allow options to cors server

Author: akoidan

rootfs/etc/nginx/sites-enabled/pychat.conf

@@ -20,22 +20,35 @@ server {
     gzip_comp_level 6;
     gzip_buffers 16 8k;
     gzip_http_version 1.1;
+
     location /photo  {
-         alias /srv/http/pychat/backend/photos;
-         add_header Access-Control-Allow-Origin https://pychat.org;
+        alias /srv/http/pychat/backend/photos;
+        add_header Access-Control-Allow-Origin https://pychat.org;
+        add_header Access-Control-Allow-Headers Range;
+        if ($request_method = 'OPTIONS') {
+            return 204;
+        }
     }
 
     location ~ "^/photo/(?<filepath>\w{8}_(?<filename>.*))$"  {
         add_header Content-Disposition 'inline; filename="$filename"';
         alias /srv/http/pychat/backend/photos/$filepath;
         add_header Access-Control-Allow-Origin https://pychat.org;
+        add_header Access-Control-Allow-Headers Range;
+        if ($request_method = 'OPTIONS') {
+            return 204;
+        }
     }
 
     root /srv/http/pychat/frontend/dist/;
 
     location / {
         try_files $uri /index.html;
         add_header Access-Control-Allow-Origin https://pychat.org;
+        add_header Access-Control-Allow-Headers Range;
+        if ($request_method = 'OPTIONS') {
+            return 204;
+        }
     }
 
     ssl_certificate /etc/letsencrypt/live/static.pychat.org/fullchain.pem; # managed by Certbot