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# frozen_string_literal: true
class Pubsubhubbub::DeliveryWorker
include Sidekiq::Worker
include RoutingHelper
sidekiq_options queue: 'push', retry: 3, dead: false
sidekiq_retry_in do |count|
5 * (count + 1)
end
attr_reader :subscription, :payload
def perform(subscription_id, payload)
@subscription = Subscription.find(subscription_id)
@payload = payload
process_delivery unless blocked_domain?
end
private
def process_delivery
payload_delivery
raise "Delivery failed for #{subscription.callback_url}: HTTP #{payload_delivery.code}" unless response_successful?
subscription.touch(:last_successful_delivery_at)
end
def payload_delivery
@_payload_delivery ||= callback_post_payload
end
def callback_post_payload
HTTP.timeout(:per_operation, write: 50, connect: 20, read: 50)
.headers(headers)
.post(subscription.callback_url, body: payload)
end
def blocked_domain?
DomainBlock.blocked?(host)
end
def host
Addressable::URI.parse(subscription.callback_url).normalize.host
end
def headers
{
'User-Agent' => 'Mastodon/PubSubHubbub',
'Content-Type' => 'application/atom+xml',
'Link' => link_headers,
}.merge(signature_headers.to_h)
end
def link_headers
LinkHeader.new([hub_link_header, self_link_header]).to_s
end
def hub_link_header
[api_push_url, [%w(rel hub)]]
end
def self_link_header
[account_url(subscription.account, format: :atom), [%w(rel self)]]
end
def signature_headers
{ 'X-Hub-Signature' => payload_signature } if subscription.secret?
end
def payload_signature
"sha1=#{hmac_payload_digest}"
end
def hmac_payload_digest
OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha1'), subscription.secret, payload)
end
def response_successful?
payload_delivery.code > 199 && payload_delivery.code < 300
end
end
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