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Add mutex to putCache

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lifegpc
2024-05-27 11:48:20 +00:00
committed by GitHub
parent 682d24267f
commit b1fdf4cf9f
4 changed files with 73 additions and 53 deletions
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47
lib/platform/image_cache_web.dart
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@@ -2,6 +2,7 @@ import 'dart:js_interop';
import 'dart:js_interop_unsafe';
import 'dart:typed_data';
import 'package:logging/logging.dart';
import 'package:mutex/mutex.dart';
import 'package:web/web.dart';
import 'web/indexed_db.dart';
@@ -14,6 +15,7 @@ class ImageCaches {
int get size => _size;
late IndexedDb _db;
bool _inited = false;
late Mutex _mutex;
Future<void> _updateSize() async {
int total = 0;
await _db.openCursor("images", (cur) {
@@ -51,6 +53,7 @@ class ImageCaches {
}, 1);
await _db.init();
await _updateSize();
_mutex = Mutex();
_inited = true;
}
@@ -90,27 +93,29 @@ class ImageCaches {
Future<void> putCache(String uri, Uint8List data,
Map<String, List<String>> headers, String? realUri) async {
if (!_inited) return;
final he = JSObject();
for (final e in headers.entries) {
he.setProperty(e.key.toJS, e.value.map((e) => e.toJS).toList().toJS);
}
final opts = ResponseInit(status: 200, statusText: 'OK', headers: he);
final lastUsed = DateTime.now().millisecondsSinceEpoch;
final res = Response(data.toJS, opts);
await cache.put(uri.toJS, res).toDart;
final oObj = (await _db.get("images", uri.toJS)) as JSObject?;
final obj = JSObject();
obj.setProperty("url".toJS, uri.toJS);
obj.setProperty("size".toJS, data.length.toJS);
obj.setProperty("last_used".toJS, lastUsed.toJS);
await _db.put("images", obj);
if (oObj == null) {
_size += data.length;
} else {
final originalSize =
(oObj!.getProperty("size".toJS) as JSNumber).toDartInt;
_size += (data.length - originalSize);
}
await _mutex.protect(() async {
final he = JSObject();
for (final e in headers.entries) {
he.setProperty(e.key.toJS, e.value.map((e) => e.toJS).toList().toJS);
}
final opts = ResponseInit(status: 200, statusText: 'OK', headers: he);
final lastUsed = DateTime.now().millisecondsSinceEpoch;
final res = Response(data.toJS, opts);
await cache.put(uri.toJS, res).toDart;
final oObj = (await _db.get("images", uri.toJS)) as JSObject?;
final obj = JSObject();
obj.setProperty("url".toJS, uri.toJS);
obj.setProperty("size".toJS, data.length.toJS);
obj.setProperty("last_used".toJS, lastUsed.toJS);
await _db.put("images", obj);
if (oObj == null) {
_size += data.length;
} else {
final originalSize =
(oObj!.getProperty("size".toJS) as JSNumber).toDartInt;
_size += (data.length - originalSize);
}
});
}
Future<void> updateSize({bool clear = false}) async {