我刚刚开始设置Flutter以在Mac上运行。我从公司代理后面跑，每次尝试运行
flutter create app我看到了pub get failed。
我在bash个人资料中正确设置了代理设置：
export HTTP_PROXY="http://[myUsername]:[myPassword]@[myProxy]:[myPort]"
export HTTPS_PROXY=$HTTP_PROXY
export ALL_PROXY=$HTTP_PROXY
export http_proxy=$HTTP_PROXY
export https_proxy=$HTTP_PROXY
export all_proxy=$HTTP_PROXY
export GRPC_PROXY_EXP=$HTTP_PROXY
export grpc_proxy_exp=$HTTP_PROXY
export NO_PROXY=localhost,126.0.0.0,127.0.0.1
export STRICT_SSL=false
export strict_ssl=$STRICT_SSL
export NODE_TLS_REJECT_UNAUTHORIZED=0
export node_tls_reject_unauthorized=$NODE_TLS_REJECT_UNAUTHORIZED
运行flutter doctor时，我看到我的代理已正确设置：
✓] Proxy Configuration
• HTTP_PROXY is set
• NO_PROXY is localhost,126.0.0.0,127.0.0.1
• NO_PROXY contains 127.0.0.1
• NO_PROXY contains localhost
在查看Github问题时，我看到其他人遇到了the exact same problems，但没有任何解决方案。
我当前的错误：
Proxy failed to establish tunnel (407 Proxy Authentication Required)
package:pub/src/source/hosted.dart 349:7 BoundHostedSource._throwFriendlyError
package:pub/src/source/hosted.dart 150:7 BoundHostedSource.doGetVersions
===== asynchronous gap ===========================
package:pub/src/source.dart 167:12 BoundSource.getVersions
package:pub/src/solver/package_lister.dart 76:44 PackageLister._versions.<fn>.<fn>
dart:async runZoned
package:pub/src/http.dart 272:10 withDependencyType
package:pub/src/solver/package_lister.dart 75:33 PackageLister._versions.<fn>
===== asynchronous gap ===========================
dart:async new Future.sync
package:async/src/async_memoizer.dart 43:42 AsyncMemoizer.runOnce
package:pub/src/solver/package_lister.dart 74:58 PackageLister._versions
package:pub/src/solver/package_lister.dart 111:21 PackageLister.countVersions
===== asynchronous gap ===========================
package:pub/src/solver/version_solver.dart 354:44 VersionSolver._choosePackageVersion.<fn>
===== asynchronous gap ===========================
package:pub/src/utils.dart 301:39 minByAsync
===== asynchronous gap ===========================
package:pub/src/solver/version_solver.dart 350:25 VersionSolver._choosePackageVersion
===== asynchronous gap ===========================
package:pub/src/solver/version_solver.dart 97:22 VersionSolver.solve
===== asynchronous gap ===========================
package:pub/src/solver.dart 35:10 resolveVersions.<fn>
package:pub/src/log.dart 378:18 progress
package:pub/src/solver.dart 32:10 resolveVersions
package:pub/src/entrypoint.dart 203:24 Entrypoint.acquireDependencies
===== asynchronous gap ===========================
package:pub/src/command/get.dart 41:23 GetCommand.run
package:args/command_runner.dart 194:27 CommandRunner.runCommand
===== asynchronous gap ===========================
package:pub/src/command_runner.dart 171:39 PubCommandRunner.runCommand.<fn>
dart:async new Future.sync
package:pub/src/utils.dart 109:12 captureErrors.<fn>
dart:async runZoned
package:pub/src/utils.dart 126:5 captureErrors
package:pub/src/command_runner.dart 171:13 PubCommandRunner.runCommand
===== asynchronous gap ===========================
package:pub/src/command_runner.dart 119:11 PubCommandRunner.run
===== asynchronous gap ===========================
/b/s/w/ir/k/src/third_party/dart/third_party/pkg/pub/bin/pub.dart 8:22 main
This is an unexpected error. Please run
pub --trace '--verbosity=warning' get --no-precompile
and include the logs in an issue on https://github.com/dart-lang/pub/issues/new
Running "flutter packages get" in my_app...
pub get failed (1)
我才刚刚开始使用Flutter，但不确定是否与Flutter或Dart有关。