root: add support for PROXY protocol on listeners

closes #1161

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/web/web.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
+	"github.com/pires/go-proxyproto"
 	log "github.com/sirupsen/logrus"
 	"goauthentik.io/internal/config"
 )
@@ -63,7 +64,10 @@ func (ws *WebServer) listenPlain() {
 	}
 	ws.log.WithField("addr", config.G.Web.Listen).Info("Running")
 
-	ws.serve(ln)
+	proxyListener := &proxyproto.Listener{Listener: ln}
+	defer proxyListener.Close()
+
+	ws.serve(proxyListener)
 
 	ws.log.WithField("addr", config.G.Web.Listen).Info("Running")
 	err = http.ListenAndServe(config.G.Web.Listen, ws.m)