René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"HttpClient request fails in development during SSR with SSL enabled","articleBody":"### Command\n\nserve\n\n### Is this a regression?\n\n- [ ] Yes, this behavior used to work in the previous version\n\n### The previous version in which this bug was not present was\n\n_No response_\n\n### Description\n\nWhen using `ng serve` with SSR and an SSL certificate the HttpClient request fails during SSR\n\nGitHub repo: https://github.com/brandonroberts/angular-ssl-assets\n\n\n\n### Minimal Reproduction\n\n## Setup\n\n1. Install dependencies\n\n```sh\nnpm install\n```\n\n2. Run application\n\n```sh\nnpm start\n```\n\n3. Navigate to `https://localhost:4430` and notice the error in the command line console, and the flash of data on the page.\n\n\n## Workaround\n\nThe workaround is to run `NODE_TLS_REJECT_UNAUTHORIZED=0 ng serve` \n\n1. Run application\n\n```sh\nnpm run start:cert\n```\n\n2. Navigate to `https://localhost:4430` and notice the Node warning in the command line console, but no flash of data on the page.\n\n\n\n### Exception or Error\n\n```text\nERROR HttpErrorResponse {\n  headers: _HttpHeaders {\n    headers: Map(0) {},\n    normalizedNames: Map(0) {},\n    lazyInit: undefined,\n    lazyUpdate: null\n  },\n  status: 0,\n  statusText: 'Unknown Error',\n  url: 'https://localhost:4430/assets/data.json',\n  ok: false,\n  type: undefined,\n  redirected: undefined,\n  name: 'HttpErrorResponse',\n  message: 'Http failure response for https://localhost:4430/assets/data.json: 0 undefined',\n  error: TypeError: fetch failed\n      at node:internal/deps/undici/undici:13510:13\n      at _ZoneDelegate.invoke (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:336:158)\n      at ZoneImpl.run (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:105:35)\n      at eval (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:1040:30)\n      at _ZoneDelegate.invokeTask (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:362:171)\n      at ZoneImpl.runTask (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:143:37)\n      at drainMicroTaskQueue (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:522:23)\n      at process.processTicksAndRejections (node:internal/process/task_queues:105:5) {\n    [cause]: Error: unable to verify the first certificate\n        at TLSSocket.onConnectSecure (node:_tls_wrap:1679:34)\n        at _ZoneDelegate.invokeTask (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:362:171)\n        at ZoneImpl.runTask (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:143:37)\n        at invokeTask (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:439:26)\n        at TLSSocket.ZoneTask.invoke (/Users/computer/projects/angular-ssl-assets/.angular/cache/20.3.9/angular-ssl-assets/vite/deps_ssr/zone__js_node.js:428:38)\n        at TLSSocket.emit (node:events:518:28)\n        at TLSSocket._finishInit (node:_tls_wrap:1078:8)\n        at ssl.onhandshakedone (node:_tls_wrap:864:12) {\n      code: 'UNABLE_TO_VERIFY_LEAF_SIGNATURE'\n    }\n  }\n}\n```\n\n### Your Environment\n\n```text\nAngular: 20.3.9\n... build, cli, common, compiler, compiler-cli, core, forms\n... platform-browser, platform-server, router, ssr\n\nPackage                      Version\n------------------------------------\n@angular-devkit/architect    0.2003.9\n@angular-devkit/core         20.3.9\n@angular-devkit/schematics   20.3.9\n@schematics/angular          20.3.9\nrxjs                         7.8.2\ntypescript                   5.9.3\nzone.js                      0.15.1\n```\n\n### Anything else relevant?\n\nIts a self-signed certificate for local development using `mkcert localhost`.","author":{"url":"https://github.com/brandonroberts","@type":"Person","name":"brandonroberts"},"datePublished":"2025-11-05T17:54:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/31710/angular-cli/issues/31710"}