forked from berserker/microblog
Refactor ActivityPub handling to prepare for non-Account actors (#19212)
* Move ActivityPub::FetchRemoteAccountService to ActivityPub::FetchRemoteActorService ActivityPub::FetchRemoteAccountService is kept as a wrapper for when the actor is specifically required to be an Account * Refactor SignatureVerification to allow non-Account actors * fixup! Move ActivityPub::FetchRemoteAccountService to ActivityPub::FetchRemoteActorService * Refactor ActivityPub::FetchRemoteKeyService to potentially return non-Account actors * Refactor inbound ActivityPub payload processing to accept non-Account actors * Refactor inbound ActivityPub processing to accept activities relayed through non-Account * Refactor how Account key URIs are built * Refactor Request and drop unused key_id_format parameter * Rename ActivityPub::Dereferencer `signature_account` to `signature_actor`main
parent
84aff598ea
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41 changed files with 436 additions and 180 deletions
@ -1,80 +1,12 @@ |
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# frozen_string_literal: true |
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class ActivityPub::FetchRemoteAccountService < BaseService |
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include JsonLdHelper |
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include DomainControlHelper |
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include WebfingerHelper |
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class Error < StandardError; end |
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SUPPORTED_TYPES = %w(Application Group Organization Person Service).freeze |
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class ActivityPub::FetchRemoteAccountService < ActivityPub::FetchRemoteActorService |
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# Does a WebFinger roundtrip on each call, unless `only_key` is true |
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def call(uri, id: true, prefetched_body: nil, break_on_redirect: false, only_key: false, suppress_errors: true) |
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return if domain_not_allowed?(uri) |
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return ActivityPub::TagManager.instance.uri_to_resource(uri, Account) if ActivityPub::TagManager.instance.local_uri?(uri) |
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@json = begin |
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if prefetched_body.nil? |
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fetch_resource(uri, id) |
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else |
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body_to_json(prefetched_body, compare_id: id ? uri : nil) |
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end |
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rescue Oj::ParseError |
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raise Error, "Error parsing JSON-LD document #{uri}" |
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end |
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raise Error, "Error fetching actor JSON at #{uri}" if @json.nil? |
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raise Error, "Unsupported JSON-LD context for document #{uri}" unless supported_context? |
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raise Error, "Unexpected object type for actor #{uri} (expected any of: #{SUPPORTED_TYPES})" unless expected_type? |
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raise Error, "Actor #{uri} has moved to #{@json['movedTo']}" if break_on_redirect && @json['movedTo'].present? |
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@uri = @json['id'] |
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@username = @json['preferredUsername'] |
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@domain = Addressable::URI.parse(@uri).normalized_host |
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check_webfinger! unless only_key |
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ActivityPub::ProcessAccountService.new.call(@username, @domain, @json, only_key: only_key, verified_webfinger: !only_key) |
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rescue Error => e |
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Rails.logger.debug "Fetching account #{uri} failed: #{e.message}" |
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raise unless suppress_errors |
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end |
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private |
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def check_webfinger! |
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webfinger = webfinger!("acct:#{@username}@#{@domain}") |
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confirmed_username, confirmed_domain = split_acct(webfinger.subject) |
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if @username.casecmp(confirmed_username).zero? && @domain.casecmp(confirmed_domain).zero? |
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raise Error, "Webfinger response for #{@username}@#{@domain} does not loop back to #{@uri}" if webfinger.link('self', 'href') != @uri |
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return |
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end |
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webfinger = webfinger!("acct:#{confirmed_username}@#{confirmed_domain}") |
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@username, @domain = split_acct(webfinger.subject) |
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unless confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero? |
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raise Webfinger::RedirectError, "Too many webfinger redirects for URI #{uri} (stopped at #{@username}@#{@domain})" |
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end |
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raise Error, "Webfinger response for #{@username}@#{@domain} does not loop back to #{@uri}" if webfinger.link('self', 'href') != @uri |
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rescue Webfinger::RedirectError => e |
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raise Error, e.message |
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rescue Webfinger::Error => e |
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raise Error, "Webfinger error when resolving #{@username}@#{@domain}: #{e.message}" |
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end |
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def split_acct(acct) |
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acct.gsub(/\Aacct:/, '').split('@') |
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end |
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def supported_context? |
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super(@json) |
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end |
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actor = super |
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return actor if actor.nil? || actor.is_a?(Account) |
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def expected_type? |
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equals_or_includes_any?(@json['type'], SUPPORTED_TYPES) |
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Rails.logger.debug "Fetching account #{uri} failed: Expected Account, got #{actor.class.name}" |
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raise Error, "Expected Account, got #{actor.class.name}" unless suppress_errors |
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end |
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end |
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@ -0,0 +1,80 @@ |
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# frozen_string_literal: true |
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class ActivityPub::FetchRemoteActorService < BaseService |
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include JsonLdHelper |
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include DomainControlHelper |
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include WebfingerHelper |
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class Error < StandardError; end |
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SUPPORTED_TYPES = %w(Application Group Organization Person Service).freeze |
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# Does a WebFinger roundtrip on each call, unless `only_key` is true |
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def call(uri, id: true, prefetched_body: nil, break_on_redirect: false, only_key: false, suppress_errors: true) |
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return if domain_not_allowed?(uri) |
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return ActivityPub::TagManager.instance.uri_to_actor(uri) if ActivityPub::TagManager.instance.local_uri?(uri) |
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@json = begin |
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if prefetched_body.nil? |
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fetch_resource(uri, id) |
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else |
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body_to_json(prefetched_body, compare_id: id ? uri : nil) |
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end |
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rescue Oj::ParseError |
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raise Error, "Error parsing JSON-LD document #{uri}" |
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end |
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raise Error, "Error fetching actor JSON at #{uri}" if @json.nil? |
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raise Error, "Unsupported JSON-LD context for document #{uri}" unless supported_context? |
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raise Error, "Unexpected object type for actor #{uri} (expected any of: #{SUPPORTED_TYPES})" unless expected_type? |
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raise Error, "Actor #{uri} has moved to #{@json['movedTo']}" if break_on_redirect && @json['movedTo'].present? |
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@uri = @json['id'] |
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@username = @json['preferredUsername'] |
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@domain = Addressable::URI.parse(@uri).normalized_host |
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check_webfinger! unless only_key |
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ActivityPub::ProcessAccountService.new.call(@username, @domain, @json, only_key: only_key, verified_webfinger: !only_key) |
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rescue Error => e |
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Rails.logger.debug "Fetching actor #{uri} failed: #{e.message}" |
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raise unless suppress_errors |
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end |
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private |
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def check_webfinger! |
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webfinger = webfinger!("acct:#{@username}@#{@domain}") |
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confirmed_username, confirmed_domain = split_acct(webfinger.subject) |
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if @username.casecmp(confirmed_username).zero? && @domain.casecmp(confirmed_domain).zero? |
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raise Error, "Webfinger response for #{@username}@#{@domain} does not loop back to #{@uri}" if webfinger.link('self', 'href') != @uri |
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return |
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end |
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webfinger = webfinger!("acct:#{confirmed_username}@#{confirmed_domain}") |
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@username, @domain = split_acct(webfinger.subject) |
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unless confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero? |
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raise Webfinger::RedirectError, "Too many webfinger redirects for URI #{uri} (stopped at #{@username}@#{@domain})" |
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end |
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raise Error, "Webfinger response for #{@username}@#{@domain} does not loop back to #{@uri}" if webfinger.link('self', 'href') != @uri |
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rescue Webfinger::RedirectError => e |
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raise Error, e.message |
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rescue Webfinger::Error => e |
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raise Error, "Webfinger error when resolving #{@username}@#{@domain}: #{e.message}" |
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end |
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def split_acct(acct) |
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acct.gsub(/\Aacct:/, '').split('@') |
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end |
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def supported_context? |
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super(@json) |
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end |
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def expected_type? |
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equals_or_includes_any?(@json['type'], SUPPORTED_TYPES) |
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end |
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end |
@ -0,0 +1,180 @@ |
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require 'rails_helper' |
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RSpec.describe ActivityPub::FetchRemoteActorService, type: :service do |
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subject { ActivityPub::FetchRemoteActorService.new } |
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let!(:actor) do |
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{ |
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'@context': 'https://www.w3.org/ns/activitystreams', |
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id: 'https://example.com/alice', |
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type: 'Person', |
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preferredUsername: 'alice', |
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name: 'Alice', |
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summary: 'Foo bar', |
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inbox: 'http://example.com/alice/inbox', |
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} |
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end |
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describe '#call' do |
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let(:account) { subject.call('https://example.com/alice', id: true) } |
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shared_examples 'sets profile data' do |
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it 'returns an account' do |
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expect(account).to be_an Account |
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end |
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it 'sets display name' do |
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expect(account.display_name).to eq 'Alice' |
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end |
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it 'sets note' do |
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expect(account.note).to eq 'Foo bar' |
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end |
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it 'sets URL' do |
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expect(account.url).to eq 'https://example.com/alice' |
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end |
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end |
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context 'when the account does not have a inbox' do |
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let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice' }] } } |
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before do |
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actor[:inbox] = nil |
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stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor)) |
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stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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end |
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it 'fetches resource' do |
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account |
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expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once |
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end |
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it 'looks up webfinger' do |
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account |
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expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once |
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end |
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it 'returns nil' do |
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expect(account).to be_nil |
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end |
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end |
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context 'when URI and WebFinger share the same host' do |
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let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice' }] } } |
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before do |
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stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor)) |
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stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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end |
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it 'fetches resource' do |
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account |
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expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once |
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end |
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it 'looks up webfinger' do |
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account |
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expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once |
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end |
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it 'sets username and domain from webfinger' do |
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expect(account.username).to eq 'alice' |
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expect(account.domain).to eq 'example.com' |
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end |
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include_examples 'sets profile data' |
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end |
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context 'when WebFinger presents different domain than URI' do |
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let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/alice' }] } } |
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before do |
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stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor)) |
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stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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end |
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it 'fetches resource' do |
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account |
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expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once |
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end |
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it 'looks up webfinger' do |
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account |
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expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once |
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end |
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it 'looks up "redirected" webfinger' do |
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account |
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expect(a_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af')).to have_been_made.once |
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end |
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it 'sets username and domain from final webfinger' do |
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expect(account.username).to eq 'alice' |
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expect(account.domain).to eq 'iscool.af' |
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end |
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include_examples 'sets profile data' |
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end |
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context 'when WebFinger returns a different URI' do |
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let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/bob' }] } } |
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before do |
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stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor)) |
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stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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end |
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it 'fetches resource' do |
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account |
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expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once |
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end |
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it 'looks up webfinger' do |
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account |
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expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once |
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end |
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it 'does not create account' do |
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expect(account).to be_nil |
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end |
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end |
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context 'when WebFinger returns a different URI after a redirection' do |
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let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/bob' }] } } |
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before do |
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stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor)) |
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stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' }) |
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end |
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it 'fetches resource' do |
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account |
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expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once |
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end |
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it 'looks up webfinger' do |
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account |
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expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once |
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end |
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it 'looks up "redirected" webfinger' do |
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account |
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expect(a_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af')).to have_been_made.once |
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end |
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it 'does not create account' do |
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expect(account).to be_nil |
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end |
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end |
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context 'with wrong id' do |
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it 'does not create account' do |
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expect(subject.call('https://fake.address/@foo', prefetched_body: Oj.dump(actor))).to be_nil |
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end |
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end |
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end |
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end |
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