4.1 HTTP请求中的Form Data与Request Payload的区别

参考：https://www.jianshu.com/p/dab2f33c958a

参考： https://segmentfault.com/a/1190000018774494#:~:text=The Request Payload - or to be more ,request%20with%20Content-Type%3A%20application%2Fjson%20may%20look%20like%20this%3A