Cannot Add VPC as a pointcloud layer via the Add Layer dialog - only by drag-dropping onto the UI

[jo-chemla]

What is the bug or the crash?

Loading vpc via the Add Layer UI dialog is not possible and throws error that only ept.json and COPC are supported. Loading the same VPC by drag-dropping it into the QGIS UI works great.

The bug probably originates from this too-conservative check which only verifies whether the input file or http url ends with ept.json or .copc.laz

QGIS/src/gui/providers/qgspointcloudsourceselect.cpp

Lines 98 to 102 in 98e89dc

	if ( fileName.compare( QLatin1String( "ept.json" ), Qt::CaseInsensitive ) != 0 && !fileName.endsWith( QLatin1String( ".copc.laz" ), Qt::CaseInsensitive ) )
	{
	QMessageBox::information( this, tr( "Add Point Cloud Layers" ), tr( "Invalid point cloud URL \"%1\", please make sure your URL ends with /ept.json or .copc.laz" ).arg( mPath ) );
	return;
	}

Maybe the question is addressed towards Lutra, eg @saberraz

Steps to reproduce the issue

1. Go to Layer - Add Layer - Add Pointcloud Layer
2. Either use the url or downloaded vpc file https://www.lutraconsulting.co.uk/downloads/ign-chambery.vpc
3. Results in Invalid point cloud URL "https://www.lutraconsulting.co.uk/downloads/ign-chambery.vpc", please make sure your URL ends with /ept.json or .copc.laz
4. If you drag-and-drop the vpc file instead, then Qgis loads it perfectly fine.

Versions

QGIS version	3.40.1-Bratislava
QGIS code revision	989853a7
Libraries
Qt version	5.15.13
Python version	3.12.7
GDAL/OGR version	3.9.3
PROJ version	9.5.0
EPSG Registry database version	v11.016 (2024-08-31)
GEOS version	3.13.0-CAPI-1.19.0
SQLite version	3.46.1
PDAL version	2.8.1
PostgreSQL client version	16.2
SpatiaLite version	5.1.0
QWT version	6.3.0
QScintilla2 version	2.14.1
OS version	Windows 11 Version 2009
Active Python plugins
FreehandRasterGeoreferencer	0.8.3
JSONEater-master	0.3
latlontools	3.6.19
menu_from_project	2.1.0
qgis-maptiler-plugin	3.3.2
QuickOSM	2.2.3
quick_map_services	0.19.34
db_manager	0.1.20
MetaSearch	0.3.6
processing	2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response