执行flutter pub get遇socket错误：无法在pub.dev查找test包

报错信息 #

C:\flutter\bin\flutter.bat --no-color pub get
Running "flutter pub get" in flutter_tools...
Resolving dependencies in ..\..\..\..\flutter\packages\flutter_tools...
Waiting for another flutter command to release the startup lock...
Got socket error trying to find package test at https://pub.dev.
pub get failed
command: "C:\flutter\bin\cache\dart-sdk\bin\dart __deprecated_pub --directory ..\..\..\..\flutter\packages\flutter_tools get --example"
pub env: {
  "FLUTTER_ROOT": "C:\flutter",
  "PUB_ENVIRONMENT": "flutter_cli:get",
  "PUB_CACHE": "C:\Users\Anselemcrizy\AppData\Local\Pub\Cache",
}
exit code: 69

排查与解决步骤 #

• 释放启动锁
  找到Flutter安装目录下的bin/cache/lockfile文件并删除，之后重新执行flutter pub get。

• 验证网络连通性
  手动访问https://pub.dev确认可正常加载；若无法访问，切换网络环境（如热点）或检查代理设置是否正确；执行flutter doctor -v查看网络相关诊断信息。

• 清理Pub缓存
  执行flutter pub cache clean清除损坏缓存，再重新运行flutter pub get。

• 切换国内Pub镜像
  临时切换：执行flutter pub get --source=https://pub.flutter-io.cn
  永久配置：在系统环境变量中添加PUB_HOSTED_URL=https://pub.flutter-io.cn和FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn，重启终端后重试命令。

• 更新Flutter与检查依赖
  执行flutter upgrade升级到最新稳定版；检查pubspec.yaml中test包的版本号是否合法，避免指定不存在的版本。

内容的提问来源于stack exchange，提问作者Anselem Chijioke