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Fix robustness issue: empty JSON {} in cfg.json or wsec.json (#355)

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* Treat empty or effectively-empty configuration files as invalid: restore defaults, optionally fall back to stored settings, and avoid silently using blank configurations.
* Improve presets handling by detecting and recreating empty or undersized preset files so presets are reliably initialized and usable.

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>
This commit is contained in:
Copilot
2026-04-05 17:47:33 +02:00
committed by GitHub
parent 101cb8b5ba
commit 72b1f59e42
3 changed files with 12 additions and 4 deletions
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4
wled00/cfg.cpp
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@@ -659,7 +659,7 @@ void deserializeConfigFromFS() {
DEBUG_PRINTLN(F("Reading settings from /cfg.json..."));
success = readObjectFromFile("/cfg.json", nullptr, &doc);
if (!success) { // if file does not exist, optionally try reading from EEPROM and then save defaults to FS
if (!success || doc.size() == 0) { // if file does not exist or contains only empty JSON (e.g. "{}"), try reading from EEPROM (if supported) and then save defaults to FS
releaseJSONBufferLock();
#ifdef WLED_ADD_EEPROM_SUPPORT
deEEPSettings();
@@ -1122,7 +1122,7 @@ bool deserializeConfigSec() {
if (!requestJSONBufferLock(3)) return false;
bool success = readObjectFromFile("/wsec.json", nullptr, &doc);
if (!success) {
if (!success || doc.size() == 0) { // treat empty JSON (e.g. "{}") the same as a missing file
releaseJSONBufferLock();
return false;
}