regex101: Support metrics.agent.grafana.com/path or prometheus.io/path with or without K/V pairs for multiple ports

^start of line

Group 1([^;,\n]*)

Negated Character Class[^;,\n]*

*matches any number of characters outside the set below:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

Group 2(;.*\b\1\b=|;.*;|;)

1st Alternative;.*\b\1\b=

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

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

\ban ASCII word boundary

\1the text saved by group 1

\ban ASCII word boundary

=the literal = (61₁₀ / 75₈ / 3D₁₆)

2nd Alternative;.*;

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

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

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

3rd Alternative;

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Group 3([^;=,\n]+)

Negated Character Class[^;=,\n]+

+matches at least one character outside the set below:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

Group 4(,.*|;)?

?repeats the group contents below at most once:

1st Alternative,.*

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

2nd Alternative;

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

$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

^([^;,\n]*)(;.*\b\1\b=|;.*;|;)([^;=,\n]+)(,.*|;)?$

Test String
New

# with k/v pairs declared
http-metrics;http-metrics=/~/healthy;
http-metrics;http-metrics=/~/read;
http-metrics;http-metrics=/ping,http-service=/ping,proxy-test=/proxy
http-service;http-metrics=/ping2,http-service=/ping
http-service;http-metrics=/ping2,http-test=/ping
http-metrics;;http-metrics=/~/healthy
http-metrics;http-metrics=/~/read;
http-metrics;;http-service=/ping
http-metrics;;/ping
http-metrics;/ping;
;;/~/healthy
;/~/healthy;

Regular Expressions 101

Regular Expression

Test String
New

Extraction
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Regular Expression

Test StringNew

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Test String
New

Extraction
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