configuration - Nginx server config optimisation using image_filter and proxy_cache -


i have nginx server config file below setup , working fine, wondered if there way of optimising there isn't repetition proxy settings.

i want restrict resizing can done specific pre-set dimensions, rather allowing /resized/200x100/image.jpg example.

i'm serving these images via ghost, can prepend or append url. 

upstream backend {     server domain.name; }  proxy_cache_path /var/www/cache/resized levels=1:2 keys_zone=resizedimages:10m max_size=1g;  server {     listen 80;      root /var/www/domain/source;      server_name domain.name;      image_filter_buffer 10m;     image_filter_jpeg_quality 85;      proxy_store_access user:rw group:rw all:rw;      location / {         proxy_pass http://127.0.0.1:2368;          proxy_redirect off;     }      location ~ /resize/xs/(.*) {         proxy_pass http://backend/$1;          proxy_cache resizedimages;         proxy_cache_valid 200 1d;         proxy_cache_valid 1m;         proxy_cache_use_stale error timeout invalid_header updating;          image_filter resize 320 -;     }      location ~ /resize/xs@2x/(.*) {         proxy_pass http://backend/$1;          proxy_cache resizedimages;         proxy_cache_valid 200 1d;         proxy_cache_valid 1m;         proxy_cache_use_stale error timeout invalid_header updating;          image_filter resize 480 -;         image_filter_jpeg_quality 65;     }      location ~ /resize/sm/(.*) {         proxy_pass http://backend/$1;          proxy_cache resizedimages;         proxy_cache_valid 200 1d;         proxy_cache_valid 1m;         proxy_cache_use_stale error timeout invalid_header updating;          image_filter resize 480 -;     }      location ~ /resize/sm@2x/(.*) {         proxy_pass http://backend/$1;          proxy_cache resizedimages;         proxy_cache_valid 200 1d;         proxy_cache_valid 1m;         proxy_cache_use_stale error timeout invalid_header updating;          image_filter resize 720 -;         image_filter_jpeg_quality 65;     }      # md, m@2x, etc.      location ~ /resized/(sq/xs|sq/md|xs|xs@2x|sm|sm@2x|md|md@2x|lg|lg@2x|xl|xl@2x)/(.*) {         try_files /resize$1/$2 @img;     }      location @img {         proxy_pass http://backend/resize/$1/$2;         proxy_store /var/www/domain/cache/$1/$2;     } }


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