Faraday + SOCKS

socksify_faraday.rb

require 'rubygems'
require 'faraday'
require 'socksify'
require 'socksify/http'
require 'awesome_print'

# This is a SOCKS monkey patch for Faraday, with example use/unit test.
# Notes:
#    * It is altered to work with SOCKS5 authentication.
#    * net_http_class must return a Faraday::Adapter::NetHttp instance.
#    * Verified as of 2020-02-24 with:
#        - SOCKS5 ss5 server
#        - gem faraday, '1.0'
#        - gem socksify,'1.7.1', git: 'git://github.com/pirateradio/socksify-ruby.git'
#        - ruby 2.6

Socksify::debug = true

class Faraday::Adapter::NetHttp
  def net_http_connection(env)
    if proxy = env[:request][:proxy]
      ap here: "PROXY"
      if proxy.scheme == 'socks'
        TCPSocket.socks_username = proxy[:user] if proxy[:user]
        TCPSocket.socks_password = proxy[:password] if proxy[:password]
        Net::HTTP::SOCKSProxy(proxy[:uri].host, proxy[:uri].port)
      else
        Net::HTTP::Proxy(proxy[:uri].host, proxy[:uri].port, proxy[:uri].user, proxy[:uri].password)
      end
    else
        Net::HTTP
    end.new(env[:url].host, env[:url].port)
  end
end

# Replace with your server values, obviously
uri = URI.parse('socks://186.225.157.22:8080')

# DO NOT DO THIS IN PRODUCTION, this is just for testing
SSL_OPTS = {verify: false} 

connection = Faraday.new(url: "https://www.google.com",
                         ssl: SSL_OPTS,
                         proxy: uri) do |c|
  c.headers[:user_agent] = "Just Some Engineer"
  c.adapter :net_http
  c.response :logger 
end

response = connection.get
ap body: response.body

Now at faraday1.7 version, proxy[:socks] will throw an error, instead, use this code:

proxy.scheme == 'sock5'

Now at faraday1.7 version, proxy[:socks] will throw an error, instead, use this code:

proxy.scheme == 'sock5'

NB:
faraday is at 1.0, it's socksify that's 1.7. I have updated and verified the gist. That said, there is an approved PR in Faraday to support socks [Edit May 2021, which is still blocked due to a linter error??]:
lostisland/faraday#992

if proxy.scheme == 'socks5' || proxy.scheme == 'socks4' works due https://github.com/pirateradio/socksify-ruby/blob/master/lib/socksify.rb#L97