added examples file

Node-js open wen socket refresh issues in client apps can be caused by Nginx proxy mis-configs. See optimization examples here.
2026-09-04 15:43:05 +00:00
parent b0bc0f0637
commit bfea0d5c90
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+# /etc/nginx/sites-available/myapp
+# Required for WebSocket upgrade handling
+map $http_upgrade $connection_upgrade {
+   default upgrade;
+   ''      close;
+}
+upstream node_backend {
+   server 127.0.0.1:3000;
+   # Keep connections to Node alive
+   keepalive 32;
+}
+server {
+   listen 443 ssl;
+   listen [::]:443 ssl;
+   server_name example.com;
+   # Your existing SSL configuration
+   ssl_certificate     /etc/letsencrypt/live/example.com/fullchain.pem;
+   ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
+   # -------------------------------------------------------
+   # Dynamic Node.js application
+   # -------------------------------------------------------
+   location / {
+       proxy_pass http://node_backend;
+       # HTTP/1.1 is important for keep-alive/WebSocket/SSE
+       proxy_http_version 1.1;
+       # Preserve original request information
+       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 $scheme;
+       # WebSocket support
+       proxy_set_header Upgrade $http_upgrade;
+       proxy_set_header Connection $connection_upgrade;
+       # ---------------------------------------------------
+       # IMPORTANT FOR DYNAMIC/STREAMING APPLICATIONS
+       # ---------------------------------------------------
+       # Don't allow Nginx to hold dynamic responses in buffers
+       proxy_buffering off;
+       # Don't cache application responses
+       proxy_cache off;
+       # Don't buffer requests either
+       proxy_request_buffering off;
+       # Long-running Node connections
+       proxy_connect_timeout 10s;
+       proxy_send_timeout 3600s;
+       proxy_read_timeout 3600s;
+       # Keep connection alive
+       proxy_socket_keepalive on;
+       # Don't rewrite redirects unexpectedly
+       proxy_redirect off;
+   }
+   # -------------------------------------------------------
+   # Optional explicit WebSocket endpoint
+   # Change /socket.io/ to whatever your application uses
+   # -------------------------------------------------------
+   location /socket.io/ {
+       proxy_pass http://node_backend;
+       proxy_http_version 1.1;
+       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 $scheme;
+       proxy_set_header Upgrade $http_upgrade;
+       proxy_set_header Connection $connection_upgrade;
+       proxy_buffering off;
+       proxy_cache off;
+       proxy_connect_timeout 10s;
+       proxy_send_timeout 3600s;
+       proxy_read_timeout 3600s;
+       proxy_socket_keepalive on;
+   }
+}
+
+
+
+==================================
+I would also explicitly prevent browser caching
+For dynamic API responses, I’d consider:I would also explicitly prevent browser caching
+For dynamic API responses, I’d consider:
+==================================
+
+location /api/ {
+   proxy_pass http://node_backend;
+   proxy_http_version 1.1;
+   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 $scheme;
+   proxy_buffering off;
+   proxy_cache off;
+   add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0" always;
+   add_header Pragma "no-cache" always;
+   add_header Expires "0" always;
+   proxy_read_timeout 3600s;
+   proxy_send_timeout 3600s;
+}
+
+
+===========================
+Check for :
+===========================
+
+proxy_http_version 1.1;
+proxy_buffering off;
+proxy_cache off;
+proxy_read_timeout 3600s;
+proxy_send_timeout 3600s;
+proxy_socket_keepalive on;
+
+=======================