esp8266-react-framework/lib/framework/SystemStatus.cpp

#include <SystemStatus.h>

SystemStatus::SystemStatus(AsyncWebServer* server, SecurityManager* securityManager) {
  server->on(SYSTEM_STATUS_SERVICE_PATH,
             HTTP_GET,
             securityManager->wrapRequest(std::bind(&SystemStatus::systemStatus, this, std::placeholders::_1),
                                          AuthenticationPredicates::IS_AUTHENTICATED));
}

void SystemStatus::systemStatus(AsyncWebServerRequest* request) {
  AsyncJsonResponse* response = new AsyncJsonResponse(false, MAX_ESP_STATUS_SIZE);
  JsonObject root = response->getRoot();
#ifdef ESP32
  root["esp_platform"] = "esp32";
  root["max_alloc_heap"] = ESP.getMaxAllocHeap();
  root["psram_size"] = ESP.getPsramSize();
  root["free_psram"] = ESP.getFreePsram();  
#elif defined(ESP8266)
  root["esp_platform"] = "esp8266";
  root["max_alloc_heap"] = ESP.getMaxFreeBlockSize();
  root["heap_fragmentation"] = ESP.getHeapFragmentation();
#endif
  root["cpu_freq_mhz"] = ESP.getCpuFreqMHz();
  root["free_heap"] = ESP.getFreeHeap();
  root["sketch_size"] = ESP.getSketchSize();
  root["free_sketch_space"] = ESP.getFreeSketchSpace();
  root["sdk_version"] = ESP.getSdkVersion();
  root["flash_chip_size"] = ESP.getFlashChipSize();
  root["flash_chip_speed"] = ESP.getFlashChipSpeed();

// TODO - Ideally this class will take an *FS and extract the file system information from there.
// ESP8266 and ESP32 do not have feature parity in FS.h which currently makes that difficult.
#ifdef ESP32
  root["fs_total"] = SPIFFS.totalBytes();
  root["fs_used"] = SPIFFS.usedBytes();
#elif defined(ESP8266)
  FSInfo fs_info;
  SPIFFS.info(fs_info);
  root["fs_total"] = fs_info.totalBytes;
  root["fs_used"] = fs_info.usedBytes;
#endif

  response->setLength();
  request->send(response);
}