instiki/app/models/file_yard.rb

59 lines
1.7 KiB
Ruby

require 'fileutils'
require 'instiki_errors'
class FileYard
attr_reader :files_path
def initialize(files_path, max_upload_size)
@files_path, @max_upload_size = files_path, max_upload_size
FileUtils.mkdir_p(@files_path) unless File.exist?(@files_path)
@files = Dir["#{@files_path}/*"].collect{|path| File.basename(path) if File.file?(path) }.compact
end
def upload_file(name, io)
sanitize_file_name(name)
if io.kind_of?(Tempfile)
io.close
check_upload_size(io.size)
File.chmod(600, file_path(name)) if File.exists? file_path(name)
FileUtils.mv(io.path, file_path(name))
else
content = io.read
check_upload_size(content.length)
File.open(file_path(name), 'wb') { |f| f.write(content) }
end
# just in case, restrict read access and prohibit write access to the uploaded file
FileUtils.chmod(0440, file_path(name))
end
def files
Dir["#{files_path}/*"].collect{|path| File.basename(path) if File.file?(path)}.compact
end
def has_file?(name)
files.include?(name)
end
def file_path(name)
"#{files_path}/#{name}"
end
SANE_FILE_NAME = /[a-zA-Z0-9\-_\. ]{1,255}/
def sanitize_file_name(name)
unless name =~ SANE_FILE_NAME or name == '.' or name == '..'
raise Instiki::ValidationError.new("Invalid file name: '#{name}'.\n" +
"Only latin characters, digits, dots, underscores, dashes and spaces are accepted.")
end
end
def check_upload_size(actual_upload_size)
if actual_upload_size > @max_upload_size.kilobytes
raise Instiki::ValidationError.new("Uploaded file size (#{actual_upload_size / 1024} " +
"kbytes) exceeds the maximum (#{@max_upload_size} kbytes) set for this wiki")
end
end
end