Add test script for large file asynchronous post-processing

- Implemented a comprehensive test script to validate the new asynchronous handling of large file uploads (>1GB).
- The script checks for immediate HTTP responses, verifies server configurations for deduplication and virus scanning, and ensures server responsiveness during rapid uploads.
- Included checks for relevant response headers and session tracking.
- Documented the problem being solved, implementation details, and next steps for deployment and monitoring.

nginx-share-fixed.conf

@@ -0,0 +1,79 @@
+server {
+    listen 127.0.0.1:4443 ssl http2;
+    listen [::1]:4443 ssl http2;
+    server_name share.uuxo.net;
+
+    # SSL settings
+    ssl_certificate /etc/nginx/ssl/uuxo_nginx.crt;
+    ssl_certificate_key /etc/nginx/ssl/uuxo_nginx.key;
+    ssl_dhparam /etc/nginx/ssl/dhparams.pem;
+
+    # Security headers
+    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "DENY" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "no-referrer-when-downgrade" always;
+    add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
+
+    # Enhanced large file upload settings for 1GB+ multi-transfer
+    client_max_body_size 10G;
+    client_body_timeout 7200s;     # 2 hours for large uploads
+    client_header_timeout 300s;
+    client_body_buffer_size 2m;    # Increased buffer for large files
+    send_timeout 7200s;            # 2 hours to match server timeouts
+
+    # Main location for uploads
+    location / {
+        # REMOVE CORS handling from nginx - let the server handle it
+        # This fixes conflicts with enhanced multi-upload CORS headers
+        
+        # Proxy settings
+        proxy_pass http://127.0.0.1:8080/;
+
+        # Forward client's IP and protocol details
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "Upgrade";
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto https;
+        proxy_redirect off;
+
+        # Disable buffering for large uploads
+        proxy_request_buffering off;
+        proxy_buffering off;
+        proxy_max_temp_file_size 0;
+
+        # Enhanced timeout settings for large file uploads (2 hours)
+        proxy_connect_timeout 7200s;
+        proxy_send_timeout    7200s;
+        proxy_read_timeout    7200s;
+        keepalive_timeout     1800s;   # 30 minutes for multi-upload sessions
+
+        # Connection persistence and resilience for multi-transfer
+        proxy_socket_keepalive on;
+        proxy_next_upstream error timeout http_502 http_503 http_504;
+        proxy_next_upstream_timeout 7200s;
+        proxy_next_upstream_tries 3;   # Allow retries for large file failures
+
+        # Enhanced error handling for large files
+        proxy_intercept_errors off;    # Let server handle errors directly
+    }
+
+    # Block access to specific files
+    location = /upload/robots.txt {
+        deny all;
+        return 403;
+    }
+
+    location = /upload/sitemaps.xml {
+        deny all;
+        return 403;
+    }
+
+    # Enhanced logging for large file debugging
+    error_log /var/log/nginx/upload_errors.log debug;
+    access_log /var/log/nginx/upload_access.log combined;
+}