class Faraday::Adapter::Rack

end
conn.adapter :rack, MyRackApp.new
Faraday.new do |conn|
end
end
[200, {‘Content-Type’ => ‘text/html’}, [“hello world”]]
def call(env)
class MyRackApp
@example
Sends requests to a Rack app.

def build_rack_env(env)

def build_rack_env(env)
  {
    method: env[:method],
    input: env[:body].respond_to?(:read) ? env[:body].read : env[:body],
    'rack.url_scheme' => env[:url].scheme
  }
end

def call(env)

def call(env)
  super
  rack_env = build_rack_env(env)
  env[:request_headers]&.each do |name, value|
    name = name.upcase.tr('-', '_')
    name = "HTTP_#{name}" unless SPECIAL_HEADERS.include? name
    rack_env[name] = value
  end
  timeout = request_timeout(:open, env[:request])
  timeout ||= request_timeout(:read, env[:request])
  response = if timeout
               Timer.timeout(timeout, Faraday::TimeoutError) do
                 execute_request(env, rack_env)
               end
             else
               execute_request(env, rack_env)
             end
  if (req = env[:request]).stream_response?
    warn "Streaming downloads for #{self.class.name} " \
      'are not yet implemented.'
    req.on_data.call(response.body, response.body.bytesize)
  end
  save_response(env, response.status, response.body, response.headers)
  @app.call env
end

def execute_request(env, rack_env)

def execute_request(env, rack_env)
  @session.request(env[:url].to_s, rack_env)
end

def initialize(faraday_app, rack_app)

def initialize(faraday_app, rack_app)
  super(faraday_app)
  mock_session = ::Rack::MockSession.new(rack_app)
  @session     = ::Rack::Test::Session.new(mock_session)
end