varnish split url and change url - regex

Question

Is there a way to split url on varnish or change url structure with it.
I know regsub or regsuball support that but they are not enough in my case.
I would like to change a url and redirect it to another domain.
For example:
http://aaa.test.com/sport/99244-article-hyun-jun-suku-kapa.html?
to redirect below address
http://m.test.com/article-hyun-jun-suku-kapa-sport-99244/
I added some lines in vcl file to do that
set req.http.xrul=regsuball(req.url,".html",""); "clear .html"
set req.http.xrul=regsub(req.http.xrul,"(\d+)","\1"); find numbers --article ID =99244
I can rid of the article ID with
set req.http.xrul=regsub(req.http.xrul,"(\d+)","");
but cannot get just only article ID
set req.http.xrul=regsub(req.http.xrul,"(\d+)","\1"); or any other method
Does varnish support split the url with "-" pattern thus I could redesign the url? Or can we get only articleID with regsub?

Answer 1

Is this what you want to achieve?
set req.http.X-Redirect-URL = regsuball(req.url,"^/([^/]*)/([0-9]+)-([^/]+)\.html$","http://m.test.com/\3-\1-\2");
This is working code tailored to example you provided, just one level of section placement.
If you want to support more levels of sections, you only have to adjust regexp a bit and replace / to - in second step:
set req.http.X-Redirect-URL = "http://m.test.com/" + regsuball(regsuball(req.url, "^/(.*)/([0-9]+)-([^/]+)\.html$", "\3-\1-\2"), "/", "-");
Maybe you need one more refinement. What if URL doesn't match you pattern? X-Redirect-URL will be the very same value as req.url is. You definitely don't want redirect loop, so I suggest to add mark character to the begin of X-Redirect-URL and then test for it.
Let's say:
set req.http.X-Redirect-URL = regsuball(regsuball(req.url, "^/(.*)/([0-9]+)-([^/]+)\.html$", "#\3-\1-\2"), "/", "-");
if(req.http.X-Redirect-URL ~ "^#") {
set req.http.X-Redirect-URL = regsuball(req.http.X-Redirect-URL, "#", "http://m.test.com/");
return(synth(391));
} else {
unset req.http.X-Redirect-URL;
}
and for all cases, you need in vcl_synth:
if (resp.status == 391) {
set resp.status = 301;
set resp.http.Location = req.http.X-Redirect-URL;
return (deliver);
}
Hope this helps.