bookwyrm: improve cache bypass detection

bookwyrm/nginx.conf

@@ -20,16 +20,6 @@ server {
     client_body_buffer_size     10M;
     client_max_body_size        10M;
 
-    set $skip_cache 0;
-    if ($request_method = POST) {
-        set $skip_cache 1;
-    }
-
-    if ($http_cookie ~* "session") {
-        set $skip_cache 1;
-    }
-
-
     location ~ ^/(login[^-/]|password-reset|resend-link|2fa-check) {
         limit_req zone=loginlimit;
 
@@ -50,12 +40,13 @@ server {
     location / {
         proxy_cache mycache;
         add_header X-Cache-Status $upstream_cache_status;
-        proxy_ignore_headers Cache-Control Set-Cookie;
+        proxy_ignore_headers Cache-Control Set-Cookie Expires;
         #proxy_ignore_headers Cache-Control;
 
-	# logged in sessions and other reasons to bypass the cache
-	proxy_no_cache      $skip_cache;
-	proxy_cache_bypass  $skip_cache;
+	# logged in sessions and PUT bypass the cache
+	proxy_cache_methods GET HEAD;
+	proxy_no_cache      $cookie_session;
+	proxy_cache_bypass  $cookie_session;
   
         proxy_cache_valid any 1m;
 
@@ -67,12 +58,12 @@ server {
 
     location /images/ {
         alias /bookwyrm/app/images/;
-        access_log off;
+        #access_log off;
     }
 
     location /static/ {
         alias /bookwyrm/app/static/;
-        access_log off;
+        #access_log off;
     }
 
     include /etc/nginx/includes/ssl.conf;