我一直在尝试为Windows上的Flutter项目获取依赖关系，但是这花费了很长时间，并且过了一会儿，它在“消息”栏中显示了此错误。
Running "flutter pub get" in badhan_blood_bank... OS Error: The semaphore timeout period has expired. , errno = 121, address = storage.googleapis.com, port = 53515 pub get failed (server unavailable) -- attempting retry 1 in 1 second...
我试图以某种方式解决此问题，但未能解决。我正在进行抖动清理，抖动升级并最终重启android studio时会发生同样的问题。
在将url_launcher添加到项目中的依赖项之前，它运行良好。
这是我的pubspec.yaml文件：
version: 1.0.0+1 environment: sdk: ">=2.1.0 <3.0.0" dependencies: flutter: sdk: flutter cupertino_icons: ^0.1.2 firebase_auth: ^0.15.5+2 flutter_facebook_login: ^3.0.0 flutter_icons: ^1.0.0+1 flutter_spinkit: ^4.1.2 firebase_database: ^3.1.3 google_maps_flutter: ^0.5.25 geolocator: ^5.3.0 intl: ^0.16.1 curved_navigation_bar: ^0.3.2 fluttertoast: ^4.0.1 url_launcher: ^5.4.2 dev_dependencies: flutter_test: sdk: flutter flutter: uses-material-design: true assets: - images/
运行“ flutter pub get –verbose”后显示：
[ +27 ms] executing: [C:\src\flutter\flutter\] git -c log.showSignature=false log -n 1 --pretty=format:%H [ +64 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H [ ] 0b8abb4724aa590dd0f429683339b1e045a1594d [ ] executing: [C:\src\flutter\flutter\] git describe --match v*.*.* --first-parent --long --tags [ +56 ms] Exit code 0 from: git describe --match v*.*.* --first-parent --long --tags [ ] v1.12.13+hotfix.8-0-g0b8abb472 [ +7 ms] executing: [C:\src\flutter\flutter\] git rev-parse --abbrev-ref --symbolic @{u} [ +41 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u} [ ] origin/stable [ ] executing: [C:\src\flutter\flutter\] git ls-remote --get-url origin [ +38 ms] Exit code 0 from: git ls-remote --get-url origin [ ] https://github.com/flutter/flutter.git [ +77 ms] executing: [C:\src\flutter\flutter\] git rev-parse --abbrev-ref HEAD [ +41 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD [ ] stable [ +48 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update. [ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update. [ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update. [ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update. [ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update. [ +4 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update. [ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update. [ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update. [ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update. [ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update. [ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update. [ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update. [ +130 ms] Running "flutter pub get" in badhan_blood_bank... [ +5 ms] Using C:\src\flutter\flutter\.pub-cache for the pub cache. [ +1 ms] executing: [D:\@@MyWorks\mahmud\Badhan Blood Bank\badhan_blood_bank\] C:\src\flutter\flutter\bin\cache\dart-sdk\bin\pub.bat --verbose get --no-precompile [ +157 ms] FINE: Pub 2.7.0 [ +3 ms] IO : Spawning "cmd /c ver" in D:\@@MyWorks\mahmud\Badhan Blood Bank\badhan_blood_bank\. [ +7 ms] IO : Finished ver. Exit code 0. [ +1 ms] | stdout: [ ] | | [ +1 ms] | | Microsoft Windows [Version 10.0.18362.720] [ +1 ms] | Nothing output on stderr. [ +102 ms] MSG : Resolving dependencies... [ +9 ms] SLVR: fact: badhanbloodbank is 1.0.0+1 [ +5 ms] SLVR: derived: badhanbloodbank [ +61 ms] SLVR: fact: badhanbloodbank depends on flutter any from sdk [ +1 ms] SLVR: fact: badhanbloodbank depends on cupertino_icons ^0.1.2 [ +1 ms] SLVR: fact: badhanbloodbank depends on firebase_auth ^0.15.5+2 [ +1 ms] SLVR: fact: badhanbloodbank depends on flutter_facebook_login ^3.0.0 [ +1 ms] SLVR: fact: badhanbloodbank depends on flutter_icons ^1.0.0+1 [ +1 ms] SLVR: fact: badhanbloodbank depends on flutter_spinkit ^4.1.2 [ ] SLVR: fact: badhanbloodbank depends on firebase_database ^3.1.3 [ ] SLVR: fact: badhanbloodbank depends on google_maps_flutter ^0.5.25 [ ] SLVR: fact: badhanbloodbank depends on geolocator ^5.3.0 [ ] SLVR: fact: badhanbloodbank depends on intl ^0.16.1 [ ] SLVR: fact: badhanbloodbank depends on curved_navigation_bar ^0.3.2 [ ] SLVR: fact: badhanbloodbank depends on fluttertoast ^4.0.1 [ ] SLVR: fact: badhanbloodbank depends on url_launcher ^5.4.2 [ ] SLVR: fact: badhanbloodbank depends on flutter_test any from sdk [ ] SLVR: selecting badhanbloodbank [ ] SLVR: derived: flutter_test any from sdk [ ] SLVR: derived: url_launcher ^5.4.2 [ +1 ms] SLVR: derived: fluttertoast ^4.0.1 [ +1 ms] SLVR: derived: curved_navigation_bar ^0.3.2 [ ] SLVR: derived: intl ^0.16.1 [ +1 ms] SLVR: derived: geolocator ^5.3.0 [ +1 ms] SLVR: derived: google_maps_flutter ^0.5.25 [ +1 ms] SLVR: derived: firebase_database ^3.1.3 [ ] SLVR: derived: flutter_spinkit ^4.1.2 [ ] SLVR: derived: flutter_icons ^1.0.0+1 [ ] SLVR: derived: flutter_facebook_login ^3.0.0 [ ] SLVR: derived: firebase_auth ^0.15.5+2 [ ] SLVR: derived: cupertino_icons ^0.1.2 [ ] SLVR: derived: flutter any from sdk [ ] IO : Get versions from https://pub.dartlang.org/api/packages/url_launcher. [ +9 ms] IO : HTTP GET https://pub.dartlang.org/api/packages/url_launcher [ +2 ms] | Accept: application/vnd.pub.v2+json [ +1 ms] | X-Pub-OS: windows [ ] | X-Pub-Command: get [ ] | X-Pub-Session-ID: 795584D9-523C-4575-B686-2D496C324C5B [ ] | X-Pub-Environment: flutter_cli:get [ +1 ms] | X-Pub-Reason: direct [ ] | user-agent: Dart pub 2.7.0 [ +934 ms] IO : HTTP response 200 OK for GET https://pub.dartlang.org/api/packages/url_launcher [ +5 ms] | took 0:00:00.938247 [ +2 ms] | transfer-encoding: chunked [ +2 ms] | date: Sun, 29 Mar 2020 19:47:07 GMT [ +2 ms] | content-encoding: gzip [ +2 ms] | vary: Accept-Encoding [ +3 ms] | strict-transport-security: max-age=31536000; preload [ +3 ms] | via: 1.1 google [ +2 ms] | content-type: application/json [ +2 ms] | x-frame-options: SAMEORIGIN [ +2 ms] | x-xss-protection: 1; mode=block [ +2 ms] | x-content-type-options: nosniff [ +2 ms] | server: dart:io with Shelf [ +66 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on flutter any from sdk [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on test_api 0.2.11 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on path 1.6.4 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on image 2.1.4 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on quiver 2.0.5 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on stack_trace 1.9.3 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on vector_math 2.0.8 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on archive 2.0.11 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on args 1.5.2 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on async 2.4.0 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on boolean_selector 1.0.5 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on charcode 1.1.2 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on collection 1.14.11 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on convert 2.1.1 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on crypto 2.1.3 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on matcher 0.12.6 [ +2 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on meta 1.1.8 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on pedantic 1.8.0+1 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on petitparser 2.4.0 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on source_span 1.5.5 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on stream_channel 2.0.0 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on string_scanner 1.0.5 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on term_glyph 1.1.0 [ ] SLVR: fact: flutter_test 0.0.0 from sdk depends on typed_data 1.1.6 [ +1 ms] SLVR: fact: flutter_test 0.0.0 from sdk depends on xml 3.5.0 [ ] SLVR: selecting flutter_test 0.0.0 from sdk [ ] SLVR: derived: xml 3.5.0 [ ] SLVR: derived: typed_data 1.1.6 [ +1 ms] SLVR: derived: term_glyph 1.1.0 [ ] SLVR: derived: string_scanner 1.0.5 [ ] SLVR: derived: stream_channel 2.0.0 [ +2 ms] SLVR: derived: source_span 1.5.5 [ ] SLVR: derived: petitparser 2.4.0 [ ] SLVR: derived: pedantic 1.8.0+1 [ ] SLVR: derived: meta 1.1.8 [ +3 ms] SLVR: derived: matcher 0.12.6 [ ] SLVR: derived: crypto 2.1.3 [ ] SLVR: derived: convert 2.1.1 [ +1 ms] SLVR: derived: collection 1.14.11 [ ] SLVR: derived: charcode 1.1.2 [ ] SLVR: derived: boolean_selector 1.0.5 [ ] SLVR: derived: async 2.4.0 [ +1 ms] SLVR: derived: args 1.5.2 [ +4 ms] SLVR: derived: archive 2.0.11 [ +1 ms] SLVR: derived: vector_math 2.0.8 [ +4 ms] SLVR: derived: stack_trace 1.9.3 [ +1 ms] SLVR: derived: quiver 2.0.5 [ ] SLVR: derived: image 2.1.4 [ +1 ms] SLVR: derived: path 1.6.4 [ +1 ms] SLVR: derived: test_api 0.2.11 [ +1 ms] SLVR: fact: url_launcher >=3.0.0 depends on flutter any from sdk [ ] SLVR: fact: url_launcher >=5.4.0 depends on url_launcher_macos ^0.0.1 [ +1 ms] SLVR: fact: url_launcher >=5.4.1 depends on url_launcher_platform_interface ^1.0.4 [ +1 ms] SLVR: fact: url_launcher >=5.3.0 depends on url_launcher_web ^0.1.0+1 [ +1 ms] SLVR: selecting url_launcher 5.4.2 [ ] SLVR: derived: url_launcher_web ^0.1.0+1 [ ] SLVR: derived: url_launcher_platform_interface ^1.0.4 [ ] SLVR: derived: url_launcher_macos ^0.0.1 [ +1 ms] IO : Get versions from https://pub.dartlang.org/api/packages/url_launcher_web. [ +1 ms] IO : HTTP GET https://pub.dartlang.org/api/packages/url_launcher_web [ ] | Accept: application/vnd.pub.v2+json [ ] | X-Pub-OS: windows [ ] | X-Pub-Command: get [ ] | X-Pub-Session-ID: 795584D9-523C-4575-B686-2D496C324C5B [ ] | X-Pub-Environment: flutter_cli:get [ ] | user-agent: Dart pub 2.7.0 [ +429 ms] IO : HTTP response 200 OK for GET https://pub.dartlang.org/api/packages/url_launcher_web
有什么问题以及如何解决？
从昨天开始，storage.googleapis.com孟加拉国出现了一些问题。
storage.googleapis.com
首先，我认为这可能是Google基础架构的问题。 但是，一段时间后，我意识到这是BTCL的问题。
要解决此问题，您可以使用VPN工具并重新运行您的项目。 我习惯了Hotspot Sheild VPN，之后一切都很好。
Hotspot Sheild VPN
请记住，免费版本限制是500 MB/Day
500 MB/Day
我希望这也对您有用。
