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rack.rb
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rack.rb
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# frozen_string_literal: true
module Faraday
class Adapter
# Sends requests to a Rack app.
#
# @example
#
# class MyRackApp
# def call(env)
# [200, {'Content-Type' => 'text/html'}, ["hello world"]]
# end
# end
#
# Faraday.new do |conn|
# conn.adapter :rack, MyRackApp.new
# end
class Rack < Faraday::Adapter
dependency 'rack/test'
# not prefixed with "HTTP_"
SPECIAL_HEADERS = %w[ CONTENT_LENGTH CONTENT_TYPE ]
def initialize(faraday_app, rack_app)
super(faraday_app)
mock_session = ::Rack::MockSession.new(rack_app)
@session = ::Rack::Test::Session.new(mock_session)
end
def call(env)
super
rack_env = {
method: env[:method],
input: env[:body].respond_to?(:read) ? env[:body].read : env[:body],
'rack.url_scheme' => env[:url].scheme
}
env[:request_headers].each do |name, value|
name = name.upcase.tr('-', '_')
name = "HTTP_#{name}" unless SPECIAL_HEADERS.include? name
rack_env[name] = value
end if env[:request_headers]
timeout = env[:request][:timeout] || env[:request][:open_timeout]
response = if timeout
Timer.timeout(timeout, Faraday::TimeoutError) { execute_request(env, rack_env) }
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)
@session.request(env[:url].to_s, rack_env)
end
end
end
end