Flask:request.json可以工作，但是request.get_json（）会导致错误代码500

Question

documentation说要使用request.get_json()，但这会导致服务返回一个错误：

Server returned HTTP response code: 500

但是，调用request.data或request.json都可以。

堆栈跟踪：

Traceback (most recent call last):
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1701, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/blake/ves/p27/lib/python2.7/site-packages/werkzeug/contrib/fixers.py", line 125, in __call__
    return self.app(environ, start_response)
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1689, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1687, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1360, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1358, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/blake/ves/p27/lib/python2.7/site-packages/flask/app.py", line 1344, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/blake/workspace/starcycle-flask/starcycleweb.py", line 17, in api
    print request.get_json()
  File "/home/blake/ves/p27/lib/python2.7/site-packages/werkzeug/local.py", line 336, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: 'Request' object has no attribute 'get_json'

我认为获取json是获取json数据的首选方法。

Answer 1

在Flask/wrappers.py中，方法get_json()被定义为类Request的方法。

但是，同一个文件仍然包含旧的、不推荐使用的方法json()。如果您有旧版本的烧瓶，则a）更新或b）改用request.json()。

Answer 2

我对flask Response对象也有类似的错误，它最终是一个版本问题，我们使用了flask 0.12.1，get_json（）在1.0.2上可用

文件：

http://flask.pocoo.org/docs/0.12/api/#response-objects

对

http://flask.pocoo.org/docs/1.0/api/#response-objects