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require "tempfile"
require "tmpdir"
require "fileutils"
class UploadedFile
InvalidPathError = Class.new(StandardError)
# The filename, *not* including the path, of the "uploaded" file
attr_reader :original_filename
# The tempfile
attr_reader :tempfile
# The content type of the "uploaded" file
attr_accessor :content_type
attr_reader :remote_id
attr_reader :sha256
def initialize(path, filename: nil, content_type: "application/octet-stream", sha256: nil, remote_id: nil)
raise InvalidPathError, "#{path} file does not exist" unless ::File.exist?(path)
@content_type = content_type
@original_filename = sanitize_filename(filename || path)
@content_type = content_type
@sha256 = sha256
@remote_id = remote_id
@tempfile = File.new(path, 'rb')
end
def self.from_params(params, field, upload_paths)
unless params["#{field}.path"]
raise InvalidPathError, "file is invalid" if params["#{field}.remote_id"]
return
end
file_path = File.realpath(params["#{field}.path"])
paths = Array(upload_paths) << Dir.tmpdir
unless self.allowed_path?(file_path, paths.compact)
raise InvalidPathError, "insecure path used '#{file_path}'"
end
UploadedFile.new(file_path,
filename: params["#{field}.name"],
content_type: params["#{field}.type"] || 'application/octet-stream',
sha256: params["#{field}.sha256"],
remote_id: params["#{field}.remote_id"])
end
def self.allowed_path?(file_path, paths)
paths.any? do |path|
File.exist?(path) && file_path.start_with?(File.realpath(path))
end
end
# copy-pasted from CarrierWave::SanitizedFile
def sanitize_filename(name)
name = name.tr("\\", "/") # work-around for IE
name = ::File.basename(name)
name = name.gsub(CarrierWave::SanitizedFile.sanitize_regexp, "_")
name = "_#{name}" if name =~ /\A\.+\z/
name = "unnamed" if name.empty?
name.mb_chars.to_s
end
def path
@tempfile.path
end
alias_method :local_path, :path
def method_missing(method_name, *args, &block) #:nodoc:
@tempfile.__send__(method_name, *args, &block) # rubocop:disable GitlabSecurity/PublicSend
end
def respond_to?(method_name, include_private = false) #:nodoc:
@tempfile.respond_to?(method_name, include_private) || super
end
end
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