25 lines
818 B
Dart
25 lines
818 B
Dart
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import 'dart:async';
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import 'package:angel_framework/angel_framework.dart';
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/// A middleware that enables the caching of response serialization.
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///
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/// This can improve the performance of sending objects that are complex to serialize.
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///
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/// You can pass a [shouldCache] callback to determine which values should be cached.
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RequestHandler cacheSerializationResults(
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{Duration timeout, FutureOr<bool> Function(RequestContext, ResponseContext, Object) shouldCache}) {
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return (RequestContext req, ResponseContext res) async {
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var oldSerializer = res.serializer;
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var cache = <dynamic, String>{};
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res.serializer = (value) {
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if (shouldCache == null) {
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return cache.putIfAbsent(value, () => oldSerializer(value));
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}
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return oldSerializer(value);
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};
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return true;
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};
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}
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