strings.extract_subdomains

Supported in:

Rules Search

strings.extract_subdomains(url_string)

Description

Extracts all subdomains found in a URL string.

Param data types

STRING

Return type

ARRAY_STRINGS

Code samples

Example 1

This example shows how to extract the subdomains from a URL string.

strings.extract_subdomains("www.sub1.sub2.google.com") = ["www", "sub1", "sub2"]

Example 2

This example shows how to extract subdomains when using non ASCII characters.

strings.extract_subdomains("http://例子.卷筒纸.中国") = ["例子"]

Example 3

This example shows handling of a non URL string.

strings.extract_subdomains("three nine four") = []

Example 4

This example shows handling of an unregistered domain.

strings.extract_subdomains("http://localhost:80") = []

Example 5

This example shows handling of a multi part suffix.

strings.extract_subdomains("    www.Example.Co.UK    ") = ["www"]