Commit Graph

10 Commits

Author SHA1 Message Date
Dennis Heimbigner
8ceafa62d4 Improve operation of the DAP4 code and fix bugs
re: e-support EOT-483791

* Add a new set of remote tests based on using the thredds-test server.
* Improve error reporting when server requests fail.
* Fix handing of _NCProperties attribute
2021-05-21 20:46:56 -06:00
Dennis Heimbigner
97ce621091 Improve operation of the DAP4 code and fix bugs
re: esupport 31942

* Add a new set of remote tests based on using the opendap hyrax server
* Re-enable --enable-dap-remote-tests as default on
* Make it possible to query the DMR separate from the DAP
  so that it is possible to delay reading data until it is actually
  requested. This make things like ncdump -h much more efficient.
* Fix handling of <Map>s in DMRs.
* Fix some memory leaks
2021-01-14 21:39:08 -07:00
Dennis Heimbigner
65414eeaa4 Fix some protocol differences between netcdf-c and the Hyrax server.
re: Partly addresses issue https://github.com/Unidata/netcdf-c/issues/1712.

1. Turn on Hyrax Hack to accept Hyrax style attribute containers.
2. Support Url type as alias for String.
3. Accept the special attribute, "__DAP4_Checksum_CRC32",
   to control per-variable checksums.
4. Make _DAP4_xxx attributes be reserved and only accessible
   by name (ala _SuperBlock attribute).
5. Fix handling of checksums. There is a hack in the code
   that uses an extra flag in the chunk header to indicate
   that all variables have checksums. This violates the spec
   and will be removed once it is possible to regenerate the
   test cases.

Note that checksumming with the Hyrax test server has not
been tested. This, along with some other probable inconsistencies,
needs fixing when OPeNDAP and Unidata can agree on the proper
specification. Testing will be included.
2020-05-30 17:36:25 -06:00
Dennis Heimbigner
6934aa2e8b Thread safety: step 1: cleanup
re: https://github.com/Unidata/netcdf-c/issues/1373 (partial)

* Mark some global constants be const to indicate to make them easier to track.
* Hide direct access to the ncrc_globalstate behind a function call.
* Convert dispatch tables to constants (except the user defined ones)
  This has some consequences in terms of function arguments needing to be marked
  as const also.
* Remove some no longer needed global fields
* Aggregate all the globals in nclog.c
* Uniformly replace nc_sizevector{0,1} with NC_coord_{zero,one}
* Uniformly replace nc_ptrdffvector1 with NC_stride_one
* Remove some obsolete code
2019-03-30 14:06:20 -06:00
Dennis Heimbigner
c59d5ce205 Fix handling of '/' characters in names in DAP2.
re: https://github.com/Unidata/thredds/issues/1224
[note that this is an issue in thredds, but the fix is in netcdf-c]

A thredds server can encode a netcdf-4 file into DAP2
by flattening names to include the containing group path,
where the group names are separated by '/'.

But the '/' is prohibited in netcdf names even if escaped
(a decision before my time).

So, if the netcdf-c/libdap2 code encounters a DAP2 name with '/'
characters, the '/' characters are converted to the string
%2f. Unfortunately, there is a glitch, namely that converting
the leading '/' produces a name that is still illegal. This PR
modifies the code to just drop the leading '/' character.
2019-02-14 20:25:40 -07:00
Ward Fisher
72d56fb601 Updated copyright stanza in libdap4 2018-12-06 14:24:28 -07:00
Dennis Heimbigner
245961de00 re: github issues
https://github.com/Unidata/netcdf-c/issues/1168
    https://github.com/Unidata/netcdf-c/issues/1163
    https://github.com/Unidata/netcdf-c/issues/1162

This PR partially fixes memory leaks in the netcdf-c library,
in the ncdump utility, and in some test cases.

The netcdf-c library now runs memory clean with the assumption
that the --disable-utilities option is used. The primary remaining
problem is ncgen. Once that is fixed, I believe the netcdf-c library
will run memory clean with no limitations.

Notes
-----------
1. Memory checking was performed using gcc -fsanitize=address.
   Valgrind-based testing has yet to be performed.
2. The pnetcdf, hdf4, and examples code has not been tested.

Misc. Non-leak changes
1. Make tst_diskless2 only run when netcdf4 is enabled (issue 1162)
2. Fix CmakeLists.txt to turn off logging if ENABLE_NETCDF_4 is OFF
3. Isolated all my debug scripts into a single top-level directory
   called debug
4. Fix some USE_NETCDF4 dependencies in nc_test and nc_test4 Makefile.am
2018-10-30 20:48:12 -06:00
Dennis Heimbigner
727b613459 This is the initial step in moving to the new higher performance
(I hope) metadata mechanism. This mostly just adds new pieces of
code (e.g. nclistmap) and does some minor fixes.

It should be transparent to everything else.
The next set of changes will be the big step.
2018-02-08 19:53:40 -07:00
Ed Hartnett
0fbfc2bce4 more warnings 2017-11-30 09:16:29 -07:00
Dennis Heimbigner
3db4f013bf Primary change: add dap4 support
Specific changes:
1. Add dap4 code: libdap4 and dap4_test.
   Note that until the d4ts server problem is solved, dap4 is turned off.
2. Modify various files to support dap4 flags:
	configure.ac, Makefile.am, CMakeLists.txt, etc.
3. Add nc_test/test_common.sh. This centralizes
   the handling of the locations of various
   things in the build tree: e.g. where is
   ncgen.exe located. See nc_test/test_common.sh
   for details.
4. Modify .sh files to use test_common.sh
5. Obsolete separate oc2 by moving it to be part of
   netcdf-c. This means replacing code with netcdf-c
   equivalents.
5. Add --with-testserver to configure.ac to allow
   override of the servers to be used for --enable-dap-remote-tests.
6. There were multiple versions of nctypealignment code. Try to
   centralize in libdispatch/doffset.c and include/ncoffsets.h
7. Add a unit test for the ncuri code because of its complexity.
8. Move the findserver code out of libdispatch and into
   a separate, self contained program in ncdap_test and dap4_test.
9. Move the dispatch header files (nc{3,4}dispatch.h) to
   .../include because they are now shared by modules.
10. Revamp the handling of TOPSRCDIR and TOPBUILDDIR for shell scripts.
11. Make use of MREMAP if available
12. Misc. minor changes e.g.
	- #include <config.h> -> #include "config.h"
	- Add some no-install headers to /include
	- extern -> EXTERNL and vice versa as needed
	- misc header cleanup
	- clean up checking for misc. unix vs microsoft functions
13. Change copyright decls in some files to point to LICENSE file.
14. Add notes to RELEASENOTES.md
2017-03-08 17:01:10 -07:00