From 6c5288a5f85a2b521f61bb29a7a1153421fe3540 Mon Sep 17 00:00:00 2001
From: Louis Wehmschulte <59291494+L-Wehmschulte@users.noreply.github.com>
Date: Sat, 4 Apr 2026 19:21:09 +0200
Subject: [PATCH] Add ScalingTarget to Routes API response (#541)

---
 README.md            |  8 ++++++++
 server/api_server.go | 14 +++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 3934c90..27c35e4 100644
--- a/README.md
+++ b/README.md
@@ -564,6 +564,14 @@ If the client reports "Connection refused" check:
 * `GET /routes` (with `Accept: application/json`)
 
   Retrieves the currently configured routes
+  ```json
+  {
+    "serverAddress": {
+      "backend": "HOST:PORT", // The address the client is routed to
+      "scalingTarget": "HOST:PORT" // The address of the actual minecraft server (will differ from backend when a proxy is configured)
+    }
+  }
+  ```
 
 * `POST /routes` (with `Content-Type: application/json`)
 
diff --git a/server/api_server.go b/server/api_server.go
index eaba753..5620f0b 100644
--- a/server/api_server.go
+++ b/server/api_server.go
@@ -1,6 +1,7 @@
 package server
 
 import (
+	"context"
 	"encoding/json"
 	"expvar"
 	"net/http"
@@ -37,8 +38,19 @@ func registerApiRoutes(apiRoutes *mux.Router) {
 }
 
 func routesListHandler(writer http.ResponseWriter, _ *http.Request) {
+	type serverRoute = struct {
+		Backend       string `json:"backend"`
+		ScalingTarget string `json:"scalingTarget"`
+	}
+
 	mappings := Routes.GetMappings()
-	bytes, err := json.Marshal(mappings)
+	routes := make(map[string]serverRoute, len(mappings))
+	for k := range mappings {
+		backend, address, scalingTarget, _, _ := Routes.FindBackendForServerAddress(context.Background(), k)
+		routes[address] = serverRoute{Backend: backend, ScalingTarget: scalingTarget}
+	}
+
+	bytes, err := json.Marshal(routes)
 	if err != nil {
 		logrus.WithError(err).Error("Failed to marshal mappings")
 		writer.WriteHeader(http.StatusInternalServerError)