Module: Omnizip::Buffer::SevenZipBridge

Defined in:
lib/omnizip/buffer/seven_zip_bridge.rb

Overview

Bridges the in-memory Buffer API onto the file-based 7z reader/writer through a temporary file, since the 7z format has no in-memory stream implementation.

Defined Under Namespace

Classes: ReadProxy, WriteProxy

Class Method Summary collapse

Class Method Details

.create(buffer, options = {}) {|WriteProxy| ... } ⇒ Object

Create a 7z archive in memory

Parameters:

  • buffer (StringIO) —

    Destination buffer

  • options (Hash) (defaults to: {}) —

    Writer options

Yields:



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# File 'lib/omnizip/buffer/seven_zip_bridge.rb', line 18

def create(buffer, options = {}, &block)
  Dir.mktmpdir("omnizip_buffer_7z") do |tmp|
    archive_path = File.join(tmp, "buffer.7z")
    writer = Formats::SevenZip::Writer.new(archive_path, options)
    block&.call(WriteProxy.new(writer))
    writer.write

    buffer.write(File.binread(archive_path))
  end
end

.open(buffer) {|ReadProxy| ... } ⇒ ReadProxy, Object

Read a 7z archive from memory

Parameters:

  • buffer (StringIO) —

    Archive bytes

Yields:

Returns:

  • (ReadProxy, Object) —

    Proxy or block result



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# File 'lib/omnizip/buffer/seven_zip_bridge.rb', line 34

def open(buffer, &block)
  Dir.mktmpdir("omnizip_buffer_7z") do |tmp|
    archive_path = File.join(tmp, "buffer.7z")
    File.binwrite(archive_path, buffer.string)

    reader = Formats::SevenZip::Reader.new(archive_path)
    reader.open
    proxy = ReadProxy.new(reader, tmp)

    block ? yield(proxy) : proxy
  end
end