VSIZIP returns that range download is not supported in some cases

[manuelgrizonnet]

I am not sure if there is a problem in gdal or if this is related to a limitation of the usgs server but I've got a strange behaviour trying to access remote zip files through gdal.

On the same server and in the same directory 2 gdalinfo commands which access different zip files behave differently

In one case this command works without problem:

gdalinfo /vsizip/vsicurl/​http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/Eurasia/N00E072.hgt.zip/N00E072.hgt

but this command fails:

gdalinfo /vsizip/vsicurl/​http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/Eurasia/N43E001.hgt.zip/N43E001.hgt

In both cases the files exist on the server and I'm able to download them.

It returns "ERROR 1: Range downloading not supported by this server" !

It seems weird that there is server limitation on some specific files inside the same directory.

Manuel

[jmalik]

works for me.

also not specifying the internal file works : gdalinfo /vsizip/vsicurl/​http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/Eurasia/N43E001.hgt.zip

[Even Rouault]

Both links work for me too. I suppose you have some network problems on your side (no proxy ?), or it was a temporary misfunction of the USGS server. Or it might come from the particular libcurl version you are using (although I'm not using a particularly recent one, 7.19.7)

[manuelgrizonnet]

If it works or your side I suppose that it is related to my network and the proxy.

FYI, I'm using libcurl 7.22.0

Thanks for the answer.