removed node-fetch from metro

Summary:
Updating `node-fetch` to the latest version caused tests in `packages/metro/src/integration_tests/__tests__/server-test.js` to fail. Running each test case inside the file failed individually, but there seems to have been a race condition between the tests causing subsequent tests to fail with the following error:
```
FetchError: request to http://localhost:10028/import-export/index.bundle?platform=ios&dev=true&minify=false failed, reason: socket hang up
```
It happens because the "connection: close" header is removed in the latest version of `node-fetch`: node-fetch/node-fetch#1765 and can be fixed by adding this header manually to fetches.
```
fetch('path', {headers: {'Connection': 'close'}});
```
However, since we only use `node-fetch` in this test it seems like a good chance to remove it completely and use the native `fetch` provided by node (stable since Node.js v21, but works well in older node versions for the purpose of testing).
The native fetch also defaults to `keepAlive: true` (https://github.com/nodejs/undici?tab=readme-ov-file#pipelining) which I manually tweaked to be false.

Differential Revision: D61336391

packages/metro/package.json

@@ -48,7 +48,6 @@
     "metro-transform-plugins": "0.80.10",
     "metro-transform-worker": "0.80.10",
     "mime-types": "^2.1.27",
-    "node-fetch": "^2.2.0",
     "nullthrows": "^1.1.1",
     "serialize-error": "^2.1.0",
     "source-map": "^0.5.6",

packages/metro/src/integration_tests/__tests__/server-test.js

@@ -13,20 +13,29 @@
 const Metro = require('../../..');
 const execBundle = require('../execBundle');
 const fs = require('fs');
-const fetch = require('node-fetch');
 const path = require('path');
+// native dependency of nodejs
+// eslint-disable-next-line import/no-extraneous-dependencies
+const {Agent} = require('undici');
 
 jest.unmock('cosmiconfig');
 
 jest.setTimeout(60 * 1000);
 
+const noKeepAliveFetch = (path: string) =>
+  fetch(path, {
+    dispatcher: new Agent({
+      pipelining: 0,
+    }),
+  });
+
 describe('Metro development server serves bundles via HTTP', () => {
   let config;
   let httpServer;
   const bundlesDownloaded = new Set();
 
   async function downloadAndExec(path: string, context = {}): mixed {
-    const response = await fetch(
+    const response = await noKeepAliveFetch(
       'http://localhost:' + config.server.port + path,
     );
     bundlesDownloaded.add(path);
@@ -111,14 +120,14 @@ describe('Metro development server serves bundles via HTTP', () => {
   });
 
   test('responds with 404 when the bundle cannot be resolved', async () => {
-    const response = await fetch(
+    const response = await noKeepAliveFetch(
       'http://localhost:' + config.server.port + '/doesnotexist.bundle',
     );
     expect(response.status).toBe(404);
   });
 
   test('responds with 500 when an import inside the bundle cannot be resolved', async () => {
-    const response = await fetch(
+    const response = await noKeepAliveFetch(
       'http://localhost:' +
         config.server.port +
         '/build-errors/inline-requires-cannot-resolve-import.bundle',
@@ -128,7 +137,7 @@ describe('Metro development server serves bundles via HTTP', () => {
 
   describe('dedicated endpoints for serving source files', () => {
     test('under /[metro-project]/', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/[metro-project]/TestBundle.js',
@@ -143,7 +152,7 @@ describe('Metro development server serves bundles via HTTP', () => {
     });
 
     test('under /[metro-watchFolders]/', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/[metro-watchFolders]/1/metro/src/integration_tests/basic_bundle/TestBundle.js',
@@ -158,7 +167,7 @@ describe('Metro development server serves bundles via HTTP', () => {
     });
 
     test('under /[metro-project]/', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/[metro-project]/TestBundle.js',
@@ -173,7 +182,7 @@ describe('Metro development server serves bundles via HTTP', () => {
     });
 
     test('no access to files without source extensions', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/[metro-project]/not_a_source_file.xyz',
@@ -188,7 +197,7 @@ describe('Metro development server serves bundles via HTTP', () => {
     });
 
     test('no access to source files excluded from the file map', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/[metro-project]/excluded_from_file_map.js',
@@ -203,7 +212,7 @@ describe('Metro development server serves bundles via HTTP', () => {
     });
 
     test('requested with aggressive URL encoding /%5Bmetro-project%5D', async () => {
-      const response = await fetch(
+      const response = await noKeepAliveFetch(
         'http://localhost:' +
           config.server.port +
           '/%5Bmetro-project%5D/Foo%2Ejs',

website/package.json

@@ -30,7 +30,6 @@
     "@sideway/formula": "^3.0.1",
     "got": "^11.8.5",
     "http-cache-semantics": "^4.1.1",
-    "node-fetch": "^2.0.0",
     "terser": "^5.14.2",
     "trim": "^0.0.3"
   }

yarn.lock

@@ -4923,13 +4923,6 @@ node-dir@^0.1.17:
   dependencies:
     minimatch "^3.0.2"
 
-node-fetch@^2.2.0:
-  version "2.6.7"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.7.tgz#24de9fba827e3b4ae44dc8b20256a379160052ad"
-  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
-  dependencies:
-    whatwg-url "^5.0.0"
-
 node-int64@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/node-int64/-/node-int64-0.4.0.tgz#87a9065cdb355d3182d8f94ce11188b825c68a3b"
@@ -5947,11 +5940,6 @@ to-regex-range@^5.0.1:
   dependencies:
     is-number "^7.0.0"
 
-tr46@~0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
-  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
-
 ts-api-utils@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/ts-api-utils/-/ts-api-utils-1.0.3.tgz#f12c1c781d04427313dbac808f453f050e54a331"
@@ -6130,19 +6118,6 @@ walker@^1.0.8:
   dependencies:
     makeerror "1.0.12"
 
-webidl-conversions@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
-  integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
-
-whatwg-url@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
-  integrity sha1-lmRU6HZUYuN2RNNib2dCzotwll0=
-  dependencies:
-    tr46 "~0.0.3"
-    webidl-conversions "^3.0.0"
-
 which-boxed-primitive@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz#13757bc89b209b049fe5d86430e21cf40a89a8e6"