to refer to the documentation or to past projects I’ve developed, just to grab the regex I need. So that’s why I thought about creating this post, to serve as a reference guide for common urls.

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lorey/social-media-profiles-regexs: Regular expressions for , This repository lists regular expressions to match and extract URLs of social 7 months ago #11 Regexes that filter username part from the regex Opened by part and www(host Name) in regex Opened by AKArunkumar almost 2 years ago. To find the URLs in a given string we have used the findall() function from the regular expression module of Python. This return all non-overlapping matches of pattern in string, as a list of strings. The string is scanned left-to-right, and matches are returned in the order found.

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Comments
  • ($html.links | select nameprop).nameprop also
  • I'd suggest using the term "html parser" since parsing html with regex is a terrible idea. Also: $html.links.nameprop is equivalent to what you wrote.
  • @TheIncorrigible1 For some reason that didn't work for me, and I wasn't sure why. It should be equivalent but it wasn't returning data for me.
  • Which version of PS? Automatic enumeration wasn't added until v3. Alternative to what you wrote, I'd use |% nameprop (which is equivalent to | ForEach-Object -MemberName 'nameprop')
  • @TheIncorrigible1 I'm using 5.1 - I like that method though, I'll edit. It's a lot cleaner.
  • I've also tested and this works. I will use this answer. Thank you.
  • Don't use double quotes if you're not using any string expansion and you don't need escape characters.
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