Mastodawn

Just lost several hours of my life to silly CORS issues while setting up https://static-s.umeyashiki.org as my Akkoma media base URL

Nginx “gotcha”: header inheritance.

If you put an add_header directive inside a location block, it completely suppresses all add_header directives defined in the parent server block.

server {
    add_header "X-Hdr-A" "Value";
    add_header "X-Hdr-B" "Value";

    location / {
        add_header "X-Hdr-C" "Value"; # <-- This wipes out A and B!
        access_log /var/log/a.log;
    }

    location /bb {
        access_log /var/log/b.log; # <-- A and B will show up here just fine.
    }
}

If your global headers are mysteriously disappearing on certain paths, maybe check your location blocks.

#http #nginx #cors #akkoma