Event-Driven Programming with Twisted and Python
You can download for tinkering all 606 lines of the proxy server discussed in this article. Although I wouldn't put the company intranet behind it, I've been using it for a week now to filter out unwanted cookies and images and even to block access to a certain vendor from my desktop. When I started using Twisted, it was easy to wrap my head around the concept of asynchronous programming, a little harder to figure out how to map events to the flow I wanted and harder still to explain it to someone else. Do not be discouraged, however. Although we at Zoto started with almost no Twisted knowledge, we've built a fully functional and extremely scalable clustered application to store and manage on-line photos in less than a year, with only one person (me) working full-time on the server.
Of course, Twisted is not for everyone. Its vastness, although powerful, can be intimidating. For a simple asynchronous chat server in Python, take a look at Medusa. Like Twisted, Medusa organizes asynchronous programming into Factories (called Dispatchers) and chatting classes.
Resources for this article: www.linuxjournal.com/article/7963.
Ken Kinder is currently developing a clustered Twisted server for Zoto in Oklahoma City, Oklahoma. He enjoys hiking, skiing, photography and (of course) Linux. His hometown is Boulder, Colorado.
Webinar: 8 Signs You’re Beyond Cron
On Demand NOW
Join Linux Journal and Pat Cameron, Director of Automation Technology at HelpSystems, as they discuss the eight primary advantages of moving beyond cron job scheduling. In this webinar, you’ll learn about integrating cron with an enterprise scheduler.View Now!
|New Linux Based OS Brings Internet of Things Closer to Reality||May 27, 2015|
|Non-Linux FOSS: All the Bitcoin, None of the Bloat||May 26, 2015|
|Dr Hjkl on the Command Line||May 21, 2015|
|Initializing and Managing Services in Linux: Past, Present and Future||May 20, 2015|
|Goodbye, Pi. Hello, C.H.I.P.||May 18, 2015|
|Using Hiera with Puppet||May 14, 2015|
- New Linux Based OS Brings Internet of Things Closer to Reality
- Dr Hjkl on the Command Line
- Initializing and Managing Services in Linux: Past, Present and Future
- Non-Linux FOSS: All the Bitcoin, None of the Bloat
- Using Hiera with Puppet
- Goodbye, Pi. Hello, C.H.I.P.
- Infinite BusyBox with systemd
- Gartner Dubs DivvyCloud Cool Cloud Management Vendor
- It's Easier to Ask Forgiveness...
- Urgent Kernel Patch for Ubuntu