尝试在 https://pub.dartlang.org 上查找包 ABC 时出现 TLS 错误

Question

I am using Linux Ubuntu 18.04.1 LTS . I am creating a new Flutter project through git bash or terminal or from Visual Studio Code directly but gets an error which says:

Got TLS error trying to find package cupertino_icons at https://pub.dartlang.org

In Flutter Project's pubspec.yaml file I removed the line " cupertino_icons: ^0.1.2 " in an attempt to resolve the issue but gets the same error on another package:

Got TLS error trying to find package vector_math at https://pub.dartlang.org

I've googled alot but couldn't find the right solution. Please do tell me the main cause of this issue and how to solve it?

Answer 1

In my case it was due to network permissions in our organization. I tried with some another network which has full access and my issue was resolved.

Answer 2

For those who find their way to this answer via Google, here's what worked for me. I am running Windows 10 x64 behind a corporate firewall (Zscaler), and my client uses a self-signed cert. I eventually found this Github comment which described creating a system environment variable pointing to the self-signed cert. Once I created the variable and restarted my command prompts, I was able to execute commands like flutter pub get .

Answer 3

You might need to setup a self-signed certificate to make it work correctly by setting the following enviroment variables:

On Linux:

export DART_VM_OPTIONS="--root-certs-file={path.to.certificate.file}"

On Windows:

set https_proxy="--root-certs-file={path.to.certificate.file}"

And in case you behind a proxy , please, also set the proxy variables:

Linux:

export https_proxy="USERNAME:PASSWORD@hostname:port"

Windows:

set https_proxy=USERNAME:PASSWORD@hostname:port

Answer 4

It's working for me
My example:
1. Add dependency to pubspec.yaml file:

dependencies:
http:
git:
url: git://github.com/dart-lang/http.git

2. When run cmd: flutter packages get. A error will appear at "http_parser" package
   
3. Now, download "http_parser" package from https://pub.dev/ (Version tab -> archive) and extract it to (if it not existed) %FLUTTER_HOME%.pub-cache\\hosted\\pub.dartlang.org
   
4. Add new line in pubspec.lock file (at root folder of project)
   

http_parser:
dependency: transitive
description:
name: http_parser
url: " https://pub.dartlang.org "
source: hosted
version: "3.1.3"

5. Finally, run cmd: flutter packages get again!
   

see more: Using Flutter Package

Answer 5

我确实尝试了很多解决方案，但是当我使用 VPN 时它奏效了.. 在某些国家/地区似乎发生了这种情况。

Answer 6

I'm using ZScaler on Windows. Fortunately, I had the ZScaler root certificate sent over by someone from my corporate IT service desk team. The file name is ZscalerRootCA.cer And then, I used the following value for DART_VM_OPTIONS

--root-certs-file=C:\\$PATH_TO_ZscalerRootCA.cer

Answer 7

我通过执行 Windows 更新故障排除解决了我的问题。

Answer 8

在虚拟机中，如果您的网络工作正常，则检查日期和时间。