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web_request_concern.rb 1.7KB

    require 'faraday' require 'faraday_middleware' module WebRequestConcern extend ActiveSupport::Concern def validate_web_request_options! if options['user_agent'].present? errors.add(:base, "user_agent must be a string") unless options['user_agent'].is_a?(String) end unless headers(options['headers']).is_a?(Hash) errors.add(:base, "if provided, headers must be a hash") end begin basic_auth_credentials(options['basic_auth']) rescue ArgumentError => e errors.add(:base, e.message) end end def faraday @faraday ||= Faraday.new { |builder| builder.headers = headers if headers.length > 0 builder.headers[:user_agent] = user_agent builder.use FaradayMiddleware::FollowRedirects builder.request :url_encoded if userinfo = basic_auth_credentials builder.request :basic_auth, *userinfo end case backend = faraday_backend when :typhoeus require 'typhoeus/adapters/faraday' end builder.adapter backend } end def headers(value = interpolated['headers']) value.presence || {} end def basic_auth_credentials(value = interpolated['basic_auth']) case value when nil, '' return nil when Array return value if value.size == 2 when /:/ return value.split(/:/, 2) end raise ArgumentError.new("bad value for basic_auth: #{value.inspect}") end def faraday_backend ENV.fetch('FARADAY_HTTP_BACKEND', 'typhoeus').to_sym end def user_agent interpolated['user_agent'].presence || self.class.default_user_agent end module ClassMethods def default_user_agent ENV.fetch('DEFAULT_HTTP_USER_AGENT', Faraday.new.headers[:user_agent]) end end end