title: 'Request' object has no attribute 'get_json' Werkzeug
body: <p>I am unable to print out or read json data from my request.
  The POST request is application/json and the json sent is valid.
  Any idea why 'get_json' doesn't exist?</p>
  <pre class="lang-py prettyprint-override"><code>from werkzeug.wrappers import Request, Response
  import json
  
  @Request.application
  def application(request):
      data = request.get_json(force=True)
      print(data)
      return Response('Data Received')
  
  if __name__ == '__main__':
      from werkzeug.serving import run_simple
      run_simple('localhost', 5000, application)
  </code></pre>
  <p>Replacing <code>request.get_json</code> with <code>request.get_data</code> returns the json as a string (<code>d'{\n&quot;example&quot;: &quot;here&quot;\n}'</code>)</p>
  <p>I've confirmed my Werkzeug installation is up-to-date.</p>