method

proxy_from_env

Ruby latest stable (v2_5_5) - 0 notes - Class: Persistent

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proxy_from_env() public

Creates a 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 URI is given the indicated user and password unless HTTP_PROXY contains either of these in the 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 905
  def proxy_from_env
    env_proxy = ENV['http_proxy'] || ENV['HTTP_PROXY']

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

    uri = 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

proxy_from_env

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