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fix session persistence: replace unreliable SPIFFS.rename with copy+delete

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- fyPromotePrevSession now reads session.json, writes to prev_session.json,
  then deletes the original — SPIFFS.rename() silently fails on ESP32
- prior session KML export: added style defs, raven metadata, error handling,
  moved file validation before response stream init
- reduced auto-save interval 60s → 15s, added 5s quick-save on first detection
This commit is contained in:
Colonel Panic
2026-02-08 15:43:10 -05:00
parent 32d180dc19
commit 6233d4884e
1 changed files with 61 additions and 12 deletions
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src/main.cpp
+61 -12
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@@ -155,7 +155,7 @@ static unsigned long fyGPSLastUpdate = 0;
// Session persistence (SPIFFS)
#define FY_SESSION_FILE "/session.json"
#define FY_PREV_FILE "/prev_session.json"
#define FY_SAVE_INTERVAL 60000 // Auto-save every 60 seconds
#define FY_SAVE_INTERVAL 15000 // Auto-save every 15 seconds (prevent data loss on quick power-cycle)
static unsigned long fyLastSave = 0;
static int fyLastSaveCount = 0; // Track changes to avoid unnecessary writes
static bool fySpiffsReady = false;
@@ -533,14 +533,40 @@ static void fySaveSession() {
}
static void fyPromotePrevSession() {
// Move current session file to prev_session on boot
// Copy current session to prev_session on boot, then delete original
// NOTE: SPIFFS.rename() is unreliable on ESP32 — use copy+delete instead
if (!fySpiffsReady) return;
if (SPIFFS.exists(FY_SESSION_FILE)) {
// Remove old prev if exists
if (SPIFFS.exists(FY_PREV_FILE)) SPIFFS.remove(FY_PREV_FILE);
SPIFFS.rename(FY_SESSION_FILE, FY_PREV_FILE);
printf("[FLOCK-YOU] Prior session promoted from flash\n");
if (!SPIFFS.exists(FY_SESSION_FILE)) {
printf("[FLOCK-YOU] No prior session file to promote\n");
return;
}
File src = SPIFFS.open(FY_SESSION_FILE, "r");
if (!src) {
printf("[FLOCK-YOU] Failed to open session file for promotion\n");
return;
}
String data = src.readString();
src.close();
if (data.length() == 0) {
printf("[FLOCK-YOU] Session file empty, skipping promotion\n");
SPIFFS.remove(FY_SESSION_FILE);
return;
}
// Write to prev_session (overwrite any existing)
File dst = SPIFFS.open(FY_PREV_FILE, "w");
if (!dst) {
printf("[FLOCK-YOU] Failed to create prev_session file\n");
return;
}
dst.print(data);
dst.close();
// Delete the old session file so it doesn't get re-promoted next boot
SPIFFS.remove(FY_SESSION_FILE);
printf("[FLOCK-YOU] Prior session promoted: %d bytes\n", data.length());
}
// ============================================================================
@@ -847,34 +873,51 @@ static void fySetupServer() {
r->send(404, "application/json", "{\"error\":\"no prior session\"}");
return;
}
AsyncResponseStream *resp = r->beginResponseStream("application/vnd.google-earth.kml+xml");
resp->addHeader("Content-Disposition", "attachment; filename=\"flockyou_prev_session.kml\"");
// Read prev session and generate KML
File f = SPIFFS.open(FY_PREV_FILE, "r");
if (!f) { r->send(500, "text/plain", "read error"); return; }
String content = f.readString();
f.close();
if (content.length() == 0) {
r->send(404, "application/json", "{\"error\":\"prior session empty\"}");
return;
}
AsyncResponseStream *resp = r->beginResponseStream("application/vnd.google-earth.kml+xml");
resp->addHeader("Content-Disposition", "attachment; filename=\"flockyou_prev_session.kml\"");
resp->print("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n<Document>\n"
"<name>Flock-You Prior Session</name>\n");
"<name>Flock-You Prior Session</name>\n"
"<description>Surveillance device detections from prior session</description>\n"
"<Style id=\"det\"><IconStyle><color>ff4489ec</color>"
"<scale>1.0</scale></IconStyle></Style>\n"
"<Style id=\"raven\"><IconStyle><color>ff4444ef</color>"
"<scale>1.2</scale></IconStyle></Style>\n");
// Parse JSON array and emit placemarks
JsonDocument doc;
DeserializationError err = deserializeJson(doc, content);
if (!err && doc.is<JsonArray>()) {
int placed = 0;
for (JsonObject d : doc.as<JsonArray>()) {
JsonObject gps = d["gps"];
if (!gps || !gps.containsKey("lat")) continue;
bool isRaven = d["raven"] | false;
resp->printf("<Placemark><name>%s</name>\n", d["mac"] | "?");
resp->printf("<styleUrl>#%s</styleUrl>\n", isRaven ? "raven" : "det");
resp->print("<description><![CDATA[");
if (d["name"].is<const char*>() && strlen(d["name"] | "") > 0)
resp->printf("<b>Name:</b> %s<br/>", d["name"] | "");
resp->printf("<b>Method:</b> %s<br/><b>RSSI:</b> %d<br/><b>Count:</b> %d",
d["method"] | "?", d["rssi"] | 0, d["count"] | 1);
if (isRaven && d["fw"].is<const char*>())
resp->printf("<br/><b>Raven FW:</b> %s", d["fw"] | "");
resp->print("]]></description>\n");
resp->printf("<Point><coordinates>%.8f,%.8f,0</coordinates></Point>\n",
(double)(gps["lon"] | 0.0), (double)(gps["lat"] | 0.0));
resp->print("</Placemark>\n");
placed++;
}
printf("[FLOCK-YOU] Prior session KML: %d placemarks\n", placed);
} else {
printf("[FLOCK-YOU] Prior session KML: JSON parse failed\n");
}
resp->print("</Document>\n</kml>");
r->send(resp);
@@ -984,12 +1027,18 @@ void loop() {
}
}
// Auto-save session to SPIFFS every 60s if detections changed
// Auto-save session to SPIFFS every 15s if detections changed
// Also triggers an early save 5s after first detection to minimize loss on power-cycle
if (fySpiffsReady && millis() - fyLastSave >= FY_SAVE_INTERVAL) {
if (fyDetCount > 0 && fyDetCount != fyLastSaveCount) {
fySaveSession();
}
fyLastSave = millis();
} else if (fySpiffsReady && fyDetCount > 0 && fyLastSaveCount == 0 &&
millis() - fyLastSave >= 5000) {
// Quick first-save: persist within 5s of first detection
fySaveSession();
fyLastSave = millis();
}
delay(100);