regex101: Match all filenames in any URL including those with ANSI escaped characters (dotNET version)

Positive Lookbehind(?<=https?:\/\/\S*(?:[=\/]|%2F))

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\S*any character that is not Unicode whitespace, repeated any number of times

Non-Capturing Group(?:[=\/]|%2F)

1st Alternative[=\/]

Character Class[=\/]

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative%2F

%2Fthe literal text %2F (case sensitive)

Non-Capturing Group(?:(?!%2F)[^?&\s\/])+

+repeats the group contents below at least once:

Negative Lookahead(?!%2F)

%2Fthe literal text %2F (case sensitive)

Negated Character Class[^?&\s\/]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

\sa Unicode whitespace character

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w+a Unicode word character, repeated at least once

Positive Lookahead(?=[?&]|$)

1st Alternative[?&]

Character Class[?&]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

2nd Alternative$

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(?<=https?:\/\/\S*(?:[=\/]|%2F))(?:(?!%2F)[^?&\s\/])+\.\w+(?=[?&]|$)

New

https://www.contoso.com/sites/marketing/documents/Shared%20Documents/Forms/AllItemA.aspx?RootFolder=%2Fsites%2Fmarketing%2Fdocuments%2FShared%20Documents%2FPFProduct%20Promotion%202001.docx&FolderCTID=0x012000F2A09653197F4F4F919923797C42ADEC&View=%7BCD527605-9A7A-448D-9A35-67A33EF9F766%7D

https://content.com/pbpython.py/notebooks/thirsty-allies.mov?file=The%20Big%20Kahuna.webm.tar.gz&f=Crosstab%20Explained.ipynb&a=b&m=plok%202001.tar.gz

https://www.bettiolo.com/custom/1/tools/Utilità%20per%20il%20programmatore%20Web/URL%20Encoding%20-%20Lista%20caratteri.asp