697 lines
21 KiB
Ruby
Executable File
697 lines
21 KiB
Ruby
Executable File
module Zip
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class Entry
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STORED = 0
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DEFLATED = 8
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# Language encoding flag (EFS) bit
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EFS = 0b100000000000
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attr_accessor :comment, :compressed_size, :crc, :extra, :compression_method,
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:name, :size, :local_header_offset, :zipfile, :fstype, :external_file_attributes,
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:gp_flags, :header_signature, :follow_symlinks,
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:restore_times, :restore_permissions, :restore_ownership,
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:unix_uid, :unix_gid, :unix_perms,
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:dirty
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attr_reader :ftype, :filepath # :nodoc:
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def set_default_vars_values
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@local_header_offset = 0
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@local_header_size = nil # not known until local entry is created or read
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@internal_file_attributes = 1
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@external_file_attributes = 0
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@header_signature = ::Zip::CENTRAL_DIRECTORY_ENTRY_SIGNATURE
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@version_needed_to_extract = VERSION_NEEDED_TO_EXTRACT
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@version = VERSION_MADE_BY
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@ftype = nil # unspecified or unknown
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@filepath = nil
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@gp_flags = 0
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if ::Zip.unicode_names
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@gp_flags |= EFS
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@version = 63
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end
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@follow_symlinks = false
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@restore_times = true
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@restore_permissions = false
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@restore_ownership = false
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# BUG: need an extra field to support uid/gid's
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@unix_uid = nil
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@unix_gid = nil
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@unix_perms = nil
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#@posix_acl = nil
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#@ntfs_acl = nil
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@dirty = false
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end
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def check_name(name)
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if name.start_with?('/')
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raise ::Zip::EntryNameError, "Illegal ZipEntry name '#{name}', name must not start with /"
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end
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end
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def initialize(*args)
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name = args[1] || ''
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check_name(name)
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set_default_vars_values
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@fstype = ::Zip::RUNNING_ON_WINDOWS ? ::Zip::FSTYPE_FAT : ::Zip::FSTYPE_UNIX
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@zipfile = args[0] || ''
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@name = name
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@comment = args[2] || ''
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@extra = args[3] || ''
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@compressed_size = args[4] || 0
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@crc = args[5] || 0
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@compression_method = args[6] || ::Zip::Entry::DEFLATED
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@size = args[7] || 0
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@time = args[8] || ::Zip::DOSTime.now
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@ftype = name_is_directory? ? :directory : :file
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@extra = ::Zip::ExtraField.new(@extra.to_s) unless ::Zip::ExtraField === @extra
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end
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def time
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if @extra['UniversalTime']
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@extra['UniversalTime'].mtime
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elsif @extra['NTFS']
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@extra['NTFS'].mtime
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else
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# Standard time field in central directory has local time
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# under archive creator. Then, we can't get timezone.
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@time
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end
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end
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alias :mtime :time
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def time=(value)
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unless @extra.member?('UniversalTime') || @extra.member?('NTFS')
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@extra.create('UniversalTime')
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end
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(@extra['UniversalTime'] || @extra['NTFS']).mtime = value
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@time = value
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end
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def file_type_is?(type)
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raise InternalError, "current filetype is unknown: #{self.inspect}" unless @ftype
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@ftype == type
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end
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# Dynamic checkers
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%w(directory file symlink).each do |k|
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define_method "#{k}?" do
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file_type_is?(k.to_sym)
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end
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end
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def name_is_directory? #:nodoc:all
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@name.end_with?('/')
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end
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def local_entry_offset #:nodoc:all
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local_header_offset + @local_header_size
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end
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def name_size
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@name ? @name.bytesize : 0
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end
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def extra_size
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@extra ? @extra.local_size : 0
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end
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def comment_size
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@comment ? @comment.bytesize : 0
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end
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def calculate_local_header_size #:nodoc:all
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LOCAL_ENTRY_STATIC_HEADER_LENGTH + name_size + extra_size
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end
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# check before rewriting an entry (after file sizes are known)
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# that we didn't change the header size (and thus clobber file data or something)
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def verify_local_header_size!
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return if @local_header_size.nil?
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new_size = calculate_local_header_size
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raise Error, "local header size changed (#{@local_header_size} -> #{new_size})" if @local_header_size != new_size
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end
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def cdir_header_size #:nodoc:all
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CDIR_ENTRY_STATIC_HEADER_LENGTH + name_size +
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(@extra ? @extra.c_dir_size : 0) + comment_size
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end
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def next_header_offset #:nodoc:all
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local_entry_offset + self.compressed_size + data_descriptor_size
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end
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# Extracts entry to file dest_path (defaults to @name).
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def extract(dest_path = @name, &block)
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block ||= proc { ::Zip.on_exists_proc }
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if directory? || file? || symlink?
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self.__send__("create_#{@ftype}", dest_path, &block)
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else
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raise RuntimeError, "unknown file type #{self.inspect}"
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end
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self
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end
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def to_s
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@name
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end
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protected
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class << self
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def read_zip_short(io) # :nodoc:
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io.read(2).unpack('v')[0]
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end
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def read_zip_long(io) # :nodoc:
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io.read(4).unpack('V')[0]
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end
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def read_zip_64_long(io) # :nodoc:
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io.read(8).unpack('Q<')[0]
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end
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def read_c_dir_entry(io) #:nodoc:all
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path = if io.is_a?(::IO)
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io.path
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else
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io
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end
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entry = new(path)
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entry.read_c_dir_entry(io)
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entry
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rescue Error
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nil
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end
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def read_local_entry(io)
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entry = self.new(io)
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entry.read_local_entry(io)
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entry
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rescue Error
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nil
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end
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end
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public
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def unpack_local_entry(buf)
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@header_signature,
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@version,
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@fstype,
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@gp_flags,
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@compression_method,
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@last_mod_time,
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@last_mod_date,
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@crc,
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@compressed_size,
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@size,
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@name_length,
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@extra_length = buf.unpack('VCCvvvvVVVvv')
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end
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def read_local_entry(io) #:nodoc:all
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@local_header_offset = io.tell
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static_sized_fields_buf = io.read(::Zip::LOCAL_ENTRY_STATIC_HEADER_LENGTH)
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unless static_sized_fields_buf.bytesize == ::Zip::LOCAL_ENTRY_STATIC_HEADER_LENGTH
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raise Error, "Premature end of file. Not enough data for zip entry local header"
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end
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unpack_local_entry(static_sized_fields_buf)
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unless @header_signature == ::Zip::LOCAL_ENTRY_SIGNATURE
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raise ::Zip::Error, "Zip local header magic not found at location '#{local_header_offset}'"
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end
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set_time(@last_mod_date, @last_mod_time)
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@name = io.read(@name_length)
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extra = io.read(@extra_length)
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@name.gsub!('\\', '/')
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if extra && extra.bytesize != @extra_length
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raise ::Zip::Error, "Truncated local zip entry header"
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else
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if ::Zip::ExtraField === @extra
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@extra.merge(extra)
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else
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@extra = ::Zip::ExtraField.new(extra)
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end
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end
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parse_zip64_extra(true)
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@local_header_size = calculate_local_header_size
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end
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def pack_local_entry
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zip64 = @extra['Zip64']
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[::Zip::LOCAL_ENTRY_SIGNATURE,
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@version_needed_to_extract, # version needed to extract
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@gp_flags, # @gp_flags ,
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@compression_method,
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@time.to_binary_dos_time, # @last_mod_time ,
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@time.to_binary_dos_date, # @last_mod_date ,
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@crc,
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(zip64 && zip64.compressed_size) ? 0xFFFFFFFF : @compressed_size,
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(zip64 && zip64.original_size) ? 0xFFFFFFFF : @size,
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name_size,
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@extra ? @extra.local_size : 0].pack('VvvvvvVVVvv')
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end
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def write_local_entry(io, rewrite = false) #:nodoc:all
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prep_zip64_extra(true)
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verify_local_header_size! if rewrite
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@local_header_offset = io.tell
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io << pack_local_entry
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io << @name
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io << @extra.to_local_bin if @extra
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@local_header_size = io.tell - @local_header_offset
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end
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def unpack_c_dir_entry(buf)
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@header_signature,
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@version, # version of encoding software
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@fstype, # filesystem type
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@version_needed_to_extract,
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@gp_flags,
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@compression_method,
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@last_mod_time,
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@last_mod_date,
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@crc,
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@compressed_size,
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@size,
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@name_length,
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@extra_length,
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@comment_length,
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_, # diskNumberStart
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@internal_file_attributes,
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@external_file_attributes,
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@local_header_offset,
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@name,
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@extra,
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@comment = buf.unpack('VCCvvvvvVVVvvvvvVV')
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end
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def set_ftype_from_c_dir_entry
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@ftype = case @fstype
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when ::Zip::FSTYPE_UNIX
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@unix_perms = (@external_file_attributes >> 16) & 07777
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case (@external_file_attributes >> 28)
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when ::Zip::FILE_TYPE_DIR
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:directory
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when ::Zip::FILE_TYPE_FILE
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:file
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when ::Zip::FILE_TYPE_SYMLINK
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:symlink
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else
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#best case guess for whether it is a file or not
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#Otherwise this would be set to unknown and that entry would never be able to extracted
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if name_is_directory?
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:directory
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else
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:file
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end
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end
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else
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if name_is_directory?
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:directory
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else
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:file
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end
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end
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end
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def check_c_dir_entry_static_header_length(buf)
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unless buf.bytesize == ::Zip::CDIR_ENTRY_STATIC_HEADER_LENGTH
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raise Error, 'Premature end of file. Not enough data for zip cdir entry header'
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end
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end
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def check_c_dir_entry_signature
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unless header_signature == ::Zip::CENTRAL_DIRECTORY_ENTRY_SIGNATURE
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raise Error, "Zip local header magic not found at location '#{local_header_offset}'"
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end
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end
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def check_c_dir_entry_comment_size
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unless @comment && @comment.bytesize == @comment_length
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raise ::Zip::Error, "Truncated cdir zip entry header"
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end
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end
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def read_c_dir_extra_field(io)
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if @extra.is_a?(::Zip::ExtraField)
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@extra.merge(io.read(@extra_length))
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else
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@extra = ::Zip::ExtraField.new(io.read(@extra_length))
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end
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end
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def read_c_dir_entry(io) #:nodoc:all
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static_sized_fields_buf = io.read(::Zip::CDIR_ENTRY_STATIC_HEADER_LENGTH)
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check_c_dir_entry_static_header_length(static_sized_fields_buf)
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unpack_c_dir_entry(static_sized_fields_buf)
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check_c_dir_entry_signature
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set_time(@last_mod_date, @last_mod_time)
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@name = io.read(@name_length).tr('\\', '/')
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read_c_dir_extra_field(io)
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@comment = io.read(@comment_length)
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check_c_dir_entry_comment_size
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set_ftype_from_c_dir_entry
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parse_zip64_extra(false)
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end
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def file_stat(path) # :nodoc:
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if @follow_symlinks
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::File::stat(path)
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else
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::File::lstat(path)
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end
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end
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def get_extra_attributes_from_path(path) # :nodoc:
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unless Zip::RUNNING_ON_WINDOWS
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stat = file_stat(path)
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@unix_uid = stat.uid
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@unix_gid = stat.gid
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@unix_perms = stat.mode & 07777
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end
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end
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def set_unix_permissions_on_path(dest_path)
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# BUG: does not update timestamps into account
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# ignore setuid/setgid bits by default. honor if @restore_ownership
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unix_perms_mask = 01777
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unix_perms_mask = 07777 if @restore_ownership
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::FileUtils.chmod(@unix_perms & unix_perms_mask, dest_path) if @restore_permissions && @unix_perms
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::FileUtils.chown(@unix_uid, @unix_gid, dest_path) if @restore_ownership && @unix_uid && @unix_gid && ::Process.egid == 0
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# File::utimes()
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end
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def set_extra_attributes_on_path(dest_path) # :nodoc:
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return unless (file? || directory?)
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case @fstype
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when ::Zip::FSTYPE_UNIX
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set_unix_permissions_on_path(dest_path)
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end
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end
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def pack_c_dir_entry
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zip64 = @extra['Zip64']
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[
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@header_signature,
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@version, # version of encoding software
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@fstype, # filesystem type
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@version_needed_to_extract, # @versionNeededToExtract ,
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@gp_flags, # @gp_flags ,
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@compression_method,
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@time.to_binary_dos_time, # @last_mod_time ,
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@time.to_binary_dos_date, # @last_mod_date ,
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@crc,
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(zip64 && zip64.compressed_size) ? 0xFFFFFFFF : @compressed_size,
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(zip64 && zip64.original_size) ? 0xFFFFFFFF : @size,
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name_size,
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@extra ? @extra.c_dir_size : 0,
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comment_size,
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(zip64 && zip64.disk_start_number) ? 0xFFFF : 0, # disk number start
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@internal_file_attributes, # file type (binary=0, text=1)
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@external_file_attributes, # native filesystem attributes
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(zip64 && zip64.relative_header_offset) ? 0xFFFFFFFF : @local_header_offset,
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@name,
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@extra,
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@comment
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].pack('VCCvvvvvVVVvvvvvVV')
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end
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def write_c_dir_entry(io) #:nodoc:all
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prep_zip64_extra(false)
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case @fstype
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when ::Zip::FSTYPE_UNIX
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ft = case @ftype
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when :file
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@unix_perms ||= 0644
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::Zip::FILE_TYPE_FILE
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when :directory
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@unix_perms ||= 0755
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::Zip::FILE_TYPE_DIR
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when :symlink
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@unix_perms ||= 0755
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::Zip::FILE_TYPE_SYMLINK
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end
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unless ft.nil?
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@external_file_attributes = (ft << 12 | (@unix_perms & 07777)) << 16
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end
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end
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io << pack_c_dir_entry
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io << @name
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io << (@extra ? @extra.to_c_dir_bin : '')
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io << @comment
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end
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def ==(other)
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return false unless other.class == self.class
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# Compares contents of local entry and exposed fields
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keys_equal = %w(compression_method crc compressed_size size name extra filepath).all? do |k|
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other.__send__(k.to_sym) == self.__send__(k.to_sym)
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end
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keys_equal && self.time.dos_equals(other.time)
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end
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def <=> (other)
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self.to_s <=> other.to_s
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end
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# Returns an IO like object for the given ZipEntry.
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# Warning: may behave weird with symlinks.
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def get_input_stream(&block)
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if @ftype == :directory
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yield ::Zip::NullInputStream if block_given?
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::Zip::NullInputStream
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elsif @filepath
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case @ftype
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when :file
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::File.open(@filepath, 'rb', &block)
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when :symlink
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linkpath = ::File.readlink(@filepath)
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stringio = ::StringIO.new(linkpath)
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yield(stringio) if block_given?
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stringio
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else
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raise "unknown @file_type #{@ftype}"
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end
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else
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zis = ::Zip::InputStream.new(@zipfile, local_header_offset)
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zis.get_next_entry
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if block_given?
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begin
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yield(zis)
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ensure
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zis.close
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end
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else
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zis
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end
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end
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end
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def gather_fileinfo_from_srcpath(src_path) # :nodoc:
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stat = file_stat(src_path)
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@ftype = case stat.ftype
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when 'file'
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if name_is_directory?
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raise ArgumentError,
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"entry name '#{newEntry}' indicates directory entry, but "+
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"'#{src_path}' is not a directory"
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end
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:file
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when 'directory'
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@name += '/' unless name_is_directory?
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:directory
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when 'link'
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if name_is_directory?
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raise ArgumentError,
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"entry name '#{newEntry}' indicates directory entry, but "+
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"'#{src_path}' is not a directory"
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end
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:symlink
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else
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raise RuntimeError, "unknown file type: #{src_path.inspect} #{stat.inspect}"
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end
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|
|
@filepath = src_path
|
|
get_extra_attributes_from_path(@filepath)
|
|
end
|
|
|
|
def write_to_zip_output_stream(zip_output_stream) #:nodoc:all
|
|
if @ftype == :directory
|
|
zip_output_stream.put_next_entry(self, nil, nil, ::Zip::Entry::STORED)
|
|
elsif @filepath
|
|
zip_output_stream.put_next_entry(self, nil, nil, self.compression_method || ::Zip::Entry::DEFLATED)
|
|
get_input_stream { |is| ::Zip::IOExtras.copy_stream(zip_output_stream, is) }
|
|
else
|
|
zip_output_stream.copy_raw_entry(self)
|
|
end
|
|
end
|
|
|
|
def parent_as_string
|
|
entry_name = name.chomp('/')
|
|
slash_index = entry_name.rindex('/')
|
|
slash_index ? entry_name.slice(0, slash_index+1) : nil
|
|
end
|
|
|
|
def get_raw_input_stream(&block)
|
|
if @zipfile.is_a?(::IO) || @zipfile.is_a?(::StringIO)
|
|
yield @zipfile
|
|
else
|
|
::File.open(@zipfile, "rb", &block)
|
|
end
|
|
end
|
|
|
|
def clean_up
|
|
# By default, do nothing
|
|
end
|
|
|
|
private
|
|
|
|
def set_time(binary_dos_date, binary_dos_time)
|
|
@time = ::Zip::DOSTime.parse_binary_dos_format(binary_dos_date, binary_dos_time)
|
|
rescue ArgumentError
|
|
puts "Invalid date/time in zip entry" if ::Zip.warn_invalid_date
|
|
end
|
|
|
|
def create_file(dest_path, continue_on_exists_proc = proc { Zip.continue_on_exists_proc })
|
|
if ::File.exist?(dest_path) && !yield(self, dest_path)
|
|
raise ::Zip::DestinationFileExistsError,
|
|
"Destination '#{dest_path}' already exists"
|
|
end
|
|
::File.open(dest_path, "wb") do |os|
|
|
get_input_stream do |is|
|
|
set_extra_attributes_on_path(dest_path)
|
|
|
|
buf = ''
|
|
while buf = is.sysread(::Zip::Decompressor::CHUNK_SIZE, buf)
|
|
os << buf
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def create_directory(dest_path)
|
|
return if ::File.directory?(dest_path)
|
|
if ::File.exist?(dest_path)
|
|
if block_given? && yield(self, dest_path)
|
|
::FileUtils::rm_f dest_path
|
|
else
|
|
raise ::Zip::DestinationFileExistsError,
|
|
"Cannot create directory '#{dest_path}'. "+
|
|
"A file already exists with that name"
|
|
end
|
|
end
|
|
::FileUtils.mkdir_p(dest_path)
|
|
set_extra_attributes_on_path(dest_path)
|
|
end
|
|
|
|
# BUG: create_symlink() does not use &block
|
|
def create_symlink(dest_path)
|
|
stat = nil
|
|
begin
|
|
stat = ::File.lstat(dest_path)
|
|
rescue Errno::ENOENT
|
|
end
|
|
|
|
io = get_input_stream
|
|
linkto = io.read
|
|
|
|
if stat
|
|
if stat.symlink?
|
|
if ::File.readlink(dest_path) == linkto
|
|
return
|
|
else
|
|
raise ::Zip::DestinationFileExistsError,
|
|
"Cannot create symlink '#{dest_path}'. "+
|
|
"A symlink already exists with that name"
|
|
end
|
|
else
|
|
raise ::Zip::DestinationFileExistsError,
|
|
"Cannot create symlink '#{dest_path}'. "+
|
|
"A file already exists with that name"
|
|
end
|
|
end
|
|
|
|
::File.symlink(linkto, dest_path)
|
|
end
|
|
|
|
# apply missing data from the zip64 extra information field, if present
|
|
# (required when file sizes exceed 2**32, but can be used for all files)
|
|
def parse_zip64_extra(for_local_header) #:nodoc:all
|
|
if zip64 = @extra['Zip64']
|
|
if for_local_header
|
|
@size, @compressed_size = zip64.parse(@size, @compressed_size)
|
|
else
|
|
@size, @compressed_size, @local_header_offset = zip64.parse(@size, @compressed_size, @local_header_offset)
|
|
end
|
|
end
|
|
end
|
|
|
|
def data_descriptor_size
|
|
(@gp_flags & 0x0008) > 0 ? 16 : 0
|
|
end
|
|
|
|
# create a zip64 extra information field if we need one
|
|
def prep_zip64_extra(for_local_header) #:nodoc:all
|
|
return unless ::Zip.write_zip64_support
|
|
need_zip64 = @size >= 0xFFFFFFFF || @compressed_size >= 0xFFFFFFFF
|
|
unless for_local_header
|
|
need_zip64 ||= @local_header_offset >= 0xFFFFFFFF
|
|
end
|
|
|
|
if need_zip64
|
|
@version_needed_to_extract = VERSION_NEEDED_TO_EXTRACT_ZIP64
|
|
@extra.delete('Zip64Placeholder')
|
|
zip64 = @extra.create('Zip64')
|
|
if for_local_header
|
|
# local header always includes size and compressed size
|
|
zip64.original_size = @size
|
|
zip64.compressed_size = @compressed_size
|
|
else
|
|
# central directory entry entries include whichever fields are necessary
|
|
zip64.original_size = @size if @size >= 0xFFFFFFFF
|
|
zip64.compressed_size = @compressed_size if @compressed_size >= 0xFFFFFFFF
|
|
zip64.relative_header_offset = @local_header_offset if @local_header_offset >= 0xFFFFFFFF
|
|
end
|
|
else
|
|
@extra.delete('Zip64')
|
|
|
|
# if this is a local header entry, create a placeholder
|
|
# so we have room to write a zip64 extra field afterward
|
|
# (we won't know if it's needed until the file data is written)
|
|
if for_local_header
|
|
@extra.create('Zip64Placeholder')
|
|
else
|
|
@extra.delete('Zip64Placeholder')
|
|
end
|
|
end
|
|
end
|
|
|
|
end
|
|
end
|
|
|
|
# Copyright (C) 2002, 2003 Thomas Sondergaard
|
|
# rubyzip is free software; you can redistribute it and/or
|
|
# modify it under the terms of the ruby license.
|