mirror of
https://github.com/funamitech/mastodon
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Extract WebPushRequest
from push notification worker and subscription (#32208)
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72
app/lib/web_push_request.rb
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72
app/lib/web_push_request.rb
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@ -0,0 +1,72 @@
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# frozen_string_literal: true
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class WebPushRequest
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SIGNATURE_ALGORITHM = 'p256ecdsa'
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AUTH_HEADER = 'WebPush'
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PAYLOAD_EXPIRATION = 24.hours
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JWT_ALGORITHM = 'ES256'
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JWT_TYPE = 'JWT'
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attr_reader :web_push_subscription
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delegate(
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:endpoint,
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:key_auth,
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:key_p256dh,
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to: :web_push_subscription
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)
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def initialize(web_push_subscription)
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@web_push_subscription = web_push_subscription
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end
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def audience
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@audience ||= Addressable::URI.parse(endpoint).normalized_site
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end
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def authorization_header
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[AUTH_HEADER, encoded_json_web_token].join(' ')
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end
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def crypto_key_header
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[SIGNATURE_ALGORITHM, vapid_key.public_key_for_push_header].join('=')
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end
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def encrypt(payload)
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Webpush::Encryption.encrypt(payload, key_p256dh, key_auth)
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end
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private
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def encoded_json_web_token
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JWT.encode(
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web_token_payload,
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vapid_key.curve,
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JWT_ALGORITHM,
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typ: JWT_TYPE
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)
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end
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def web_token_payload
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{
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aud: audience,
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exp: PAYLOAD_EXPIRATION.from_now.to_i,
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sub: payload_subject,
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}
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end
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def payload_subject
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[:mailto, contact_email].join(':')
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end
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def vapid_key
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@vapid_key ||= Webpush::VapidKey.from_keys(
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Rails.configuration.x.vapid_public_key,
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Rails.configuration.x.vapid_private_key
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)
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end
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def contact_email
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@contact_email ||= ::Setting.site_contact_email
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end
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end
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@ -29,26 +29,6 @@ class Web::PushSubscription < ApplicationRecord
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delegate :locale, to: :associated_user
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def encrypt(payload)
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Webpush::Encryption.encrypt(payload, key_p256dh, key_auth)
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end
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def audience
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@audience ||= Addressable::URI.parse(endpoint).normalized_site
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end
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def crypto_key_header
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p256ecdsa = vapid_key.public_key_for_push_header
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"p256ecdsa=#{p256ecdsa}"
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end
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def authorization_header
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jwt = JWT.encode({ aud: audience, exp: 24.hours.from_now.to_i, sub: "mailto:#{contact_email}" }, vapid_key.curve, 'ES256', typ: 'JWT')
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"WebPush #{jwt}"
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end
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def pushable?(notification)
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policy_allows_notification?(notification) && alert_enabled_for_notification_type?(notification)
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end
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@ -92,14 +72,6 @@ class Web::PushSubscription < ApplicationRecord
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)
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end
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def vapid_key
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@vapid_key ||= Webpush::VapidKey.from_keys(Rails.configuration.x.vapid_public_key, Rails.configuration.x.vapid_private_key)
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end
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def contact_email
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@contact_email ||= ::Setting.site_contact_email
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end
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def alert_enabled_for_notification_type?(notification)
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truthy?(data&.dig('alerts', notification.type.to_s))
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end
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@ -16,10 +16,10 @@ class Web::PushNotificationWorker
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# in the meantime, so we have to double-check before proceeding
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return unless @notification.activity.present? && @subscription.pushable?(@notification)
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payload = @subscription.encrypt(push_notification_json)
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payload = web_push_request.encrypt(push_notification_json)
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request_pool.with(@subscription.audience) do |http_client|
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request = Request.new(:post, @subscription.endpoint, body: payload.fetch(:ciphertext), http_client: http_client)
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request_pool.with(web_push_request.audience) do |http_client|
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request = Request.new(:post, web_push_request.endpoint, body: payload.fetch(:ciphertext), http_client: http_client)
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request.add_headers(
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'Content-Type' => 'application/octet-stream',
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@ -27,8 +27,8 @@ class Web::PushNotificationWorker
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'Urgency' => URGENCY,
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'Content-Encoding' => 'aesgcm',
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'Encryption' => "salt=#{Webpush.encode64(payload.fetch(:salt)).delete('=')}",
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'Crypto-Key' => "dh=#{Webpush.encode64(payload.fetch(:server_public_key)).delete('=')};#{@subscription.crypto_key_header}",
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'Authorization' => @subscription.authorization_header
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'Crypto-Key' => "dh=#{Webpush.encode64(payload.fetch(:server_public_key)).delete('=')};#{web_push_request.crypto_key_header}",
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'Authorization' => web_push_request.authorization_header
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)
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request.perform do |response|
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@ -50,17 +50,27 @@ class Web::PushNotificationWorker
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private
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def web_push_request
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@web_push_request || WebPushRequest.new(@subscription)
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end
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def push_notification_json
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json = I18n.with_locale(@subscription.locale.presence || I18n.default_locale) do
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Oj.dump(serialized_notification_in_subscription_locale.as_json)
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end
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def serialized_notification_in_subscription_locale
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I18n.with_locale(@subscription.locale.presence || I18n.default_locale) do
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serialized_notification
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end
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end
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def serialized_notification
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ActiveModelSerializers::SerializableResource.new(
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@notification,
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serializer: Web::NotificationSerializer,
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scope: @subscription,
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scope_name: :current_push_subscription
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).as_json
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end
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Oj.dump(json)
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)
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end
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def request_pool
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@ -22,19 +22,38 @@ RSpec.describe Web::PushNotificationWorker do
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let(:payload) { { ciphertext: ciphertext, salt: salt, server_public_key: server_public_key, shared_secret: shared_secret } }
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describe 'perform' do
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around do |example|
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original_private = Rails.configuration.x.vapid_private_key
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original_public = Rails.configuration.x.vapid_public_key
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Rails.configuration.x.vapid_private_key = vapid_private_key
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Rails.configuration.x.vapid_public_key = vapid_public_key
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example.run
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Rails.configuration.x.vapid_private_key = original_private
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Rails.configuration.x.vapid_public_key = original_public
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end
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before do
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allow(subscription).to receive_messages(contact_email: contact_email, vapid_key: vapid_key)
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allow(Web::PushSubscription).to receive(:find).with(subscription.id).and_return(subscription)
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Setting.site_contact_email = contact_email
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allow(Webpush::Encryption).to receive(:encrypt).and_return(payload)
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allow(JWT).to receive(:encode).and_return('jwt.encoded.payload')
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stub_request(:post, endpoint).to_return(status: 201, body: '')
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subject.perform(subscription.id, notification.id)
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end
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it 'calls the relevant service with the correct headers' do
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expect(a_request(:post, endpoint).with(headers: {
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subject.perform(subscription.id, notification.id)
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expect(web_push_endpoint_request)
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.to have_been_made
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end
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def web_push_endpoint_request
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a_request(
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:post,
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endpoint
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).with(
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headers: {
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'Content-Encoding' => 'aesgcm',
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'Content-Type' => 'application/octet-stream',
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'Crypto-Key' => "dh=BAgtUks5d90kFmxGevk9tH7GEmvz9DB0qcEMUsOBgKwMf-TMjsKIIG6LQvGcFAf6jcmAod15VVwmYwGIIxE4VWE;p256ecdsa=#{vapid_public_key.delete('=')}",
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@ -42,7 +61,9 @@ RSpec.describe Web::PushNotificationWorker do
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'Ttl' => '172800',
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'Urgency' => 'normal',
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'Authorization' => 'WebPush jwt.encoded.payload',
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}, 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
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},
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body: "+\xB8\xDBT}\u0013\xB6\xDD.\xF9\xB0\xA7\xC8Ҁ\xFD\x99#\xF7\xAC\x83\xA4\xDB,\u001F\xB5\xB9w\x85>\xF7\xADr"
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)
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end
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end
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end
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