Class: Backup

Inherits:
Object
  • Object
show all
Defined in:
app/models/backup.rb

Defined Under Namespace

Classes: Entry

Constant Summary collapse

ALLOWED_EXTENSIONS = 
[:tgz, :zip]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(extension) ⇒ Backup

Returns a new instance of Backup.



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# File 'app/models/backup.rb', line 4

def initialize(extension)
  raise "Invalid extension '#{extension}'" unless ALLOWED_EXTENSIONS.include? extension.to_sym
  @extension = extension.to_sym
end

Class Method Details

.each ⇒ Object 



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# File 'app/models/backup.rb', line 54

def each
  Cartoonist::Backup.all.each do |key, proc|
    proc.call.find_each do |value|
      if value.respond_to? :to_backup_entries
        value.to_backup_entries.each do |entry|
          yield entry.with_key(key)
        end
      else
        yield Backup::Entry.from_record(value).with_key(key)
      end
    end
  end
end

Instance Method Details

#content_disposition ⇒ Object 



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# File 'app/models/backup.rb', line 9

def content_disposition
  %{attachment; filename="#{filename}"}
end

#filename ⇒ Object 



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# File 'app/models/backup.rb', line 13

def filename
  prefix = "dev-" unless Rails.env.production?
  "#{prefix}cartoonist-backup-#{Time.now.strftime("%Y-%m-%d_%H%M%S")}.#{@extension}"
end

#stream_to(response) ⇒ Object 



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# File 'app/models/backup.rb', line 18

def stream_to(response)
  response.headers["Content-Disposition"] = content_disposition
  send @extension, response.stream
ensure
  response.stream.close
end

#tgz(stream) ⇒ Object 



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# File 'app/models/backup.rb', line 39

def tgz(stream)
  gzip = Zlib::GzipWriter.new stream

  Archive::Tar::Minitar::Writer.open gzip do |tar|
    Backup.each do |entry|
      tar.add_file_simple entry.path, :mode => 0644, :size => entry.content.length do |output|
        output.write entry.content
      end
    end
  end
ensure
  gzip.close
end

#zip(stream) ⇒ Object

TODO: Maybe investigate zipline gem a little more and figure out how it streams zips, and use that here, so this can be properly streamed.



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# File 'app/models/backup.rb', line 28

def zip(stream)
  buffer = Zip::OutputStream.write_buffer do |zos|
    Backup.each do |entry|
      zos.put_next_entry entry.path
      zos.write entry.content
    end
  end

  stream.write buffer.string
end