Method: Gem::Net::HTTP::Persistent#proxy_from_env

Defined in:
lib/bundler/vendor/net-http-persistent/lib/net/http/persistent.rb

#proxy_from_env ⇒ Object

Creates a Gem::URI for an HTTP proxy server from ENV variables.

If HTTP_PROXY is set a proxy will be returned.

If HTTP_PROXY_USER or HTTP_PROXY_PASS are set the Gem::URI is given the indicated user and password unless HTTP_PROXY contains either of these in the Gem::URI.

The NO_PROXY ENV variable can be used to specify hosts which shouldn’t be reached via proxy; if set it should be a comma separated list of hostname suffixes, optionally with :port appended, for example example.com,some.host:8080. When set to * no proxy will be returned.

For Windows users, lowercase ENV variables are preferred over uppercase ENV variables.



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# File 'lib/bundler/vendor/net-http-persistent/lib/net/http/persistent.rb', line 837

def proxy_from_env
  env_proxy = ENV['http_proxy'] || ENV['HTTP_PROXY']

  return nil if env_proxy.nil? or env_proxy.empty?

  uri = Gem::URI normalize_uri env_proxy

  env_no_proxy = ENV['no_proxy'] || ENV['NO_PROXY']

  # '*' is special case for always bypass
  return nil if env_no_proxy == '*'

  if env_no_proxy then
    uri.query = "no_proxy=#{escape(env_no_proxy)}"
  end

  unless uri.user or uri.password then
    uri.user     = escape ENV['http_proxy_user'] || ENV['HTTP_PROXY_USER']
    uri.password = escape ENV['http_proxy_pass'] || ENV['HTTP_PROXY_PASS']
  end

  uri
end