Open Radar

 
WKWebView cannot load files using file:// URL protocol that is within the app sandbox since iOS 8.0 beta 4 and 5. This worked in 8.0 beta 3, and still works in the iOS 8 simulators (all versions).

Dup of rdar://18039024 & rdar://17761459

Steps to Reproduce:
1. Create a file in your Documents folder (or Library, or Library/Caches, or tmp, or even load something in your app bundle)
2. Load that file in WKWebView as a file:// URL
3. The file will not load and result in an error


Expected Results:
WKWebView can load a file from a file URL from the app's sandbox (Documents, Library, Library/Caches, tmp, app bundle)


Actual Results:
WKWebView will not load a file from a file URL from the app's sandbox (Documents, Library, Library/Caches, tmp, app bundle)


Configuration: (hardware)
iMac 27-inch (Late 2012), iPhone 6 Plus, iPhone 6

Version & Build:
Xcode 6.2 (6C131e)
iOS Simulator 8.2 (553.8)
OS X 10.10.3 seed 3 (14D98g)

Regression:
This worked in 8.0 beta 3 and also works in all versions of the iOS 8 simulator. However, it has never worked on a device in any publicly released version of iOS 8.

Additional Notes:
There is a workaround to this issue which is demonstrable in the following sample project:
https://github.com/shazron/WKWebViewFIleUrlTest

The workaround is to copy the web content to a temporary directory inside the app sandbox and to give the WKWebView a URL to it there.