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Change Web Push API deliveries to use request pooling (#16014)

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This commit is contained in:
Eugen Rochko
2021-04-12 14:25:34 +02:00
committed by GitHub
parent 463875f645
commit 120965eb0b
5 changed files with 150 additions and 58 deletions
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2
Gemfile
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@ -94,7 +94,7 @@ gem 'tty-prompt', '~> 0.23', require: false
gem 'twitter-text', '~> 3.1.0'
gem 'tzinfo-data', '~> 1.2021'
gem 'webpacker', '~> 5.2'
gem 'webpush'
gem 'webpush', '~> 0.3'
gem 'webauthn', '~> 3.0.0.alpha1'
gem 'json-ld'

2
Gemfile.lock
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@ -808,5 +808,5 @@ DEPENDENCIES
webauthn (~> 3.0.0.alpha1)
webmock (~> 3.12)
webpacker (~> 5.2)
webpush
webpush (~> 0.3)
xorcist (~> 1.1)

91
app/models/web/push_subscription.rb
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@ -24,81 +24,80 @@ class Web::PushSubscription < ApplicationRecord
validates :key_p256dh, presence: true
validates :key_auth, presence: true
def push(notification)
I18n.with_locale(associated_user&.locale || I18n.default_locale) do
push_payload(payload_for_notification(notification), 48.hours.seconds)
end
delegate :locale, to: :associated_user
def encrypt(payload)
Webpush::Encryption.encrypt(payload, key_p256dh, key_auth)
end
def audience
@audience ||= Addressable::URI.parse(endpoint).normalized_site
end
def crypto_key_header
p256ecdsa = vapid_key.public_key_for_push_header
"p256ecdsa=#{p256ecdsa}"
end
def authorization_header
jwt = JWT.encode({ aud: audience, exp: 24.hours.from_now.to_i, sub: "mailto:#{contact_email}" }, vapid_key.curve, 'ES256', typ: 'JWT')
"WebPush #{jwt}"
end
def pushable?(notification)
data&.key?('alerts') && ActiveModel::Type::Boolean.new.cast(data['alerts'][notification.type.to_s])
ActiveModel::Type::Boolean.new.cast(data&.dig('alerts', notification.type.to_s))
end
def associated_user
return @associated_user if defined?(@associated_user)
@associated_user = if user_id.nil?
session_activation.user
else
user
end
@associated_user = begin
if user_id.nil?
session_activation.user
else
user
end
end
end
def associated_access_token
return @associated_access_token if defined?(@associated_access_token)
@associated_access_token = if access_token_id.nil?
find_or_create_access_token.token
else
access_token.token
end
@associated_access_token = begin
if access_token_id.nil?
find_or_create_access_token.token
else
access_token.token
end
end
end
class << self
def unsubscribe_for(application_id, resource_owner)
access_token_ids = Doorkeeper::AccessToken.where(application_id: application_id, resource_owner_id: resource_owner.id, revoked_at: nil)
.pluck(:id)
access_token_ids = Doorkeeper::AccessToken.where(application_id: application_id, resource_owner_id: resource_owner.id, revoked_at: nil).pluck(:id)
where(access_token_id: access_token_ids).delete_all
end
end
private
def push_payload(message, ttl = 5.minutes.seconds)
Webpush.payload_send(
message: Oj.dump(message),
endpoint: endpoint,
p256dh: key_p256dh,
auth: key_auth,
ttl: ttl,
ssl_timeout: 10,
open_timeout: 10,
read_timeout: 10,
vapid: {
subject: "mailto:#{::Setting.site_contact_email}",
private_key: Rails.configuration.x.vapid_private_key,
public_key: Rails.configuration.x.vapid_public_key,
}
)
end
def payload_for_notification(notification)
ActiveModelSerializers::SerializableResource.new(
notification,
serializer: Web::NotificationSerializer,
scope: self,
scope_name: :current_push_subscription
).as_json
end
def find_or_create_access_token
Doorkeeper::AccessToken.find_or_create_for(
application: Doorkeeper::Application.find_by(superapp: true),
resource_owner: session_activation.user_id,
resource_owner: user_id || session_activation.user_id,
scopes: Doorkeeper::OAuth::Scopes.from_string('read write follow push'),
expires_in: Doorkeeper.configuration.access_token_expires_in,
use_refresh_token: Doorkeeper.configuration.refresh_token_enabled?
)
end
def vapid_key
@vapid_key ||= Webpush::VapidKey.from_keys(Rails.configuration.x.vapid_public_key, Rails.configuration.x.vapid_private_key)
end
def contact_email
@contact_email ||= ::Setting.site_contact_email
end
end

65
app/workers/web/push_notification_worker.rb
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@ -3,22 +3,67 @@
class Web::PushNotificationWorker
include Sidekiq::Worker
sidekiq_options backtrace: true, retry: 5
sidekiq_options queue: 'push', retry: 5
TTL = 48.hours.to_s
URGENCY = 'normal'
def perform(subscription_id, notification_id)
subscription = ::Web::PushSubscription.find(subscription_id)
notification = Notification.find(notification_id)
@subscription = Web::PushSubscription.find(subscription_id)
@notification = Notification.find(notification_id)
subscription.push(notification) unless notification.activity.nil?
rescue Webpush::ResponseError => e
code = e.response.code.to_i
# Polymorphically associated activity could have been deleted
# in the meantime, so we have to double-check before proceeding
return unless @notification.activity.present? && @subscription.pushable?(@notification)
if (400..499).cover?(code) && ![408, 429].include?(code)
subscription.destroy!
else
raise e
payload = @subscription.encrypt(push_notification_json)
request_pool.with(@subscription.audience) do |http_client|
request = Request.new(:post, @subscription.endpoint, body: payload.fetch(:ciphertext), http_client: http_client)
request.add_headers(
'Content-Type' => 'application/octet-stream',
'Ttl' => TTL,
'Urgency' => URGENCY,
'Content-Encoding' => 'aesgcm',
'Encryption' => "salt=#{Webpush.encode64(payload.fetch(:salt)).delete('=')}",
'Crypto-Key' => "dh=#{Webpush.encode64(payload.fetch(:server_public_key)).delete('=')};#{@subscription.crypto_key_header}",
'Authorization' => @subscription.authorization_header
)
request.perform do |response|
# If the server responds with an error in the 4xx range
# that isn't about rate-limiting or timeouts, we can
# assume that the subscription is invalid or expired
# and must be removed
if (400..499).cover?(response.code) && ![408, 429].include?(response.code)
@subscription.destroy!
elsif !(200...300).cover?(response.code)
raise Mastodon::UnexpectedResponseError, response
end
end
end
rescue ActiveRecord::RecordNotFound
true
end
private
def push_notification_json
json = I18n.with_locale(@subscription.locale || I18n.default_locale) do
ActiveModelSerializers::SerializableResource.new(
@notification,
serializer: Web::NotificationSerializer,
scope: @subscription,
scope_name: :current_push_subscription
).as_json
end
Oj.dump(json)
end
def request_pool
RequestPool.current
end
end

48
spec/workers/web/push_notification_worker_spec.rb Normal file
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@ -0,0 +1,48 @@
# frozen_string_literal: true
require 'rails_helper'
describe Web::PushNotificationWorker do
subject { described_class.new }
let(:p256dh) { 'BN4GvZtEZiZuqFxSKVZfSfluwKBD7UxHNBmWkfiZfCtgDE8Bwh-_MtLXbBxTBAWH9r7IPKL0lhdcaqtL1dfxU5E=' }
let(:auth) { 'Q2BoAjC09xH3ywDLNJr-dA==' }
let(:endpoint) { 'https://updates.push.services.mozilla.com/push/v1/subscription-id' }
let(:user) { Fabricate(:user) }
let(:notification) { Fabricate(:notification) }
let(:subscription) { Fabricate(:web_push_subscription, user_id: user.id, key_p256dh: p256dh, key_auth: auth, endpoint: endpoint, data: { alerts: { notification.type => true } }) }
let(:vapid_public_key) { 'BB37UCyc8LLX4PNQSe-04vSFvpUWGrENubUaslVFM_l5TxcGVMY0C3RXPeUJAQHKYlcOM2P4vTYmkoo0VZGZTM4=' }
let(:vapid_private_key) { 'OPrw1Sum3gRoL4-DXfSCC266r-qfFSRZrnj8MgIhRHg=' }
let(:vapid_key) { Webpush::VapidKey.from_keys(vapid_public_key, vapid_private_key) }
let(:contact_email) { 'sender@example.com' }
let(:ciphertext) { "+\xB8\xDBT}\x13\xB6\xDD.\xF9\xB0\xA7\xC8\xD2\x80\xFD\x99#\xF7\xAC\x83\xA4\xDB,\x1F\xB5\xB9w\x85>\xF7\xADr" }
let(:salt) { "X\x97\x953\xE4X\xF8_w\xE7T\x95\xC51q\xFE" }
let(:server_public_key) { "\x04\b-RK9w\xDD$\x16lFz\xF9=\xB4~\xC6\x12k\xF3\xF40t\xA9\xC1\fR\xC3\x81\x80\xAC\f\x7F\xE4\xCC\x8E\xC2\x88 n\x8BB\xF1\x9C\x14\a\xFA\x8D\xC9\x80\xA1\xDDyU\\&c\x01\x88#\x118Ua" }
let(:shared_secret) { "\t\xA7&\x85\t\xC5m\b\xA8\xA7\xF8B{1\xADk\xE1y'm\xEDE\xEC\xDD\xEDj\xB3$s\xA9\xDA\xF0" }
let(:payload) { { ciphertext: ciphertext, salt: salt, server_public_key: server_public_key, shared_secret: shared_secret } }
describe 'perform' do
before do
allow_any_instance_of(subscription.class).to receive(:contact_email).and_return(contact_email)
allow_any_instance_of(subscription.class).to receive(:vapid_key).and_return(vapid_key)
allow(Webpush::Encryption).to receive(:encrypt).and_return(payload)
allow(JWT).to receive(:encode).and_return('jwt.encoded.payload')
stub_request(:post, endpoint).to_return(status: 201, body: '')
subject.perform(subscription.id, notification.id)
end
it 'calls the relevant service with the correct headers' do
expect(a_request(:post, endpoint).with(headers: {
'Content-Encoding' => 'aesgcm',
'Content-Type' => 'application/octet-stream',
'Crypto-Key' => 'dh=BAgtUks5d90kFmxGevk9tH7GEmvz9DB0qcEMUsOBgKwMf-TMjsKIIG6LQvGcFAf6jcmAod15VVwmYwGIIxE4VWE;p256ecdsa=' + vapid_public_key.delete('='),
'Encryption' => 'salt=WJeVM-RY-F9351SVxTFx_g',
'Ttl' => '172800',
'Urgency' => 'normal',
'Authorization' => 'WebPush jwt.encoded.payload',
}, body: "+\xB8\xDBT}\u0013\xB6\xDD.\xF9\xB0\xA7\xC8Ҁ\xFD\x99#\xF7\xAC\x83\xA4\xDB,\u001F\xB5\xB9w\x85>\xF7\xADr")).to have_been_made
end
end
end