regex101: ListOfSourcesSeparatedBySpaces

^start of line

Group 1((?'isolated_keywords'('none')|(deny))|((?'single'(?'just_scheme'[a-z]+\:)|(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)|('self')|(sameorigin))(?'list'((?'list_separator'\ )(?'list_content'(?'just_scheme_in_list'[a-z]+\:)|(?'uri_in_list'(?'scheme_in_list'[a-z]+\:(?'scheme_separator_in_list'\/\/)?)?(?'host_in_list'[a-z0-9\-*]+\.[a-z0-9\-*.]+)?(?'port_in_list':[0-9*]+)?)))+)?))

1st Alternative(?'isolated_keywords'('none')|(deny))

Group isolated_keywords(?'isolated_keywords'('none')|(deny))

1st Alternative('none')

Group 3('none')

'none'the literal text 'none' (case sensitive)

2nd Alternative(deny)

Group 4(deny)

denythe literal text deny (case sensitive)

2nd Alternative((?'single'(?'just_scheme'[a-z]+\:)|(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)|('self')|(sameorigin))(?'list'((?'list_separator'\ )(?'list_content'(?'just_scheme_in_list'[a-z]+\:)|(?'uri_in_list'(?'scheme_in_list'[a-z]+\:(?'scheme_separator_in_list'\/\/)?)?(?'host_in_list'[a-z0-9\-*]+\.[a-z0-9\-*.]+)?(?'port_in_list':[0-9*]+)?)))+)?)

Group 5((?'single'(?'just_scheme'[a-z]+\:)|(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)|('self')|(sameorigin))(?'list'((?'list_separator'\ )(?'list_content'(?'just_scheme_in_list'[a-z]+\:)|(?'uri_in_list'(?'scheme_in_list'[a-z]+\:(?'scheme_separator_in_list'\/\/)?)?(?'host_in_list'[a-z0-9\-*]+\.[a-z0-9\-*.]+)?(?'port_in_list':[0-9*]+)?)))+)?)

Group single(?'single'(?'just_scheme'[a-z]+\:)|(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)|('self')|(sameorigin))

1st Alternative(?'just_scheme'[a-z]+\:)

Group just_scheme(?'just_scheme'[a-z]+\:)

Character Class[a-z]+

+matches at least one character from the set below:

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

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)

Group uri(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)

Group scheme(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?

?repeats the group contents below at most once:

Character Class[a-z]+

+matches at least one character from the set below:

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

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group scheme_separator(?'scheme_separator'\/\/)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group host(?'host'[a-z0-9\-*]+\.[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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group port(?'port':[0-9*]+)?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-9*]+

+matches at least one character from the set below:

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

*the literal * (42₁₀ / 52₈ / 2A₁₆)

3rd Alternative('self')

Group 13('self')

'self'the literal text 'self' (case sensitive)

4th Alternative(sameorigin)

Group list(?'list'((?'list_separator'\ )(?'list_content'(?'just_scheme_in_list'[a-z]+\:)|(?'uri_in_list'(?'scheme_in_list'[a-z]+\:(?'scheme_separator_in_list'\/\/)?)?(?'host_in_list'[a-z0-9\-*]+\.[a-z0-9\-*.]+)?(?'port_in_list':[0-9*]+)?)))+)?

$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

^((?'isolated_keywords'('none')|(deny))|((?'single'(?'just_scheme'[a-z]+\:)|(?'uri'(?'scheme'[a-z]+\:(?'scheme_separator'\/\/)?)?(?'host'[a-z0-9\-*]+\.[a-z0-9\-*.]+)(?'port':[0-9*]+)?)|('self')|(sameorigin))(?'list'((?'list_separator'\ )(?'list_content'(?'just_scheme_in_list'[a-z]+\:)|(?'uri_in_list'(?'scheme_in_list'[a-z]+\:(?'scheme_separator_in_list'\/\/)?)?(?'host_in_list'[a-z0-9\-*]+\.[a-z0-9\-*.]+)?(?'port_in_list':[0-9*]+)?)))+)?))$

New

'self'
sameorigin plus.some.host