Class: Vagrant::Util::CurlHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant/util/curl_helper.rb

Constant Summary collapse

SILENCED_HOSTS =

Hosts that do not require notification on redirect

[
  "vagrantcloud-files-production.s3-accelerate.amazonaws.com".freeze,
  "vagrantcloud.com".freeze,
  "vagrantup.com".freeze
].freeze

Class Method Summary collapse

Class Method Details

.capture_output_proc(logger, ui, source = nil) ⇒ Object 



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# File 'lib/vagrant/util/curl_helper.rb', line 15

def self.capture_output_proc(logger, ui, source=nil)
  progress_data = ""
  progress_regexp = /^\r\s*(\d.+?)\r/m

  # Setup the proc that'll receive the real-time data from
  # the downloader.
  data_proc = Proc.new do |type, data|
    # Type will always be "stderr" because that is the only
    # type of data we're subscribed for notifications.

    # Accumulate progress_data
    progress_data << data

    redirect_notify = false
    while true
      # If the download has been redirected and we are no longer downloading
      # from the original host, notify the user that the target host has
      # changed from the source.
      if progress_data.include?("Location")
        location = progress_data.scan(/(^|[^\w-])Location: (.+?)$/m).flatten.compact.last.to_s.strip
        if !location.empty?
          location_uri = URI.parse(location)

          if !location_uri.host.nil? && !redirect_notify
            logger.info("download redirected to #{location}")
            source_uri = URI.parse(source)
            source_host = source_uri.host.to_s.split(".", 2).last
            location_host = location_uri.host.to_s.split(".", 2).last
            if location_host != source_host && !SILENCED_HOSTS.include?(location_host) && !SILENCED_HOSTS.include?(location_uri.host.to_s)
              ui.rewriting do |_ui|
                _ui.clear_line
                _ui.detail "Download redirected to host: #{location_uri.host}"
              end
            end
            redirect_notify = true
          end
        end
        progress_data.replace("")
        break
      end
      # If we have a full amount of column data (two "\r") then
      # we report new progress reports. Otherwise, just keep
      # accumulating.
      match = nil
      check_match = true

      while check_match
        check_match = progress_regexp.match(progress_data)
        if check_match
          data = check_match[1].to_s
          stop = progress_data.index(data) + data.length
          progress_data.slice!(0, stop)

          match = check_match
        end
      end

      break if !match

      # Ignore the first \r and split by whitespace to grab the columns
      columns = data.strip.split(/\s+/)

      # COLUMN DATA:
      #
      # 0 - % total
      # 1 - Total size
      # 2 - % received
      # 3 - Received size
      # 4 - % transferred
      # 5 - Transferred size
      # 6 - Average download speed
      # 7 - Average upload speed
      # 9 - Total time
      # 9 - Time spent
      # 10 - Time left
      # 11 - Current speed
      output = "Progress: #{columns[0]}% (Rate: #{columns[11]}/s, Estimated time remaining: #{columns[10]})"
      ui.rewriting do |ui|
        ui.clear_line
        ui.detail(output, new_line: false)
      end
    end
  end

  return data_proc
end