Recovering from corrupted archives

Using Salvage Mode 

require 'cabriolet'

# Enable salvage mode for corrupted CAB
extractor = Cabriolet::CAB::Extractor.new(
  salvage_mode: true,
  skip_checksum: true
)

begin
  cabinet = extractor.parse('corrupted.cab')

  # Extract what we can
  cabinet.files.each do |file|
    begin
      File.write("recovered/#{file.name}", file.data, mode: 'wb')
      puts "✓ Recovered: #{file.name}"
    rescue => e
      puts "✗ Failed: #{file.name} - #{e.message}"
    end
  end
rescue => e
  puts "Partial recovery attempted: #{e.message}"
end

Partial Recovery 

require 'cabriolet'

# Try to recover files one by one
cabinet = Cabriolet::CAB::Parser.new.parse('damaged.cab')

recovered = 0
failed = 0

cabinet.files.each do |file|
  begin
    data = file.data  # May raise on corruption
    File.write("output/#{file.name}", data, mode: 'wb')
    recovered += 1
  rescue => e
    failed += 1
    puts "Could not recover #{file.name}: #{e.message}"
  end
end

puts "Recovered: #{recovered}, Failed: #{failed}"

See also