problem with json format

[lucadelu]

I found a bug using json file, it is possible to replicate converting lake.gml of Alaska dataset in GeoJSON format using ogr2ogr. The returned error is:

Traceback (most recent call last):
File "/home/lucadelu/.qgis2/python/plugins/rt_mapserver_exporter/mapfileexportdlg.py", line 353, in accept
if mapscript.MS_SUCCESS != ms_layer.applySLD( sldContents, ms_layer.name ):
IOError: msShapefileOpen(): Unable to access file. (/home/lucadelu/geodati/qgis_sample_data/gml/lakes.json)
msShapefileOpen(): Unable to access file. (/home/lucadelu/geodati/qgis_sample_data/gml/lakes.json)

[luipir]

confirmed

exceprion is generated by mapscript call applySLD generating a IOError exception without other information.
SLD creation by qgis call works fine, error is in mapscript code.
I'm investigating it.

thenks for the report

[luipir]

SLD generated before mapscript call applySLD:

https://gist.github.com/6139610.git

[luipir]

error come from this piece of code added as preliminary patch in mapscript
MapServer/MapServer#3114
it works only with shapefile.
in mapogcsld.c:259 the call msLayerOpen(GET_LAYER(map, i)) set ms_error that is not reset after exit this call => wrapper receive MS_SUCCESS as result but still find a ms_error set rising the exception

should be managed by mapscript team

[luipir]

wrote a report in the mapserver-dev list:

---

hi mapscript

I've a IOError generarted by applySLD call applying this SLD: https://gist.github.com/luipir/6139610

debugging msSLDApplySLD call I found that it exit with the last line mapogcsld.c:479 - return MS_SUCCESS;

but an error code returned by python wrapper: _wrap_layerObj_applySLD
to be precise the call:

errorObj *ms_error = msGetErrorObj();

returns:

ms_error->code = 1
ms_error.routine = "msShapeFileOpen()"
ms_error->message=(/mnt/data/PROGRAMMING/FAUNALIA/qgis-plugins/PLUGIN_TEST_DATA/rt_mapserver_exporter/singlejson_alphatest_data/lakes.json)...
ms_error->isreported=0

then wrapper scan ms_error-> code and return error to python... but applySLD was succesful!

seems related to a preliminary patch: MapServer/MapServer#3114 applied one years ago
that piece of code work only with shapefile

I think it could be managed refining the code before applying the above preliminary patch

thanks Luigi Pirelli (luigi.pirelli@faunalia.it)