404 Error only on when requesting WWW domain? - nginx

Question

I have a nodejs server running with nginx as a reverse proxy. https://example.com and http://example.com run correctly with http://example.com redirecting to https, but http://www.example.com gives an nginx error 404 Not Found. https://www.example.com does work, though.
This is my server block configuration:
server {
root /var/www/partyshare.shop/html;
index index.html index.htm index.nginx-debian.html;
server_name partyshare.shop www.partyshare.shop;
location / {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/partyshare.shop/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/partyshare.shop/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = partyshare.shop) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
listen [::]:80;
server_name partyshare.shop www.partyshare.shop;
return 404; # managed by Certbot
I believe the error is on the second server block, where $host = www.partyshare.shop when requesting the http version, so it skips past the redirect and returns a 404 error. I tried adding an if statement for the www version, but it errored out, and wouldn't recognize my SSL certificate as the http was crossed out in red, so if anybody could help that would be great.

Answer 1

You should update the 2nd server block to do the same for both partyshare.shop and www.partyshare.shop, and not just partyshare.shop.
server {
listen 80;
listen [::]:80;
server_name partyshare.shop www.partyshare.shop;
return 301 https://$host$request_uri;
}