Fix webfinger retries (#4275)

* Do not raise unretryable exceptions in ResolveRemoteAccountService

* Removed fatal exceptions from ResolveRemoteAccountService

Exceptions that cannot be retried should not be raised. New exception
class for those that can be retried (Mastodon::UnexpectedResponseError)
This commit is contained in:
Eugen Rochko 2017-07-20 01:59:07 +02:00 committed by GitHub
parent f24b81e27f
commit 1fcdaafa6f
14 changed files with 40 additions and 39 deletions

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@ -17,11 +17,7 @@ class Api::BaseController < ApplicationController
render json: { error: 'Record not found' }, status: 404
end
rescue_from Goldfinger::Error do
render json: { error: 'Remote account could not be resolved' }, status: 422
end
rescue_from HTTP::Error do
rescue_from HTTP::Error, Mastodon::UnexpectedResponseError do
render json: { error: 'Remote data could not be fetched' }, status: 503
end

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@ -5,4 +5,14 @@ module Mastodon
class NotPermittedError < Error; end
class ValidationError < Error; end
class RaceConditionError < Error; end
class UnexpectedResponseError < Error
def initialize(response = nil)
@response = response
end
def to_s
"#{@response.uri} returned code #{@response.code}"
end
end
end

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@ -32,8 +32,5 @@ class FetchRemoteAccountService < BaseService
rescue Nokogiri::XML::XPath::SyntaxError
Rails.logger.debug 'Invalid XML or missing namespace'
nil
rescue Goldfinger::NotFoundError, Goldfinger::Error
Rails.logger.debug 'Exceptions related to Goldfinger occurs'
nil
end
end

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@ -33,9 +33,6 @@ class FetchRemoteStatusService < BaseService
rescue Nokogiri::XML::XPath::SyntaxError
Rails.logger.debug 'Invalid XML or missing namespace'
nil
rescue Goldfinger::NotFoundError, Goldfinger::Error
Rails.logger.debug 'Exceptions related to Goldfinger occurs'
nil
end
def confirmed_domain?(domain, account)

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@ -47,7 +47,7 @@ class ProcessInteractionService < BaseService
reflect_unblock!(account, target_account)
end
end
rescue Goldfinger::Error, HTTP::Error, OStatus2::BadSalmonError, Mastodon::NotPermittedError
rescue HTTP::Error, OStatus2::BadSalmonError, Mastodon::NotPermittedError
nil
end

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@ -23,18 +23,19 @@ class ResolveRemoteAccountService < BaseService
@webfinger = Goldfinger.finger("acct:#{uri}")
raise Goldfinger::Error, 'Missing resource links' if links_missing?
confirmed_username, confirmed_domain = @webfinger.subject.gsub(/\Aacct:/, '').split('@')
if confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero?
@username = confirmed_username
@domain = confirmed_domain
elsif redirected.nil?
return call("#{confirmed_username}@#{confirmed_domain}", update_profile, true)
else
return call("#{confirmed_username}@#{confirmed_domain}", update_profile, true) if redirected.nil?
raise Goldfinger::Error, 'Requested and returned acct URIs do not match'
Rails.logger.debug 'Requested and returned acct URIs do not match'
return
end
return if links_missing?
return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
RedisLock.acquire(lock_options) do |lock|
@ -49,6 +50,9 @@ class ResolveRemoteAccountService < BaseService
end
@account
rescue Goldfinger::Error => e
Rails.logger.debug "Webfinger query for #{uri} unsuccessful: #{e}"
nil
end
private
@ -57,7 +61,9 @@ class ResolveRemoteAccountService < BaseService
@webfinger.link('http://schemas.google.com/g/2010#updates-from').nil? ||
@webfinger.link('salmon').nil? ||
@webfinger.link('http://webfinger.net/rel/profile-page').nil? ||
@webfinger.link('magic-public-key').nil?
@webfinger.link('magic-public-key').nil? ||
canonical_uri.nil? ||
hub_url.nil?
end
def webfinger_update_due?
@ -123,19 +129,14 @@ class ResolveRemoteAccountService < BaseService
author_uri = owner.at_xpath('./xmlns:uri') unless owner.nil?
end
raise Goldfinger::Error, 'Author URI could not be found' if author_uri.nil?
@canonical_uri = author_uri.content
@canonical_uri = author_uri.nil? ? nil : author_uri.content
end
def hub_url
return @hub_url if defined?(@hub_url)
hubs = atom.xpath('//xmlns:link[@rel="hub"]')
raise Goldfinger::Error, 'No PubSubHubbub hubs found' if hubs.empty? || hubs.first['href'].nil?
@hub_url = hubs.first['href']
@hub_url = hubs.empty? || hubs.first['href'].nil? ? nil : hubs.first['href']
end
def atom_body
@ -143,7 +144,7 @@ class ResolveRemoteAccountService < BaseService
response = Request.new(:get, atom_url).perform
raise Goldfinger::Error, "Feed attempt failed for #{atom_url}: HTTP #{response.code}" unless response.code == 200
raise Mastodon::UnexpectedResponseError, response unless response.code == 200
@atom_body = response.to_s
end

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@ -14,7 +14,7 @@ class SendInteractionService < BaseService
delivery = build_request.perform
raise "Delivery failed for #{target_account.salmon_url}: HTTP #{delivery.code}" unless delivery.code > 199 && delivery.code < 300
raise Mastodon::UnexpectedResponseError, delivery unless delivery.code > 199 && delivery.code < 300
end
private

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@ -18,7 +18,7 @@ class SubscribeService < BaseService
else
# The response was either a 429 rate limit, or a 5xx error.
# We need to retry at a later time. Fail loudly!
raise "Subscription attempt failed for #{@account.acct} (#{@account.hub_url}): HTTP #{@response.code}"
raise Mastodon::UnexpectedResponseError, @response
end
end

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@ -44,7 +44,7 @@ class ImportWorker
target_account = ResolveRemoteAccountService.new.call(row.first)
next if target_account.nil?
MuteService.new.call(from_account, target_account)
rescue Goldfinger::Error, HTTP::Error, OpenSSL::SSL::SSLError
rescue Mastodon::UnexpectedResponseError, HTTP::Error, OpenSSL::SSL::SSLError
next
end
end
@ -56,7 +56,7 @@ class ImportWorker
target_account = ResolveRemoteAccountService.new.call(row.first)
next if target_account.nil?
BlockService.new.call(from_account, target_account)
rescue Goldfinger::Error, HTTP::Error, OpenSSL::SSL::SSLError
rescue Mastodon::UnexpectedResponseError, HTTP::Error, OpenSSL::SSL::SSLError
next
end
end
@ -66,7 +66,7 @@ class ImportWorker
import_rows.each do |row|
begin
FollowService.new.call(from_account, row.first)
rescue Mastodon::NotPermittedError, ActiveRecord::RecordNotFound, Goldfinger::Error, HTTP::Error, OpenSSL::SSL::SSLError
rescue Mastodon::NotPermittedError, ActiveRecord::RecordNotFound, Mastodon::UnexpectedResponseError, HTTP::Error, OpenSSL::SSL::SSLError
next
end
end

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@ -23,7 +23,7 @@ class Pubsubhubbub::DeliveryWorker
def process_delivery
payload_delivery
raise "Delivery failed for #{subscription.callback_url}: HTTP #{payload_delivery.code}" unless response_successful?
raise Mastodon::UnexpectedResponseError, payload_delivery unless response_successful?
subscription.touch(:last_successful_delivery_at)
end

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@ -32,7 +32,7 @@ describe Api::BaseController do
ActiveRecord::RecordInvalid => 422,
Mastodon::ValidationError => 422,
ActiveRecord::RecordNotFound => 404,
Goldfinger::Error => 422,
Mastodon::UnexpectedResponseError => 503,
HTTP::Error => 503,
OpenSSL::SSL::SSLError => 503,
Mastodon::NotPermittedError => 403,

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@ -22,11 +22,11 @@ RSpec.describe ResolveRemoteAccountService do
end
it 'raises error if no such user can be resolved via webfinger' do
expect { subject.call('catsrgr8@quitter.no') }.to raise_error Goldfinger::Error
expect(subject.call('catsrgr8@quitter.no')).to be_nil
end
it 'raises error if the domain does not have webfinger' do
expect { subject.call('catsrgr8@example.com') }.to raise_error Goldfinger::Error
expect(subject.call('catsrgr8@example.com')).to be_nil
end
it 'returns an already existing remote account' do
@ -58,7 +58,7 @@ RSpec.describe ResolveRemoteAccountService do
end
it 'prevents hijacking inexisting accounts' do
expect { subject.call('hacker2@redirected.com') }.to raise_error Goldfinger::Error
expect(subject.call('hacker2@redirected.com')).to be_nil
end
it 'returns a new remote account' do

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@ -33,11 +33,11 @@ RSpec.describe SubscribeService do
it 'fails loudly if PuSH hub is unavailable' do
stub_request(:post, 'http://hub.example.com/').to_return(status: 503)
expect { subject.call(account) }.to raise_error(/Subscription attempt failed/)
expect { subject.call(account) }.to raise_error Mastodon::UnexpectedResponseError
end
it 'fails loudly if rate limited' do
stub_request(:post, 'http://hub.example.com/').to_return(status: 429)
expect { subject.call(account) }.to raise_error(/Subscription attempt failed/)
expect { subject.call(account) }.to raise_error Mastodon::UnexpectedResponseError
end
end

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@ -26,7 +26,7 @@ describe Pubsubhubbub::DeliveryWorker do
subscription = Fabricate(:subscription)
stub_request_to_respond_with(subscription, 500)
expect { subject.perform(subscription.id, payload) }.to raise_error(/Delivery failed/)
expect { subject.perform(subscription.id, payload) }.to raise_error Mastodon::UnexpectedResponseError
end
it 'updates subscriptions when delivery succeeds' do