78 lines
2.5 KiB
Dart
78 lines
2.5 KiB
Dart
/*
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* @Author: wangyang 1147192855@qq.com
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* @Date: 2022-10-22 18:18:58
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* @LastEditors: wangyang 1147192855@qq.com
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* @LastEditTime: 2022-10-22 18:20:20
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* @FilePath: \sell_ticket_app\lib\utils\img_util\NetworkImageSSL.dart
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* @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
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*/
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import 'dart:async';
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import 'dart:io';
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import 'dart:typed_data';
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import 'dart:ui' as ui show instantiateImageCodec, Codec;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/painting.dart';
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/// Image.network方法显示HTTPS图片时忽略证书
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class NetworkImageSSL extends ImageProvider<NetworkImageSSL> {
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const NetworkImageSSL(this.url, {this.scale = 1.0, this.headers})
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: assert(url != null),
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assert(scale != null);
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final String url;
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final double scale;
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final Map<String, String>? headers;
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@override
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Future<NetworkImageSSL> obtainKey(ImageConfiguration configuration) {
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return new SynchronousFuture<NetworkImageSSL>(this);
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}
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@override
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ImageStreamCompleter load(NetworkImageSSL key, DecoderCallback decode) {
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return MultiFrameImageStreamCompleter(codec: _loadAsync(key), scale: key.scale);
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}
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static final HttpClient _httpClient = new HttpClient()
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..badCertificateCallback =
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((X509Certificate cert, String host, int port) => true);
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Future<ui.Codec> _loadAsync(NetworkImageSSL key) async {
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assert(key == this);
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final Uri resolved = Uri.base.resolve(key.url);
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final HttpClientRequest request = await _httpClient.getUrl(resolved);
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headers?.forEach((String name, String value) {
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request.headers.add(name, value);
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});
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final HttpClientResponse response = await request.close();
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if (response.statusCode != HttpStatus.ok)
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throw new Exception(
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'HTTP请求失败，状态码: ${response.statusCode}, $resolved');
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final Uint8List bytes = await consolidateHttpClientResponseBytes(response);
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if (bytes.lengthInBytes == 0)
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throw new Exception('NetworkImageSSL是一个空文件: $resolved');
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return await ui.instantiateImageCodec(bytes);
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}
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@override
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bool operator ==(dynamic other) {
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if (other.runtimeType != runtimeType) return false;
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final NetworkImageSSL typedOther = other;
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return url == typedOther.url && scale == typedOther.scale;
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}
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@override
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int get hashCode => hashValues(url, scale);
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@override
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String toString() => '$runtimeType("$url", scale: $scale)';
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}
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