vscode 安装插件 [error] Download: net::ERR_CONNECTION_CLOSED
背景：
vscode安装扩展插件时报错，显示下载失败：
[error] Download: net::ERR_CONNECTION_CLOSED
[error] net::ERR_CONNECTION_CLOSED: Download: net::ERR_CONNECTION_CLOSED
解决方法：
查找相关文档发现这么一段：
If you are behind a firewall that needs to allow specific domains used by VS Code, here's the list of hostnames you should allow communication to go through:
猜测可能是防护墙的问题，关闭后问题解决。
