class WikiFile < ActiveRecord::Base belongs_to :web before_save :write_content_to_file before_destroy :delete_content_file validates_presence_of %w( web file_name ) validates_length_of :file_name, :within=>1..50 validates_length_of :description, :maximum=>255 def self.find_by_file_name(file_name) first(:conditions => ['file_name = ?', file_name]) end SANE_FILE_NAME = /^[a-zA-Z0-9\-_\. ]*$/ def validate if file_name if file_name !~ SANE_FILE_NAME errors.add("file_name", "is invalid. Only latin characters, digits, dots, underscores, " + "dashes and spaces are accepted") elsif file_name == '.' or file_name == '..' errors.add("file_name", "cannot be '.' or '..'") end end if @web and @content if (@content.size > @web.max_upload_size.kilobytes) errors.add("content", "size (#{(@content.size / 1024.0).round} kilobytes) exceeds " + "the maximum (#{web.max_upload_size} kilobytes) set for this wiki") end end errors.add("content", "is empty") if @content.nil? or @content.empty? end def content=(content) if content.respond_to? :read @content = content.read else @content = content end end def content @content ||= ( File.open(content_path, 'rb') { |f| f.read } ) end def content_path web.files_path.join(file_name) end def write_content_to_file web.create_files_directory unless File.exists?(web.files_path) File.open(self.content_path, 'wb') { |f| f.write(@content) } end def delete_content_file require 'fileutils' FileUtils.rm_f(content_path) if File.exists?(content_path) end end