fix: urlencoded webhook payload parsing

.changeset/real-badgers-clap.md

@@ -0,0 +1,5 @@
+---
+'@rocket.chat/meteor': patch
+---
+
+Fixes receiving webhook payloads encoded as x-www-form-urlencoded JSON.

apps/meteor/app/integrations/server/api/api.js

@@ -319,19 +319,21 @@ Api.router.use((req, res, next) => {
 		return next();
 	}
 
-	const payloadKeys = Object.keys(req.body);
-	if (payloadKeys.length !== 1) {
+	// make sure body has only one key and it is 'payload'
+	if (!req.body || typeof req.body !== 'object' || !('payload' in req.body) || Object.keys(req.body).length !== 1) {
 		return next();
 	}
 
 	try {
-		// need to compose the full payload in this weird way because body-parser thought it was a form
-		req.bodyParams = JSON.parse(payloadKeys[0] + req.body[payloadKeys[0]]);
+		req.bodyParams = JSON.parse(req.body.payload);
+
 		return next();
 	} catch (e) {
 		res.writeHead(400);
 		res.end(JSON.stringify({ success: false, error: e.message }));
 	}
+
+	return next();
 });
 
 Api.addRoute(

apps/meteor/tests/end-to-end/api/incoming-integrations.ts

@@ -305,6 +305,31 @@ describe('[Incoming Integrations]', () => {
 					expect(!!(res.body.messages as IMessage[]).find((m) => m.msg === successfulMesssage)).to.be.true;
 				});
 		});
+
+		it('should send a message if the payload is a application/x-www-form-urlencoded JSON', async () => {
+			const payload = { msg: `Message as x-www-form-urlencoded JSON sent successfully at #${Date.now()}` };
+
+			await request
+				.post(`/hooks/${integration._id}/${integration.token}`)
+				.set('Content-Type', 'application/x-www-form-urlencoded')
+				.send(`payload=${JSON.stringify(payload)}`)
+				.expect(200)
+				.expect(async () => {
+					return request
+						.get(api('channels.messages'))
+						.set(credentials)
+						.query({
+							roomId: 'GENERAL',
+						})
+						.expect('Content-Type', 'application/json')
+						.expect(200)
+						.expect((res) => {
+							expect(res.body).to.have.property('success', true);
+							expect(res.body).to.have.property('messages').and.to.be.an('array');
+							expect(!!(res.body.messages as IMessage[]).find((m) => m.msg === payload.msg)).to.be.true;
+						});
+				});
+		});
 	});
 
 	describe('[/integrations.history]', () => {