Removed use of xip.io, as it's not needed. #17642
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Removed use of xip.io as it's not needed. ATS doesn't apply to raw IP addresses, see: https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html
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Makes sense and test plan looks good! Thanks 👍 @facebook-github-bot shipit |
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By default, when a react-native app launches in development mode on a physical iOS device, it attempts to load the JS bundle from a packager at
http://_your-local-ip-address_.xip.io:8081/.This change removes the use of
xip.io, which changes that url to:http://_your-local-ip-address_:8081/Motivation
Background:
The automatic IP detection feature (introduced here) is super handy. However, it’s use of
xip.iohas caused myself and others much grief. Some routers do not allow or have intermittent errors when trying to resolve DNS names to local IP addresses. This prompted the introduction of a DISABLE_XIP feature, which helps.However, I don’t believe the use of
xip.iois needed at all.Based on this comment, it appears the original reason for using
xip.iowas to “circumvent the numeric IP address limitation in ATS”.But, the reason you can’t create ATS exceptions for raw IP addresses is that ATS is not enforced for raw IP addresses at all. You can read the Apple documentation here, the relevant portion is:
For example, in iOS, if you attempt to make an http request (note: not https) to
http://www.google.comyou will get an error due to ATS.However, you can make the same request to
http://172.217.6.14/(which for me is the same server) and the request will succeed.And in fact, if an ATS exception was needed, the DISABLE_XIP feature shouldn’t work at all, but it does.
In short, using
xip.iowith ATS exceptions is unnecessary, causes some very annoying problems for some people, and I think it should just be removed.Test Plan
Run the app on a physical iOS device and verify that it can load the JS bundle from the host computer's IP.
Related PRs
Implemented automatic IP detection for iOS #8091
Added option to disable xip #13326
Release Notes
[INTERNAL] [BUGFIX] [./scripts] - Removed use of xip.io