Keep a copy of long running web responses

config/root/etc/nginx/nginx.conf

@@ -50,6 +50,14 @@ http {
     gzip_http_version 1.1;
     gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
 
+    # Caching proxy requests
+    proxy_cache_lock on;
+    proxy_cache_use_stale updating;
+    # temporary files in shared memory
+    proxy_temp_path /dev/shm/nginx/tmp 1;
+    # change this to /config/cache/nginx for a persistent cache
+    proxy_cache_path /dev/shm/nginx/cache levels=1:2:2 keys_zone=gunicorn:4m inactive=48h max_size=256m min_free=16m;
+    
     # X-Forwarded-Host (pass-through, or set)
     map $http_x_forwarded_host $x_forwarded_host {
         default $http_x_forwarded_host;
@@ -110,9 +118,14 @@ http {
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_redirect off;
+
             # this read timeout should be lower than gunicorn's timeout
             proxy_read_timeout 89s;
             proxy_connect_timeout 10s;
+
+            # cache long running web requests
+            proxy_cache gunicorn;
+            proxy_cache_lock_timeout 88s;
         }
 
         # File dwnload and streaming