Add the ability to set some additional curlopt values via .daprc (aka .dodsrc).
This effects both DAP2 and DAP4 protocols.
Related issues:
[1] re: esupport: KOZ-821332
[2] re: github issue https://github.com/Unidata/netcdf4-python/issues/836
[3] re: github issue https://github.com/Unidata/netcdf-c/issues/1074
1. CURLOPT_BUFFERSIZE: Relevant to [1]. Allow user to set the read/write
buffersizes used by curl.
This is done by adding the following to .daprc (aka .dodsrc):
HTTP.READ.BUFFERSIZE=n
where n is the buffersize in bytes. There is a built-in (to curl)
limit of 512k for this value.
2. CURLOPT_TCP_KEEPALIVE (and CURLOPT_TCP_KEEPIDLE and CURLOPT_TCP_KEEPINTVL):
Relevant (maybe) to [2] and [3]. Allow the user to turn on KEEPALIVE
This is done by adding the following to .daprc (aka .dodsrc):
HTTP.KEEPALIVE=on|n/m
If the value is "on", then simply enable default KEEPALIVE. If the value
is n/m, then enable KEEPALIVE and set KEEPIDLE to n and KEEPINTVL to m.
The use of the following version-specific curl flags
is not always properly wrapped or aliased using
config.h HAVE_CURL... ifdefs.
# CURLOPT_USERNAME is not defined until curl version 7.19.1
# CURLOPT_PASSWORD is not defined until curl version 7.19.1
# CURLOPT_KEYPASSWD is not defined until curl version 7.16.4
-- aliased as needed to CURLOPT_SSLKEYPASSWD
# CURLINFO_RESPONSE_CODE is not defined until curl version 7.10.7
-- aliased as needed to CURLINFO_HTTP_CODE
# CURLOPT_CHUNK_BGN_FUNCTION is not defined until curl version 7.21.0
-- not used in our code
generates garbage. This in turn interferes with using .netrc
because the garbage user+pwd can will override the
.netrc. Note that this may work ok sometimes
if the garbage happens to start with a nul character.
2. It turns out that the user:pwd combination needs to support
character escaping. One reason is the user may contain an '@' character.
The other is that modern password rules make it not unlikely that
the password will contain characters that interfere with url parsing.
So, the rule I have implemented is that all occurrences of the user:pwd
format must escape any dodgy characters. The escape format is URL escaping
of the form %XX. This applies both to user:pwd
embedded in a URL as well as the use of HTTP.CREDENTIALS.USERPASSWORD
in a .dodsrc/.daprc file. The user and password in .netrc must not
be escaped. This is now documented in docs/auth.md
The fix for #2 actually obviated #1. Now, internally, the user and pwd
are stored separately and not in the user:pwd format. They are combined
(and escaped) only when needed.
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
