188237 2018-08-01 14:24:07 -0700 Form post with redirect fails to send body when a service worker is registered 2024-12-06 12:00:00 -0800 1 1 1 Unclassified WebKit Service Workers Safari 11 Mac macOS 10.12 NEW P2 Normal --- 1 patrick.f.housley webkit-unassigned cdumez js-webkit wes youennf oldest_to_newest 1446989 0 patrick.f.housley 2018-08-01 14:24:07 -0700 Overview: When a service worker is registered and a user attempts to submit a form that POSTs data to an endpoint that responds with a 307 redirect, the browser does not send the original POST body to the new URI. Steps to Reproduce: 1) Access https://webkit-service-worker-test.herokuapp.com/ 2) Enter any data into the form 3) Submit the form Source code for test: https://github.com/patrickhousley/webkit-service-worker-test Actual Results: In Safari, the page shows no body data was sent when the browser's request was redirected. Attempt the same thing in Chrome or Firefox and the body data will be present. Expected Results: The form data should be sent to the new URI when the browser receives a 307 redirect. Build Date & Hardware: Mac OS X 10.12.6 Safari 11.1.2 (12605.3.8.1) 1977479 1 js-webkit 2023-09-14 06:01:39 -0700 I just stumbled upon this bug. It's 5 years old and still not fixed (Safari 16.6). Firefox and Chrome behave according to the spec. 2079705 2 wes 2024-12-06 12:00:00 -0800 FWIW, I forked the repo and ran it on Safari 18.0 and it did not reproduce for me.