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Contents
# frozen_string_literal: true
module Hyrax
##
# The default virus scanner ported from +Hyrax::Works+.
#
# If ClamAV is present, it will be used to check for the presence of a virus.
# If ClamAV is not installed or otherwise not available to your application,
# +Hyrax::Works+ does no virus checking add assumes files have no viruses.
#
# @example to use a virus checker other than Hyrax::VirusScanner:
# class MyScanner < Hyrax::Works::VirusScanner
# def infected?
# my_result = Scanner.check_for_viruses(file)
# [return true or false]
# end
# end
#
# # Then set Hyrax::Works to use your scanner either in a config file or initializer:
# Hyrax.config.virus_scanner = MyScanner
#
class VirusScanner
attr_reader :file
##
# @api public
# @param file [String]
def self.infected?(file)
new(file).infected?
end
def initialize(file)
@file = file
end
##
# @note Override this method to use your own virus checking software
#
# @return [Boolean]
def infected?
defined?(ClamAV) ? clam_av_scanner : null_scanner
end
def clam_av_scanner
scan_result = ClamAV.instance.method(:scanfile).call(file)
return false if scan_result.zero?
warning "A virus was found in #{file}: #{scan_result}"
true
end
##
# Always return zero if there's nothing available to check for viruses.
# This means that we assume all files have no viruses because we can't
# conclusively say if they have or not.
def null_scanner
warning "Unable to check #{file} for viruses because no virus scanner is defined" unless
Rails.env.test?
false
end
private
def warning(msg)
Hyrax.logger&.warn(msg)
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems