Webapp2 Headers

webapp2_headers

"""
Sometimes you need to forcefully set headers in Webapp2 while using Google App Engine (GAE).
It is NOT RECOMMENDED to use `*` for `Access-Control-Allow-Origin` as below. I've put it 
there simply for the sake of demonstration. Make sure you choose something more restrictive.
"""

def initialize_headers(headers, http_verb):
    """Set up the headers for HTTP requests"""

    headers['Access-Control-Allow-Origin'] = '*'
    headers['Access-Control-Allow-Methods'] = http_verb 
    headers['Access-Control-Allow-Headers'] = 'Origin, X-Requested-With, Content-Type, Accept'
    headers['Content-Type'] = 'text/plain'

    return headers


class HandleOptions(webapp2.RequestHandler):
    def options(self):
        """GET /: Retrieve all todos"""

        self.response.headers = initialize_headers(self.response.headers, 'OPTIONS')