Class: Jekyll::PlantumlBlock

Inherits:
Liquid::Block
  • Object
show all
Defined in:
lib/jekyll-plantuml-url.rb

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, tokens) ⇒ PlantumlBlock

Returns a new instance of PlantumlBlock.



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# File 'lib/jekyll-plantuml-url.rb', line 32

def initialize(tag_name, markup, tokens)
  super
  @html = (markup or '').strip
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/jekyll-plantuml-url.rb', line 37

def render(context)
  site = context.registers[:site]
  name = Digest::MD5.hexdigest(super)
  if site.config['plantuml']
    uml_config=site.config['plantuml']
  else
    puts "** No configuration for plantuml in present in _config.yml, using default"
    #Jekyll.logger.debug "No configuration for plantuml in present in _config.yml, using default";
    uml_config={
      'type'         => 'svg',
      'url'          => 'http://www.plantuml.com/plantuml',
      'ssl_noverify' => '0',
      'http_debug'   => '0'
    }
  end
  if uml_config['type'] == ""
    uml_type="svg"
  else
    uml_type=uml_config['type']
  end
  if !File.exists?(File.join(site.dest, "uml/#{name}.#{uml_type}"))
    uml_out_file = File.join(site.source, "uml/#{name}.#{uml_type}")
    if File.exists?(uml_out_file)
      puts "File #{uml_out_file} already exists (#{File.size(uml_out_file)} bytes)"
    else
      if uml_config['url'] == ""
        uml_url="http://www.plantuml.com/plantuml"
        puts "using default url: #{uml_url}"
      else
        uml_url=uml_config['url']
        puts "using config url: #{uml_url}"
      end
      uri = URI.parse(uml_url)
      http = Net::HTTP.new(uri.host, uri.port)
      if uri.scheme == "https"
        http.use_ssl = true
        if uml_config['ssl_noverify'] == "1"
          http.verify_mode = OpenSSL::SSL::VERIFY_NONE
        end
      end
      if uml_config['http_debug'] == "1"
        puts "*** http debug on ***"
        http.set_debug_output $stderr
      end

      request = Net::HTTP::Post.new("#{uri.path}/form")
      request.add_field('Content-Type', 'application/x-www-form-urlencoded')
      request.body = "text=" + URI::encode("@startuml\n"+super+"\n@enduml\n".force_encoding('ASCII-8BIT'))
      response = http.request(request)

      if response.code == "302" or response.code == "301"
        # expected redirect of 302 with a new url with code-hash
        newlocation=response["Location"]
        newlocation["/uml/"]= "/#{uml_type}/"
        begin # loop for 301 and 302 of the code request
          newuri = URI.parse(newlocation)
          if newuri.host != uri.host or newuri.port != uri.port or newuri.scheme != uri.scheme
            http = Net::HTTP.new(newuri.host, newuri.port)
            if newuri.scheme == "https"
              http.use_ssl = true
              if uml_config['ssl_noverify'] == "1"
                http.verify_mode = OpenSSL::SSL::VERIFY_NONE
              end
            end
            if uml_config['http_debug'] == "1"
              puts "*** http debug on ***"
              http.set_debug_output $stderr
            end
          end
          request_img = Net::HTTP::Get.new(newuri.path)
          response_img = http.request(request_img)
          if response_img.code == "200"
            #puts response_img.body
            FileUtils.mkdir_p(File.dirname(uml_out_file))
            File.open(uml_out_file, 'w') { |f|
              f.write(response_img.body)
            }
            site.static_files << Jekyll::StaticFile.new( site, site.source, 'uml', "#{name}.#{uml_type}")
            puts "File #{uml_out_file} created (#{File.size(uml_out_file)} bytes)"
          elsif response_img.code == "302" or response_img.code == "301"
            # not expected www.plantuml.com redirect to plantuml.com, what a waste of time
            # it is what it is
            newlocation=response_img["Location"]
          else
            puts "error #{response_img.code} getting #{uri.host}#{request_img}"
          end
        end while  response_img.code == "302" or response_img.code == "301"
      else
        puts "Error #{response.code} getting #{uri.host}/plantuml/form "
      end
    end
  end
  "<p><img src='#{site.baseurl}/uml/#{name}.#{uml_type}' #{@html}
    alt='PlantUML #{uml_type} diagram' class='plantuml'/></p>"
end