curl: (56) LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54

Question

当我升级 flutter 时，我遇到了以下错误消息。

curl: (56) LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54

Failed to retrieve the Dart SDK from: https://storage.googleapis.com/flutter_infra/flutter/4737fc5cd89b8f0136e927b00f2e159444b95a73/dart-sdk-darwin-x64.zip
If you're located in China, please see this page:
  https://flutter.io/community/china


Flutter 1.3.8 • channel beta • https://github.com/flutter/flutter.git
Framework • revision e5b1ed7a7f (6 weeks ago) • 2019-04-11 14:01:46 -0700
Engine • revision 4737fc5cd8
Tools • Dart 2.2.1 (build 2.2.1-dev.0.0 571ea80e11)

Running flutter doctor...
Downloading Dart SDK from Flutter engine 4737fc5cd89b8f0136e927b00f2e159444b95a73...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

这是什么？有什么问题？

Answer 1

它的网络问题。如果您的互联网速度很慢并且网络出现问题，您将面临此错误。尝试再次运行

Answer 2

运行这些命令，应该可以解决问题。

echo '--no-alpn' > ~/.curlrc
export HOMEBREW_CURLRC=1

Answer 3

errno 54 是“连接被对等方重置”，这基本上表示一般的网络连接问题。

flutter upgrade我在无线网络临时中断期间就遇到过这种故障。