• sample08.rb

  • ¶

    GET request

    get '/sample-8-how-to-return-a-url-representing-a-single-page-of-a-document' do
      haml :sample08
    end
  • ¶

    POST request

    post '/sample-8-how-to-return-a-url-representing-a-single-page-of-a-document' do
  • ¶

    Set variables

      set :client_id, params[:clientId]
      set :private_key, params[:privateKey]
      set :guid, params[:guid]
      set :page_number, params[:pageNumber]
      set :source, params[:source]
      set :file_id, params[:fileId]
      set :base_path, params[:basePath]
    
      begin
  • ¶

    Check required variables

        raise 'Please enter all required parameters' if settings.client_id.empty? or settings.private_key.empty?
  • ¶

    Prepare base path

        if settings.base_path.empty?
          base_path = 'https://api.groupdocs.com'
        elsif settings.base_path.match('/v2.0')
          base_path = settings.base_path.split('/v2.0')[0]
        else
          base_path = settings.base_path
        end
  • ¶

    Configure your access to API server

        GroupDocs.configure do |groupdocs|
          groupdocs.client_id = settings.client_id
          groupdocs.private_key = settings.private_key
  • ¶

    Optionally specify API server and version

          groupdocs.api_server = base_path # default is 'https://api.groupdocs.com'
        end
    
        file = nil
        doc = nil
        metadata = nil
  • ¶

    Get document by file GUID

        case settings.source
          when 'guid'
            file = GroupDocs::Storage::File.new({:guid => settings.file_id})
          when 'local'
  • ¶

    Construct path

            filepath = "#{Dir.tmpdir}/#{params[:file][:filename]}"
  • ¶

    Open file

            File.open(filepath, 'wb') { |f| f.write(params[:file][:tempfile].read) }
  • ¶

    Make a request to API using client_id and private_key

            file = GroupDocs::Storage::File.upload!(filepath, {})
          when 'url'
            file = GroupDocs::Storage::File.upload_web!(settings.url)
          else
            raise 'Wrong GUID source.'
        end
    
        doc = file.to_document
        metadata = doc.metadata!()
  • ¶

    Get document page images

        images = doc.page_images!(800, 400, {:first_page => 0, :page_count => metadata.views_count})
  • ¶

    Result

        unless images.empty?
          image = images[Integer(settings.page_number)]
        end
    
      rescue Exception => e
        err = e.message
      end
  • ¶

    Set variables for template

      haml :sample08, :locals => {:clientId => settings.client_id, :privateKey => settings.private_key, :guid => settings.guid, :pageNumber => settings.page_number, :image => image, :err => err}
    end