Building RESTful Python Web Services

Mapping URL patterns to request handlers

We must map URL patterns to our previously coded subclasses of tornado.web.RequestHandler. The following lines create the main entry point for the application, initialize it with the URL patterns for the API, and starts listening for requests. Open the previously created api.py file and add the following lines. The code file for the sample is included in the restful_python_chapter_09_01 folder:

application = web.Application([ 
    (r"/hexacopters/([0-9]+)", HexacopterHandler), 
    (r"/leds/([0-9]+)", LedHandler), 
    (r"/altimeters/([0-9]+)", AltimeterHandler), 
], debug=True) 
 
 
if __name__ == "__main__": 
    port = 8888 
    print("Listening at port {0}".format(port)) 
    application.listen(port) 
    ioloop.IOLoop.instance().start()