1 files changed, 44 insertions, 0 deletions
diff --git a/feature/appconnectors/ext_localapi.go b/feature/appconnectors/ext_localapi.go
new file mode 100644
index 000000000..d66ab2eff
--- /dev/null
+++ b/feature/appconnectors/ext_localapi.go
@@ -0,0 +1,44 @@
+// Copyright (c) Tailscale Inc & contributors
+// SPDX-License-Identifier: BSD-3-Clause
+
+package appconnectors
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+
+	"tailscale.com/feature"
+	"tailscale.com/ipn"
+	"tailscale.com/ipn/ipnlocal"
+	"tailscale.com/ipn/localapi"
+	"tailscale.com/types/appctype"
+	"tailscale.com/util/httpm"
+)
+
+func init() {
+	localapi.Register("appc-route-info", serveGetAppcRouteInfo)
+}
+
+func serveGetAppcRouteInfo(h *localapi.Handler, w http.ResponseWriter, r *http.Request) {
+	ext, ok := ipnlocal.GetExt[*extension](h.LocalBackend())
+	if !ok {
+		http.Error(w, feature.ErrUnavailable.Error(), http.StatusNotImplemented)
+		return
+	}
+	if r.Method != httpm.GET {
+		http.Error(w, "only GET allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	ri, err := ext.readRouteInfo()
+	if err != nil {
+		if errors.Is(err, ipn.ErrStateNotExist) {
+			ri = &appctype.RouteInfo{}
+		} else {
+			localapi.WriteErrorJSON(w, err)
+			return
+		}
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(ri)
+}