sonlichao opened a new issue, #1564:
URL: https://github.com/apache/cordova-ios/issues/1564
# Bug Report
## Problem
### What is expected to happen?
Local media files should be accessible via `fileEntry.toURL()` URLs in HTML
media elements (video, audio, img) on iOS 26, maintaining backward
compatibility with existing Cordova apps.
### What does actually happen?
On iOS 26, `fileEntry.toURL()` returns `file:///` URLs that cannot be loaded
in media elements. The browser console shows:
`WebContent[3,768] Could not create a sandbox extension for '<private>'`
Media elements fail to load/play local files.
## Information
### Command or Code
```javascript
// Save file using cordova-plugin-file
window.resolveLocalFileSystemURL(cordova.file.tmpDirectory, (dirEntry) => {
dirEntry.getFile(fileName, { create: true }, (fileEntry) => {
fileEntry.createWriter((fileWriter) => {
fileWriter.onwriteend = () => {
// Get URL using official API
const fileURL = fileEntry.toURL();
console.log(fileURL);
// Output:
file:///var/mobile/Containers/Data/Application/.../tmp/video.mp4
// This fails on iOS 26 with sandbox error
document.getElementById('videoElement').src = fileURL;
};
fileWriter.write(blob);
});
});
});
```
Environment, Platform, Device
Platform: iOS 26.0
Device: iPhone SE (3rd generation)
WebView: WKWebView (default)
Configuration: Default Cordova setup (no custom scheme/hostname)
Version information
Cordova CLI: 12.0.0
Cordova iOS: [7.1.0]
Cordova Plugin File: 8.1.3
Additional Context
Working Configuration (with critical side effect):
Adding scheme configuration makes file URLs work:
```
<preference name="scheme" value="app" />
<preference name="hostname" value="localhost" />
```
However, this causes complete data loss:
Then toURL() returns: app://localhost/_app_file_/... (works)
However, this causes complete data loss:
- Origin changes from null to app://localhost
- All localStorage, IndexedDB, cookies are permanently lost
- No migration path exists for user data
This creates an impossible choice:
Keep app working without scheme = No file access on iOS 26
Add scheme configuration = Lose all user data
Tested Scenarios
✅ Same code works on iOS 25 and earlier
✅ Same code works on all Android versions
❌ Manual URL conversion file:// to app:// fails (CSP error)
❌ File URLs fail in all locations (tmp, documents, cache)
Checklist
- [x] I searched for existing GitHub issues
- [x] I updated all Cordova tooling to most recent version
- [x] I included all the necessary information above
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