Skip formatting if FormData input is provided

Author: frazar

Diff for: templates/base/http-clients/fetch-http-client.ejs

@@ -104,8 +104,12 @@ export class HttpClient<SecurityDataType = unknown> {
     private contentFormatters: Record<ContentType, (input: any) => any> = {
         [ContentType.Json]: (input:any) => input !== null && (typeof input === "object" || typeof input === "string") ? JSON.stringify(input) : input,
         [ContentType.Text]: (input:any) => input !== null && typeof input !== "string" ? JSON.stringify(input) : input,
-        [ContentType.FormData]: (input: any) =>
-            Object.keys(input || {}).reduce((formData, key) => {
+        [ContentType.FormData]: (input: any) => {
+            if (input instanceof FormData) {
+                return input;
+            }
+
+            return Object.keys(input || {}).reduce((formData, key) => {
                 const property = input[key];
                 formData.append(
                     key,
@@ -116,7 +120,8 @@ export class HttpClient<SecurityDataType = unknown> {
                     `${property}`
                 );
                 return formData;
-            }, new FormData()),
+            }, new FormData());
+        }
         [ContentType.UrlEncoded]: (input: any) => this.toQueryString(input),
     }