How to redirect all URLs with Google App Engine

Webapp2 has a built-in redirect handler

No need to roll your own handler; webapp2 already comes with one.

application = webapp2.WSGIApplication([
    webapp2.Route('/hello', webapp2.RedirectHandler, defaults={'_uri':'http://domain.com'}),
    webapp2.Route('/hello28928723', webapp2.RedirectHandler, defaults={'_uri':'http://domain.com'}),
], debug=False)

The _uri argument is what the RedirectHandler class uses to define the destination. It took a lot of Google Fu to find the documentation on this but it works flawlessly in my app.

Update:

I assumed you're aware of this but you need to change your catch-all route from:

- url: /
  static_dir: static

To (python27 version):

- url: /.*
  script: main.application

Or: (pre python27 version)

- url: /.*
  script: main.py

main.py is the file containing the request handler + routes.

Note: There is no static-only way to handle redirects on GAE because of the nature of static files. Basically, there's no way to do a redirect in app.yaml alone.

All you need (replace app-id, http://example.com):

• app.yaml:

  application: app-id
  version: 1
  runtime: python27
  api_version: 1
  threadsafe: false
  
  handlers:
  - url: /.*
    script: main.py
  

• main.py:

  from google.appengine.ext import webapp
  from google.appengine.ext.webapp.util import run_wsgi_app
  
  class AllHandler(webapp.RequestHandler):
      def get(self):
          self.redirect("http://example.com", True)
  
  application = webapp.WSGIApplication([('/.*', AllHandler)])
  
  def main():
      run_wsgi_app(application)
  
  if __name__ == "__main__":
      main()
  

you can redirect all requests easily with a python handler. Something like

class FormHandler(webapp.RequestHandler):
  def post(self):
    if processFormData(self.request):
      self.redirect("http://domain.com")