214 lines
7.3 KiB
Ruby
214 lines
7.3 KiB
Ruby
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require 'test_helper'
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require 'net/imap'
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class EmailPostmasterToSender < ActiveSupport::TestCase
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setup do
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Setting.set('postmaster_max_size', 0.1)
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@test_id = rand(999_999_999)
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# setup the IMAP account info for Zammad
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if ENV['MAIL_SERVER'].blank?
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raise "Need MAIL_SERVER as ENV variable like export MAIL_SERVER='mx.example.com'"
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end
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if ENV['MAIL_SERVER_ACCOUNT'].blank?
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raise "Need MAIL_SERVER_ACCOUNT as ENV variable like export MAIL_SERVER_ACCOUNT='user:somepass'"
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end
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@server_address = ENV['MAIL_SERVER']
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@server_login = ENV['MAIL_SERVER_ACCOUNT'].split(':')[0]
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@server_password = ENV['MAIL_SERVER_ACCOUNT'].split(':')[1]
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@folder = "postmaster_to_sender_#{@test_id}"
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if ENV['MAIL_SERVER_EMAIL'].blank?
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raise "Need MAIL_SERVER_EMAIL as ENV variable like export MAIL_SERVER_EMAIL='master@example.com'"
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end
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@sender_email_address = ENV['MAIL_SERVER_EMAIL']
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@email_address = EmailAddress.create!(
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realname: 'me Helpdesk',
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email: "me#{@test_id}@example.com",
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updated_by_id: 1,
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created_by_id: 1,
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)
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group = Group.create_or_update(
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name: 'PostmasterToSenderTest',
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email_address_id: @email_address.id,
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updated_by_id: 1,
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created_by_id: 1,
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)
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@channel = Channel.create!(
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area: 'Email::Account',
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group_id: group.id,
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options: {
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inbound: {
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adapter: 'imap',
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options: {
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host: @server_address,
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user: @server_login,
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password: @server_password,
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ssl: true,
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folder: @folder,
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keep_on_server: false,
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}
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},
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outbound: {
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adapter: 'smtp',
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options: {
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host: @server_address,
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port: 25,
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start_tls: true,
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user: @server_login,
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password: @server_password,
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email: @email_address.email
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},
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},
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},
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active: true,
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updated_by_id: 1,
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created_by_id: 1,
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)
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@email_address.channel_id = @channel.id
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@email_address.save!
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end
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test 'postmaster reply with email on oversized incoming emails' do
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imap = Net::IMAP.new(@server_address, 993, true, nil, false)
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imap.login(@server_login, @server_password)
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imap.create(@folder)
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imap.select(@folder)
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# put a very large message in it
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large_message = "Subject: Oversized Email Message
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From: Max Mustermann <#{@sender_email_address}>
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To: shugo@example.com
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Message-ID: <#{@test_id}@zammad.test.com>
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Oversized Email Message Body #{'#' * 120_000}
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".gsub(/\n/, "\r\n")
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large_message_md5 = Digest::MD5.hexdigest(large_message)
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large_message_size = format('%.2f', large_message.size.to_f / 1024 / 1024)
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imap.append(@folder, large_message, [], Time.zone.now)
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@channel.fetch(true)
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# 1. verify that the oversized email has been saved locally to:
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# /tmp/oversized_mail/yyyy-mm-ddThh:mm:ss-:md5.eml
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path = Rails.root.join('tmp', 'oversized_mail')
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target_files = Dir.entries(path).select do |filename|
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filename =~ /^.+_#{large_message_md5}\.eml$/
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end
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assert(target_files.present?, 'Large message .eml log file must be present.')
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# pick the latest file that matches the criteria
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target_file = target_files.max
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# verify that the file is byte for byte identical to the sent message
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file_path = Rails.root.join('tmp', 'oversized_mail', target_file)
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eml_data = File.read(file_path)
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assert_equal(large_message, eml_data)
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# 2. verify that a postmaster response email has been sent to the sender
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imap.select('inbox')
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message_ids = imap.sort(['DATE'], ['ALL'], 'US-ASCII')
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assert(message_ids.count.positive?, 'Must have received a reply from the postmaster')
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imap_message_id = message_ids.last
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msg = imap.fetch(imap_message_id, 'RFC822')[0].attr['RFC822']
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assert(msg.present?, 'Must have received a reply from the postmaster')
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imap.store(imap_message_id, '+FLAGS', [:Deleted])
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imap.expunge()
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# parse the reply mail and verify the various headers
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parser = Channel::EmailParser.new
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mail = parser.parse(msg)
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assert_equal(mail[:from_email], @email_address.email)
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assert_equal(mail[:subject], '[ALERT] Message too large')
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assert_equal("<#{@test_id}@zammad.test.com>",
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mail['references'],
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'Reply\'s Referecnes header must match the send message ID')
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assert_equal("<#{@test_id}@zammad.test.com>",
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mail['in-reply-to'],
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'Reply\'s In-Reply-To header must match the send message ID')
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# verify the reply mail body content
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body = mail[:body]
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assert(body.start_with?('Dear Max Mustermann'), 'Body must contain sender name')
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assert(body.include?('Oversized Email Message'), 'Body must contain original subject')
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assert(body.include?('0.1 MB'), 'Body must contain max allowed message size')
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assert(body.include?("#{large_message_size} MB"), 'Body must contain the original message size')
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assert(body.include?(Setting.get('fqdn')), 'Body must contain the Zammad instance name')
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# 3. check if original mail got removed
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imap.select(@folder)
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message_ids = imap.sort(['DATE'], ['ALL'], 'US-ASCII')
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assert_equal(message_ids.count, 0, 'Original customer mail must be deleted.')
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# final clean up
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imap.delete(@folder)
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@channel.destroy!
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end
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test 'postmaster reply with no email on oversized incoming emails' do
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Setting.set('postmaster_send_reject_if_mail_too_large', false)
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imap = Net::IMAP.new(@server_address, 993, true, nil, false)
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imap.login(@server_login, @server_password)
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imap.select('inbox')
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message_count = imap.sort(['DATE'], ['ALL'], 'US-ASCII').count
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imap.create(@folder)
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imap.select(@folder)
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# put a very large message in it
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large_message = "Subject: Oversized Email Message
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From: Max Mustermann <#{@sender_email_address}>
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To: shugo@example.com
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Message-ID: <#{@test_id}@zammad.test.com>
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Oversized Email Message Body #{'#' * 120_000}
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".gsub(/\n/, "\r\n")
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imap.append(@folder, large_message, [], Time.zone.now)
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@channel.fetch(true)
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# 1. verify that the oversized email has been saved locally to:
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# /tmp/oversized_mail/yyyy-mm-ddThh:mm:ss-:md5.eml
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path = Rails.root.join('tmp', 'oversized_mail')
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target_files = Dir.entries(path).select do |filename|
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filename =~ /^.+?\.eml$/
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end
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assert_not(target_files.blank?, 'Large message .eml log file must be blank.')
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# 2. verify that a postmaster response email has been sent to the sender
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imap.select('inbox')
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message_ids = imap.sort(['DATE'], ['ALL'], 'US-ASCII')
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assert_equal(message_ids.count, message_count, 'Must not have received a reply from the postmaster')
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# 3. check if original mail got removed
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imap.select(@folder)
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message_ids = imap.sort(['DATE'], ['ALL'], 'US-ASCII')
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imap_message_id = message_ids.last
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msg = imap.fetch(imap_message_id, 'RFC822')[0].attr['RFC822']
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imap.store(imap_message_id, '+FLAGS', [:Deleted])
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imap.expunge()
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assert(msg.present?, 'Oversized Email Message')
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assert_equal(message_ids.count, 1, 'Original customer mail must be deleted.')
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# final clean up
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imap.delete(@folder)
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@channel.destroy!
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end
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teardown do
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Setting.set('postmaster_max_size', 10)
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end
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end
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