Redirecting from router A to router B

Phoenix Forum Questions / Help
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1

Hi everyone!
I’m actually working with ueberuath for google login, the app works with subdomains, and I had to add for each subdomain a URI in the google console to make it work (the subdomains work with their own router and controller), now I’m trying to handle the callbacks with the normal controller and when the request come from a subdomain I want to redirect to a subdomain router route but for some reason when I redirect it redirect me to the same controller so I never get into the other controller to continue the flow as I spected.

Normal controller

def callback(%{assigns: %{ueberauth_failure: _fails}} = conn, _params) do
    IO.inspect(conn, label: "WRONG CALLBACK")

    conn
    |> put_flash(:error, "Failed to authenticate.")
    |> redirect(to: "/")
  end

  def callback(
        %{
          assigns: %{ueberauth_auth: %{info: user, provider: provider}},
          query_params: %{"state" => state},
          state: state_required
        } = conn,
        _params
      ) do
    IO.inspect(state_required, label: "WORKED ON AUTH")

    conn
    |> redirect(to: SubdomainRoutes.listeners_auth_path(conn, :callback, provider))
    |> IO.inspect(label: "REDIRECT!")
  end

  def callback(
        %{
          assigns: %{ueberauth_auth: %{info: user, provider: provider}}
        } = conn,
        _params
      ) do
    user_params =
      user
      |> Map.from_struct()
      |> Map.put(:provider, provider)

    %{user: user_params}
    |> Accounts.find_or_create()
    |> sign_in(conn)
  end

Subdomain controller

def callback(%{assigns: %{ueberauth_failure: _fails}} = conn, _params) do
    IO.inspect(conn, label: "REDIRECT FAILED")

    conn
    |> put_flash(:error, "Failed to authenticate.")
    |> redirect(to: "/")
  end

  def callback(
        %{
          assigns: %{
            ueberauth_auth: %{
              info: %{email: email, name: name},
              extra: %{raw_info: %{user: user}}
            }
          },
          host: host
        } = conn,
        _params
      ) do
    IO.inspect("", label: "REDIRECT SUCCESS")
    authenticate_according_to_host(host, conn, user, email, name)
  end

So when the callback uses the redirect it send me to the first callback which is the error clause instead of sending me to the callback in the other controller

Maybe anyone know how can I accomplish this?

2

Hard to say for certain without seeing the router config, but if you’re hoping to redirect to a subdomain you may need to change this - the _path routing helpers always return a path (starts with /) relative to the current origin.

Depending on the specific of your router, you may also need to pass the subdomain’s Endpoint to the route helper (to get the right host / protocol / etc)

1 Like
3

Hi thanksfor your answer, actually I solved this by using the redirect with external: instead of to: and used a URI struct instead of a conn

  uri = %URI{scheme: "http", host: state, port: 4000}

    conn
    |> redirect(external: SubdomainRoutes.listeners_auth_url(uri, :callback, provider, params))
    |> IO.inspect(label: "REDIRECT!")

but the problem is that I always got a bad request error when the second router receives ueberauth redirect

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