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Regular expression to check for a URL's protocol

Tags:

regex

Currently using:

@"^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&amp;%\$#_]*)?$

How can i make http:// not compulsory but if it does exist, it must be written as http://

like image

223

asked Jul 19 '10 13:07

maztt

1 Answers

Replace

^(ht|f)tp(s?)\:\/\/

by

^(?:(ht|f)tp(s?)\:\/\/)?

like image

59

answered Oct 21 '22 09:10

Jens

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