我正在向协程函数发送一个发布请求，但出现以下错误。
Traceback (most recent call last):
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1994, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1985, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1540, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.4/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1615, in full_dispatch_request
return self.finalize_request(rv)
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1630, in finalize_request
response = self.make_response(rv)
File "/usr/local/lib/python3.4/site-packages/flask/app.py", line 1740, in make_response
rv = self.response_class.force_type(rv, request.environ)
File "/usr/local/lib/python3.4/site-packages/werkzeug/wrappers.py", line …