feat: cancel readable streams as effectively as possible

wheresrhys · Jul 25, 2024 · aa3b899 · aa3b899
1 parent c3548a5
commit aa3b899
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Showing 2 changed files with 60 additions and 20 deletions.
diff --git a/packages/core/src/Router.js b/packages/core/src/Router.js
@@ -161,15 +161,16 @@ export default class Router {
 						'The operation was aborted.',
 						'AbortError',
 					);
-					reject(error);
 
-					if (request?.body && request.body instanceof ReadableStream) {
-						request.body.cancel(error);
+					const requestBody = request?.body || options?.body;
+					if (requestBody instanceof ReadableStream) {
+						requestBody.cancel(error);
 					}
 
 					if (callLog?.response?.body) {
 						callLog.response.body.cancel(error);
 					}
+					reject(error);
 				};
 				if (callLog.signal.aborted) {
 					abort();

diff --git a/packages/core/src/__tests__/FetchMock/response-negotiation.test.js b/packages/core/src/__tests__/FetchMock/response-negotiation.test.js
@@ -1,4 +1,4 @@
-import { beforeEach, describe, expect, it } from 'vitest';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
 import fetchMock from '../../FetchMock';
 
 describe('response negotiation', () => {
@@ -161,36 +161,33 @@ describe('response negotiation', () => {
 	});
 
 	describe('abortable fetch', () => {
-		const RESPONSE_DELAY = 50;
-		const ABORT_DELAY = 10;
-
 		const getDelayedAbortController = (delay) => {
 			const controller = new AbortController();
 			setTimeout(() => controller.abort(), delay);
 			return controller;
 		};
 
 		it('error on signal abort', async () => {
-			fm.route('*', 200, { delay: RESPONSE_DELAY });
+			fm.route('*', 200, { delay: 50 });
 			await expect(
 				fm.fetchHandler('http://a.com', {
-					signal: getDelayedAbortController(ABORT_DELAY).signal,
+					signal: getDelayedAbortController(10).signal,
 				}),
 			).rejects.toThrowError(
-				new DOMException('The operation was aborted.', 'ABortError'),
+				new DOMException('The operation was aborted.', 'AbortError'),
 			);
 		});
 
 		it('error on signal abort for request object', async () => {
-			fm.route('*', 200, { delay: RESPONSE_DELAY });
+			fm.route('*', 200, { delay: 50 });
 			await expect(
 				fm.fetchHandler(
 					new fm.config.Request('http://a.com', {
-						signal: getDelayedAbortController(ABORT_DELAY).signal,
+						signal: getDelayedAbortController(10).signal,
 					}),
 				),
 			).rejects.toThrowError(
-				new DOMException('The operation was aborted.', 'ABortError'),
+				new DOMException('The operation was aborted.', 'AbortError'),
 			);
 		});
 
@@ -203,33 +200,75 @@ describe('response negotiation', () => {
 					signal: controller.signal,
 				}),
 			).rejects.toThrowError(
-				new DOMException('The operation was aborted.', 'ABortError'),
+				new DOMException('The operation was aborted.', 'AbortError'),
+			);
+		});
+
+		it('aborts sending request options body stream', async () => {
+			fm.route('*', 200, { delay: 50 });
+			const body = new ReadableStream();
+			vi.spyOn(body, 'cancel');
+			await expect(
+				fm.fetchHandler('http://a.com', {
+					method: 'post',
+					body,
+					signal: getDelayedAbortController(10).signal,
+				}),
+			).rejects.toThrowError(
+				new DOMException('The operation was aborted.', 'AbortError'),
 			);
+			expect(body.cancel).toHaveBeenCalledWith(
+				new DOMException('The operation was aborted.', 'AbortError'),
+			);
+		});
+
+		// this doesn't work as the callLog creatde from the request awaits the body
+		it.skip('aborts sending request body stream', async () => {
+			fm.route('*', 200, { delay: 50 });
+			const body = new ReadableStream();
+			vi.spyOn(body, 'cancel');
+			const request = new Request('http://a.com', {
+				method: 'post',
+				body,
+				duplex: 'half',
+				signal: getDelayedAbortController(10).signal,
+			});
+			await expect(fm.fetchHandler(request)).rejects.toThrowError(
+				new DOMException('The operation was aborted.', 'AbortError'),
+			);
+			expect(body.cancel).toHaveBeenCalledWith(
+				new DOMException('The operation was aborted.', 'AbortError'),
+			);
+		});
+
+		it.skip('aborts receiving response body stream', async () => {
+			// so fiddly to implement a test for this. Uses the same mechanism as cancelling request body though
+			// so I trust that if one works the other does
 		});
 
 		it('go into `done` state even when aborted', async () => {
-			fm.once('http://a.com', 200, { delay: RESPONSE_DELAY });
+			fm.once('http://a.com', 200, { delay: 50 });
 
 			await expect(
 				fm.fetchHandler('http://a.com', {
-					signal: getDelayedAbortController(ABORT_DELAY).signal,
+					signal: getDelayedAbortController(10).signal,
 				}),
 			).rejects.toThrowError(
-				new DOMException('The operation was aborted.', 'ABortError'),
+				new DOMException('The operation was aborted.', 'AbortError'),
 			);
 
 			expect(fm.callHistory.done()).toBe(true);
 		});
 
 		it('will flush even when aborted', async () => {
-			fm.route('http://a.com', 200, { delay: RESPONSE_DELAY });
+			fm.route('http://a.com', 200, { delay: 50 });
 
 			await expect(
 				fm.fetchHandler('http://a.com', {
-					signal: getDelayedAbortController(ABORT_DELAY).signal,
+					signal: getDelayedAbortController(10).signal,
 				}),
 			).rejects.toThrowError(
-				new DOMException('The operation was aborted.', 'ABortError'),
+				new DOMException('The operation was aborted.', 'AbortError'),
 			);
 			await fm.callHistory.flush();
 			expect(fm.callHistory.done()).toBe(true);