Class: Asciidoctor::Diagram::HttpConverter

Inherits:
Object
  • Object
show all
Includes:
DiagramConverter
Defined in:
lib/asciidoctor-diagram/http/converter.rb

Constant Summary collapse

DEFAULT_MAX_GET_SIZE = 
1024

Instance Method Summary collapse

Methods included from DiagramConverter

#native_scaling?, #wrap_source

Constructor Details

#initialize(base_uri, type, converter) ⇒ HttpConverter

Returns a new instance of HttpConverter.



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# File 'lib/asciidoctor-diagram/http/converter.rb', line 17

def initialize(base_uri, type, converter)
  @base_uri = base_uri
  @type = type
  @converter = converter
end

Instance Method Details

#collect_options(source) ⇒ Object 



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# File 'lib/asciidoctor-diagram/http/converter.rb', line 27

def collect_options(source)
  options = {}

  options[:max_get_size] = source.global_attr('max-get-size', DEFAULT_MAX_GET_SIZE).to_i

  options
end

#convert(source, format, options) ⇒ Object 



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# File 'lib/asciidoctor-diagram/http/converter.rb', line 35

def convert(source, format, options)
  code = source.code

  uri = URI(@base_uri)

  case @type
  when :plantuml
    deflate = Zlib::Deflate.new(Zlib::BEST_COMPRESSION,
                                -Zlib::MAX_WBITS,
                                Zlib::MAX_MEM_LEVEL,
                                Zlib::DEFAULT_STRATEGY)

    compressed = deflate.deflate(code, Zlib::FINISH)
    deflate.close

    data = Base64.urlsafe_encode(compressed)
    # See https://plantuml.com/text-encoding
    # PlantUML uses a different alphabet than the one from RFC 4648
    data.tr!(
      'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
      '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    )

    path = uri.path.dup
    path << '/' unless path.end_with? '/'
    path << format.to_s
  when :kroki_io
    compressed = Zlib.deflate(code, Zlib::BEST_COMPRESSION)
    data = Base64.urlsafe_encode(compressed)

    path = uri.path.dup
    path << '/' unless path.end_with? '/'
    path << source.diagram_type.to_s
    path << '/' << format.to_s
  else
    raise "Unsupported server type: " + @type
  end

  get_path = path.dup << '/' << data

  if get_path.length > options[:max_get_size]
    uri.path = path
    get_uri(uri, code, 'text/plain; charset=utf-8')
  else
    uri.path = get_path
    get_uri(uri)
  end
end

#supported_formats ⇒ Object 



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# File 'lib/asciidoctor-diagram/http/converter.rb', line 23

def supported_formats
  @converter.supported_formats
end