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mastodon
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mastodon/app/services/subscribe_service.rb

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# frozen_string_literal: true
class SubscribeService < BaseService
def call(account)
account.secret = SecureRandom.hex
subscription = account.subscription(api_subscription_url(account.id))
response = subscription.subscribe
if response_failed_permanently?(response)
# An error in the 4xx range (except for 429, which is rate limiting)
# means we're not allowed to subscribe. Fail and move on
account.secret = ''
account.save!
elsif response_successful?(response)
# Anything in the 2xx range means the subscription will be confirmed
# asynchronously, we've done what we needed to do
account.save!
else
# What's left is the 5xx range and 429, which means we need to retry
# at a later time. Fail loudly!
raise "Subscription attempt failed for #{account.acct} (#{account.hub_url}): HTTP #{response.code}"
end
end
private
def response_failed_permanently?(response)
response.code > 299 && response.code < 500 && response.code != 429
end
def response_successful?(response)
response.code > 199 && response.code < 300
end
end