Server Crashed after [HPM] Upgrading to WebSocket socket error

Checks

• I understand project setup issues should be asked on StackOverflow or in GitHub Discussions.
• I updated to latest http-proxy-middleware.

Describe the bug (be clear and concise)

Step-by-step reproduction instructions

1. Proxy Websocket Broken

Expected behavior (be clear and concise)

Server not crashed, just log errors

How is http-proxy-middleware used in your project?

const { createProxyMiddleware } = require('http-proxy-middleware');

...
createProxyMiddleware({
  target: `http://127.0.0.1:${this.port}/`,
  changeOrigin: true,
  ws: true,
  router: (req) => {
    const url = req.url;
    if (url.startsWith('/xxx')) {
      return null;
    }
    const result = this.router(url, this.url, this.port);
    if (result) {
      return result;
    }
    if (url.startsWith('/v1')) {
      return this.url;
    }
    return `http://127.0.0.1:${this.port}/`;
  },
})
...

### What http-proxy-middleware configuration are you using?

```typescript
{
  target: `http://127.0.0.1:${this.port}/`,
  changeOrigin: true,
  ws: true,
  router: (req) => {
    const url = req.url;
    if (url.startsWith('/xxx')) {
      return null;
    }
    const result = this.router(url, this.url, this.port);
    if (result) {
      return result;
    }
    if (url.startsWith('/v1')) {
      return this.url;
    }
    return `http://127.0.0.1:${this.port}/`;
  },
}

### What OS/version and node/version are you seeing the problem?

```shell
Platform: darwin
Architecture: arm64
Kernal: 21.3.0
Node: v16.14.2
V8: 9.4.146.24-node.20
NPM: 6.14.16
Yarn: 1.22.18

Additional context (optional)

No response

[whatwewant]

Hi. Thanks for reporting.

Could you try with http-proxy-middleware@beta? (v3.0.0-beta.0)

V3 registered some additional error handlers to catch the uncaught errors. (https://github.com/chimurai/http-proxy-middleware/blob/master/src/plugins/default/debug-proxy-errors-plugin.ts)

Hopefully it’s already fixed in V3

thanks for reply, i will try it later

[shekharramola]

It is coming in beta too