netcdf-c/include/ncs3sdk.h
Dennis Heimbigner 49737888ca Improve S3 Documentation and Support
## Improvements to S3 Documentation
* Create a new document *quickstart_paths.md* that give a summary of the legal path formats used by netcdf-c. This includes both file paths and URL paths.
* Modify *nczarr.md* to remove most of the S3 related text.
* Move the S3 text from *nczarr.md* to a new document *cloud.md*.
* Add some S3-related text to the *byterange.md* document.

Hopefully, this will make it easier for users to find the information they want.

## Rebuild NCZarr Testing
In order to avoid problems with running make check in parallel, two changes were made:
1. The *nczarr_test* test system was rebuilt. Now, for each test.
any generated files are kept in a test-specific directory, isolated
from all other test executions.
2. Similarly, since the S3 test bucket is shared, any generated S3 objects
are isolated using a test-specific key path.

## Other S3 Related Changes
* Add code to ensure that files created on S3 are reclaimed at end of testing.
* Used the bash "trap" command to ensure S3 cleanup even if the test fails.
* Cleanup the S3 related configure.ac flag set since S3 is used in several places. So now one should use the option *--enable-s3* instead of *--enable-nczarr-s3*, although the latter is still kept as a deprecated alias for the former.
* Get some of the github actions yml to work with S3; required fixing various test scripts adding a secret to access the Unidata S3 bucket.
* Cleanup S3 portion of libnetcdf.settings.in and netcdf_meta.h.in and test_common.in.
* Merge partial S3 support into dhttp.c.
* Create an experimental s3 access library especially for use with Windows. It is enabled by using the options *--enable-s3-internal* (automake) or *-DENABLE_S3_INTERNAL=ON* (CMake). Also add a unit-test for it.
* Move some definitions from ncrc.h to ncs3sdk.h

## Other Changes
* Provide a default implementation of strlcpy and move this and similar defaults into *dmissing.c*.
2023-04-25 17:15:06 -06:00

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C

/*
* Copyright 2018, University Corporation for Atmospheric Research
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*/
#ifndef NCS3SDK_H
#define NCS3SDK_H 1
typedef struct NCS3INFO {
char* host; /* non-null if other*/
char* region; /* region */
char* bucket; /* bucket name */
char* rootkey;
char* profile;
} NCS3INFO;
#ifdef __cplusplus
extern "C" {
#endif
EXTERNL int NC_s3sdkinitialize(void);
EXTERNL int NC_s3sdkfinalize(void);
EXTERNL void* NC_s3sdkcreateclient(NCS3INFO* context);
EXTERNL int NC_s3sdkbucketexists(void* s3client, const char* bucket, int* existsp, char** errmsgp);
EXTERNL int NC_s3sdkbucketcreate(void* s3client, const char* region, const char* bucket, char** errmsgp);
EXTERNL int NC_s3sdkbucketdelete(void* s3client, NCS3INFO* info, char** errmsgp);
EXTERNL int NC_s3sdkinfo(void* client0, const char* bucket, const char* pathkey, unsigned long long* lenp, char** errmsgp);
EXTERNL int NC_s3sdkread(void* client0, const char* bucket, const char* pathkey, unsigned long long start, unsigned long long count, void* content, char** errmsgp);
EXTERNL int NC_s3sdkwriteobject(void* client0, const char* bucket, const char* pathkey, unsigned long long count, const void* content, char** errmsgp);
EXTERNL int NC_s3sdkclose(void* s3client0, NCS3INFO* info, int deleteit, char** errmsgp);
EXTERNL int NC_s3sdkgetkeys(void* s3client0, const char* bucket, const char* prefix, size_t* nkeysp, char*** keysp, char** errmsgp);
EXTERNL int NC_s3sdksearch(void* s3client0, const char* bucket, const char* prefixkey0, size_t* nkeysp, char*** keysp, char** errmsgp);
EXTERNL int NC_s3sdkdeletekey(void* client0, const char* bucket, const char* pathkey, char** errmsgp);
EXTERNL const char* NC_s3dumps3info(NCS3INFO* info);
/* From ds3util.c */
EXTERNL int NC_getdefaults3region(NCURI* uri, const char** regionp);
EXTERNL int NC_s3urlprocess(NCURI* url, NCS3INFO* s3);
EXTERNL int NC_s3clear(NCS3INFO* s3);
EXTERNL int NC_s3clone(NCS3INFO* s3, NCS3INFO** news3p);
#ifdef __cplusplus
}
#endif
#endif /*NCS3SDK_H*/