iOS 12.0 Beta 1 WKWebview cross origin requests fail - Preflight response is not successful
Originator: | joel.kennedy | ||
Number: | rdar://40807782 | Date Originated: | 05/06/2018 |
Status: | Open | Resolved: | |
Product: | iOS | Product Version: | 12.0 Beta 1 |
Classification: | Reproducible: | Always |
In iOS 12.0 Beta 1, Ajax cross origin requests are failing from WKWebview with the error "Preflight response is not successful. XMLHttpRequest cannot load [url omitted] due to access control checks". This happens even when the remote server is setting "Access-Control-Allow-Origin: *" as a response header. Steps to Reproduce: Make an Ajax cross origin request from a page running inside WKWebview being served off localhost on a device running iOS 12. Ensure the server being connected to is returning a "Access-Control-Allow-Origin: *" header. Expected Results: The request should succeed. Actual Results: The request fails with an error in console: "Preflight response is not successful. XMLHttpRequest cannot load [url omitted] due to access control checks".
Comments
Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!
Regression?
I'm having this problem with iOS 12 now - see https://stackoverflow.com/questions/52434011/how-to-fix-ios-12-safari-cors-preflight-error?noredirect=1#comment91847506_52434011
I've reported it here https://bugreport.apple.com/web/?problemID=44621834
and it is duped here https://bugreport.apple.com/web/?problemID=42546319
but I cannot see that ticket
It look like Xcode 10 beta 2 respectively iOS 12 beta 2 solves the issue...it deserves a try
Yes, in iOS 12 Beta 2 this is fixed.
I have the same issue with WKWebView and iOS 12 Beta 1.
Hi there! Seeing this as well in a bunch of other apps. We're currently tracking this in Ionic here https://github.com/ionic-team/cordova-plugin-ionic-webview/issues/112
Seems to be specific to WKWebview