助力高校计算机教育 —— 码云为老师推出免费高校版,高达 200 人的协作团队
Watch Star Fork

一片天 / tornadoPython

加入码云
与超过 200 万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README.rst 4.38 KB

Tornado Web Server

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.

Quick links

Hello, world

Here is a simple "Hello, world" example web app for Tornado:

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

application = tornado.web.Application([
    (r"/", MainHandler),
])

if __name__ == "__main__":
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()

This example does not use any of Tornado's asynchronous features; for that see this simple chat room.

Installation

Automatic installation:

pip install tornado

Tornado is listed in PyPI and can be installed with pip or easy_install. Note that the source distribution includes demo applications that are not present when Tornado is installed in this way, so you may wish to download a copy of the source tarball as well.

Manual installation: Download the latest source from PyPI.

tar xvzf tornado-$VERSION.tar.gz
cd tornado-$VERSION
python setup.py build
sudo python setup.py install

The Tornado source code is hosted on GitHub.

Prerequisites: Tornado runs on Python 2.6, 2.7, 3.2, and 3.3. It has no strict dependencies outside the Python standard library, although some features may require one of the following libraries:

  • unittest2 is needed to run Tornado's test suite on Python 2.6 (it is unnecessary on more recent versions of Python)
  • concurrent.futures is the recommended thread pool for use with Tornado and enables the use of tornado.netutil.ThreadedResolver. It is needed only on Python 2; Python 3 includes this package in the standard library.
  • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.18.2 or higher is required; version 7.21.1 or higher is recommended.
  • Twisted may be used with the classes in tornado.platform.twisted.
  • pycares is an alternative non-blocking DNS resolver that can be used when threads are not appropriate.
  • Monotime adds support for a monotonic clock, which improves reliability in environments where clock adjustments are frequent. No longer needed in Python 3.3.

Platforms: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) are recommended (even though Mac OS X is derived from BSD and supports kqueue, its networking performance is generally poor so it is recommended only for development use).

Discussion and support

You can discuss Tornado on the Tornado developer mailing list, and report bugs on the GitHub issue tracker. Links to additional resources can be found on the Tornado wiki.

Tornado is one of Facebook's open source technologies. It is available under the Apache License, Version 2.0.

This web site and all documentation is licensed under Creative Commons 3.0.

项目点评 ( 0 )

你可以在登录后,发表评论

10_float_left_people 10_float_left_close