Call Python from jQuery in Google App Engine platform

Question

UPDATED: Changed to simpler python script

I have a website hosted in Google App Engine which is mostly static. Now I have a python script that would return a list of files under a specific folder in the server. I need this list of files in JavaScript.

helloworld.py

import webapp2

class MainPage(webapp2.RequestHandler):
    def get(self):
        self.response.headers['Content-Type'] = 'text/plain'
        self.response.write('Hello, webapp2 World!')
app = webapp2.WSGIApplication([('/GetImages', MainPage)], debug=True)

I am calling this Python script in a <script> tag in my index.html using jQuery

$.ajax({
    type: "GET",
    url: "/GetImages",
    dataType: "text",
    success: function(data) {
        alert(data);
    }
});

In my app.yaml I have this handler defined and also other handlers for static files

- url: /GetImages
  script: helloworld.app

I have started Google App Engine launcher, and when I open my site in localhost:8080/GetImages, I don't see the hello world string.

I think the problem is with my app.yaml. If I add below in the handlers, I get server error. Is this not allowed?

- url: /static
  static_dir: static

Accessing localhost:8080/GetImages with your browser should show you the result of the request. — leo
– leo, Commented Nov 25, 2012 at 22:04
@leo That gives me a server error. HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request. — John Ng
– John Ng, Commented Nov 25, 2012 at 22:08
If you can't access /GetImages, chances are good your javascript can't either. You'll need to figure out why that URL isn't working and then you can proceed down the line of debugging your JS. — imjared
– imjared, Commented Nov 25, 2012 at 22:10
maybe someone can help me with whatever the problem is with my setup? — John Ng
– John Ng, Commented Nov 25, 2012 at 22:14
Are you sure it's your setup? Try returning a simple message and see if it works. If it does, then chances are your function is wrong (..\images doesn't exist, for example). BTW: are you sure ..\images is the way to reference the images folder??? Why BACKSLASH? — leo
– leo, Commented Nov 25, 2012 at 22:28

John Ng · Accepted Answer · 2012-11-25 22:48:29Z

0

Fixed it. The problem was some incorrect indent in the python script. Stupid mistake :)

answered Nov 25, 2012 at 22:48

John Ng

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