HTTP signatures (#4146)
* Add Request class with HTTP signature generator Spec: https://tools.ietf.org/html/draft-cavage-http-signatures-06 * Add HTTP signature verification concern * Add test for SignatureVerification concern * Add basic test for Request class * Make PuSH subscribe/unsubscribe requests use new Request class Accidentally fix lease_seconds not being set and sent properly, and change the new minimum subscription duration to 1 day * Make all PuSH workers use new Request class * Make Salmon sender use new Request class * Make FetchLinkService use new Request class * Make FetchAtomService use the new Request class * Make Remotable use the new Request class * Make ResolveRemoteAccountService use the new Request class * Add more tests * Allow +-30 seconds window for signed request to remain valid * Disable time window validation for signed requests, restore 7 days as PuSH subscription duration (which was previous default due to a bug)remotes/1727458204337373841/tmp_refs/heads/signup-info-prompt
parent
c1f201c49a
commit
1618b68bfa
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@ -2,6 +2,7 @@
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class AccountsController < ApplicationController
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include AccountControllerConcern
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include SignatureVerification
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def show
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respond_to do |format|
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@ -42,7 +42,7 @@ class Api::SubscriptionsController < Api::BaseController
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end
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def lease_seconds_or_default
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(params['hub.lease_seconds'] || 86_400).to_i.seconds
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(params['hub.lease_seconds'] || 1.day).to_i.seconds
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end
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def set_account
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@ -0,0 +1,87 @@
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# frozen_string_literal: true
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# Implemented according to HTTP signatures (Draft 6)
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# <https://tools.ietf.org/html/draft-cavage-http-signatures-06>
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module SignatureVerification
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extend ActiveSupport::Concern
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def signed_request?
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request.headers['Signature'].present?
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end
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def signed_request_account
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return @signed_request_account if defined?(@signed_request_account)
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unless signed_request?
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@signed_request_account = nil
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return
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end
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raw_signature = request.headers['Signature']
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signature_params = {}
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raw_signature.split(',').each do |part|
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parsed_parts = part.match(/([a-z]+)="([^"]+)"/i)
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next if parsed_parts.nil? || parsed_parts.size != 3
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signature_params[parsed_parts[1]] = parsed_parts[2]
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end
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if incompatible_signature?(signature_params)
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@signed_request_account = nil
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return
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end
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account = ResolveRemoteAccountService.new.call(signature_params['keyId'].gsub(/\Aacct:/, ''))
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if account.nil?
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@signed_request_account = nil
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return
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end
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signature = Base64.decode64(signature_params['signature'])
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compare_signed_string = build_signed_string(signature_params['headers'])
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if account.keypair.public_key.verify(OpenSSL::Digest::SHA256.new, signature, compare_signed_string)
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@signed_request_account = account
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@signed_request_account
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else
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@signed_request_account = nil
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end
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end
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private
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def build_signed_string(signed_headers)
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signed_headers = 'date' if signed_headers.blank?
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signed_headers.split(' ').map do |signed_header|
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if signed_header == Request::REQUEST_TARGET
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"#{Request::REQUEST_TARGET}: #{request.method.downcase} #{request.path}"
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else
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"#{signed_header}: #{request.headers[to_header_name(signed_header)]}"
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end
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end.join("\n")
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end
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def matches_time_window?
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begin
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time_sent = DateTime.httpdate(request.headers['Date'])
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rescue ArgumentError
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return false
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end
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(Time.now.utc - time_sent).abs <= 30
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end
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def to_header_name(name)
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name.split(/-/).map(&:capitalize).join('-')
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end
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def incompatible_signature?(signature_params)
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signature_params['keyId'].blank? ||
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signature_params['signature'].blank? ||
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signature_params['algorithm'].blank? ||
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signature_params['algorithm'] != 'rsa-sha256' ||
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!signature_params['keyId'].start_with?('acct:')
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end
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end
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@ -2,6 +2,7 @@
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class StreamEntriesController < ApplicationController
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include Authorization
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include SignatureVerification
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layout 'public'
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@ -1,17 +0,0 @@
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# frozen_string_literal: true
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module HttpHelper
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def http_client(options = {})
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timeout = { write: 10, connect: 10, read: 10 }.merge(options)
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HTTP.headers(user_agent: user_agent)
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.timeout(:per_operation, timeout)
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.follow
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end
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private
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def user_agent
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@user_agent ||= "#{HTTP::Request::USER_AGENT} (Mastodon/#{Mastodon::Version}; +http://#{Rails.configuration.x.local_domain}/)"
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end
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end
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@ -1,11 +1,9 @@
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# frozen_string_literal: true
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class ProviderDiscovery < OEmbed::ProviderDiscovery
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extend HttpHelper
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class << self
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def discover_provider(url, options = {})
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res = http_client.get(url)
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res = Request.new(:get, url).perform
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format = options[:format]
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raise OEmbed::NotFound, url if res.code != 200 || res.mime_type != 'text/html'
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@ -0,0 +1,70 @@
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# frozen_string_literal: true
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class Request
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REQUEST_TARGET = '(request-target)'
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include RoutingHelper
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def initialize(verb, url, options = {})
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@verb = verb
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@url = Addressable::URI.parse(url).normalize
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@options = options
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@headers = {}
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set_common_headers!
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end
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def on_behalf_of(account)
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raise ArgumentError unless account.local?
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@account = account
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end
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def add_headers(new_headers)
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@headers.merge!(new_headers)
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end
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def perform
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http_client.headers(headers).public_send(@verb, @url.to_s, @options)
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end
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def headers
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(@account ? @headers.merge('Signature' => signature) : @headers).without(REQUEST_TARGET)
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end
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private
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def set_common_headers!
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@headers[REQUEST_TARGET] = "#{@verb} #{@url.path}"
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@headers['User-Agent'] = user_agent
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@headers['Host'] = @url.host
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@headers['Date'] = Time.now.utc.httpdate
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end
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def signature
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key_id = @account.to_webfinger_s
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algorithm = 'rsa-sha256'
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signature = Base64.strict_encode64(@account.keypair.sign(OpenSSL::Digest::SHA256.new, signed_string))
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"keyId=\"#{key_id}\",algorithm=\"#{algorithm}\",headers=\"#{signed_headers}\",signature=\"#{signature}\""
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end
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def signed_string
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@headers.map { |key, value| "#{key.downcase}: #{value}" }.join("\n")
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end
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def signed_headers
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@headers.keys.join(' ').downcase
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end
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def user_agent
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@user_agent ||= "#{HTTP::Request::USER_AGENT} (Mastodon/#{Mastodon::Version}; +#{root_url})"
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end
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def timeout
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{ write: 10, connect: 10, read: 10 }
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end
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def http_client
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HTTP.timeout(:per_operation, timeout).follow
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end
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end
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@ -130,7 +130,7 @@ class Account < ApplicationRecord
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end
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def subscription(webhook_url)
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OStatus2::Subscription.new(remote_url, secret: secret, lease_seconds: 86_400 * 30, webhook: webhook_url, hub: hub_url)
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OStatus2::Subscription.new(remote_url, secret: secret, lease_seconds: 30.days.seconds, webhook: webhook_url, hub: hub_url)
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end
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def save_with_optional_media!
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@ -1,7 +1,6 @@
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# frozen_string_literal: true
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module Remotable
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include HttpHelper
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extend ActiveSupport::Concern
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included do
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return if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty? || self[attribute_name] == url
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begin
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response = http_client.get(url)
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response = Request.new(:get, url).perform
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return if response.code != 200
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@ -16,8 +16,8 @@
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#
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class Subscription < ApplicationRecord
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MIN_EXPIRATION = 7.days.seconds.to_i
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MAX_EXPIRATION = 30.days.seconds.to_i
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MIN_EXPIRATION = 1.day.to_i
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MAX_EXPIRATION = 30.days.to_i
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belongs_to :account, required: true
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@ -1,16 +1,14 @@
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# frozen_string_literal: true
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class FetchAtomService < BaseService
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include HttpHelper
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def call(url)
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return if url.blank?
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response = http_client.head(url)
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response = Request.new(:head, url).perform
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Rails.logger.debug "Remote status HEAD request returned code #{response.code}"
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response = http_client.get(url) if response.code == 405
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response = Request.new(:get, url).perform if response.code == 405
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Rails.logger.debug "Remote status GET request returned code #{response.code}"
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end
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def fetch(url)
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http_client.get(url).to_s
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Request.new(:get, url).perform.to_s
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end
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end
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@ -1,8 +1,6 @@
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# frozen_string_literal: true
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class FetchLinkCardService < BaseService
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include HttpHelper
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URL_PATTERN = %r{https?://\S+}
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def call(status)
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url = url.to_s
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card = PreviewCard.where(status: status).first_or_initialize(status: status, url: url)
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res = http_client.head(url)
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res = Request.new(:head, url).perform
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return if res.code != 200 || res.mime_type != 'text/html'
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end
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def attempt_opengraph(card, url)
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response = http_client.get(url)
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response = Request.new(:get, url).perform
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return if response.code != 200 || response.mime_type != 'text/html'
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@ -2,7 +2,6 @@
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class ResolveRemoteAccountService < BaseService
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include OStatus2::MagicKey
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include HttpHelper
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DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0'
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end
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def get_feed(url)
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response = http_client(write: 20, connect: 20, read: 50).get(Addressable::URI.parse(url).normalize)
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response = Request.new(:get, url).perform
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raise Goldfinger::Error, "Feed attempt failed for #{url}: HTTP #{response.code}" unless response.code == 200
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[response.to_s, Nokogiri::XML(response)]
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end
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@ -12,13 +12,23 @@ class SendInteractionService < BaseService
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return if block_notification?
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envelope = salmon.pack(@xml, @source_account.keypair)
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delivery = salmon.post(@target_account.salmon_url, envelope)
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delivery = build_request.perform
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raise "Delivery failed for #{target_account.salmon_url}: HTTP #{delivery.code}" unless delivery.code > 199 && delivery.code < 300
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end
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private
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def build_request
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request = Request.new(:post, @target_account.salmon_url, body: envelope)
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request.add_headers('Content-Type' => 'application/magic-envelope+xml')
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request
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end
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def envelope
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salmon.pack(@xml, @source_account.keypair)
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end
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def block_notification?
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DomainBlock.blocked?(@target_account.domain)
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end
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@ -2,34 +2,54 @@
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class SubscribeService < BaseService
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def call(account)
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account.secret = SecureRandom.hex
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@account = account
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@account.secret = SecureRandom.hex
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@response = build_request.perform
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subscription = account.subscription(api_subscription_url(account.id))
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response = subscription.subscribe
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if response_failed_permanently?(response)
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if response_failed_permanently?
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# We're not allowed to subscribe. Fail and move on.
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account.secret = ''
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account.save!
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elsif response_successful?(response)
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@account.secret = ''
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@account.save!
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elsif response_successful?
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# The subscription will be confirmed asynchronously.
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account.save!
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@account.save!
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else
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# The response was either a 429 rate limit, or a 5xx error.
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# We need to retry at a later time. Fail loudly!
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raise "Subscription attempt failed for #{account.acct} (#{account.hub_url}): HTTP #{response.code}"
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raise "Subscription attempt failed for #{@account.acct} (#{@account.hub_url}): HTTP #{@response.code}"
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end
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end
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private
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def build_request
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request = Request.new(:post, @account.hub_url, form: subscription_params)
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request.on_behalf_of(some_local_account) if some_local_account
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request
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end
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def subscription_params
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{
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'hub.topic': @account.remote_url,
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'hub.mode': 'subscribe',
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'hub.callback': api_subscription_url(@account.id),
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'hub.verify': 'async',
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'hub.secret': @account.secret,
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'hub.lease_seconds': 7.days.seconds,
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}
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end
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def some_local_account
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@some_local_account ||= Account.local.first
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end
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# Any response in the 3xx or 4xx range, except for 429 (rate limit)
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def response_failed_permanently?(response)
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(response.status.redirect? || response.status.client_error?) && !response.status.too_many_requests?
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def response_failed_permanently?
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(@response.status.redirect? || @response.status.client_error?) && !@response.status.too_many_requests?
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end
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# Any response in the 2xx range
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def response_successful?(response)
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response.status.success?
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def response_successful?
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@response.status.success?
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end
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end
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@ -2,17 +2,30 @@
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class UnsubscribeService < BaseService
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def call(account)
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subscription = account.subscription(api_subscription_url(account.id))
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response = subscription.unsubscribe
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@account = account
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@response = build_request.perform
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unless response.status.success?
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Rails.logger.debug "PuSH unsubscribe for #{account.acct} failed: #{response.status}"
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Rails.logger.debug "PuSH unsubscribe for #{@account.acct} failed: #{@response.status}" unless @response.status.success?
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@account.secret = ''
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@account.subscription_expires_at = nil
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@account.save!
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rescue HTTP::Error, OpenSSL::SSL::SSLError
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Rails.logger.debug "PuSH subscription request for #{@account.acct} could not be made due to HTTP or SSL error"
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end
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account.secret = ''
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account.subscription_expires_at = nil
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account.save!
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rescue HTTP::Error, OpenSSL::SSL::SSLError
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Rails.logger.debug "PuSH subscription request for #{account.acct} could not be made due to HTTP or SSL error"
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private
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def build_request
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Request.new(:post, @account.hub_url, form: subscription_params)
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end
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def subscription_params
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{
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'hub.topic': @account.remote_url,
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'hub.mode': 'unsubscribe',
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'hub.callback': api_subscription_url(@account.id),
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'hub.verify': 'async',
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}
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end
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end
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@ -60,9 +60,7 @@ class Pubsubhubbub::ConfirmationWorker
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end
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def callback_get_with_params
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HTTP.headers(user_agent: 'Mastodon/PubSubHubbub')
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.timeout(:per_operation, write: 20, connect: 20, read: 50)
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.get(subscription.callback_url, params: callback_params)
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Request.new(:get, subscription.callback_url, params: callback_params).perform
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end
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def callback_response_body
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@ -71,10 +69,10 @@ class Pubsubhubbub::ConfirmationWorker
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def callback_params
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{
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'hub.topic' => account_url(subscription.account, format: :atom),
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'hub.mode' => mode,
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'hub.challenge' => challenge,
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'hub.lease_seconds' => subscription.lease_seconds,
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'hub.topic': account_url(subscription.account, format: :atom),
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'hub.mode': mode,
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'hub.challenge': challenge,
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'hub.lease_seconds': subscription.lease_seconds,
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}
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end
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@ -33,9 +33,9 @@ class Pubsubhubbub::DeliveryWorker
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end
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def callback_post_payload
|
||||
HTTP.timeout(:per_operation, write: 50, connect: 20, read: 50)
|
||||
.headers(headers)
|
||||
.post(subscription.callback_url, body: payload)
|
||||
request = Request.new(:post, subscription.callback_url, body: payload)
|
||||
request.add_headers(headers)
|
||||
request.perform
|
||||
end
|
||||
|
||||
def blocked_domain?
|
||||
|
@ -48,13 +48,12 @@ class Pubsubhubbub::DeliveryWorker
|
|||
|
||||
def headers
|
||||
{
|
||||
'User-Agent' => 'Mastodon/PubSubHubbub',
|
||||
'Content-Type' => 'application/atom+xml',
|
||||
'Link' => link_headers,
|
||||
'Link' => link_header,
|
||||
}.merge(signature_headers.to_h)
|
||||
end
|
||||
|
||||
def link_headers
|
||||
def link_header
|
||||
LinkHeader.new([hub_link_header, self_link_header]).to_s
|
||||
end
|
||||
|
||||
|
|
|
@ -0,0 +1,74 @@
|
|||
# frozen_string_literal: true
|
||||
|
||||
require 'rails_helper'
|
||||
|
||||
describe ApplicationController, type: :controller do
|
||||
controller do
|
||||
include SignatureVerification
|
||||
|
||||
def success
|
||||
head 200
|
||||
end
|
||||
|
||||
def alternative_success
|
||||
head 200
|
||||
end
|
||||
end
|
||||
|
||||
before do
|
||||
routes.draw { get 'success' => 'anonymous#success' }
|
||||
end
|
||||
|
||||
context 'without signature header' do
|
||||
before do
|
||||
get :success
|
||||
end
|
||||
|
||||
describe '#signed_request?' do
|
||||
it 'returns false' do
|
||||
expect(controller.signed_request?).to be false
|
||||
end
|
||||
end
|
||||
|
||||
describe '#signed_request_account' do
|
||||
it 'returns nil' do
|
||||
expect(controller.signed_request_account).to be_nil
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
context 'with signature header' do
|
||||
let!(:author) { Fabricate(:account) }
|
||||
|
||||
before do
|
||||
get :success
|
||||
|
||||
fake_request = Request.new(:get, request.url)
|
||||
fake_request.on_behalf_of(author)
|
||||
|
||||
request.headers.merge!(fake_request.headers)
|
||||
end
|
||||
|
||||
describe '#signed_request?' do
|
||||
it 'returns true' do
|
||||
expect(controller.signed_request?).to be true
|
||||
end
|
||||
end
|
||||
|
||||
describe '#signed_request_account' do
|
||||
it 'returns an account' do
|
||||
expect(controller.signed_request_account).to eq author
|
||||
end
|
||||
|
||||
it 'returns nil when path does not match' do
|
||||
request.path = '/alternative-path'
|
||||
expect(controller.signed_request_account).to be_nil
|
||||
end
|
||||
|
||||
it 'returns nil when method does not match' do
|
||||
post :success
|
||||
expect(controller.signed_request_account).to be_nil
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
|
@ -1,13 +0,0 @@
|
|||
# frozen_string_literal: true
|
||||
|
||||
require 'rails_helper'
|
||||
|
||||
describe HttpHelper do
|
||||
describe 'http_client' do
|
||||
it 'returns HTTP::Client with default options' do
|
||||
options = helper.http_client.default_options
|
||||
expect(options.headers['User-Agent']).to match /.+ \(Mastodon\/.+;\ \+http:\/\/cb6e6126\.ngrok\.io\/\)/
|
||||
expect(options.timeout_options).to eq read_timeout: 10, write_timeout: 10, connect_timeout: 10
|
||||
end
|
||||
end
|
||||
end
|
|
@ -0,0 +1,54 @@
|
|||
# frozen_string_literal: true
|
||||
|
||||
require 'rails_helper'
|
||||
|
||||
describe Request do
|
||||
subject { Request.new(:get, 'http://example.com') }
|
||||
|
||||
describe '#headers' do
|
||||
it 'returns user agent' do
|
||||
expect(subject.headers['User-Agent']).to be_present
|
||||
end
|
||||
|
||||
it 'returns the date header' do
|
||||
expect(subject.headers['Date']).to be_present
|
||||
end
|
||||
|
||||
it 'returns the host header' do
|
||||
expect(subject.headers['Host']).to be_present
|
||||
end
|
||||
|
||||
it 'does not return virtual request-target header' do
|
||||
expect(subject.headers['(request-target)']).to be_nil
|
||||
end
|
||||
end
|
||||
|
||||
describe '#on_behalf_of' do
|
||||
it 'when used, adds signature header' do
|
||||
subject.on_behalf_of(Fabricate(:account))
|
||||
expect(subject.headers['Signature']).to be_present
|
||||
end
|
||||
end
|
||||
|
||||
describe '#add_headers' do
|
||||
it 'adds headers to the request' do
|
||||
subject.add_headers('Test' => 'Foo')
|
||||
expect(subject.headers['Test']).to eq 'Foo'
|
||||
end
|
||||
end
|
||||
|
||||
describe '#perform' do
|
||||
before do
|
||||
stub_request(:get, 'http://example.com')
|
||||
subject.perform
|
||||
end
|
||||
|
||||
it 'executes a HTTP request' do
|
||||
expect(a_request(:get, 'http://example.com')).to have_been_made.once
|
||||
end
|
||||
|
||||
it 'sets headers' do
|
||||
expect(a_request(:get, 'http://example.com').with(headers: subject.headers)).to have_been_made
|
||||
end
|
||||
end
|
||||
end
|
|
@ -83,6 +83,6 @@ describe Pubsubhubbub::ConfirmationWorker do
|
|||
end
|
||||
|
||||
def http_headers
|
||||
{ 'Connection' => 'close', 'Host' => 'example.com', 'User-Agent' => 'Mastodon/PubSubHubbub' }
|
||||
{ 'Connection' => 'close', 'Host' => 'example.com', 'User-Agent' => 'http.rb/2.2.2 (Mastodon/1.4.7; +https://cb6e6126.ngrok.io/)' }
|
||||
end
|
||||
end
|
||||
|
|
|
@ -59,7 +59,7 @@ describe Pubsubhubbub::DeliveryWorker do
|
|||
'Content-Type' => 'application/atom+xml',
|
||||
'Host' => 'example.com',
|
||||
'Link' => "<https://#{Rails.configuration.x.local_domain}/api/push>; rel=\"hub\", <https://#{Rails.configuration.x.local_domain}/users/#{subscription.account.username}.atom>; rel=\"self\"",
|
||||
'User-Agent' => 'Mastodon/PubSubHubbub',
|
||||
'User-Agent' => 'http.rb/2.2.2 (Mastodon/1.4.7; +https://cb6e6126.ngrok.io/)',
|
||||
}.tap do |basic|
|
||||
known_digest = OpenSSL::HMAC.hexdigest(OpenSSL::Digest.new('sha1'), subscription.secret.to_s, payload)
|
||||
basic.merge('X-Hub-Signature' => "sha1=#{known_digest}") if subscription.secret?
|
||||
|
|
Loading…
Reference in New Issue