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我正在使用Python 3.5编码的websocket服务器。这是需要提供我的网站实时信息。Python龙卷风SSL websocket连接
我使用的“服务器”库称为tornado（version 4.5b2），它处理websocket连接和http请求。为了向后兼容（如果浏览器还不支持websocket），我使用python库sockjs-tornado（版本1.0.3），它也向websocket连接添加了一些附加功能。
现在我的问题是，如果我启动服务器，我会在控制台中发现很多龙卷风ssl错误。它不会崩溃，但是如果大约80个客户端连接到websocket 3，则会经常发生错误。我使用加密连接并且它可以工作，但是如果发生其中一个错误，则某些客户端将从websocket连接中被踢出。
Python脚本使用多个线程，服务器受cloudflare保护，这是一种中间人，并将每个请求重定向到服务器或用户。
这些都是3个错误：
ERROR:tornado.general:Uncaught exception, closing connection.
Traceback (most recent call last):
File "/home/website/python/tornado/iostream.py", line 523, in _handle_events
self._handle_write()
File "/home/website/python/tornado/iostream.py", line 1398, in _handle_write
super(SSLIOStream, self)._handle_write()
File "/home/website/python/tornado/iostream.py", line 847, in _handle_write
assert self._write_buffer_size >= 0
AssertionError
ERROR:tornado.application:Exception in callback None
Traceback (most recent call last):
File "/home/website/python/tornado/ioloop.py", line 888, in start
handler_func(fd_obj, events)
File "/home/website/python/tornado/stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
File "/home/website/python/tornado/iostream.py", line 523, in _handle_events
self._handle_write()
File "/home/website/python/tornado/iostream.py", line 1398, in _handle_write
super(SSLIOStream, self)._handle_write()
File "/home/website/python/tornado/iostream.py", line 847, in _handle_write
assert self._write_buffer_size >= 0
AssertionError
此错误不会经常出现的第一个。
ERROR:tornado.application:Uncaught exception GET /sockjs/398/ssputw1s/websocket
HTTPServerRequest(protocol='https', host='****.com:8443', method='GET', uri='/sockjs/398/ssputw1s/websocket', version='HTTP/1.1', remote_ip='****', headers={'Accept-Encoding': 'gzip', 'Cf-Visitor': '{"scheme":"https"}', 'Sec-Websocket-Key': '****', 'Host': '****.com:8443', 'X-Forwarded-Proto': 'https', 'Cache-Control': 'no-cache', 'Sec-Websocket-Version': '13', 'Cf-Ipcountry': 'FR', 'X-Forwarded-For': '****', 'Sec-Websocket-Extensions': 'x-webkit-deflate-frame', 'Origin': 'https://****.com', 'Cf-Connecting-Ip': '****', 'Cookie': '****', 'Upgrade': 'websocket', 'Cf-Ray': '34edb1a17c456908-CDG', 'User-Agent': '****', 'Connection': 'Upgrade', 'Pragma': 'no-cache'})
Traceback (most recent call last):
File "/home/website/python/tornado/web.py", line 1464, in _stack_context_handle_exception
raise_exc_info((type, value, traceback))
File "<string>", line 4, in raise_exc_info
File "/home/website/python/tornado/stack_context.py", line 316, in wrapped
ret = fn(*args, **kwargs)
File "/home/website/python/tornado/websocket.py", line 865, in _on_masked_frame_data
self._on_frame_data(_websocket_mask(self._frame_mask, data))
File "/home/website/python/tornado/websocket.py", line 910, in _on_frame_data
self._receive_frame()
File "/home/website/python/tornado/websocket.py", line 784, in _receive_frame
self.stream.read_bytes(2, self._on_frame_start)
File "/home/website/python/tornado/iostream.py", line 324, in read_bytes
self._try_inline_read()
File "/home/website/python/tornado/iostream.py", line 711, in _try_inline_read
pos = self._read_to_buffer_loop()
File "/home/website/python/tornado/iostream.py", line 625, in _read_to_buffer_loop
if self._read_to_buffer() == 0:
File "/home/website/python/tornado/iostream.py", line 738, in _read_to_buffer
chunk = self.read_from_fd()
File "/home/website/python/tornado/iostream.py", line 1487, in read_from_fd
chunk = self.socket.read(self.read_chunk_size)
File "/usr/lib64/python3.5/ssl.py", line 799, in read
return self._sslobj.read(len, buffer)
File "/usr/lib64/python3.5/ssl.py", line 585, in read
v = self._sslobj.read(len)
ssl.SSLWantWriteError: The operation did not complete (write) (_ssl.c:2090)
而且有时会出现这样的错误：
ERROR:tornado.general:Uncaught exception, closing connection.
Traceback (most recent call last):
File "/home/website/python/tornado/iostream.py", line 523, in _handle_events
self._handle_write()
File "/home/website/python/tornado/iostream.py", line 1398, in _handle_write
super(SSLIOStream, self)._handle_write()
File "/home/website/python/tornado/iostream.py", line 872, in _handle_write
del self._write_buffer[:self._write_buffer_pos]
BufferError: Existing exports of data: object cannot be re-sized
ERROR:tornado.application:Exception in callback None
Traceback (most recent call last):
File "/home/website/python/tornado/ioloop.py", line 888, in start
handler_func(fd_obj, events)
File "/home/website/python/tornado/stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
File "/home/website/python/tornado/iostream.py", line 523, in _handle_events
self._handle_write()
File "/home/website/python/tornado/iostream.py", line 1398, in _handle_write
super(SSLIOStream, self)._handle_write()
File "/home/website/python/tornado/iostream.py", line 872, in _handle_write
del self._write_buffer[:self._write_buffer_pos]
BufferError: Existing exports of data: object cannot be re-sized
实际上，既然你说你正在使用多个线程，这看起来可能是错误地使用线程的结果。你只能**从'IOLoop'线程调用'WebSocketHandler'的方法;你不能从任何其他线程写入套接字。 –