RegEx for setting IMG src = ""

Question

I have raw HTML and I need to set all IMG src="http://foo".

This is the RegEx I have so far, and it seems to work. In my environment, it is safe to assume that tags are uppercase and attributes are lowercase. I am doing this in .Net, but I don't think that the platform really matters here. \s is any whitespace in the .Net RegEx engine.

Can anybody improve on it?

Regex.Replace(htmlText, "(<IMG[^>]*\\ssrc=\")([^\"]*)(\"[^>]*>)", "$1http://foo$3")

Answer 1

Maybe allow for multiple spaces with \s+

Answer 2

not a regexpert by any means, but try txt2re.com

maybe this will get you started: http://txt2re.com/index-ruby.php3?s=%3CIMG%20src=%22http://foo.bar/baz.jpg%22%20/%3E&1

Answer 3

Match the entire IMG tag first, and then match the src="([^\"]*)" attribute, replacing it, giving you a replacement string for the src="..." part only.

You can then use the original match, and search for the whole tag, and replace it with this whole tag.