mirror of
https://github.com/FoggedLens/deflock-app.git
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99 lines
3.3 KiB
Dart
99 lines
3.3 KiB
Dart
import 'package:http/http.dart' as http;
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import 'package:flutter/foundation.dart';
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import 'map_data_provider.dart';
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/// Simple HTTP client that routes tile requests through the centralized MapDataProvider.
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/// This ensures all tile fetching (offline/online routing, retries, etc.) is in one place.
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class SimpleTileHttpClient extends http.BaseClient {
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final http.Client _inner = http.Client();
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final MapDataProvider _mapDataProvider = MapDataProvider();
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@override
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Future<http.StreamedResponse> send(http.BaseRequest request) async {
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// Only intercept tile requests to OSM
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if (request.url.host == 'tile.openstreetmap.org') {
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return _handleTileRequest(request);
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}
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// Pass through all other requests
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return _inner.send(request);
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}
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Future<http.StreamedResponse> _handleTileRequest(http.BaseRequest request) async {
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final pathSegments = request.url.pathSegments;
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// Parse z/x/y from URL like: /15/5242/12666.png
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if (pathSegments.length == 3) {
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final z = int.tryParse(pathSegments[0]);
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final x = int.tryParse(pathSegments[1]);
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final yPng = pathSegments[2];
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final y = int.tryParse(yPng.replaceAll('.png', ''));
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if (z != null && x != null && y != null) {
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return _getTile(z, x, y);
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}
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}
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// Malformed tile URL - pass through to OSM
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return _inner.send(request);
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}
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Future<http.StreamedResponse> _getTile(int z, int x, int y) async {
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try {
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// Use centralized tile fetching from MapDataProvider
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final tileBytes = await _mapDataProvider.getTile(z: z, x: x, y: y);
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debugPrint('[SimpleTileService] Serving tile $z/$x/$y via MapDataProvider');
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return http.StreamedResponse(
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Stream.value(tileBytes),
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200,
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headers: {
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'Content-Type': 'image/png',
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'Cache-Control': 'public, max-age=604800', // 1 week cache
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'Expires': _httpDateFormat(DateTime.now().add(Duration(days: 7))),
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'Last-Modified': _httpDateFormat(DateTime.now().subtract(Duration(hours: 1))),
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},
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);
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} catch (e) {
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debugPrint('[SimpleTileService] Tile fetch failed for $z/$x/$y: $e');
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// Return 404 for any failure - let flutter_map handle gracefully
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return http.StreamedResponse(
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Stream.value(<int>[]),
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404,
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reasonPhrase: 'Tile not available: $e',
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);
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}
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}
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/// Clear any queued tile requests when map view changes
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void clearTileQueue() {
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_mapDataProvider.clearTileQueue();
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}
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/// Format date for HTTP headers (RFC 7231)
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String _httpDateFormat(DateTime date) {
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final utc = date.toUtc();
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final weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
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final months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
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'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
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final weekday = weekdays[utc.weekday - 1];
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final day = utc.day.toString().padLeft(2, '0');
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final month = months[utc.month - 1];
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final year = utc.year;
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final hour = utc.hour.toString().padLeft(2, '0');
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final minute = utc.minute.toString().padLeft(2, '0');
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final second = utc.second.toString().padLeft(2, '0');
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return '$weekday, $day $month $year $hour:$minute:$second GMT';
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}
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@override
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void close() {
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_inner.close();
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super.close();
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}
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} |