[gdal-dev] How to access remote data that requires authentication?

Even Rouault even.rouault at spatialys.com
Tue Oct 5 12:10:55 PDT 2021


There are a few historically exported VSIInstaller symbols, but 
VSIInstallCurlFileHandler is never exported. None of those symbols need 
to be explicitly called as GDAL will automatically register the 
builtin-handlers. Perhaps your gdal.dll lacks curl support ? I assumed 
you pass the needed config options / env variables for that service. 
Perhaps you could try with something simpler that doesn't require 
authentication.

Le 05/10/2021 à 21:05, Joaquim Manuel Freire Luís a écrit :
>
> Even, sorry to continue this.
>
> Now is from Julia
>
> julia> 
> gdalinfo("/vsicurl/https://lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif")
>
> ERROR 4: 
> `/vsicurl/https://lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif' 
> not recognized as a supported file format.
>
> I saw a reference to VSIInstallCurlFileHandler() so I thought “right I 
> need this guy too” but when I try to install it
>
> julia> GMT.Gdal.VSIInstallCurlFileHandler()
>
> ERROR: could not load symbol "VSIInstallCurlFileHandler":
>
> The specified procedure could not be found.
>
> And indeed my gdal.dll has a couple of VSIInstaller symbols but not 
> this one (nor zip, gzip and others).
>
> Is the “not supported file format” related to this? Shouldn’t that 
> symbol be exported to the dll?
>
> *From:*gdal-dev <gdal-dev-bounces at lists.osgeo.org> *On Behalf Of 
> *Joaquim Manuel Freire Luís
> *Sent:* Tuesday, October 5, 2021 5:59 PM
> *To:* Even Rouault <even.rouault at spatialys.com>; gdal-dev at lists.osgeo.org
> *Subject:* Re: [gdal-dev] How to access remote data that requires 
> authentication?
>
> >The mention to _netrc is weird...
>
> On Windows is _netrc, not .netrc
>
> And I finally made it (twisted). The problem was that I detest where 
> MS decides is my home dir (and all the hidden dirs stuff that it puts 
> there) and always have had a home at “HOME=c:\j” and it’s there that 
> libcurl (I presume) seeks for the netrc file.
>
> Thanks for all the tips. But I still wonder how GMT manages to read 
> the file without anything of this.
>
> For the record if any other Windows user needs it
>
> gdalinfo 
> /vsicurl/https://lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif 
> --config GDAL_DISABLE_READDIR_ON_OPEN EMPTY_DIR --config 
> CPL_VSIL_CURL_USE_HEAD FALSE --config GDAL_HTTP_COOKIEFILE 
> c:/TEMP/cookies.txt --config GDAL_HTTP_COOKIEJAR c:/TEMP/cookies.txt
>
> Driver: GTiff/GeoTIFF
>
> Files: 
> /vsicurl/https://lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif
>
> Size is 3660, 3660
>
> Coordinate System is:
>
> PROJCRS["UTM Zone 10, Northern Hemisphere",
>
> Regarding authentication issues, this service is quite annoying and 
> requires enabling cookies. See 
> https://lists.osgeo.org/pipermail/gdal-dev/2021-October/054728.html 
> <https://lists.osgeo.org/pipermail/gdal-dev/2021-October/054728.html>
>
> You need to add things like /--config GDAL_HTTP_COOKIEFILE 
> /tmp/cookies.txt --config GDAL_HTTP_COOKIEJAR /tmp/cookies.txt/
>
> Le 05/10/2021 à 18:20, Joaquim Manuel Freire Luís a écrit :
>
>     OK, tried more things from that thread.
>
>     gdalinfo /vsicurl/https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-protected/HLSL30.020/HLS.L30.T10TEK.2021192T184511.v2.0/HLS.L30.T10TEK.2021192T184511.v2.0.B04.tif  <https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-protected/HLSL30.020/HLS.L30.T10TEK.2021192T184511.v2.0/HLS.L30.T10TEK.2021192T184511.v2.0.B04.tif>  --config GDAL_DISABLE_READDIR_ON_OPEN EMPTY_DIR --config CPL_CURL_VERBOSE ON --config CPL_VSIL_CURL_USE_HEAD FALSE
>
>     * Couldn't find host data.lpdaac.earthdatacloud.nasa.gov in the _netrc file; using defaults ...
>
>     OK, right it's not there.
>
>     But latter down it says
>
>     * Couldn't find host urs.earthdata.nasa.gov in the _netrc file; using defaults
>
>     Now this is not right.
>
>     < HTTP/1.1 401 Unauthorized
>
>     ...
>
>     < WWW-Authenticate: Basic realm="Please enter your Earthdata Login credentials. If you do not have a Earthdata Login, create one athttps://urs.earthdata.nasa.gov//users/new  <https://urs.earthdata.nasa.gov/users/new>"
>
>     ...
>
>     ERROR 11: HTTP response code: 401
>
>     So I'm back to the Authentication problem. I do have an _netrc file (and .netrc btw) in my home dir as well as current dir but it does seem to find it. Is there something else that I must to in order to that file be found/used?
>
>     -----Original Message-----
>
>     From: thomas bonfort<thomas.bonfort at gmail.com>  <mailto:thomas.bonfort at gmail.com>  
>
>     Sent: Tuesday, October 5, 2021 4:31 PM
>
>     To: Joaquim Manuel Freire Luís<jluis at ualg.pt>  <mailto:jluis at ualg.pt>
>
>     Subject: Re: [gdal-dev] How to access remote data that requires authentication?
>
>     for the 206 there seems to be a similar issue posted here a few days ago, search for "Problem accessing NASA Cloud Optimized GeoTIFF data"
>
>     in the archives
>
>     On Tue, Oct 5, 2021 at 5:26 PM Joaquim Manuel Freire Luís<jluis at ualg.pt>  <mailto:jluis at ualg.pt>  wrote:
>
>         you should also change your password, now you have posted it on a
>
>         public mailing list :/
>
>         Shit, thanks for spotting it.
>
>         But it doesn't work with /vsicur/ neither (had tried it  before). Now
>
>         the error is  206
>
>         gdalinfo
>
>         /vsicurl/https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected  <https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected>
>
>         /HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif
>
>         ERROR 11: HTTP response code: 206
>
>         On Tue, Oct 5, 2021 at 5:12 PM Joaquim Manuel Freire Luís<jluis at ualg.pt>  <mailto:jluis at ualg.pt>  wrote:
>
>             Hi,
>
>             I’ve read a lot of the docs, tried many -co options but can’t get through this mystery.
>
>             I can access the data through GMT, which uses GDAL to do this job,
>
>             but can’t do it with GDAL directly
>
>             gdalinfo
>
>             https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30  <https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30>
>
>             .0 15/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif
>
>             ERROR 1: HTTP error code : 401
>
>             gdalinfo failed - unable to open 'https://jluis:abaixo0Earthdata@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif  <https://jluis:abaixo0Earthdata@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30.015/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif>'.
>
>             So passing longin:password via url does not work either. But it does
>
>             if indirectly used
>
>             grdinfo
>
>             https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30  <https://user:pass@lpdaac.earthdata.nasa.gov/lp-prod-protected/HLSS30>
>
>             .0 15/HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: Title: Grid imported via
>
>             GDAL
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: Command:
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: Remark:
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: Pixel node registration
>
>             used [Cartesian grid]
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: Grid file format: gd =
>
>             Import/export through GDAL
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: x_min: 499980 x_max:
>
>             609780 x_inc: 30 name: x n_columns: 3660
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: y_min: 4390200 y_max:
>
>             4500000 y_inc: 30 name: y n_rows: 3660
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: v_min: -0.0149 v_max:
>
>             0.8833 name: z
>
>             HLS.S30.T10TEK.2020273T190109.v1.5.B8A.tif: scale_factor: 0.0001
>
>             add_offset: 0 packed z-range: [-149,8833]
>
>             +proj=utm +zone=10 +ellps=WGS84 +units=m +no_defs
>
>             Joaquim
>
>             _______________________________________________
>
>             gdal-dev mailing list
>
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>
>             https://lists.osgeo.org/mailman/listinfo/gdal-dev  <https://lists.osgeo.org/mailman/listinfo/gdal-dev>
>
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>
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>
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>
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>
> -- 
> http://www.spatialys.com  <http://www.spatialys.com>
> My software is free, but my time generally not.

-- 
http://www.spatialys.com
My software is free, but my time generally not.

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