Regular Expressions 101

Explanation

Pro

Group scheme(?<scheme>https?|s?ftp|wss?|git)

1st Alternativehttps?

httpthe literal text http (case sensitive)

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

2nd Alternatives?ftp

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

ftpthe literal text ftp (case sensitive)

3rd Alternativewss?

wsthe literal text ws (case sensitive)

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

4th Alternativegit

gitthe literal text git (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group subDomain(?<subDomain>[a-z0-9-]{1,63}\.(?:[a-z0-9-]{1,63}\.)*)?

?repeats the group contents below at most once:

Character Class[a-z0-9-]{1,63}

{1,63}matches between 1 and 63 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[a-z0-9-]{1,63}\.)*

*repeats the group contents below any number of times:

Character Class[a-z0-9-]{1,63}

{1,63}matches between 1 and 63 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group domain(?<domain>[a-z0-9-]{1,256})

Character Class[a-z0-9-]{1,256}

{1,256}matches between 1 and 256 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group tld(?<tld>[a-z0-9]+)

Character Class[a-z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?::(?<port>[0-9]{1,5}))?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group port(?<port>[0-9]{1,5})

Character Class[0-9]{1,5}

{1,5}matches between 1 and 5 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group path(?<path>\/.*/?)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.*any character (except for line terminators), repeated any number of times

/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Unit Test Summary

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Quick Reference

27 tokens

Regular Expression

(?<scheme>https?|s?ftp|wss?|git):\/\/(?<subDomain>[a-z0-9-]{1,63}\.(?:[a-z0-9-]{1,63}\.)*)?(?<domain>[a-z0-9-]{1,256})[.](?<tld>[a-z0-9]+)(?::(?<port>[0-9]{1,5}))?(?<path>\/.*/?)?

Unit Tests

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