rewrite scheme for url redirect

[António P. P. Almeida]

On 26 Jan 2011 21h11 WET, nginx-forum at nginx.us wrote:

> I'm going crazy with this since I can't get it working in any way...
>
> I have a subdomain on a server, let's call it images.site1.com,
> dedicated to serve images. Due to some bandwidth limitation i got a
> more capable server so the webpages will remain on site1.com but the
> images will be moved to images.site2.com
>
> Since I had to change the names of images folders on the new server
> now I need to rewrite the urls in order to fit my needs. Only the
> webserver on site1.com runs NginX, so i need to do rewrite the
> original ruls following a regular expression (regex) and do
> something like:
>
> http://images.site1.com/oldfolderjpg/123456_1.jpg --rewrite-->
> http://images.site2.com/newfolderjpg/12/34/new_images/123456/123456_image_1_large.jpg
>
> - The first and most logic rewrite scheme I tought about is:
>
> rewrite
> ^/oldfolder/([0-9][0-9])([0-9][0-9])([0-9][0-9])_([0-9]).jpg$
> http://images.site2.com/newfolder/$1/$2/new_images/$1$2$3/$1$2$3_image_$4_large.jpg
> permanent

On images.site1.com config try this:

location /oldfolder {
   rewrite ^/oldfolder/(\d{2})(\d{2})(\d{2})_(\d)\.jpg$
http://images.site2.com/newfolder/$1/$2/new_images/$1$2$3/$1$2$3_image_$4_large.jpg? permanent;
}

--- appa