# frozen_string_literal: true require 'fast_spec_helper' require 'mail' require_relative '../../config/initializers/mail_encoding_patch' RSpec.describe 'Mail quoted-printable transfer encoding patch and Unicode characters' do shared_examples 'email encoding' do |email| it 'enclosing in a new object does not change the encoded original' do new_email = Mail.new(email) expect(new_email.subject).to eq(email.subject) expect(new_email.from).to eq(email.from) expect(new_email.to).to eq(email.to) expect(new_email.content_type).to eq(email.content_type) expect(new_email.content_transfer_encoding).to eq(email.content_transfer_encoding) expect(new_email.encoded).to eq(email.encoded) end end context 'with a text email' do context 'with a body that encodes to exactly 74 characters (final newline)' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/plain; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "-123456789-123456789-123456789-123456789-123456789-123456789-123456789-1\n" end it_behaves_like 'email encoding', email end context 'with a body that encodes to exactly 74 characters (no final newline)' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/plain; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12" end it_behaves_like 'email encoding', email end context 'with a body that encodes to exactly 75 characters' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/plain; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12\n" end it_behaves_like 'email encoding', email end end context 'with an html email' do context 'with a body that encodes to exactly 74 characters (final newline)' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/html; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "

-123456789-123456789-123456789-123456789-123456789-123456789-1234

\n" end it_behaves_like 'email encoding', email end context 'with a body that encodes to exactly 74 characters (no final newline)' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/html; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "

-123456789-123456789-123456789-123456789-123456789-123456789-12345

" end it_behaves_like 'email encoding', email end context 'with a body that encodes to exactly 75 characters' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/html; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "

-123456789-123456789-123456789-123456789-123456789-123456789-12345

\n" end it_behaves_like 'email encoding', email end end context 'a multipart email' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' end text_part = Mail::Part.new do content_type 'text/plain; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "\r\n\r\n@john.doe, now known as John Dóe has accepted your invitation to join the Administrator / htmltest project.\r\n\r\nhttp://169.254.169.254:3000/root/htmltest\r\n\r\n-- \r\nYou're receiving this email because of your account on 169.254.169.254.\r\n\r\n\r\n\r\n" end html_part = Mail::Part.new do content_type 'text/html; charset=UTF-8' content_transfer_encoding 'quoted-printable' body "\r\n\r\n@john.doe, now known as John Dóe has accepted your invitation to join the Administrator / htmltest project.\r\n\r\nhttp://169.254.169.254:3000/root/htmltest\r\n\r\n-- \r\nYou're receiving this email because of your account on 169.254.169.254.\r\n\r\n\r\n\r\n" end email.text_part = text_part email.html_part = html_part it_behaves_like 'email encoding', email end context 'with non UTF-8 charset' do email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' content_type 'text/plain; charset=windows-1251' content_transfer_encoding 'quoted-printable' body "This line is very long and will be put in multiple quoted-printable lines. Some Russian character: Д\n\n\n".encode('windows-1251') end it_behaves_like 'email encoding', email it 'can be decoded back' do expect(Mail.new(email).body.decoded.dup.force_encoding('windows-1251').encode('utf-8')).to include('Some Russian character: Д') end end context 'with binary content' do context 'can be encoded with \'base64\' content-transfer-encoding' do image = File.binread('spec/fixtures/rails_sample.jpg') email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' end part = Mail::Part.new part.body = [image].pack('m') part.content_type = 'image/jpg' part.content_transfer_encoding = 'base64' email.parts << part it_behaves_like 'email encoding', email it 'binary contents are not modified' do expect(email.parts.first.decoded).to eq(image) # Enclosing in a new Mail object does not corrupt encoded data expect(Mail.new(email).parts.first.decoded).to eq(image) end end context 'encoding fails with \'quoted-printable\' content-transfer-encoding' do image = File.binread('spec/fixtures/rails_sample.jpg') email = Mail.new do to 'jane.doe@example.com' from 'John Dóe ' subject 'Encoding tést' end part = Mail::Part.new part.body = [image].pack('M*') part.content_type = 'image/jpg' part.content_transfer_encoding = 'quoted-printable' email.parts << part # The Mail patch in `config/initializers/mail_encoding_patch.rb` fixes # encoding of non-binary content. The failure below is expected since we # reverted some upstream changes in order to properly support SMIME signatures # See https://gitlab.com/gitlab-org/gitlab/issues/197386 it 'content cannot be decoded back' do # Headers are ok expect(email.subject).to eq(email.subject) expect(email.from).to eq(email.from) expect(email.to).to eq(email.to) expect(email.content_type).to eq(email.content_type) expect(email.content_transfer_encoding).to eq(email.content_transfer_encoding) # Content cannot be recovered expect(email.parts.first.decoded).not_to eq(image) end end end end