Question

在Flutter iOS应用中，我试图使用预签名URL将文件上传到AWS S3。

适用于小文件。但是，在上传5x MB文件时会引发以下错误。可以在iOS Simulator中成功上传文件，但在真实设备中失败，则很奇怪。

以下是错误消息。

flutter: Exception: SocketException: Read failed (OS Error: Connection reset by peer, errno = 54), address = s3.eu-central-1.amazonaws.com, port = 54505
flutter: Stacktrace: #0      _NativeSocket.read (dart:io-patch/socket_patch.dart:718:38)
#1      _RawSocket.read (dart:io-patch/socket_patch.dart:1457:22)
#2      _RawSecureSocket._readSocketOrBufferedData (dart:io/secure_socket.dart:974:22)
#3      _ExternalBuffer.writeFromSource (dart:io/secure_socket.dart:1216:30)
#4      _RawSecureSocket._readSocket (dart:io/secure_socket.dart:983:16)
#5      _RawSecureSocket._readHandler (dart:io/secure_socket.dart:776:5)
#6      _RawSecureSocket._eventDispatcher (dart:io/secure_socket.dart:764:9)
#7      _rootRunUnary (dart:async/zone.dart:1138:13)
#8      _CustomZone.runUnary (dart:async/zone.dart:1031:19)
#9      _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
#10     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:338:11)
#11     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:265:7)
#12     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:766:19)
#13     _StreamController._add (dart:async/stream_controller.dart:642:7)
#14     _StreamController.add (dart:async/stream_controller.dart:588:5)
#15     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1399:33)
#16     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:919:14)
#17     _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
#18     _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)

我的代码如下。

import 'package:http/http.dart' as http;
Response response = await http.put(
      url,
      headers: {
        "Connection": "Keep-Alive",
      },
      body: await file.readAsBytes(),
    ).timeout(Duration(minutes: 5), onTimeout: () {
      developer.log("TIMEOUT");
      return null;
    });

谁能帮助我做错什么？

更新1： 扑医生-v如下

[✓] Flutter (Channel stable, v1.12.13+hotfix.9, on Mac OS X 10.15.3 19D76, locale en-GB)
    • Flutter version 1.12.13+hotfix.9 at /Users/leochiu/Documents/Sources/flutter
    • Framework revision f139b11009 (6 weeks ago), 2020-03-30 13:57:30 -0700
    • Engine revision af51afceb8
    • Dart version 2.7.2

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/leochiu/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.4.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.4.1, Build version 11E503a
    • CocoaPods version 1.9.1

[✓] Android Studio (version 3.6)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[!] VS Code (version 1.45.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (1 available)
    • S Box8Q40C • 0123456789 • android-arm • Android 4.4.2 (API 19)

! Doctor found issues in 1 category.

Answer 1

对我来说，解决方案是添加下一个标题 accept-encoding: gzip, deflate, br

将文件上传到S3时出现Flutter SocketException

1 个答案: