Regex to test if string begins with http:// or https://

Question

I\'m trying to set a regexp which will check the start of a string, and if it contains either http:// or https:// it should match it.

How c

Answer 1

Making this case insensitive wasn't working in asp.net so I just specified each of the letters.

Here's what I had to do to get it working in an asp.net RegularExpressionValidator:

[Hh][Tt][Tt][Pp][Ss]?://(.*)

Notes:

• (?i) and using /whatever/i didn't work probably because javascript hasn't brought in all case sensitive functionality
• Originally had ^ at beginning but it didn't matter, but the (.*) did (Expression didn't work without (.*) but did work without ^)
• Didn't need to escape the // though might be a good idea.

Here's the full RegularExpressionValidator if you need it: