Class: Zip::ZipEntry

Inherits:
Object show all
Defined in:
lib/zip/zip.rb

Direct Known Subclasses

ZipStreamableDirectory, ZipStreamableStream

Constant Summary collapse

STORED = 
0
DEFLATED = 
8
FSTYPE_FAT = 
0
FSTYPE_AMIGA = 
1
FSTYPE_VMS = 
2
FSTYPE_UNIX = 
3
FSTYPE_VM_CMS = 
4
FSTYPE_ATARI = 
5
FSTYPE_HPFS = 
6
FSTYPE_MAC = 
7
FSTYPE_Z_SYSTEM = 
8
FSTYPE_CPM = 
9
FSTYPE_TOPS20 = 
10
FSTYPE_NTFS = 
11
FSTYPE_QDOS = 
12
FSTYPE_ACORN = 
13
FSTYPE_VFAT = 
14
FSTYPE_MVS = 
15
FSTYPE_BEOS = 
16
FSTYPE_TANDEM = 
17
FSTYPE_THEOS = 
18
FSTYPE_MAC_OSX = 
19
FSTYPE_ATHEOS = 
30
FSTYPES = 
{
  FSTYPE_FAT => 'FAT'.freeze,
  FSTYPE_AMIGA => 'Amiga'.freeze,
  FSTYPE_VMS => 'VMS (Vax or Alpha AXP)'.freeze,
  FSTYPE_UNIX => 'Unix'.freeze,
  FSTYPE_VM_CMS => 'VM/CMS'.freeze,
  FSTYPE_ATARI => 'Atari ST'.freeze,
  FSTYPE_HPFS => 'OS/2 or NT HPFS'.freeze,
  FSTYPE_MAC => 'Macintosh'.freeze,
  FSTYPE_Z_SYSTEM => 'Z-System'.freeze,
  FSTYPE_CPM => 'CP/M'.freeze,
  FSTYPE_TOPS20 => 'TOPS-20'.freeze,
  FSTYPE_NTFS => 'NTFS'.freeze,
  FSTYPE_QDOS => 'SMS/QDOS'.freeze,
  FSTYPE_ACORN => 'Acorn RISC OS'.freeze,
  FSTYPE_VFAT => 'Win32 VFAT'.freeze,
  FSTYPE_MVS => 'MVS'.freeze,
  FSTYPE_BEOS => 'BeOS'.freeze,
  FSTYPE_TANDEM => 'Tandem NSK'.freeze,
  FSTYPE_THEOS => 'Theos'.freeze,
  FSTYPE_MAC_OSX => 'Mac OS/X (Darwin)'.freeze,
  FSTYPE_ATHEOS => 'AtheOS'.freeze,
}.freeze
LOCAL_ENTRY_SIGNATURE = 
0x04034b50
LOCAL_ENTRY_STATIC_HEADER_LENGTH = 
30
LOCAL_ENTRY_TRAILING_DESCRIPTOR_LENGTH = 
4+4+4
CENTRAL_DIRECTORY_ENTRY_SIGNATURE = 
0x02014b50
CDIR_ENTRY_STATIC_HEADER_LENGTH = 
46

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(zipfile = "", name = "", comment = "", extra = "", compressed_size = 0, crc = 0, compression_method = ZipEntry::DEFLATED, size = 0, time = Time.now) ⇒ ZipEntry

Returns a new instance of ZipEntry.



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# File 'lib/zip/zip.rb', line 351

def initialize(zipfile = "", name = "", comment = "", extra = "", 
               compressed_size = 0, crc = 0, 
 compression_method = ZipEntry::DEFLATED, size = 0,
 time  = Time.now)
  super()
  if name.starts_with("/")
  raise ZipEntryNameError, "Illegal ZipEntry name '#{name}', name must not start with /" 
  end
  @localHeaderOffset = 0
  @internalFileAttributes = 1
  @externalFileAttributes = 0
  @version = 52 # this library's version
  @ftype = nil # unspecified or unknown
  @filepath = nil
  if Zip::RUNNING_ON_WINDOWS
    @fstype = FSTYPE_FAT
  else
    @fstype = FSTYPE_UNIX
  end
  @zipfile, @comment, @compressed_size, @crc, @extra, @compression_method, 
  @name, @size = zipfile, comment, compressed_size, crc, 
  extra, compression_method, name, size
  @time = time

  @follow_symlinks = false

  @restore_times = true
  @restore_permissions = false
  @restore_ownership = false

# BUG: need an extra field to support uid/gid's
  @unix_uid = nil
  @unix_gid = nil
  @unix_perms = nil
#      @posix_acl = nil
#      @ntfs_acl = nil

  if name_is_directory?
    @ftype = :directory
  else
    @ftype = :file
  end

  unless ZipExtraField === @extra
    @extra = ZipExtraField.new(@extra.to_s)
  end

  @versionNeededToExtract = 0 #i doubt 0 is correct but it needs to be an integer
end

Instance Attribute Details

#comment ⇒ Object

Returns the value of attribute comment.



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# File 'lib/zip/zip.rb', line 342

def comment
  @comment
end

#compressed_size ⇒ Object

Returns the value of attribute compressed_size.



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# File 'lib/zip/zip.rb', line 342

def compressed_size
  @compressed_size
end

#compression_method ⇒ Object

Returns the value of attribute compression_method.



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# File 'lib/zip/zip.rb', line 342

def compression_method
  @compression_method
end

#crc ⇒ Object

Returns the value of attribute crc.



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# File 'lib/zip/zip.rb', line 342

def crc
  @crc
end

#externalFileAttributes ⇒ Object

Returns the value of attribute externalFileAttributes.



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# File 'lib/zip/zip.rb', line 342

def externalFileAttributes
  @externalFileAttributes
end

#extra ⇒ Object

Returns the value of attribute extra.



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# File 'lib/zip/zip.rb', line 342

def extra
  @extra
end

#filepath ⇒ Object (readonly)

:nodoc:



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# File 'lib/zip/zip.rb', line 349

def filepath
  @filepath
end

#follow_symlinks ⇒ Object

Returns the value of attribute follow_symlinks.



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# File 'lib/zip/zip.rb', line 345

def follow_symlinks
  @follow_symlinks
end

#fstype ⇒ Object

Returns the value of attribute fstype.



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# File 'lib/zip/zip.rb', line 342

def fstype
  @fstype
end

#ftype ⇒ Object (readonly)

:nodoc:



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# File 'lib/zip/zip.rb', line 349

def ftype
  @ftype
end

#gp_flags ⇒ Object

Returns the value of attribute gp_flags.



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# File 'lib/zip/zip.rb', line 342

def gp_flags
  @gp_flags
end

#header_signature ⇒ Object

Returns the value of attribute header_signature.



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# File 'lib/zip/zip.rb', line 342

def header_signature
  @header_signature
end

#localHeaderOffset ⇒ Object

Returns the value of attribute localHeaderOffset.



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# File 'lib/zip/zip.rb', line 342

def localHeaderOffset
  @localHeaderOffset
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/zip/zip.rb', line 342

def name
  @name
end

#restore_ownership ⇒ Object

Returns the value of attribute restore_ownership.



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# File 'lib/zip/zip.rb', line 346

def restore_ownership
  @restore_ownership
end

#restore_permissions ⇒ Object

Returns the value of attribute restore_permissions.



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# File 'lib/zip/zip.rb', line 346

def restore_permissions
  @restore_permissions
end

#restore_times ⇒ Object

Returns the value of attribute restore_times.



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# File 'lib/zip/zip.rb', line 346

def restore_times
  @restore_times
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/zip/zip.rb', line 342

def size
  @size
end

#unix_gid ⇒ Object

Returns the value of attribute unix_gid.



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# File 'lib/zip/zip.rb', line 347

def unix_gid
  @unix_gid
end

#unix_perms ⇒ Object

Returns the value of attribute unix_perms.



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# File 'lib/zip/zip.rb', line 347

def unix_perms
  @unix_perms
end

#unix_uid ⇒ Object

Returns the value of attribute unix_uid.



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# File 'lib/zip/zip.rb', line 347

def unix_uid
  @unix_uid
end

#zipfile ⇒ Object

Returns the value of attribute zipfile.



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# File 'lib/zip/zip.rb', line 342

def zipfile
  @zipfile
end

Class Method Details

.read_c_dir_entry(io) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 657

def ZipEntry.read_c_dir_entry(io)  #:nodoc:all
  entry = new(io.path)
  entry.read_c_dir_entry(io)
  return entry
rescue ZipError
  return nil
end

.read_local_entry(io) ⇒ Object 



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# File 'lib/zip/zip.rb', line 545

def ZipEntry.read_local_entry(io)
  entry = new(io.path)
  entry.read_local_entry(io)
  return entry
rescue ZipError
  return nil
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/zip/zip.rb', line 759

def <=> (other)
  return to_s <=> other.to_s
end

#==(other) ⇒ Object 



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# File 'lib/zip/zip.rb', line 746

def == (other)
  return false unless other.class == self.class
  # Compares contents of local entry and exposed fields
  (@compression_method == other.compression_method &&
   @crc               == other.crc         &&
   @compressed_size   == other.compressed_size   &&
   @size              == other.size              &&
   @name              == other.name              &&
   @extra             == other.extra             &&
   @filepath          == other.filepath          &&
   self.time.dos_equals(other.time))
end

#calculate_local_header_size ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 451

def calculate_local_header_size  #:nodoc:all
  LOCAL_ENTRY_STATIC_HEADER_LENGTH + (@name ?  @name.bytesize : 0) + (@extra ? @extra.local_size : 0)
end

#cdir_header_size ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 455

def cdir_header_size  #:nodoc:all
  CDIR_ENTRY_STATIC_HEADER_LENGTH  + (@name ?  @name.bytesize : 0) +
  (@extra ? @extra.c_dir_size : 0) + (@comment ? @comment.size : 0)
end

#directory? ⇒ Boolean Also known as: is_directory

Returns true if the entry is a directory.

Returns:

  • (Boolean)

Raises:



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# File 'lib/zip/zip.rb', line 425

def directory?
  raise ZipInternalError, "current filetype is unknown: #{self.inspect}" unless @ftype
  @ftype == :directory
end

#extract(destPath = @name, &onExistsProc) ⇒ Object

Extracts entry to file destPath (defaults to @name).



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# File 'lib/zip/zip.rb', line 465

def extract(destPath = @name, &onExistsProc)
  onExistsProc ||= proc { false }

  if directory?
  create_directory(destPath, &onExistsProc)
  elsif file?
  write_file(destPath, &onExistsProc) 
  elsif symlink?
    create_symlink(destPath, &onExistsProc)
  else
    raise RuntimeError, "unknown file type #{self.inspect}"
  end

  self
end

#file? ⇒ Boolean

Returns true if the entry is a file.

Returns:

  • (Boolean)

Raises:



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# File 'lib/zip/zip.rb', line 432

def file?
  raise ZipInternalError, "current filetype is unknown: #{self.inspect}" unless @ftype
  @ftype == :file
end

#file_stat(path) ⇒ Object

:nodoc:



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# File 'lib/zip/zip.rb', line 665

def file_stat(path) # :nodoc:
  if @follow_symlinks
    return File::stat(path)
  else
    return File::lstat(path)
  end
end

#gather_fileinfo_from_srcpath(srcPath) ⇒ Object

:nodoc:



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# File 'lib/zip/zip.rb', line 797

def gather_fileinfo_from_srcpath(srcPath) # :nodoc:
  stat = file_stat(srcPath)
  case stat.ftype
  when 'file'
    if name_is_directory?
      raise ArgumentError,
 "entry name '#{newEntry}' indicates directory entry, but "+
 "'#{srcPath}' is not a directory"
    end
    @ftype = :file
  when 'directory'
    if ! name_is_directory?
      @name += "/"
    end
    @ftype = :directory
  when 'link'
    if name_is_directory?
      raise ArgumentError,
 "entry name '#{newEntry}' indicates directory entry, but "+
 "'#{srcPath}' is not a directory"
    end
    @ftype = :symlink
  else
    raise RuntimeError, "unknown file type: #{srcPath.inspect} #{stat.inspect}"
  end

  @filepath = srcPath
  get_extra_attributes_from_path(@filepath)
end

#get_extra_attributes_from_path(path) ⇒ Object

:nodoc:



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# File 'lib/zip/zip.rb', line 673

def get_extra_attributes_from_path(path)  # :nodoc:
  unless Zip::RUNNING_ON_WINDOWS
    stat = file_stat(path)
    @unix_uid = stat.uid
    @unix_gid = stat.gid
    @unix_perms = stat.mode & 07777
  end
end

#get_input_stream(&aProc) ⇒ Object

Returns an IO like object for the given ZipEntry. Warning: may behave weird with symlinks.



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# File 'lib/zip/zip.rb', line 765

def get_input_stream(&aProc)
  if @ftype == :directory
      return yield(NullInputStream.instance) if block_given?
      return NullInputStream.instance
  elsif @filepath
    case @ftype
    when :file
      return File.open(@filepath, "rb", &aProc)

    when :symlink
      linkpath = File::readlink(@filepath)
      stringio = StringIO.new(linkpath)
      return yield(stringio) if block_given?
      return stringio
    else
      raise "unknown @ftype #{@ftype}"
    end
  else
    zis = ZipInputStream.new(@zipfile, localHeaderOffset)
    zis.get_next_entry
    if block_given?
      begin
 return yield(zis)
    ensure
 zis.close
    end
    else
    return zis
    end
  end
end

#get_raw_input_stream(&aProc) ⇒ Object 



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# File 'lib/zip/zip.rb', line 844

def get_raw_input_stream(&aProc)
  File.open(@zipfile, "rb", &aProc)
end

#gp_flags_for_write ⇒ Object 



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# File 'lib/zip/zip.rb', line 575

def gp_flags_for_write
  gp_flags = 0
  gp_flags += 2048 if @name.encoding == Encoding::UTF_8

  gp_flags
end

#is_utf8? ⇒ Boolean

checking specifically for utf-8 as its the only encoding we can choose

Returns:

  • (Boolean) 


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# File 'lib/zip/zip.rb', line 401

def is_utf8? #checking specifically for utf-8 as its the only encoding we can choose
  @gp_flags >> 11 == 1
end

#local_entry_offset ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 447

def local_entry_offset  #:nodoc:all
  localHeaderOffset + @local_header_size
end

#name_is_directory? ⇒ Boolean

:nodoc:all

Returns:

  • (Boolean) 


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# File 'lib/zip/zip.rb', line 443

def name_is_directory?  #:nodoc:all
  (%r{\/$} =~ @name) != nil
end

#next_header_offset ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 460

def next_header_offset  #:nodoc:all
  local_entry_offset + self.compressed_size
end

#parent_as_string ⇒ Object 



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# File 'lib/zip/zip.rb', line 838

def parent_as_string
  entry_name = name.chomp("/")
  slash_index = entry_name.rindex("/")
  slash_index ? entry_name.slice(0, slash_index+1) : nil
end

#read_c_dir_entry(io) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 582

def read_c_dir_entry(io)  #:nodoc:all
  staticSizedFieldsBuf = io.read(CDIR_ENTRY_STATIC_HEADER_LENGTH)
  unless (staticSizedFieldsBuf.size == CDIR_ENTRY_STATIC_HEADER_LENGTH)
  raise ZipError, "Premature end of file. Not enough data for zip cdir entry header"
  end

  @header_signature          ,
  @version               , # version of encoding software
    @fstype                , # filesystem type
  @versionNeededToExtract,
  @gp_flags               ,
  @compression_method     ,
  lastModTime            ,
  lastModDate            ,
  @crc                   ,
  @compressed_size        ,
  @size                  ,
  nameLength             ,
  extraLength            ,
  commentLength          ,
  diskNumberStart        ,
  @internalFileAttributes,
  @externalFileAttributes,
  @localHeaderOffset     ,
  @name                  ,
  @extra                 ,
  @comment               = staticSizedFieldsBuf.unpack('VCCvvvvvVVVvvvvvVV')

  unless (@header_signature == CENTRAL_DIRECTORY_ENTRY_SIGNATURE)
  raise ZipError, "Zip local header magic not found at location '#{localHeaderOffset}'"
  end
  set_time(lastModDate, lastModTime)
  
  @name                  = io.read(nameLength)
  if self.is_utf8?
    @name = @name.force_encoding('UTF-8')
  else
    @name = @name.force_encoding('CP437')
  end
  
  if ZipExtraField === @extra
    @extra.merge(io.read(extraLength))
  else
    @extra = ZipExtraField.new(io.read(extraLength))
  end
  @comment               = io.read(commentLength)
  unless (@comment && @comment.length == commentLength)
  raise ZipError, "Truncated cdir zip entry header"
  end

  case @fstype
  when FSTYPE_UNIX
    @unix_perms = (@externalFileAttributes >> 16) & 07777

    case (@externalFileAttributes >> 28)
    when 04
      @ftype = :directory
    when 010
      @ftype = :file
    when 012
      @ftype = :link
    else
      raise ZipInternalError, "unknown file type #{'0%o' % (@externalFileAttributes >> 28)}"
    end
  else
    if name_is_directory?
      @ftype = :directory
    else
      @ftype = :file
    end
  end
  @local_header_size = calculate_local_header_size
  
end

#read_local_entry(io) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 500

def read_local_entry(io)  #:nodoc:all
  @localHeaderOffset = io.tell
  staticSizedFieldsBuf = io.read(LOCAL_ENTRY_STATIC_HEADER_LENGTH)
  unless (staticSizedFieldsBuf.size==LOCAL_ENTRY_STATIC_HEADER_LENGTH)
  raise ZipError, "Premature end of file. Not enough data for zip entry local header"
  end
  
  @header_signature       ,
    @version          ,
  @fstype           ,
  @gp_flags          ,
  @compression_method,
  lastModTime       ,
  lastModDate       ,
  @crc              ,
  @compressed_size   ,
  @size             ,
  nameLength        ,
  extraLength       = staticSizedFieldsBuf.unpack('VCCvvvvVVVvv') 

  unless (@header_signature == LOCAL_ENTRY_SIGNATURE)
  raise ZipError, "Zip local header magic not found at location '#{localHeaderOffset}'"
  end
  set_time(lastModDate, lastModTime)
  @name              = io.read(nameLength)
  if self.is_utf8?
    @name = @name.force_encoding('UTF-8')
  else
    @name = @name.force_encoding('CP437')
  end
  extra              = io.read(extraLength)

  if (extra && extra.length != extraLength)
  raise ZipError, "Truncated local zip entry header"
  else
    if ZipExtraField === @extra
      @extra.merge(extra)
    else
      @extra = ZipExtraField.new(extra)
    end
  end
  @local_header_size = calculate_local_header_size

end

#set_extra_attributes_on_path(destPath) ⇒ Object

:nodoc:



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# File 'lib/zip/zip.rb', line 682

def set_extra_attributes_on_path(destPath)  # :nodoc:
  return unless (file? or directory?)

  case @fstype
  when FSTYPE_UNIX
    # BUG: does not update timestamps into account
    # ignore setuid/setgid bits by default.  honor if @restore_ownership
    unix_perms_mask = 01777
    unix_perms_mask = 07777 if (@restore_ownership)
    File::chmod(@unix_perms & unix_perms_mask, destPath) if (@restore_permissions && @unix_perms)
    File::chown(@unix_uid, @unix_gid, destPath) if (@restore_ownership && @unix_uid && @unix_gid && Process::egid == 0)
    # File::utimes()
  end
end

#symlink? ⇒ Boolean

Returns true if the entry is a symlink.

Returns:

  • (Boolean)

Raises:



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# File 'lib/zip/zip.rb', line 438

def symlink?
  raise ZipInternalError, "current filetype is unknown: #{self.inspect}" unless @ftype
  @ftype == :link
end

#time ⇒ Object Also known as: mtime 



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# File 'lib/zip/zip.rb', line 405

def time
  if @extra["UniversalTime"]
    @extra["UniversalTime"].mtime
  else
    # Atandard time field in central directory has local time
    # under archive creator. Then, we can't get timezone.
    @time
  end
end

#time=(aTime) ⇒ Object 



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# File 'lib/zip/zip.rb', line 416

def time=(aTime)
  unless @extra.member?("UniversalTime")
    @extra.create("UniversalTime")
  end
  @extra["UniversalTime"].mtime = aTime
  @time = aTime
end

#to_s ⇒ Object 



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# File 'lib/zip/zip.rb', line 481

def to_s
  @name
end

#write_c_dir_entry(io) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 697

def write_c_dir_entry(io)  #:nodoc:all
  case @fstype
    when FSTYPE_UNIX
      ft = nil
      case @ftype
        when :file
          ft = 010
          @unix_perms ||= 0644
        when :directory
          ft = 004
          @unix_perms ||= 0755
        when :symlink
          ft = 012
          @unix_perms ||= 0755
        else
          raise ZipInternalError, "unknown file type #{self.inspect}"
      end

      @externalFileAttributes = (ft << 12 | (@unix_perms & 07777)) << 16
  end

  io <<
          [CENTRAL_DIRECTORY_ENTRY_SIGNATURE,
           @version                          , # version of encoding software
           @fstype                           , # filesystem type
           @versionNeededToExtract           , # @versionNeededToExtract           ,
           self.gp_flags_for_write           , # @gp_flags                          ,
           @compression_method                ,
           @time.to_binary_dos_time             , # @lastModTime                      ,
           @time.to_binary_dos_date             , # @lastModDate                      ,
           @crc                              ,
           @compressed_size                   ,
           @size                             ,
           @name  ?  @name.bytesize  : 0       ,
           @extra ? @extra.c_dir_length : 0  ,
           @comment ? comment.length : 0     ,
           0                                 , # disk number start
           @internalFileAttributes           , # file type (binary=0, text=1)
           @externalFileAttributes           , # native filesystem attributes
           @localHeaderOffset                ,
           @name                             ,
           @extra                            ,
           @comment                          ].pack('VCCvvvvvVVVvvvvvVV')

  io << @name
  io << (@extra ? @extra.to_c_dir_bin : "")
  io << @comment
end

#write_local_entry(io) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 553

def write_local_entry(io)   #:nodoc:all
  @localHeaderOffset = io.tell

  io <<
          [LOCAL_ENTRY_SIGNATURE    ,
           @versionNeededToExtract                  ,
           self.gp_flags_for_write    , # @gp_flags                  ,
           @compression_method        ,
           @time.to_binary_dos_time     , # @lastModTime              ,
           @time.to_binary_dos_date     , # @lastModDate              ,
           @crc                      ,
           @compressed_size           ,
           @size                     ,
           @name ? @name.bytesize   : 0,
           @extra? @extra.local_length : 0 ].pack('VvvvvvVVVvv')
  io << @name
  io << (@extra ? @extra.to_local_bin : "")
end

#write_to_zip_output_stream(aZipOutputStream) ⇒ Object

:nodoc:all



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# File 'lib/zip/zip.rb', line 827

def write_to_zip_output_stream(aZipOutputStream)  #:nodoc:all
  if @ftype == :directory
    aZipOutputStream.put_next_entry(self)
  elsif @filepath
    aZipOutputStream.put_next_entry(self)
    get_input_stream { |is| IOExtras.copy_stream(aZipOutputStream, is) } 
  else
    aZipOutputStream.copy_raw_entry(self)
  end
end