Class: ChupaText::Decomposers::WebKit::ExternalScreenshoter

Inherits:
Object
  • Object
show all
Includes:
LogTag, Loggable
Defined in:
lib/chupa-text/decomposers/webkit.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ExternalScreenshoter

Returns a new instance of ExternalScreenshoter.



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# File 'lib/chupa-text/decomposers/webkit.rb', line 92

def initialize
  @screenshoter = File.join(__dir__,
                            "..",
                            "..",
                            "..",
                            "bin",
                            "chupa-text-decomposer-webkit-screenshoter")
  @command = ExternalCommand.new(RbConfig.ruby)
end

Instance Method Details

#run(html_path, uri, output_path, width, height) ⇒ Object 



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# File 'lib/chupa-text/decomposers/webkit.rb', line 102

def run(html_path, uri, output_path, width, height)
  output_read, output_write = IO.pipe
  error_output = Tempfile.new("chupa-text-decomposer-webkit-error")
  output_reader = Thread.new do
    loop do
      IO.select([output_read])
      line = output_read.gets
      break if line.nil?

      case line.chomp
      when /\Adebug: /
        debug($POSTMATCH)
      when /\Aerror: /
        error($POSTMATCH)
      end
    end
  end
  successed = @command.run(@screenshoter,
                           html_path,
                           uri,
                           output_path,
                           width.to_s,
                           height.to_s,
                           {
                             :spawn_options => {
                               :out => output_write,
                               :err => error_output.path,
                             },
                           })
  output_write.close
  output_reader.join

  unless successed
    error do
      message = "failed to external screenshoter: #{uri}: "
      message << "#{@command.path} #{@screenshoter}"
      "#{log_tag}[external-screenshoter][run][failed] #{message}"
    end
  end
  unless error_output.size.zero?
    error_output.each_line do |line|
      error(line)
    end
  end
end