Friendly Blog Url Isapi Rewrite Regex

Question

My regex isn't great, and I'm struggling here. I need regex to get title from these 2 formats:

http://domain.com/blog/title
http://secure.com/domainkey/blog/title

but not match anything from (where subfolders could be multiple):

http://domain.com/images/blog/imagename
http://domain.com/images/subfolders/blog/imagename
http://secure.com/domain/images/blog/imagename
http://secure.com/domain/images/subfolders/blog/imagename

Any ideas? Thanks.

Answer 1

(http:\/\/(?:(?:secure.com\/domainkey)|(?:domain.com))\/blog\/)([\w-]+)

capture two parts:

1. base url, http://domain.com/blog/ or http://secure.com/domainkey/blog/
2. the title

demo with js:

var regex = /(http:\/\/(?:(?:secure.com\/domainkey)|(?:domain.com))\/blog\/)([\w-]+)/ig;

regex.exec('http://domain.com/blog/blog-title');
// results: ["http://domain.com/blog/blog-title", "http://domain.com/blog/", "blog-title"]

regex.exec('http://secure.com/domainkey/blog/blog-title')
// results: ["http://secure.com/domainkey/blog/blog-title", "http://secure.com/domainkey/blog/", "blog-title"]

assumed that blog title only contains [a-zA-Z_-], if you have more characters to capture, please modify the last part of the regex.