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我有一个使用 gunicorn 运行的应用服务器和 api 服务器。两台服务器都是金字塔应用程序。

浏览器从应用服务器加载 html 和静态文件，然后直接与 api 服务器对话。

浏览器需要做一个文件上传操作。这一直有效。我为执行文件上传的 OPTION 方法做了以下操作，因为它是一个跨域帖子

response.headers['Access-Control-Allow-Origin'] = origin

问题是本地机器已经开始超时对 api 服务器的 OPTION 调用。第一次出现此错误

File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/workers/sync.py", line 87, in handle
    req = six.next(parser)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/parser.py", line 39, in __next__
    self.mesg = self.mesg_class(self.cfg, self.unreader, self.req_count)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/message.py", line 152, in __init__
    super(Request, self).__init__(cfg, unreader)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/message.py", line 49, in __init__
    unused = self.parse(self.unreader)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/message.py", line 167, in parse
    line, rbuf = self.read_line(unreader, buf, self.limit_request_line)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/message.py", line 217, in read_line
    self.get_data(unreader, buf)
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/message.py", line 155, in get_data
    data = unreader.read()
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/unreader.py", line 38, in read
    d = self.chunk()
  File "/home/ranjith/workspace/venv/local/lib/python2.7/site-packages/gunicorn-0.17.4-py2.7.egg/gunicorn/http/unreader.py", line 65, in chunk
    return self.sock.recv(self.mxchunk)

error: [Errno 4] Interrupted system call
2013-05-27 11:37:17 [19097] [INFO] Handling signal: winch
2013-05-27 11:37:17,533 ERROR [gunicorn.error][MainThread] Error processing request.

之后它完全停止工作。所有其他调用都有效。以前可以使用 OPTIONS 调用。我不确定为什么这不起作用，这让我很沮丧。这同样适用于我们的测试服务器等。我不知道是什么坏了，为什么

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