新闻 Tornado 4.5.3 发布，Python Web 框架和异步网络库 下载

Tornado 是使用 Python 开发的全栈式（full-stack）Web 框架和异步网络库，最早由 Friendfeed 开发。通过使用非阻塞 IO，Tornado 可以处理数以万计的开放连接，是 long polling、WebSockets 和其他需要为用户维护长连接应用的理想选择。

Tornado 4.5.3 已发布，更新如下：

tornado.curl_httpclient

• 
  Improved debug logging on Python 3.
  

tornado.httpserver

• 
  Content-Length and Transfer-Encoding headers are no longer sent with 1xx or 204 responses (this was already true of 304 responses).
  
  
• 
  Reading chunked requests no longer leaves the connection in a broken state.
  

tornado.iostream

• 
  Writing a memoryview can no longer result in "BufferError: Existing exports of data: object cannot be re-sized".
  

tornado.options

• 
  Duplicate option names are now detected properly whether they use hyphens or underscores.
  

tornado.testing

• 
  .AsyncHTTPTestCase.fetch now uses 127.0.0.1 instead of localhost, improving compatibility with systems that have partially-working ipv6 stacks.
  

tornado.web

• 
  It is no longer allowed to send a body with 1xx or 204 responses.
  

tornado.websocket

• 
  Requests with invalid websocket headers now get a response with status code 400 instead of a closed connection.
  

下载地址：

• 
  Source code (zip)
  
  
• 
  Source code (tar.gz)
  

Tornado 4.5.3 发布，Python Web 框架和异步网络库下载地址