Restore files from Amazon Glacier in blulk

glacier_restore.rb

#!/usr/bin/env ruby
require 'base64'
require 'openssl'
require 'digest/sha1'
require 'net/http'
require "uri"
require 'time'

DEBUG = false

class GlacierRestore
  def initialize
    @request_params ='?restore'
    @bucket = '[[bucket name]]'
    @host = "#{@bucket}.s3.amazonaws.com"
    @access_key_id = '[[access key id]]'
    @secret_access_key = '[[your secret access key]]'
    @post_body = "<RestoreRequest>\n  <Days>[[num_days]]</Days>\n</RestoreRequest>"
    @md5 = Digest::MD5.base64digest(@post_body)
    @content_type = "text/xml"
  end

  def restore files
    files.each do |file|
      restore_file file.chomp
    end
  end

  def restore_file file_name
    @date = Time.now.httpdate
    @canonicalized_resource = "/#{file_name}#{@request_params}"
    string_to_sign = "POST\n#{@md5}\n#{@content_type}\n#{@date}\n/#{@bucket}#{@canonicalized_resource}"
    @signature = signature string_to_sign

    uri = URI.parse("http://#{@host}")
    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Post.new("http://#{@host}#{@canonicalized_resource}")
    request.add_field('Host', @host)
    request.add_field('Authorization', "AWS #{@access_key_id}:#{@signature}")
    request.add_field('Content-Type', @content_type)
    request.add_field('Content-Length', @post_body.length)
    request.add_field('Date', @date)
    request.add_field('Content-MD5', @md5)
    request.body = @post_body
    response = http.request(request)

    divider = "\n===========\n"
    if DEBUG
      $stderr.puts "Headers:\n "
      $stderr.puts "#{request.to_hash}"
      $stderr.puts divider
      $stderr.puts "Date:\n'#{@date}'"
      $stderr.puts divider
      $stderr.puts "Object name:\n'#{file_name}'"
      $stderr.puts divider
      $stderr.puts "Canonicalized Resource:\n'#{@canonicalized_resource}'"
      $stderr.puts divider
      $stderr.puts "String to sign:\n'#{string_to_sign}'"
      $stderr.puts divider
      $stderr.puts "POST body:\n'#{@post_body}'"
      $stderr.puts divider
      $stderr.puts "Response body:\n'#{response.body}'"
      $stderr.puts divider
      $stderr.puts "Response message:\n'#{response.message}'"
      $stderr.puts divider
      $stderr.puts "Response code:\n'#{response.code}'"
      $stderr.puts divider
      $stderr.puts "Signature:\n'#{@signature}'"
    else
      $stderr.puts "#{response.code} #{response.message} #{response.body.gsub(/<.*?>/, ' ').gsub(/ +/, ' ')}"
    end
    if [200, 202, 409].include?(response.code.to_i)
      $stdout.puts file_name
    end
  end

  def signature string_to_sign
    Base64.encode64(
      OpenSSL::HMAC.digest(
        OpenSSL::Digest::Digest.new('sha1'),
        @secret_access_key, string_to_sign)
    ).chomp
  end
end

if __FILE__ == $0
  glacier = GlacierRestore.new
  files = File.read('files_to_restore.txt').each_line.to_a
  $stderr.puts "Restoring #{files.count} files"
  #if you only want to parse some of the lines
  #files = files[1..10]
  glacier.restore(files)
end

Ahh, bless your heart for this. I ran into the exact same problem.