Application Servers

Twisted – networking engine written in Python, supporting numerous protocols

Twisted is an event-driven networking engine.

Twisted is designed for complete separation between logical protocols (usually relying on stream-based connection semantics, such as HTTP or POP3) and physical transport layers supporting such stream-based semantics (such as files, sockets or SSL libraries).

This is free and open source software.

Key Features

  • Includes modules for many different purposes, including the following:
    • twisted.web: HTTP clients and servers, HTML templating, and a WSGI server
    • twisted.conch: SSHv2 and Telnet clients and servers and terminal emulators
    • twisted.words: Clients and servers for IRC, XMPP, and other IM protocols
    • twisted.mail: IMAPv4, POP3, SMTP clients and servers
    • twisted.positioning: Tools for communicating with NMEA-compatible GPS receivers
    • twisted.names: DNS client and tools for making your own DNS servers
    • twisted.trial: A unit testing framework that integrates well with Twisted-based code.
  • Supports all major system event loops — select (all platforms), poll (most POSIX platforms), epoll (Linux), kqueue (FreeBSD, macOS), IOCP (Windows), and various GUI event loops (GTK+2/3, Qt, wxWidgets).
  • Supports TCP, UDP, SSL/TLS, IP multicast, Unix domain sockets, many protocols (including HTTP, XMPP, NNTP, IMAP, SSH, IRC, FTP, and others), and much more.
  • Third-party reactors can plug into Twisted, and provide support for additional event loops.

Website: twisted.org
Support: GitHub Code Repository
Developer: Twisted Team
License: MIT License

Twisted is written in Python. Learn Python with our recommended free books and free tutorials.


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Read our verdict in the software roundup.


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