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netcdf > 1.6.1 does not read .netrc / .dodsrc #1299

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gauteh opened this issue Dec 12, 2023 · 4 comments · May be fixed by #1380
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netcdf > 1.6.1 does not read .netrc / .dodsrc #1299

gauteh opened this issue Dec 12, 2023 · 4 comments · May be fixed by #1380

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@gauteh
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gauteh commented Dec 12, 2023 •
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Hi,

To access CMEMS data-sources we use .netrc and .dodsrc, however it seems that versions post netcdf-1.6.1 no longer reads these files. Downgrading works fine. We use python-netcdf4 from conda-forge.

The issue seems to be present for ncdump and the likes as well.

Best regards, Gaute

Relevant issue: OpenDrift/opendrift#1083
@jswhit
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jswhit commented Dec 12, 2023

This must be due to a change in the C library, not netcdf4-python (that's why it also shows up in ncdump). I don't see anything in the netcdf-c Changelog though.

@dopplershift
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cc @WardF @DennisHeimbigner

@gauteh
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gauteh commented Dec 13, 2023

Maybe this issue: Unidata/netcdf-c#1966

@magnusuMET
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With nc_rc_set allowing one to set HTTP.NETRC we could do this automatically for more recent versions of netcdf4. There is precedent in netcdf4-python setting such options:

netcdf4-python/src/netCDF4/_netCDF4.pyx

Line 1318 in d203d8b

if nc_rc_set("HTTP.SSL.CAINFO", _strencode(certifi.where())) != 0:

@magnusuMET magnusuMET linked a pull request Oct 29, 2024 that will close this issue
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Set HTTP.NETRC if .netrc file found magnusuMET/netcdf4-python
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@gauteh @dopplershift @jswhit @magnusuMET