Regular Expressions 101

ETagthe literal text ETag (case sensitive)

\s+any whitespace character, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sany whitespace character

Group 1([0-9a-z-]+)

Character Class[0-9a-z-]+

+matches at least one character from the set below:

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

ETag\s+:\s([0-9a-z-]+)

Test String
New

Name      : voip_asterisk.gif
Date      : 2019-08-12 17:37:20 +0430
Size      : 4.3 KiB
ETag      : aa28b23fe87c20761b137965f93b8bea-1
Type      : file
Metadata  :
  Content-Type         : image/gif
  X-Minio-Deployment-Id: 19531601-d904-401a-9ffe-57e85a0d91a1

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...