unify the function

locust/static/locust.js

@@ -174,41 +174,23 @@ $("#directories .select2").select2({
     placeholder: "Select a state"
 });
 
+let whichform = $('.upload_file_form_test_file')[0];
 
 $('#upload_py_submit').click(function(event){
     event.preventDefault();
+    whichform = $('.upload_file_form_test_file')[0];
     $('.upload_file_form_test_file').submit();
 });
 
 $('#upload_json_submit').click(function(event){
     event.preventDefault();
-    $('.upload_file_form_json').submit();
-});
-
-$('.upload_file_form_test_file').submit(function(event) {
-    event.preventDefault();
-    var form_data = new FormData($('.upload_file_form_test_file')[0]);
-    $.ajax({
-        type: 'POST',
-        url: "/upload_file",
-        enctype: "multipart/form-data",
-        contentType: false,
-        data: form_data,
-        cache: false,
-        processData: false,
-        success: function (response) {
-            if (response.success) {
-                location.reload(true);
-            } else {
-                alert(response.message);
-            }
-        }
-    })
+    whichform = $('.upload_file_form_json')[0];
+    $('.upload_file_form_test_file').submit();
 });
 
-$('.upload_file_form_json').submit(function(event) {
+$('.upload_file_form_test_file, .upload_file_form_json').submit(function(event) {
     event.preventDefault();
-    var form_data = new FormData($('.upload_file_form_json')[0]);
+    var form_data = new FormData(whichform);
     $.ajax({
         type: 'POST',
         url: "/upload_file",
@@ -227,7 +209,6 @@ $('.upload_file_form_json').submit(function(event) {
     })
 });
 
-
 $('#submit_json_btn').click(function(){
     event.preventDefault();
     $('#hidden_config_json').val(JSON.stringify(json_editor.get(), null , 4));