Forum Moderators: phranque
I need some help.
I have a directory
/pics which has full image size pictures
and
/pics/thumbs which contain thumbnails
All the thumbnail files start with t_ prefix
for it is
t_picture1.jpg
t_picture2.jpg
In the /pics (non thumbnail), it is the same file name, but without the t_ prefix
Sometimes thumbnails are missing
When they are missing, i am trying to redirect any request to the /pics full picture directory to use the picture from the /pics directory (same filename but without the t_)
The problem I am having is I am not sure how to strip out the t_ (ie: missing /pics/thumbs/t_picture1.jpg missing should point to /pics/picture1.jpg)[notice no t_ in /pics]
What I have come up with
Options +FollowSymLinks
RewriteEngine on
#RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^pics/thumbs/+[^_]\.jpg$ [domain...] [R=301, R]
using -f to come on only when the file does not exist.
I think the first part is right searching for /pics/thumbs/+ any file name which is .jpg but how I strip - 't_' out from the string $1 taking out t_
also, does the code above look correct?
thank you
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^pics/thumbs/t_([^.]+)\.jpg$ http://example.com/pics/$1.jpg [R=301,L]
() = Store for back-reference.
+ = 1 or more of the preceding pattern.
[^.] = Is Not a . (dot)
So, the above matches pics/thumbs/t_ANYTHING-EXCEPT-A-DOT.jgp
[R=NUM] = Sets the Redirect, and defines it as permanent with the NUM 301.
[L] = Last. (Should always be used unless you have a specific reason to not use it.)
Personally, I would probably serve the file from the other location internally, rather than forcing the browser to make a new request:
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^pics/thumbs/t_([^.]+)\.jpg$ /pics/$1.jpg [L]
By removing the absolute URL and the R=NUM flag, you can serve the file from the other directory 'internally' without needing the browser to make a new request from the other location.
