bundle install出现这个问题怎么回事

改一下gems的源头：
$ cat Gemfile
# A sample Gemfile
#source "ｈｔｔｐｓ：／／rubygems.org"
source "ｈｔｔｐｓ：／／ruby.taobao.org"
gem "sinatra"
$ bundle install
Fetching gem metadata from ｈｔｔｐｓ：／／ruby.taobao.org/...........
Resolving dependencies...
Installing rack 1.5.2
Installing rack-protection 1.5.3
Installing tilt 1.4.1
Installing sinatra 1.4.5
Using bundler 1.7.7
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.