discourse/lib/email/cleaner.rb

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# frozen_string_literal: true
module Email
class Cleaner
def initialize(mail, remove_attachments: true, truncate: true, rejected: false)
@mail = Mail.new(mail)
@mail.charset = "UTF-8"
@remove_attachments = remove_attachments
@truncate = truncate
@rejected = rejected
end
def execute
@mail.without_attachments! if @remove_attachments
truncate! if @truncate
remove_null_byte(@mail.to_s)
end
def self.delete_rejected!
IncomingEmail.delete_by(
"rejection_message IS NOT NULL AND created_at < ?",
SiteSetting.delete_rejected_email_after_days.days.ago,
)
end
private
def truncate!
parts.each { |part| part.body = part.body.decoded.truncate(truncate_limit, omission: "") }
end
def parts
@mail.multipart? ? @mail.parts : [@mail]
end
def truncate_limit
@rejected ? SiteSetting.raw_rejected_email_max_length : SiteSetting.raw_email_max_length
end
def remove_null_byte(message)
message.gsub!("\x00", "")
message
end
end
end