HTTP POST not sending body in IOS<11

[Shubham Chawla]

HTTP Post is not sending body for iOS version <11 in WKWebView. 

Sample request is 

            fireXhr("https://hooks.zapier.com/hooks/catch/XXX/", {
               loginId: 4,
               password: 4
              }, "POST", 
                    {},
                    function(response) {
                  console.log(response);
              });
          }
         
          function fireXhr(url, data, method, headers, callback) {
            try {
              var request = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");
              callback && (request.onreadystatechange = function() {
                if(request.readyState == 4 && request.status == 200) {
                  callback(request);
                }
              });
              request.open(method, url, true);
              for(var header in headers) {
                request.setRequestHeader(header, headers[header]);
              }
              request.send(JSON.stringify(data));
            }
            catch(e) {
              console.log(e);
            }
          }

[Alexey Proskuryakov]

If this works correctly in currently shipping version, then there is nothing to fix from WebKit side. We can not change the past.