Bug 490327

Summary:	KDE File Picker spawned from Firefox using xdg-portals cannot submit more than 1071 files to add to an HTML file input
Product:	[Plasma] xdg-desktop-portal-kde	Reporter:	Daktyl <dakky198>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	ad.liu.jin, aleixpol
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Error message when opening large number of files

Description Daktyl 2024-07-15 21:40:24 UTC

Created attachment 171692 [details]
Error message when opening large number of files

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SUMMARY
After forcing Firefox to use xdg-portals for it's file picker, if you select more than 1071 files using an HTML input[type=files] and hit "Open", you will receive a "file cannot be found" error, with a truncated file name. Using Firefox's built-in GTK file picker I was able to submit more than 4400 files successfully.

STEPS TO REPRODUCE
1. Enable xdg-portals in Firefox by setting `widget.use-xdg-desktop-portal.file-picker` to 1
2. Navigate to any site that opens a file picker
3. Select more than 1071 files
4. Try to submit those files by clicking "Open"

OBSERVED RESULT
Error stating "the file cannot be found" with a broken file path.

EXPECTED RESULT
All selected files to be added to the HTML form for further processing.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: CachyOS
(available in About System)
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION