Method pathname.getUrlProtocolLength

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Overload

Gets the length of the URL protocol name (also known as URI scheme) in string, including ':'. If the string does not start with a protocol name, returns 0.

public static int getUrlProtocolLength(ReadOnlySpan<char> s)

Parameters

s  (ReadOnlySpan<char>) A URL or path or any string. Can be null.

Returns

int

Remarks

URL examples: "http:" (returns 5), "http://www.x.com" (returns 5), "file:///path" (returns 5), "shell:etc" (returns 6).

The protocol can be unknown. The function just checks string format, which is an ASCII alpha character followed by one or more ASCII alpha-numeric, '.', '-', '+' characters, followed by ':' character.