Files for the Getting Started with Google App Engine for the Google Cloud Platform Next Extended 2016 Ibadan event delivered by Hamza Fetuga (hfetuga@gmail.com)

app.yaml

runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: /.*
  script: helloworld.app

app_fizzbuzz.yaml

runtime: python27
api_version: 1
threadsafe: yes

handlers:

- url: /.*
  script: gcp_next.app

libraries:
- name: webapp2
  version: "2.5.2"
  
- name: jinja2
  version: latest

Deploy to live server

gcloud preview app deploy app.yaml 

fizzbuzz.html

<form action="/fizzbuzz">
  Enter n:<br>
  <input type="text" name="n" value="" id="n"><br>
  <input type="submit" value="Submit">
</form>

<ol>    
    {% for a in range(1, n + 1) %}
    {% if a % 3 == 0 and a % 5 == 0 %}
    <li>FizzBuzz</li>
    {% elif a % 3 == 0 %}
    <li>Fizz</li>
    {% elif a % 5 == 0 %}
    <li>Buzz</li>
    {% else %}
    <li>{{a}}</li>
    {% endif %}
    {% endfor %}
</ol>

gcp_next.py

import webapp2
import jinja2
import os


jinja_env = jinja2.Environment(
    loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
    extensions=['jinja2.ext.autoescape'],
    autoescape=True)

form = """<a href="/fizzbuzz">FizzBuzz</a>"""

class MainPage(webapp2.RequestHandler):
    def get(self):
        #self.response.headers['Content-Type'] = 'text/plain'
        self.response.write(form)
        
class Handler(webapp2.RequestHandler):
    def write(self, *a, **kw):
        self.response.out.write(*a, **kw)
        
    def render_str(self, template, **params):
        t = jinja_env.get_template(template)
        return t.render(params)
        
    def render(self, template, **kw):
        self.write(self.render_str(template, **kw))

class FizzBuzzHandler(Handler):
    def get(self):
        n = self.request.get('n', 0)
        n = n and int(n)
        self.render("fizzbuzz.html", n = n)


app = webapp2.WSGIApplication([
    ('/', MainPage), ('/fizzbuzz', FizzBuzzHandler)
], debug=True)

helloworld.py

import webapp2

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

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

Start development server

dev_appserver.py ./

To create a file and add content

cat > filename

Then you paste the content

Then use Ctrl + D to save and exit

To create a file without content

touch filename

to edit a file

vim filename

Press a to start editing

Do your editing

When you're done, press Esc
Then type ":wq" to write/save and quit/exit

To view content of a file only

cat filename