Ruby Gem proxy settings

May be the cause of the national firewall package, the installation of Railsinstaller after the execution always error,

Bundle Install
DL is deprecated, fiddle
Fetching gem metadata from https://rubygems.org/.....
Resolving dependencies ...

Gem::remotefetcher::fetcherror:ssl_connect returned=1 errno=0 State=sslv3 Read
Server certificate b:certificate verify failed (https://rubygems.org/gems/rake-
10.4.2.gem)
An error occurred while installing rake (10.4.2), and bundler cannot continue.
Make sure, that gem install rake -v ‘10.4.2‘ succeeds before bundling.

Gem Install rake-v 10.4.2
Error:could not find a valid gem ' rake ' (= 10.4.2), where is:
Unable to download data from https://rubygems.org/-Ssl_connect retur
Ned=1 errno=0 State=sslv3 Read server certificate b:certificate verify failed (
https://api.rubygems.org/specs.4.8.gz)

It is important to set up a proxy for this Ruby gem, and here are a few commands

Gem Help
Gem Help Commands
Gem Sources-h
Gem Sources-l
Gem Sources-r https://rubygem.org/
Gem Sources-a http://ruby.taobao.org

Ruby Gem proxy settings