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class ActionMailbox::Ingresses::Mandrill::InboundEmailsController < ActionMailbox::BaseController
before_action :ensure_authenticated
def create
raw_emails.each { |raw_email| ActionMailbox::InboundEmail.create_and_extract_message_id! raw_email }
head :ok
rescue JSON::ParserError => error
log.error error.message
head :unprocessable_entity
end
private
def raw_emails
events.lazy.
select { |event| event["event"] == "inbound" }.
collect { |event| event.dig("msg", "raw_msg") }
end
def events
JSON.parse params.require(:mandrill_events)
end
def ensure_authenticated
head :unauthorized unless authenticated?
end
def authenticated?
Authenticator.new(request).authenticated?
end
class Authenticator
cattr_accessor :key
attr_reader :request
def initialize(request)
@request = request
end
def authenticated?
ActiveSupport::SecurityUtils.secure_compare given_signature, expected_signature
end
private
def given_signature
request.headers["X-Mandrill-Signature"]
end
def expected_signature
Base64.encode64(OpenSSL::HMAC.digest(OpenSSL::Digest::SHA1.new, key, message)).strip
end
def message
[ request.original_url, request.POST.sort ].flatten.join
end
end
end
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