fix: allow verification when page size exceeds 1MB (using HTML5 parser) (#22879)
* fix: allow verification when page size exceeds 1MB Truncates the page after 1MB instead Closes #15316 * switch to HTML5 parser, fix rubocop errors * undo rubocop fixes Co-authored-by: Chris Zubak-Skees <chriszs@gmail.com>
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@ -154,9 +154,7 @@ class Request
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end
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module ClientLimit
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def body_with_limit(limit = 1.megabyte)
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raise Mastodon::LengthValidationError if content_length.present? && content_length > limit
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def truncated_body(limit = 1.megabyte)
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if charset.nil?
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encoding = Encoding::BINARY
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else
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@ -173,11 +171,19 @@ class Request
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contents << chunk
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chunk.clear
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raise Mastodon::LengthValidationError if contents.bytesize > limit
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break if contents.bytesize > limit
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end
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contents
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end
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def body_with_limit(limit = 1.megabyte)
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raise Mastodon::LengthValidationError if content_length.present? && content_length > limit
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contents = truncated_body(limit)
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raise Mastodon::LengthValidationError if contents.bytesize > limit
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contents
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end
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end
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if ::HTTP::Response.methods.include?(:body_with_limit) && !Rails.env.production?
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@ -26,7 +26,7 @@ class VerifyLinkService < BaseService
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def link_back_present?
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return false if @body.blank?
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links = Nokogiri::HTML(@body).xpath('//a[contains(concat(" ", normalize-space(@rel), " "), " me ")]|//link[contains(concat(" ", normalize-space(@rel), " "), " me ")]')
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links = Nokogiri::HTML5(@body).xpath('//a[contains(concat(" ", normalize-space(@rel), " "), " me ")]|//link[contains(concat(" ", normalize-space(@rel), " "), " me ")]')
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if links.any? { |link| link['href']&.downcase == @link_back.downcase }
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true
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@ -120,6 +120,11 @@ describe Request do
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expect { subject.perform { |response| response.body_with_limit } }.to raise_error Mastodon::LengthValidationError
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end
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it 'truncates large monolithic body' do
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stub_request(:any, 'http://example.com').to_return(body: SecureRandom.random_bytes(2.megabytes), headers: { 'Content-Length' => 2.megabytes })
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expect(subject.perform { |response| response.truncated_body.bytesize }).to be < 2.megabytes
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end
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it 'uses binary encoding if Content-Type does not tell encoding' do
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stub_request(:any, 'http://example.com').to_return(body: '', headers: { 'Content-Type' => 'text/html' })
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expect(subject.perform { |response| response.body_with_limit.encoding }).to eq Encoding::BINARY
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@ -73,6 +73,33 @@ RSpec.describe VerifyLinkService, type: :service do
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end
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end
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context 'when a document is truncated but the link back is valid' do
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let(:html) do
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"
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<!doctype html>
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<body>
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<a rel=\"me\" href=\"#{ActivityPub::TagManager.instance.url_for(account)}\"
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"
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end
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it 'marks the field as not verified' do
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expect(field.verified?).to be false
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end
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end
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context 'when a link back might be truncated' do
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let(:html) do
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"
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<!doctype html>
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<body>
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<a rel=\"me\" href=\"#{ActivityPub::TagManager.instance.url_for(account)}"
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end
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it 'does not mark the field as verified' do
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expect(field.verified?).to be false
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end
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end
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context 'when a link does not contain a link back' do
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let(:html) { '' }
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