http 303 redirect ends up as NSError "A network error occurred."

[tony42]

One of our pages uses 303 redirect to an external site. That seems to work fine on Android. On iOS, we end up with an exception.

I did a bit of digging. I'm pretty sure the code ends up in WebView.swift in the WKScriptMessageHandler. The message.name is "VisitRequestFailed" and code is "0".

Ideal situation would be to preform the redirect, recognize the site is "external" and call Turbolinks.SessionDelegate.session(..., openExternalURL: )