sockets - python3 上的 Tornado

Question

我的目标是使用 tornado ( http://www.tornadoweb.org/ ) 在 python3 上运行 http 服务器。我从运行示例开始 code在他们的网页上找到:

import tornado.httpserver
import tornado.ioloop

from tornado import httputil

def handle_request(request):
   message = "You requested %s\n" % request.uri
   request.connection.write_headers(
       httputil.ResponseStartLine('HTTP/1.1', 200, 'OK'),
       {"Content-Length": str(len(message))})
   request.connection.write(message)
   request.connection.finish()


http_server = tornado.httpserver.HTTPServer(handle_request)
http_server.listen(8080)
tornado.ioloop.IOLoop.instance().start()

此代码在接收到任何 http 请求时抛出以下异常:

    ERROR:tornado.application:Uncaught exception
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/tornado/http1connection.py", line 234, in _read_message
    delegate.finish()
  File "/usr/local/lib/python3.4/dist-packages/tornado/httpserver.py", line 280, in finish
    self.server.request_callback(self.request)
  File "test.py", line 10, in handle_request
    {"Content-Length": str(len(message))})
  File "/usr/local/lib/python3.4/dist-packages/tornado/http1connection.py", line 367, in write_headers
    lines.extend([utf8(n) + b": " + utf8(v) for n, v in headers.get_all()])
AttributeError: 'dict' object has no attribute 'get_all'

怎么了？这是示例代码，所以它应该可以工作，问题出在我的环境中？我在最新的 Ubuntu 和 Win 7 上都试过了，它给了我同样的错误。

提前致谢

Answer 1

文档有一个错误，fixed recently .对于 任何 版本的 Python，您不能将原始字典传递给 write_headers。相反，您必须将字典包装在 HTTPHeaders 对象中。对于 Python 3，消息必须是字节实例。有了这两个修复:

def handle_request(request):
   message = ("You requested %s\n" % request.uri).encode('ascii')
   request.connection.write_headers(
       httputil.ResponseStartLine('HTTP/1.1', 200, 'OK'),
       httputil.HTTPHeaders({"Content-Length": str(len(message))}))
   request.connection.write(message)
   request.connection.finish()