Before and after the separation of the development of WeChat small program: front end call wx. Request () to send a post request, carried by the cords (only one string parameter of type name), the backend is received null values, is excuse me this why? I have amend the request header to

 
Header: {
'the content-type' : 'application/x - WWW - form - urlencoded', 
}, 

But I still can't solve the problem,