Three basic rules for URL regex:
- ? matches one character.
- * matches zero or more characters.
- ** matches zero or more 'directories' in a path.
An asterisk ('*')
matches zero or more characters, up to the occurrence of a '/' character (which
serves as a path separator).
A string, such as
"/abcd/docs/index.html", would not match successfully against
the pattern '/*/*.index.html'. The first asterisk matches up to the first path
separator only, resulting in the "abcd" string. A successful matching
pattern would be '/*/*/*.html'.
A string containing
two asterisks ('**') matches zero or more characters.
This could include
the path separator '/'. In this case, "/abcd/docs/index.html"
would successfully match the '/**/*.html' pattern. The double asterisk,
including the path separator, would match the "abcd/docs" string.
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