postman的使用过程中遇到的问题
Flask 关于request的一些方法或属性的整理，就参考
https://www.cnblogs.com/yy-cola/p/8066020.html
看了这个博客解决了自己第二个问题。
问题1：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<title>400 Bad Request</title>
<h1>Bad Request</h1>
<p>The CSRF token is missing.</p>
用postman进行接口测试的时候，csrf防护要关掉，等到真正在网页上测试的时候再打开
问题2：
req_dict = request.get_json()
print(req_dict)
username = req_dict.get("username")
email = req_dict.get("email")
country = req_dict.get("country")
password = req_dict.get("password")
运行结果：
INFO:werkzeug: * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
None
INFO:werkzeug:127.0.0.1 - - [24/Dec/2018 09:02:42] "POST /api/v1.0/users HTTP/1.1" 500 -
Traceback (most recent call last):
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\_compat.py", line 35, in reraise
raise value
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\_compat.py", line 35, in reraise
raise value
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\windows7\Envs\dongfener\lib\site-packages\flask\app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\windows7\Desktop\DongFener-demoDongFener\dfadmin\1221\dongfener\api_1_0\passport.py", line 19, in register
username = req_dict.get("username")
AttributeError: 'NoneType' object has no attribute 'get'
原因是postman请求时请求方式出错：
请求方式应该是json格式，参数写在raw里面，，之前出错是忘记更改格式还有参数位置写错了，写的到了form-data里面