使用gem安装jekyll，提示无法下载：Broken pipe - SSL connection

使用gem install，提示无法下载，原因是管道不通

ERROR: Could not find a valid gem ‘jekyll’ (>= 0), here is why:
Unable to download data from https://rubygems.org/ - Errno::EPIPE: Broken pipe - SSL_connect (https://rubygems.org/latest_specs.4.8.gz)

解决方案1：删除https源，添加http源

sudo gem sources -r https://rubygems.org
sudo gem sources -a http://rubygems.org  

解决方案2：用国内淘宝网提供的RubyGems镜像作为源：

sudo gem sources -r https://rubygems.org/
sudo gem sources -a http://ruby.taobao.org/

感觉应该有别的方案，能用https通道下载