Python Tornado – Asynchronous Networking
- HTTP Server Example
- Asynchronous HTTP Client Example
HTTP Server Example
This example demonstrates how to create a basic HTTP server using Tornado. By leveraging Tornado’s asynchronous capabilities, the server can handle multiple concurrent requests without blocking.
import tornado.ioloop
import tornado.web
class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Hello, Tornado!")
def make_app():
return tornado.web.Application([
(r"/", MainHandler),
])
if __name__ == "__main__":
app = make_app()
app.listen(8888)
tornado.ioloop.IOLoop.current().start()
Output
Asynchronous HTTP Client Example
Here, we define an asynchronous HTTP client using Tornado. The fetch_url function asynchronously retrieves the contents of a given URL without blocking the event loop, allowing for efficient handling of multiple requests.
import tornado.ioloop
import tornado.httpclient
async def fetch_url(url):
http_client = tornado.httpclient.AsyncHTTPClient()
response = await http_client.fetch(url)
print(response.body)
if __name__ == "__main__":
tornado.ioloop.IOLoop.current().run_sync(
lambda: fetch_url("https://example.com"))
Output:
<!doctype html>
<html>
<head>
<title>Example Domain</title>
<meta charset="utf-8" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style type="text/css">
body {
background-color: #f0f0f2;
margin: 0;
padding: 0;
font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
div {
width: 600px;
margin: 5em auto;
padding: 2em;
background-color: #fdfdff;
border-radius: 0.5em;
box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
}
a:link, a:visited {
color: #38488f;
text-decoration: none;
}
@media (max-width: 700px) {
div {
margin: 0 auto;
width: auto;
}
}
</style>
</head>
<body>
<div>
<h1>Example Domain</h1>
<p>This domain is for use in illustrative examples in documents. You may use this
domain in literature without prior coordination or asking for permission.</p>
<p><a href="https://www.iana.org/domains/example">More information...</a></p>
</div>
</body>
</html>
Python Tornado – Asynchronous Networking
Traditional synchronous networking models often struggle to keep pace with the demands of modern applications. Enter Tornado-Asynchronous networking, a paradigm-shifting approach that leverages non-blocking I/O to create lightning-fast, highly scalable network applications. In this article, we will learn about Python Tornado – asynchronous networking.
What is Python Tornado – Asynchronous Networking?
Tornado is a Python web framework and asynchronous networking library that has gained significant popularity due to its ability to handle thousands of simultaneous connections with ease. At its core, Tornado utilizes an event-driven architecture, allowing it to handle I/O operations asynchronously without the need for multithreading.
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