> GET /info/tty-tree
> accept-encoding: gzip
> accept: */*
> user-agent: bundler/2.1.0.pre.1 rubygems/3.1.0.pre1 ruby/2.6.4 (x86_64-pc-linux-gnu) command/install options/no_install,jobs,spec_run 070c3f972c336c03
> connection: keep-alive
> keep-alive: 30
> host: index.rubygems.org