NGINX: map and try_files not working
Solution 1:
The try_files statement is using numeric captures from the regular expression in the location statement. The problem with numeric captures is that they are overwritten whenever a regular expression is evaluated. The map contains a regular expression that is evaluated between the location and the try_files statements.
The solution is to use named captures:
For example:
location ~ ^/imgs/(?<prefix>[0-9]*)/(.*?)(?<suffix>\..+)$ {
add_header X-webp $webp_suffix;
try_files /imgs/$prefix$webp_suffix /imgs/$prefix$suffix =404;
}