Class: CrxUnpack

Inherits:
Object
  • Object
show all
Defined in:
lib/crx_unpack.rb,
lib/crx_unpack/version.rb

Constant Summary collapse

VERSION = 
"0.0.1"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#magic ⇒ Object (readonly)

Returns the value of attribute magic.



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# File 'lib/crx_unpack.rb', line 6

def magic
  @magic
end

#public_key ⇒ Object (readonly)

Returns the value of attribute public_key.



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# File 'lib/crx_unpack.rb', line 6

def public_key
  @public_key
end

#public_key_length ⇒ Object (readonly)

Returns the value of attribute public_key_length.



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# File 'lib/crx_unpack.rb', line 6

def public_key_length
  @public_key_length
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/crx_unpack.rb', line 6

def signature
  @signature
end

#signature_length ⇒ Object (readonly)

Returns the value of attribute signature_length.



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# File 'lib/crx_unpack.rb', line 6

def signature_length
  @signature_length
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/crx_unpack.rb', line 6

def version
  @version
end

#zip ⇒ Object (readonly)

Returns the value of attribute zip.



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# File 'lib/crx_unpack.rb', line 6

def zip
  @zip
end

Class Method Details

.unpack(data) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 61

def unpack(data)
  new.unpack(data)
end

.unpack_contents(data, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 73

def unpack_contents(data, dest, leave_zip_file=false)
  new.unpack_contents(data, dest, leave_zip_file)
end

.unpack_contents_from_file(file, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 81

def unpack_contents_from_file(file, dest, leave_zip_file=false)
  new.unpack_contents_from_file(file, dest, leave_zip_file)
end

.unpack_contents_from_io(io, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 77

def unpack_contents_from_io(io, dest, leave_zip_file=false)
  new.unpack_contents_from_io(io, dest, leave_zip_file)
end

.unpack_from_file(file) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 69

def unpack_from_file(file)
  new.unpack_from_file(file)
end

.unpack_from_io(io) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 65

def unpack_from_io(io)
  new.unpack_from_io(io)
end

Instance Method Details

#unpack(data) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 8

def unpack(data)
  @magic = data.slice!(0, 4)
  @version = data.slice!(0, 4)
  @public_key_length = data.slice!(0, 4).unpack("i*")[0]
  @signature_length = data.slice!(0, 4).unpack("i*")[0]
  @public_key = data.slice!(0, public_key_length)
  @signature = data.slice!(0, signature_length)
  @zip = data
  self
end

#unpack_contents(data, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 28

def unpack_contents(data, dest, leave_zip_file=false)
  unpack(data)
  dest = File.expand_path(dest)
  unless Dir.exists?(dest)
    Dir.mkdir(dest)
  end

  Dir.chdir(dest) do
    zip_file = 'extension.zip'
    open(zip_file, 'wb'){ |f| f.write zip }

    $stdout.reopen('/dev/null') # Ignore `Invalid date/time in zip entry' warning
    zf = Zip::ZipFile.new(zip_file)
    zf.each do |entry|
      zf.extract(entry, entry.to_s)
    end
    $stdout.flush
    $stdout.reopen(STDERR)

    File.unlink(zip_file) unless leave_zip_file
  end
end

#unpack_contents_from_file(file, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 56

def unpack_contents_from_file(file, dest, leave_zip_file=false)
  unpack_contents(open(file, 'rb').read, dest, leave_zip_file)
end

#unpack_contents_from_io(io, dest, leave_zip_file = false) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 51

def unpack_contents_from_io(io, dest, leave_zip_file=false)
  io.binmode? || io.binmode
  unpack_contents(io.read, dest, leave_zip_file)
end

#unpack_from_file(file) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 24

def unpack_from_file(file)
  unpack(open(file, 'rb').read)
end

#unpack_from_io(io) ⇒ Object 



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# File 'lib/crx_unpack.rb', line 19

def unpack_from_io(io)
  io.binmode? || io.binmode
  unpack(io.read)
end