Releasing v3.24.1

CHANGELOG.md

@@ -1,3 +1,13 @@
+### v3.24.1 (2026-06-03)
+* * *
+### Bug Fixes:
+- Fixed `Content-Length` header being computed from the JavaScript string length (UTF-16 code units) instead of the UTF-8 byte length. Requests with non-ASCII payloads (e.g. accented characters, CJK, emoji) under-declared `Content-Length` and were rejected by Node's `fetch`/undici (≥ 7.26.0) with `Request body length does not match content-length header`. The header is now computed via `Buffer.byteLength(data, 'utf8')`. Resolves https://github.com/chargebee/chargebee-node/issues/119. 
+
+### Tests:
+- ASCII form-urlencoded body — `Content-Length` matches the UTF-8 byte length of the serialized body.
+- Multi-byte JSON body — `Content-Length` matches the UTF-8 byte length and is greater than the JS character count, ensuring the regression cannot return.
+
+
 ### v3.24.0 (2026-05-04)
 * * *
 ### New Resources:

VERSION

@@ -1 +1 @@
-3.24.0
+3.24.1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "chargebee",
-  "version": "3.24.0",
+  "version": "3.24.1",
   "description": "A library for integrating with Chargebee.",
   "scripts": {
     "prepack": "npm install && npm run build",

src/RequestWrapper.ts

@@ -122,7 +122,7 @@ export class RequestWrapper {
       const requestHeaders: RequestHeaders = { ...this.httpHeaders };
       if (data && data.length) {
         extend(true, requestHeaders, {
-          'Content-Length': data.length,
+          'Content-Length': Buffer.byteLength(data, 'utf8'),
         });
       }
 

src/environment.ts

@@ -9,7 +9,7 @@ export const Environment = {
   hostSuffix: '.chargebee.com',
   apiPath: '/api/v2',
   timeout: DEFAULT_TIME_OUT,
-  clientVersion: 'v3.24.0',
+  clientVersion: 'v3.24.1',
   port: DEFAULT_PORT,
   timemachineWaitInMillis: DEFAULT_TIME_MACHINE_WAIT,
   exportWaitInMillis: DEFAULT_EXPORT_WAIT,

test/requestWrapper.test.ts

@@ -189,6 +189,48 @@ describe('RequestWrapper - request headers', () => {
     });
   });
 
+  describe('Content-Length header', () => {
+    it('should set Content-Length to the UTF-8 byte length for ASCII form-urlencoded bodies', async () => {
+      responseFactory = () =>
+        new Response(JSON.stringify({ customer: { id: 'cust_123' } }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        });
+
+      const chargebee = createChargebee();
+      await chargebee.customer.create({ first_name: 'John' });
+
+      const body = await capturedRequests[0].text();
+      const expected = Buffer.byteLength(body, 'utf8');
+      expect(capturedRequests[0].headers.get('Content-Length')).to.equal(
+        String(expected),
+      );
+    });
+
+    it('should set Content-Length to the UTF-8 byte length (not character count) for multi-byte JSON bodies', async () => {
+      responseFactory = () =>
+        new Response(JSON.stringify({ personalized_offers: [] }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        });
+
+      const chargebee = createChargebee();
+      await chargebee.personalizedOffer.personalizedOffers({
+        customer_id: 'cust_123',
+        first_name: 'Jürgen',
+        last_name: 'Müller — 🎉',
+      });
+
+      const body = await capturedRequests[0].text();
+      const byteLength = Buffer.byteLength(body, 'utf8');
+      const charLength = body.length;
+      expect(byteLength).to.be.greaterThan(charLength);
+      expect(capturedRequests[0].headers.get('Content-Length')).to.equal(
+        String(byteLength),
+      );
+    });
+  });
+
   describe('Lang-Version header', () => {
     it('should set Lang-Version to the current Node.js process.version', async () => {
       const chargebee = createChargebee();