Class: Wovnrb::Interceptor

Inherits:
Object
  • Object
show all
Defined in:
lib/wovnrb.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, opts = {}) ⇒ Interceptor

Returns a new instance of Interceptor.



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# File 'lib/wovnrb.rb', line 22

def initialize(app, opts={})
  @app = app
  @store = Store.instance
  opts = opts.each_with_object({}){|(k,v),memo| memo[k.to_s]=v}
  @store.settings(opts)
  CacheBase.set_single(@store.settings)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/wovnrb.rb', line 30

def call(env)
  @store.settings.clear_dynamic_settings!
  unless Store.instance.valid_settings?
    return @app.call(env)
  end
  @env = env
  headers = Headers.new(env, @store.settings)
  if @store.settings['test_mode'] && @store.settings['test_url'] != headers.url
    return @app.call(env)
  end
  #redirect if the path is set to the default language (for SEO purposes)
  if (headers.path_lang == @store.settings['default_lang'])
    redirect_headers = headers.redirect(@store.settings['default_lang'])
    return [307, redirect_headers, ['']]
  end
  lang = headers.lang_code

  # pass to application
  status, res_headers, body = @app.call(headers.request_out)

  unless res_headers["Content-Type"] =~ /html/
    return output(headers, status, res_headers, body)
  end

  request = Rack::Request.new(env)

  if request.params['wovn_disable'] == true
    return output(headers, status, res_headers, body)
  end

  @store.settings.update_dynamic_settings!(request.params)
  if @store.settings['ignore_globs'].any?{|g| g.match?(headers.pathname)}
    return output(headers, status, res_headers, body)
  end

  # ApiData creates request for external server, but cannot use async.
  # Because some server not allow multi thread. (env['async.callback'] is not supported at all Server).
  api_data = ApiData.new(headers.redis_url, @store)
  values = api_data.get_data

  url = {
    :protocol => headers.protocol,
    :host => headers.host,
    :pathname => headers.pathname
  }
  body = switch_lang(body, values, url, lang, headers) unless status.to_s =~ /^1|302/

  content_length = 0
  body.each { |b| content_length += b.respond_to?(:bytesize) ? b.bytesize : 0 }
  res_headers["Content-Length"] = content_length.to_s

  output(headers, status, res_headers, body)
end

#switch_lang(body, values, url, lang = , headers) ⇒ Object 



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# File 'lib/wovnrb.rb', line 84

def switch_lang(body, values, url, lang=@store.settings['default_lang'], headers)
  lang = Lang.new(lang)
  ignore_all = false
  new_body = []

  # generate full_body to intercept
  full_body = ''
  body.each { |b| full_body += b }

  [full_body].each do |b|
    # temporarily remove noscripts
    noscripts = []
    b_without_noscripts = b
    b.scan /<noscript.*?>.*?<\/noscript>/m do |match|
      noscript_identifier = "<noscript wovn-id=\"#{noscripts.count}\"></noscript>"
      noscripts << match
      b_without_noscripts = b_without_noscripts.sub(match, noscript_identifier)
    end
    d = Nokogiri::HTML5(b_without_noscripts)
    d.encoding = "UTF-8"

    # If this page has wovn-ignore in the html tag, don't do anything
    if ignore_all || !d.xpath('//html[@wovn-ignore]').empty? || is_amp_page?(d)
      ignore_all = true
      output = d.to_html.gsub(/href="([^"]*)"/) { |m| "href=\"#{URI.decode($1)}\"" }
      put_back_noscripts!(output, noscripts)
      new_body.push(output)
      next
    end

    if have_data?(values)
      output = lang.switch_dom_lang(d, @store, values, url, headers)
    else
      ScriptReplacer.new(@store).replace(d, lang)
      output = d.to_html
    end
    put_back_noscripts!(output, noscripts)
    new_body.push(output)
  end
  body.close if body.respond_to?(:close)
  new_body
end