From 65319ed07e251e53d2e521df80bfd4b1e7e8556c Mon Sep 17 00:00:00 2001
From: helgeerbe <helge@erbehome.de>
Date: Thu, 4 Jan 2024 15:38:28 +0100
Subject: [PATCH] log if memory allocation for live view fails

Explained in #591
---
 src/WebApi_ws_live.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/WebApi_ws_live.cpp b/src/WebApi_ws_live.cpp
index 20308d779..f3a427292 100644
--- a/src/WebApi_ws_live.cpp
+++ b/src/WebApi_ws_live.cpp
@@ -68,6 +68,14 @@ void WebApiWsLiveClass::loop()
         try {
             std::lock_guard<std::mutex> lock(_mutex);
             DynamicJsonDocument root(4200 * INV_MAX_COUNT); // TODO(helge) check if this calculation is correct
+
+            // TODO(helge) temporary dump of memory usage if allocation of DynamicJsonDocument fails (will be fixed in upstream repo)
+            if (root.capacity() == 0) {
+                MessageOutput.printf("Calling /api/livedata/status has temporarily run out of resources. Reason: Alloc memory for DynamicJsonDocument failed (FreeHeap = %d, MaxAllocHeap = %d, MinFreeHeap = %d).\r\n", ESP.getFreeHeap(), ESP.getMaxAllocHeap(), ESP.getMinFreeHeap());
+                _lastWsPublish = millis();
+                return;
+            }
+
             JsonVariant var = root;
             generateJsonResponse(var);