Bug report #21046: Unable to add WCS - bad error reporting - QGIS Application - QGIS Issue Tracking

Bug report #21046

Unable to add WCS - bad error reporting

Added by Jonathan Moules almost 6 years ago. Updated almost 6 years ago.

Status:	Open
Priority:	Normal
Assignee:	-
Category:	Web Services clients/WCS
Affected QGIS version:	3.4.3	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:
Crashes QGIS or corrupts data:	No	Copied to github as #:	28865

Description

Related to #21045

This WCS:
http://thredds.ucar.edu/thredds/wcs/grib/NCEP/WW3/Regional_US_West_Coast/Best

If I try and add a layer from this WCS, QGIS makes a bad request and the server response is this exception:

<?xml version="1.0" encoding="UTF-8"?>
<ServiceExceptionReport xmlns="http://www.opengis.net/ogc" version="1.2.0">
  <ServiceException code="InvalidParameterValue" locator="CRS">Request CRS [EPSG:0 [Latitude_Longitude]] not allowed [OGC:CRS84].</ServiceException>
</ServiceExceptionReport>

Except what QGIS reports is this:

  Invalid Layer : WCS provider Cannot get test dataset.
             Raster layer Provider is not valid (provider: wcs, URI: cache=PreferNetwork&crs&dpiMode=7&format=GeoTIFF_Float&identifier=Wind_speed_surface&time=2018-12-21T00:00:00Z&url=http://thredds.ucar.edu/thredds/wcs/grib/NCEP/WW3/Regional_US_West_Coast/Best

So the WCS handler doesn't seem to be correctly handling exceptions - it's passing them straight to the "Raster layer Provider" which of course barfs. Instead, the WCS error should be parsed and exposed to the user.

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