boodebr sandbox: HelloWorld

Now its time to try our first bit of dynamic content. Here is the simplest possible "hello world" application. Note that this is a plain WSGI application - it neither knows no cares that it is running under AppEngine!

Create hello/hello.py:

# straight out of PEP 333 (http://www.python.org/dev/peps/pep-0333/)
def simple_app(environ, start_response):
    "Simplest possible application object"
    status = '200 OK'
    response_headers = [('Content-type','text/plain')]
    start_response(status, response_headers)
    return ['Hello from CGI Handler!\n']

# does not know nor care that it is running under AppEngine!
from wsgiref.handlers import CGIHandler
CGIHandler().run(simple_app)

Update app.yaml and add:

- url: /hello.*
script: hello/hello.py

Now try it out: http://boodebr.appspot.com/hello

Notice our simple application does not care what URL you pass to it, it always gives the sample result. For example: http://boodebr.appspot.com/hello/a/b/c?q=123&z=789