[Bug]: intermittent reconnection

Is there an existing issue for this?

• I have searched the existing issues

OS/Web Information

• Web Browser: Chrome
• Local OS: Windows 11
• Remote OS: Ubuntu 20.04
• Remote Architecture: x86_64
• code-server --version: v4.5.1

Steps to Reproduce

1. insrtall the latest version of code-server
2. open an project and wating sometimes.
3. open the code-server develope tool, and you can see some log like the below example

Expected

can use code-server normal.

Actual

intermittent reconnection

received socket close event (wasClean: false, code: 1006, reason: ).

Logs

No response

Screenshot/Video

No response

Does this issue happen in VS Code or GitHub Codespaces?

• I cannot reproduce this in VS Code.
• I cannot reproduce this in GitHub Codespaces.

Are you accessing code-server over HTTPS?

• I am using HTTPS.

Notes

use nginx reverse proxy code-server, and nginx configure https.

[shawnweeks]

I’ve been doing some testing and it appears that what’s causing this is a change in behavior to the websocket keep alive between 4.4.0 and 4.5.1. If I add proxy_read_timeout 86400; to my Nginx configuration the issue goes away. By default Nginx has a 60 second read timeout which worked just fine on 4.4.0. Below is my working configuration but we need to figure out why that’s no longer enough. I just don’t know enough about how VSCode works to try and track this down.

server {
    listen 443 ssl;
    server_name dev-1.example.com;
    ssl_certificate /etc/pki/tls/certs/dev-1.cer;
    ssl_certificate_key /etc/pki/tls/private/dev-1.key;
    ssl_protocols TLSv1.2 TLSv1.3;

    location / {
      proxy_pass http://localhost:8080/;
      proxy_set_header Host $host;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection upgrade;
      proxy_read_timeout 86400;
      proxy_set_header Accept-Encoding gzip;
    }
}

[shawnweeks]

There might be shorter values that work, like I said I’m not sure what causing the behavior change since other reverse proxies like Caddy don’t seem to do this.