[question][feature] Add custom CONNECT header for proxy?

[Fenny]

Hello,

There are many proxy providers that use custom headers to authenticate or to rotate the proxy ip.
I'm wondering if I add the following code to proxy.go Line 41-42 would that be the right way to do it?

connectHeader.Set("custom-proxy-header", "hi mom")

If so, maybe we could add this as an extra feature?

dialer := websocket.Dialer{
  HandshakeTimeout: 10 * time.Second,
  Proxy: http.ProxyURL(&url.URL{
    Scheme:     "http",
    Host: 	"127.0.0.1:16969",
    Path: 	"/",
  }),
  ProxyHeaders: map[string]string{
    "custom-proxy-header": "hi mom",
  },
}

Thank you for all the help, I'm new to GO and the community is awesome :)

Duplicate Issue 479

[ghost]

The field should be ProxyConnectHeader http.Header to match the net/http Transport field. Other than that, this is a duplicate of 479.

[Fenny]

Untill this feature gets properly implemented into the main branch, you can use my version.
https://github.com/fenny/websocket

dialer := websocket.Dialer{
  Proxy: http.ProxyURL(&url.URL{
    Scheme: "http",
    Host: "127.0.0.1:6969",
    Path: "/",
  }),
  ProxyConnectHeaders: map[string]string{
    "Proxy-Auth": "user:pass",
    "Proxy-Geo":  "EU",
  },
}