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