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tile fetching and caching much improved

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This commit is contained in:
stopflock
2025-08-23 18:08:25 -05:00
parent a21e807d88
commit 722e640a72
2 changed files with 28 additions and 41 deletions
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lib/services/simple_tile_service.dart
+21 -13
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@@ -40,31 +40,39 @@ class SimpleTileHttpClient extends http.BaseClient {
}
Future<http.StreamedResponse> _getTile(int z, int x, int y) async {
// Only serve from offline if available - otherwise let flutter_map handle directly
try {
// Use centralized tile fetching from MapDataProvider
final tileBytes = await _mapDataProvider.getTile(z: z, x: x, y: y);
debugPrint('[SimpleTileService] Serving tile $z/$x/$y via MapDataProvider');
// Check if we have this tile offline (without fetching)
final localTileBytes = await _mapDataProvider.getTile(z: z, x: x, y: y, source: MapSource.local);
debugPrint('[SimpleTileService] Serving tile $z/$x/$y from offline storage');
// Serve offline tile with proper cache headers
return http.StreamedResponse(
Stream.value(tileBytes),
Stream.value(localTileBytes),
200,
headers: {
'Content-Type': 'image/png',
'Cache-Control': 'public, max-age=604800', // 1 week cache
'Cache-Control': 'public, max-age=604800',
'Expires': _httpDateFormat(DateTime.now().add(Duration(days: 7))),
'Last-Modified': _httpDateFormat(DateTime.now().subtract(Duration(hours: 1))),
},
);
} catch (e) {
debugPrint('[SimpleTileService] Tile fetch failed for $z/$x/$y: $e');
// Return 404 for any failure - let flutter_map handle gracefully
return http.StreamedResponse(
Stream.value(<int>[]),
404,
reasonPhrase: 'Tile not available: $e',
);
// No offline tile - try OSM with proper error handling
debugPrint('[SimpleTileService] No offline tile for $z/$x/$y - trying OSM');
try {
return await _inner.send(http.Request('GET', Uri.parse('https://tile.openstreetmap.org/$z/$x/$y.png')));
} catch (networkError) {
debugPrint('[SimpleTileService] OSM request failed for $z/$x/$y: $networkError');
// Return 404 instead of throwing - let flutter_map handle gracefully
return http.StreamedResponse(
Stream.value(<int>[]),
404,
reasonPhrase: 'Network tile unavailable: $networkError',
);
}
}
}