Mutating request.base_url in Flask
Turns out request is a proxied object. I'm not sure of the internals but it's "reset" on each import. I solved the issue by subclassing Request
class ProxiedRequest(Request): def __init__(self, environ, populate_request=True, shallow=False): super(Request, self).__init__(environ, populate_request, shallow) # Support SSL termination. Mutate the host_url within Flask to use https:// # if the SSL was terminated. x_forwarded_proto = self.headers.get('X-Forwarded-Proto') if x_forwarded_proto == 'https': self.url = self.url.replace('http://', 'https://') self.host_url = self.host_url.replace('http://', 'https://') self.base_url = self.base_url.replace('http://', 'https://') self.url_root = self.url_root.replace('http://', 'https://')app = Flask(__name__);app.request_class = ProxiedRequest