fix

Author: orionmiz

packages/plantae/src/axios/createAxiosInterceptors.spec.ts

@@ -585,7 +585,7 @@ describe("createAxiosInterceptors", () => {
     );
   });
 
-  it.only("should not throw error if form data body is reused", async () => {
+  it("should not throw error while form data request is retried", async () => {
     let retried = false;
 
     server.use(
@@ -604,7 +604,7 @@ describe("createAxiosInterceptors", () => {
       client: axios,
       plugins: [
         {
-          name: "plugin-modify-body",
+          name: "plugin-retry",
           hooks: {
             afterResponse: (res, req, retry) => {
               if (res.status === 500) {

packages/plantae/src/axios/createAxiosInterceptors.ts

@@ -54,10 +54,17 @@ function convertToAdapterRequest(
         ? "omit"
         : "same-origin";
 
+  const headers = new Headers(req.headers.toJSON(true) as HeadersInit);
+
+  // Let `Request` constructor set `Content-Type` header
+  if (transformedData instanceof FormData) {
+    headers.delete("Content-Type");
+  }
+
   return new Request(url, {
     body: transformedData,
     method: req.method ?? "GET",
-    headers: new Headers(req.headers.toJSON(true) as HeadersInit),
+    headers,
     signal: req.signal as AbortSignal,
     credentials,
   });