Quick'n'Dirty Tornado Intro
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Tornado is an asynchronous Python web framework that allows for non-blocking and scalable web applications. It uses asynchronous requests, has a simple database API without an ORM, and programmer-friendly templates. Tornado has proven successful in production at FriendFeed and is well-suited for real-time web services, popular dynamic sites, REST APIs, and non-CMS sites. The document provides an example of using Tornado to make an asynchronous Twitter API call and generate a Twitter badge.
![....
<style type="text/css">
.badge {
background: #{{profile_background_color}} url({{profile_background_image_url}});
... rest of wrapping and css left-out ...
<div class="badge">
<img class="badge-photo” src="{{ profile_image_url }}">
<div class="badge-title">{{ screen_name }}</div>
<div class="badge-description">{{ description }}</div>
<div class="clear"></div>
<div class="badge-status">{{ status['text'] }}</div>
</div>](https://image.slidesharecdn.com/pyconfipreso-101021073359-phpapp02/85/Quick-n-Dirty-Tornado-Intro-12-320.jpg)
Quick'n'Dirty Tornado Intro
- 1. quick’n’dirty TORNADO intro Teemu Kurppa www.dirtyaura.org/blog Twitter: teemu Huikea Experience Social mobile gaming startup www.huikea.com
- 3. TORNADO scalable, non-blocking web server
- 4. TORNADO asynchronous requests simple clean DB API, no ORM programmer-friendly templates readable codebase proven in production: FriendFeed
- 5. TORNADO Probably good for real-time web services (hanging GETs to poll) super-popular dynamic sites non-web REST services non-CMS sites for devs like me
- 6. Our Tornado instance app cheap, async call Twitter
- 7. Our Tornado instance db.slow_synchronous_query() cheap, async call ? Twitter
- 8. Our Tornado instance cheap, async calls Another Tornado instance Twitter db.slow_synchronous_query()
- 9. Programmer-friendly templates {% for index,value in entries.iteritems() %} {{ index }} : {{ value } {% end %} {% for value in entries %} {{ forloop.counter0 }} : {{ value }} {% endfor %}
- 10. CODE DEMO
- 11. class TwitterBadgeHandler(tornado.web.RequestHandler): @tornado.web.asynchronous def get(self, username): http = tornado.httpclient.AsyncHTTPClient() url = "http://api.twitter.com/1/users/show/%s.json" % username http.fetch(url, callback=self.on_response) def on_response(self, response): if response.error: self.render("badge_error.html") else: user = tornado.escape.json_decode(response.body) self.render("twitter_badge.html", **user)
- 12. .... <style type="text/css"> .badge { background: #{{profile_background_color}} url({{profile_background_image_url}}); ... rest of wrapping and css left-out ... <div class="badge"> <img class="badge-photo” src="{{ profile_image_url }}"> <div class="badge-title">{{ screen_name }}</div> <div class="badge-description">{{ description }}</div> <div class="clear"></div> <div class="badge-status">{{ status['text'] }}</div> </div>