This supports better authorization
handling for DAP requests, especially redirection
based authorization. I also added a new test case
ncdap_tests/testauth.sh.
Specifically, suppose I have a netrc file /tmp/netrc
containing this.
machine uat.urs.earthdata.nasa.gov login xxxxxx password yyyyyy
Also suppose I have a .ocrc file containing these lines
HTTP.COOKIEJAR=/tmp/cookies
HTTP.NETRC=/tmp/netrc
Assume that .ocrc is in the local directory or HOME.
Then this command should work (assuming a valid login and password).
ncdump -h "https://54.86.135.31/opendap/data/nc/fnoc1.nc"
should be under ENABLE_DAP_REMOTE_TESTS.
Fixed to make sure that this is so.
Also attempted to fix ncdap_test/CMakeLists.txt,
but probably got it wrong.
HT to Nico Schlomer.
2. Attempted to reduce the number of conversion errors
when -Wconversion is set. Fixed oc2, but
rest of netcdf remains to be done.
HT to Nico Schlomer.
3. When doing #2, I discovered an error in ncgen.y
that has remained hidden. This required some other
test case fixes.
Some servers do not properly
implement the current DAP2 spec.
It turns out that this server is one of those:
http://nomads.ncep.noaa.gov:9090/
When a reference such as this is made:
http://nomads.ncep.noaa.gov:9090/dods/gens/gens20140123/gep_all_12z?prmslmsl[0][0][0][0:359]
tt is returning this:
Dataset {
float prmslmsl[ens=1][time=1][lat=1][lon=360];
} gens%2fgens20140123%2fgep_all_12z;
when it should be returning this:
Dataset {
Structure {
float prmslmsl[ens=1][time=1][lat=1][lon=360];
} prmslmsl;
} gens%2fgens20140123%2fgep_all_12z;
The reason is that when picking fields out of a grid,
one must maintain the fully qualified name, so the grid
is converted to an enclosing structure.
It turns out that the problem was that
when I create the new structure node, I was
improperly linking it into the existing graph.
This caused a null pointer failure.
Fix is to make sure the relevant field (node->root)
is set.
