Slides de la charla en GTUG Buenos Aires acerca de el Google App Engine con Python

1. Sebastián Serrano [email_address] twitter: sserrano44 http://www.lp-gtug.org Google App Engine + Python en 5 minutos

2. Cloud Computing??

3. 0% Administracion = 100% Desarrollo

5. Servicios del App Engine

6. Lenguajes

8. App Engine Dashboard

9. SDK Console

11. Arrancar un proyecto $ dev_appserver.py helloworld # run dev svr $ appcfg.py update helloworld # deploy live Linux, MacOS, etc. command-line: Windows GUI (y Mac):

12. Contenido basico app.yaml – archivo configuración main principal index.yaml – generado automáticamente para indexar nuestros datos main.py – el código de la aplicación

13. main.py

14. Local development server $ dev_appserver.py helloworld INFO 2009-03-04 17:51:22,354 __init__.py]

16. Modifying app.yaml application: helloworld version: 1 runtime: python api_version: 1 handlers: - url: .* script: main.py

17. Running the deploy script $ appcfg.py update helloworld Scanning files on local disk. Initiating update. Email: ...

18. You're live!

19. Demo time??

20. main.py: Skeleton application from google.appengine.ext import webapp from google.appengine.ext.webapp import util class MainHandler(webapp.RequestHandler): def get(self): self.response.out.write('Hello world!') def main(): application = webapp.WSGIApplication([('/', MainHandler)], debug=True) util.run_wsgi_app(application) if __name__ == '__main__': main()

21. main.py: Adding a handler from google.appengine.ext import webapp from google.appengine.ext.webapp.util import run_wsgi_app class MainHandler(webapp.RequestHandler): def get(self): self.response.out.write('<h1>Hello world!</h1>') self.response.out.write(''' <form action=&quot;/sign&quot; method=post> <input type=text name=content> <br><input type=submit value=&quot;Sign Guestbook&quot;> </form> ''') class GuestBook(webapp.RequestHandler): def post(self): self.response.out.write( '<h2>You wrote:</h2> %s' % self.request.get('content') ) application = webapp.WSGIApplication([ ('/', MainHandler), ('/sign', GuestBook), ], debug=True) # start_wsgi_app etc ...

22. main.py: Persisting to the datastore class GuestBook(webapp.RequestHandler): def post(self): greeting = Greeting() greeting.content = self.request.get('content') greeting.put() self.redirect('/')

23. main.py: Collecting values from the datastore class MainHandler(webapp.RequestHandler): def get(self): self.response.out.write('Hello world!') self.response.out.write('<h1>My GuestBook</h1><ol>') greetings = Greeting.all() for greeting in greetings: self.response.out.write('<li> %s' % greeting.content) self.response.out.write(''' </ol><hr> <form action=&quot;/sign&quot; method=post> <textarea name=content rows=3 cols=60></textarea> <br><input type=submit value=&quot;Sign Guestbook&quot;> </form> ''')

24. Live demo??