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Accepted
Alberto Rosentiehl G
Asked: 2021-12-23 12:31:08 +0800 CST 2021-12-23 12:31:08 +0800 CST

WebSocket fails when using reverse proxy on Nginx server - Error 404

  • 772

I have been trying to configure a .net 5 (aspnet core) service when I try to upload the service using Nginx as a reverse proxy the GET and POST requests work but the wss (WebSocket) type requests fail.

I have the following configuration in the nginx configuration file:

location / {
        proxy_pass https://localhost:5001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection keep-alive;
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
}

Do you have any suggestions?

asp.net-core

1 Answers

  1. Best Answer

    You should try this:

    Add this block:

    upstream websocket {
    server localhost:5000;
}

    and use this regular expression for the websocket which actually travels over http/https with the always-connected functionality enabled

    location /subTextoWSUrl/ {
                proxy_pass http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_read_timeout 86400;
        }

    for example: **wss://**miserver.com/ subWSUrlText /a/b/c/d.example.

    This is my configuration file:

    server {

        root /var/www/html;

        index index.html index.htm index.nginx-debian.html;

        server_name miserver.com.co www.miserver.com.co;

        client_max_body_size 100M;

        location / {
                proxy_pass http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection keep-alive;
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
        }

        location /subTextoWSUrl/ {

                proxy_pass http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_read_timeout 86400;
        }

    listen [::]:443 ssl ipv6only=on;
    listen 443 ssl;

    ssl_certificate /etc/letsencrypt/live/miserver.com.co/fullchain.pem; 
    ssl_certificate_key /etc/letsencrypt/live/miserver.com.co/privkey.pem;

    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
}

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

    if ($host = www.miserver.com.co) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

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

    server_name miserver.com.co www.miserver.com.co;
    return 404;
}
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