Flask Did not attempt to load JSON data because the request Content-Type was not ‘application/json‘

今天在部署flask应用的时候，发现版本不兼容，我升级了一下flask的版本到2.2，结果出现了下面的错误：

File "/root/anaconda3/lib/python3.8/site-packages/werkzeug/wrappers/request.py", line 540, in json                                
    return self.get_json()                                                                                                          
  File "/root/anaconda3/lib/python3.8/site-packages/werkzeug/wrappers/request.py", line 571, in get_json                            
    return self.on_json_loading_failed(None)                                                                                        
  File "/root/anaconda3/lib/python3.8/site-packages/flask/wrappers.py", line 128, in on_json_loading_failed                         
    return super().on_json_loading_failed(e)                                                                                        
  File "/root/anaconda3/lib/python3.8/site-packages/werkzeug/wrappers/request.py", line 611, in on_json_loading_failed              
    raise BadRequest(                                                                                                               
werkzeug.exceptions.BadRequest: 400 Bad Request: Did not attempt to load JSON data because the request Content-Type was not 'applica
tion/json'.

解决方法

没有啥好的方法，flask 2.1以上都有这个问题，只能回退到2.0版本：

pip install flask==2.0