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Tornado

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Cristian Andreica
Cristian Andreica

This document provides an overview of the Real Time Web Server Tornado. Tornado is an open-source, non-blocking web server that allows for thousands of simultaneous active connections using epoll callbacks on the kernel file structure. It enables building real-time web services through features like push technologies via long polling. The document includes code snippets demonstrating URL mapping, handling POST arguments, using HTML templates, and making asynchronous requests in Tornado. It also discusses modules, widgets, and references for further reading.

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Real Time Web Server
Real Time, so what?Tornado – The baby that comes with it1000s simultaneously active connections
Open-source (Apache 2.0 License)NginxNon-blocking web serverEpoll (callbacks on the kernel file structure)Push vs Pull (long polling)Real-time web services
- Module List
- Code SnippetsURL Mapping (get + post)class MainHandler(tornado.web.RequestHandler): def get(self): self.write("You requested the main page") class StoryHandler(tornado.web.RequestHandler): def get(self, story_id): self.write("You requested the story " + story_id) application = tornado.web.Application([ (r"/", MainHandler), (r"/story/([0-9]+)", StoryHandler), ])Post arguments class MainHandler(tornado.web.RequestHandler): def get(self): self.write('<html><body><form action="/" method="post">' '<input type="text" name="message">' '<input type="submit" value="Submit">' '</form></body></html>') def post(self): self.set_header("Content-Type", "text/plain") self.write("You wrote " + self.get_argument("message"))HTTPRequest
- Code SnippetsHTML Templates<html> <head> <title>{{ title }}</title> </head> <body> <ul> {% for item in items %} <li>{{ escape(item) }}</li> {% end %} </ul> </body> </html>Template Handlerclass MainHandler(tornado.web.RequestHandler): def get(self): Items = ["Item 1", "Item 2", "Item 3"] self.render("template.html", title="My title", items=items)
- UI ModulesWidget HTML, CSS
JavaScript
MySQLBlog Post 1WidgetmyModule.pyBlog Post 2WidgetWeb Page<short python code here…>
- Asynchronous Requests1. Fetch datawww.website.comPicasa/Flickr2. Response (callback)Synchronous Requests immediate server response

More Related Content

Tornado

  • 2. Real Time, so what?Tornado – The baby that comes with it1000s simultaneously active connections
  • 3. Open-source (Apache 2.0 License)NginxNon-blocking web serverEpoll (callbacks on the kernel file structure)Push vs Pull (long polling)Real-time web services
  • 5. - Code SnippetsURL Mapping (get + post)class MainHandler(tornado.web.RequestHandler): def get(self): self.write("You requested the main page") class StoryHandler(tornado.web.RequestHandler): def get(self, story_id): self.write("You requested the story " + story_id) application = tornado.web.Application([ (r"/", MainHandler), (r"/story/([0-9]+)", StoryHandler), ])Post arguments class MainHandler(tornado.web.RequestHandler): def get(self): self.write('<html><body><form action="/" method="post">' '<input type="text" name="message">' '<input type="submit" value="Submit">' '</form></body></html>') def post(self): self.set_header("Content-Type", "text/plain") self.write("You wrote " + self.get_argument("message"))HTTPRequest
  • 6. - Code SnippetsHTML Templates<html> <head> <title>{{ title }}</title> </head> <body> <ul> {% for item in items %} <li>{{ escape(item) }}</li> {% end %} </ul> </body> </html>Template Handlerclass MainHandler(tornado.web.RequestHandler): def get(self): Items = ["Item 1", "Item 2", "Item 3"] self.render("template.html", title="My title", items=items)
  • 9. MySQLBlog Post 1WidgetmyModule.pyBlog Post 2WidgetWeb Page<short python code here…>
  • 10. - Asynchronous Requests1. Fetch datawww.website.comPicasa/Flickr2. Response (callback)Synchronous Requests immediate server response
  • 11. cannot later-update the clientAsynchronous Requests immediate server response
  • 12. allows for 3rd party services
  • 13. push technologies- ReferencesNon-blockingLong-pollingWeb ServerCSRF ProtectionAsynchronousSigned CookiesmodularTornado - http://www.tornadoweb.org/Epoll man page - http://linux.die.net/man/4/epollLong Pooling - http://en.wikipedia.org/wiki/Push_technologyCSRF - http://en.wikipedia.org/wiki/Cross-site_request_forgeryHack it now…Q/A minute
  • 14. Cristian Andreica331 CBcristian.andreica@gmail.com : @acristianhttp://www.slideshare.net/cristianAndreica/tornadoThank YOU!

Editor's Notes

  1. - Facebook Tornado (ce este tornado, structura de ansamblu a modulelor, care sunt beneficiile, cum se utilizeaza)- Rata de adoptie pe web a tehnologiilor (weekend sized-problem)
  2. Cati au cont pe faceboook?Stie cineva ce e friendfeed?La ce foloseste?Acquisition price, value baby (Tornado)
  3. - Ce e tornado in esenta?blocking vs non-blocking- Select O(n) , epoll O(1)- Real time web services: search, news, contacts