Regular Expressions 101

Validates subdomain, root domain, and wild card domains

Extract URL parts only named capturing groups

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want

Aquivalent solution for golang's unsupported negative lookahead in re2 flavor of go's regex. This example provides a negative lookahead similar to (?!/api/) ignoring routes with the /api/ prefix at the start.

Matching for mikrotik ROS 7 Used in promtail and grafana

Simple prefix matcher for validating URI Schemes according to [RFC2396, Section 3.1]( http://www.faqs.org/rfcs/rfc2396.html#3.5:~:text=well%20as%20%22http%22%29.-,scheme%20%20%20%20%20%20%20%20%3D%20alpha%20*%28%20alpha%20%7C%20digit%20%7C%20%22%2B%22%20%7C%20%22%2D%22%20%7C%20%22.%22%20%29,-Relativ...

nginx access log regex

11

Used by Zarf to obtain the name of a repository when given a git URL.

Testing Authelia subdomain / path rules. You can read more at the Authelia Docs By default, this regex101 page is shown a test for a generic API path domain: "some-sub.drpranavmishra.com" resources:...

see https://stackoverflow.com/questions/76228402/regex-to-extract-n-where-n-is-digit

Dj dus er geen je een je aan je enige eerst een he we er

0x28C6A6DdF8fF8A47A90A69bfE75cd89904a14d71

Kafka loki parser

Splits a Docker image string into the separate parts: image, tag, digest tag and digest are optional

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This is made to validate an ISO 8601 input in a Terraform variable validation block: validation { condition = can(regex("^P(\\d+Y)?(\\d+M)?(\\d+D)?(T(\\d+H)?(\\d+M)?(\\d+S)?)?$", var.value)) error_message = "The value must be a valid ISO 8601 duration string representing time. (e.g. PT...

Simple Regex to *validate * (no extraction!) an IPv4 Range which can be a comma separated mixture of IPv4 addresses IPv4 CIDRs IPv4 Ranges like 1.1.1.1-1.1.1.10 Examples : ...

regex of challenge

Parse the typical connection string address like 123.123.123.123:123, supports the correct port and octet range