convert fb2 to html

gistfile1.rb

module ConvertingTool
  extend ActiveSupport::Concern

  def self.convert(file_path)

    # TODO: make schema file cache
    schema_path = Rails.root.join('data', 'schemes', 'FB2_2_html.xsl')

    require 'nokogiri'

    begin
      # converting
      doc = Nokogiri::XML(File.read file_path)
      xslt = Nokogiri::XSLT(File.read schema_path)
      html = xslt.transform(doc)

      # remove invalid parts
      html = html.to_s.gsub(/l:href/, 'href').gsub(/ xmlns(:\w+)*="[^\"]+"/, '')
    rescue Exception => e
      Rails.logger.debug "Error while converting fb2 to html::  #{e}"
      return nil
    end
    html
  end

end