Question

决定今晚我会踢Tornado 2.0的轮胎，但它似乎已经在我的ASyncHTTPClient上做了一个数字。 2.0的发行说明中没有任何内容表明我对如何使用ASyncHTTPClient进行任何实际更改：

[编辑：让代码更像是一个明确的，自包含的例子]

import time
import threading
import functools

import tornado.ioloop
import tornado.web
from tornado.httpclient import *

class MainHandler(tornado.web.RequestHandler):

    def perform_task(self,finish_function):
      http_client = AsyncHTTPClient()
      tornado.ioloop.IOLoop.instance().add_callback(finish_function)
      # do something
      for i in range(0,10):
        print i
        time.sleep(1)
      request = tornado.httpclient.HTTPRequest("http://10.0.1.5:8888",method="POST",body="finished countdown")
      resp = http_client.fetch(request, self.handle_request)
      return

    def join_callback(self):
      # finish the request, also returns control back to ioloop's thread.
      self.finish()

    def handle_request(self, response):
      if response.error:
          print "Error:", response.error
      else:
          print response.body

    @tornado.web.asynchronous
    def get(self):
        self.write("Kicking off.")
        a_partial = functools.partial(self.perform_task,self.join_callback)
        self.thread = threading.Thread(target=a_partial)
        self.thread.start()
        self.write("\n<br/>Done in here, out of my hands now.")

    # just so this example has something to post to
    @tornado.web.asynchronous
    def post(self):
        self.write("POSTED: %s" % (self.request.body))

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

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

使用默认（非卷曲）ASyncHTTPClient时，我得到以下内容：

Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/tornado/simple_httpclient.py", line 259, in cleanup
    yield
  File "/usr/local/lib/python2.6/dist-packages/tornado/simple_httpclient.py", line 186, in __init__
    functools.partial(self._on_connect, parsed))
  File "/usr/local/lib/python2.6/dist-packages/tornado/iostream.py", line 120, in connect
    self.socket.connect(address)
AttributeError: 'NoneType' object has no attribute 'connect'

如果我加入： tornado.httpclient.AsyncHTTPClient.configure（ “tornado.curl_httpclient.CurlAsyncHTTPClient”）

指定我想使用PyCurl，我得到以下异常：

   Traceback (most recent call last):
      File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
        self.run()
      File "/usr/lib/python2.6/threading.py", line 484, in run
        self.__target(*self.__args, **self.__kwargs)
      File "migratotron.py", line 46, in perform_migration
        hc.fetch(request,success)
      File "/usr/local/lib/python2.6/dist-packages/tornado/curl_httpclient.py", line 81, in fetch
        self._process_queue()
      File "/usr/local/lib/python2.6/dist-packages/tornado/curl_httpclient.py", line 210, in _process_queue
        curl.info["headers"])
      File "/usr/local/lib/python2.6/dist-packages/tornado/curl_httpclient.py", line 276, in _curl_setup_request
        curl.setopt(pycurl.URL, request.url

)
TypeError: invalid arguments to setopt

我正在做的唯一不寻常的事情是调用这是我创建的另一个线程来做一些后台处理，它使用add_callback将控制权返回到ioloop线程。有没有人用2.0或类似的东西看过这个？

Answer 1

这些错误消息有点神秘，但在这两种情况下，我认为这是由于您的请求没有网址（除非callback是网址）。

2.0将ASyncHTTPClient实现切换为simple_httpclient（来自curl_httpclient），但我认为给出的示例在Tornado 1.2中也不起作用。

从1.2升级到2.0后，Tornado的AsyncHTTPClient不再有效

1 个答案: