flutter pub publish 一直返回`pub finished with exit code 69`，该如何才能上传成功？

目前已尝试的手段有：

设置终端代理

 $ export http_proxy=http://127.0.0.1:7890
 $ export https_proxy=$http_proxy
 
 # 已正常返回
 $ curl google.com
 <HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
 <TITLE>301 Moved</TITLE></HEAD><BODY>
 <H1>301 Moved</H1>
 The document has moved
 <A HREF="http://www.google.com/">here</A>.
 </BODY></HTML>

注释~/.bash_profile

# export PUB_HOSTED_URL=https://pub.flutter-io.cn
# export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

$ source ~/.bash_profile

尝试上传

 $ flutter packages pub publish --server=https://pub.dartlang.org
 $ flutter pub publish --server=https://pub.dev
 
 # 均返回
 Connection closed before full header was received
 pub finished with exit code 69

备注：

$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.3.9, on macOS 12.6.1 21G217 darwin-x64, locale zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.2)
[✓] VS Code (version 1.75.1)
[✓] Proxy Configuration
[✓] Connected device (3 available)
[✓] HTTP Host Availability