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Better handling of out of memory situations in live data websocket

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Thomas Basler 2024-01-04 14:31:09 +01:00 committed by helgeerbe
parent f00cd1bd61
commit f968179b60
1 changed files with 6 additions and 13 deletions
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19
src/WebApi_ws_live.cpp
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@ -6,6 +6,7 @@
#include "Configuration.h"
#include "Datastore.h"
#include "MessageOutput.h"
#include "Utils.h"
#include "WebApi.h"
#include "Battery.h"
#include "Huawei_can.h"
@ -67,20 +68,12 @@ 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
DynamicJsonDocument root(4096 * INV_MAX_COUNT);
if (Utils::checkJsonAlloc(root, __FUNCTION__, __LINE__)) {
JsonVariant var = root;
generateJsonResponse(var);
// 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);
String buffer;
if (buffer) {
String buffer;
serializeJson(root, buffer);
if (Configuration.get().Security.AllowReadonly) {