Module: Nutkins::Download

Defined in:
lib/nutkins/download.rb

Class Method Summary collapse

Class Method Details

.download_file(url, output) ⇒ Object 



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# File 'lib/nutkins/download.rb', line 6

def self.download_file url, output
  orig_url = url
  tries = 10
  while (tries -= 1) >= 0
    response = Net::HTTP.get_response(URI(url))
    case response
    when Net::HTTPRedirection
      url = response["location"]
    else
      open(output, "wb") do |file|
        file.write(response.body)
      end
      return
    end
  end

  raise "could not download #{orig_url}"
end

.download_resources(img_dir, resources) ⇒ Object 



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# File 'lib/nutkins/download.rb', line 25

def self.download_resources img_dir, resources
  resources.each do |resource|
    source = resource["source"]
    dest = File.join(img_dir, resource["dest"])
    unless File.exists? dest
      extract = resource["extract"]
      if extract
        uri = URI.parse(source)
        Dir.mktmpdir do |tmpdir|
          dl_dest = File.join tmpdir, File.basename(uri.path)
          print "downloading #{source} to #{dl_dest}"
          download_file source, dl_dest
          puts " - done"
          File.open(dl_dest, "rb") do |file|
            Zlib::GzipReader.wrap(file) do |gz|
              Gem::Package::TarReader.new(gz) do |tar|
                matching = tar.detect { |entry| File.fnmatch(extract, entry.full_name) }
                raise "could not find file matching #{extract} in #{dl_dest}" unless matching
                FileUtils.mkdir_p File.dirname(dest)
                File.write(dest, matching.read)
              end
            end
          end
        end
      else
        FileUtils.mkdir_p File.dirname(dest)
        print "downloading #{source} to #{dest}"
        download_file source, dest
        puts " - done"
      end

      mode = resource["mode"]
      File.chmod(mode, dest) if mode
    end
  end
end