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Editorial Team
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Asked: 2026-06-14T10:33:00+00:00

Attempting to develop a python web service on the Google App Engine that will

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Attempting to develop a python web service on the Google App Engine that will handle data posted from an HTML form. Can someone please advise what I’m doing wrong? All files residing in the same directory on the desktop \helloworld.

OS: Win 7 x64
Python 2.7
Google App Engine (Local)

helloworld.py

import webapp2
import logging
import cgi

class MainPage(webapp2.RequestHandler):

  def post(self):
    self.response.headers['Content-Type'] = 'text/plain'
    form = cgi.FieldStorage()
    if "name" not in form:
      self.response.write('Name not in form')
    else:
      self.response.write(form["name"].value)

app = webapp2.WSGIApplication([('/', MainPage)],debug=False)

page.html

<html>
<body>
  <form action="http://localhost:8080" method="post">
    Name: <input type="text" name="name"/>
    <input type="submit" value="Submit"/>
  </form>
</body>
</html>

Using a browser (Chrome) viewing the page.html, I input a text into the field and press submit, I expect to see the text being displayed in the browser, but I get “Name not in form”. It works if I change the HTML form method to get and the python function to def get(self), but I would like to use the post method. Any help with explanation would be appreciated.

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1 Answer

  1. Editorial Team

    You shouldn’t be using cgi.FieldStorage. Webapp2, like all web frameworks, has a built-in way of handling POST data: in this case, it’s through request.POST. So your code should just be:

    if "name" not in self.request.POST:
    self.response.write('Name not in form')
else:
    self.response.write(self.request.POST["name"])

    See the webapp2 documentation.

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