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Fix tile loading finally

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This commit is contained in:
stopflock
2025-11-22 13:22:17 -06:00
parent 3baed3c328
commit 7ff04851f4
6 changed files with 31 additions and 23 deletions
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lib/services/map_data_submodules/tiles_from_remote.dart
+17 -15
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@@ -9,7 +9,7 @@ import 'package:deflockapp/dev_config.dart';
import '../network_status.dart';
/// Global semaphore to limit simultaneous tile fetches
final _tileFetchSemaphore = _SimpleSemaphore(4); // Max 4 concurrent
final _tileFetchSemaphore = _SimpleSemaphore(kTileFetchConcurrentThreads);
/// Clear queued tile requests when map view changes significantly
void clearRemoteTileQueue() {
@@ -93,15 +93,15 @@ bool _isTileVisible(int z, int x, int y, LatLngBounds viewBounds) {
/// Fetches a tile from any remote provider, with in-memory retries/backoff, and global concurrency limit.
/// Returns tile image bytes, or throws on persistent failure.
/// Fetches a tile from any remote provider with unlimited retries.
/// Returns tile image bytes. Retries forever until success.
/// Brutalist approach: Keep trying until it works - no arbitrary retry limits.
Future<List<int>> fetchRemoteTile({
required int z,
required int x,
required int y,
required String url,
}) async {
const int maxAttempts = kTileFetchMaxAttempts;
int attempt = 0;
final random = Random();
final hostInfo = Uri.parse(url).host; // For logging
@@ -109,20 +109,23 @@ Future<List<int>> fetchRemoteTile({
while (true) {
await _tileFetchSemaphore.acquire(z: z, x: x, y: y);
try {
// Only log on first attempt or errors
if (attempt == 1) {
// Only log on first attempt
if (attempt == 0) {
debugPrint('[fetchRemoteTile] Fetching $z/$x/$y from $hostInfo');
}
attempt++;
final resp = await http.get(Uri.parse(url));
if (resp.statusCode == 200 && resp.bodyBytes.isNotEmpty) {
// Success - no logging for normal operation
NetworkStatus.instance.reportOsmTileSuccess(); // Generic tile server reporting
// Success!
if (attempt > 1) {
debugPrint('[fetchRemoteTile] SUCCESS $z/$x/$y from $hostInfo after $attempt attempts');
}
NetworkStatus.instance.reportOsmTileSuccess();
return resp.bodyBytes;
} else {
debugPrint('[fetchRemoteTile] FAIL $z/$x/$y from $hostInfo: code=${resp.statusCode}, bytes=${resp.bodyBytes.length}');
NetworkStatus.instance.reportOsmTileIssue(); // Generic tile server reporting
NetworkStatus.instance.reportOsmTileIssue();
throw HttpException('Failed to fetch tile $z/$x/$y from $hostInfo: status ${resp.statusCode}');
}
} catch (e) {
@@ -130,17 +133,16 @@ Future<List<int>> fetchRemoteTile({
if (e.toString().contains('Connection refused') ||
e.toString().contains('Connection timed out') ||
e.toString().contains('Connection reset')) {
NetworkStatus.instance.reportOsmTileIssue(); // Generic tile server reporting
}
if (attempt >= maxAttempts) {
debugPrint("[fetchRemoteTile] Failed for $z/$x/$y from $hostInfo after $attempt attempts: $e");
rethrow;
NetworkStatus.instance.reportOsmTileIssue();
}
// Calculate delay and retry (no attempt limit - keep trying forever)
final delay = _calculateRetryDelay(attempt, random);
if (attempt == 1) {
debugPrint("[fetchRemoteTile] Attempt $attempt for $z/$x/$y from $hostInfo failed: $e. Retrying in ${delay}ms.");
} else if (attempt % 10 == 0) {
// Log every 10th attempt to show we're still working
debugPrint("[fetchRemoteTile] Still trying $z/$x/$y from $hostInfo (attempt $attempt). Retrying in ${delay}ms.");
}
await Future.delayed(Duration(milliseconds: delay));
} finally {