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我正在使用Python 3.5編碼的websocket服務器。這是需要提供我的網站實時信息。Python龍捲風SSL websocket連接
我使用的「服務器」庫稱爲tornado（version 4.5b2），它處理websocket連接和http請求。爲了向後兼容（如果瀏覽器還不支持websocket），我使用python庫sockjs-tornado（版本1.0.3），它也向websocket連接添加了一些附加功能。
現在我的問題是，如果我啓動服務器，我會在控制檯中發現很多龍捲風ssl錯誤。它不會崩潰，但是如果大約80個客戶端連接到websocket 3，則會經常發生錯誤。我使用加密連接並且它可以工作，但是如果發生其中一個錯誤，則某些客戶端將從websocket連接中被踢出。
Python腳本使用多個線程，服務器受cloudflare保護，這是一種中間人，並將每個請求重定向到服務器或用戶。
這些都是3個錯誤：
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
此錯誤不會經常出現的第一個。
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)
而且有時會出現這樣的錯誤：
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
實際上，既然你說你正在使用多個線程，這看起來可能是錯誤地使用線程的結果。你只能**從'IOLoop'線程調用'WebSocketHandler'的方法;你不能從任何其他線程寫入套接字。 –