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I have a simple expressjs app set up behind the Nginx server to take requests to upload the files.

When uploading files without Nginx server, the upload progress is obtained through XMLHttpRequest event successfully. But with Nginx configured as reverse proxy, it is not working

Here are my configuration files for Nginx:

/etc/nginx/nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log;
include /etc/nginx/modules-enabled/*.conf;

events {
        worker_connections 768;
        # multi_accept on;
}

http {
        sendfile on;
        tcp_nopush on;
        types_hash_max_size 2048;

        include /etc/nginx/mime.types;
        default_type application/octet-stream;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
        ssl_prefer_server_ciphers on;

        access_log /var/log/nginx/access.log;

        gzip on;

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;

        client_max_body_size 100M;
}

/etc/nginx/sites-available/default

server {

        server_name DOMAIN_NAME;

        location / {
                proxy_pass http://127.0.0.1:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
                proxy_redirect off;
                proxy_request_buffering off;
        }


    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/[DOMAIN_NAME]/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/[DOMAIN_NAME]/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}
server {
    if ($host = DOMAIN_NAME) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


        listen 80 default_server;
        listen [::]:80 default_server;

        server_name DOMAIN_NAME;
    return 404; # managed by Certbot
}

Any help will be greatly appreciated

Improve this question
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  • Your nginx config assumes proxying WebSocket protocol, as described in the official documentation page, recipe #1. If your app doesn't use WebSocket, remove the relevant config parts. If it does, try recipe #2 from the aforementioned documentation page. Commented Apr 3 at 22:39
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