old_contents: from jinja2 import Markup
  from flask import current_app, request
  
  class _pagedown(object):
      def include_pagedown(self):
          if request.is_secure:
              protocol = 'https'
          else:
              protocol = 'http'
          return Markup('''
  <script type="text/javascript" src="{0}://cdnjs.cloudflare.com/ajax/libs/pagedown/1.0/Markdown.Converter.min.js"></script>
  <script type="text/javascript" src="{0}://cdnjs.cloudflare.com/ajax/libs/pagedown/1.0/Markdown.Sanitizer.min.js"></script>
  '''.format(protocol))
  
      def html_head(self):
          return self.include_pagedown()
  
  class PageDown(object):
      def __init__(self, app = None):
          if app is not None:
              self.init_app(app)
  
      def init_app(self, app):
          if not hasattr(app, 'extensions'):
              app.extensions = {}
          app.extensions['pagedown'] = _pagedown()
          app.context_processor(self.context_processor)
  
      @staticmethod
      def context_processor():
          return {
              'pagedown': current_app.extensions['pagedown']
          }
  
  
new_contents: from jinja2 import Markup
  from flask import current_app, request
  
  class _pagedown(object):
      def include_pagedown(self):
          return Markup('''
  <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/pagedown/1.0/Markdown.Converter.min.js"></script>
  <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/pagedown/1.0/Markdown.Sanitizer.min.js"></script>
  ''')
  
      def html_head(self):
          return self.include_pagedown()
  
  class PageDown(object):
      def __init__(self, app = None):
          if app is not None:
              self.init_app(app)
  
      def init_app(self, app):
          if not hasattr(app, 'extensions'):
              app.extensions = {}
          app.extensions['pagedown'] = _pagedown()
          app.context_processor(self.context_processor)
  
      @staticmethod
      def context_processor():
          return {
              'pagedown': current_app.extensions['pagedown']
          }
  
  
subject: Fix support for SSL for proxied sites, or otherwise uncertain situations