Help in Regex

[JM]

I have a URL which can have multiple "http://" value in it like:

http://us.rd.yahoo.com/dailynews/rs.../s/nm/20060712/bs_nm/arms_halliburton_iraq_dc

I want to extract
"http://us.rd.yahoo.com/dailynews/rss/business/*http://news.yahoo.com/"
out of the above. i.e. the URL Hostname upto last http.

Can anybody help me in getting the Regex expression for this?

Thanks
JM

 

[Mr Flibble]

I have a URL which can have multiple "http://" value in it like:

http://us.rd.yahoo.com/dailynews/rs.../s/nm/20060712/bs_nm/arms_halliburton_iraq_dc

^http\:\//.*http\:\//*\.*\.*\/

Will match the URL but you will then have to use String.Replace to strip
the remainder of the secondary URL.

 

[JM]

Thanks for quick reply...
I will do replace for the remaining part of secondary URL to get the
hostname.

Regards
JM

 

[Kevin Spencer]

(http://).*\1[^/]*/

This does it without any additional work, and a bit more succinctly. It uses
a group and a backreference to grab the string up to the second "http" and
then indicates that any non-'/' character is a match. Finally, it matches
the next '/' character.

No character escapes are necessary, as the slashes are forward-slashes.

--
HTH,

Kevin Spencer
Microsoft MVP
Professional Chicken Salad Alchemist

What You Seek Is What You Get.