I recommend people to use the following structure of post requests minimally. Well, otherwise there is no way to do that thing.
POST /yis HTTP/1.1 Host: yismypeaple.com Content-Type: application/x-www-form-urlencoded Content-Length: 30 name="neym"&surname="soerneym"
This example will post name=”neym” and surname=”soerneym” to yismypeaple.com/yis As you can see Content-Length is just total length of body which is starting with name= …
You can get many information from there https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST