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https://github.com/Unidata/netcdf-c.git
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e7d5f24078
The primary change is to support the use of a zip file as a storage format. Simultaneously the .nz4 support is made obsolete Use of zip requires the libzip support library, so a number of changes to the build files (Makefile.am, CMakeLists.txt) are necessary to locate and incorporate libzip. The nczarr_tests tests are also changed to add zip testing. Other changes: * Make sure distcheck leaves no files around. * Add some functions to netcdf_aux to export some functions of libnetcdf. * Add a new error NC_EFOUND as the complement of NC_EEMPTY. * Add tracing support to nclog and use it in libnczarr. * Modify the zmap interface to support the writeonce semantics of zip. * Create a new s3util.c to support a variety of S3 auxilliary functions. * EXTERNL'ize a number of functions so they can be used in s3util. * Add support for the S3 ListObjects CommonPrefixes mechanism to improve search. * Add experimental support for running nczarr X s3 tests against the actual Amazon S3 cloud.
672 lines
20 KiB
C++
672 lines
20 KiB
C++
/*
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* Copyright 2018, University Corporation for Atmospheric Research
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* See netcdf/COPYRIGHT file for copying and redistribution conditions.
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*/
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#define NOOP
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#include "awsincludes.h"
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#include <stdlib.h>
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#include <string.h>
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#include <iostream>
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#include <streambuf>
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#include "netcdf.h"
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#include "zincludes.h"
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#include "zs3sdk.h"
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#ifdef __CYGWIN__
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extern char* strdup(const char*);
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#endif
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#define size64_t unsigned long long
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static Aws::SDKOptions zs3options;
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/* Forward */
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static Aws::S3::Model::BucketLocationConstraint s3findregion(const char* name);
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static int s3objectinfo1(const Aws::S3::Model::Object& s3_object, char** fullkeyp, size64_t* lenp);
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static int s3objectsinfo(Aws::Vector<Aws::S3::Model::Object> list, size_t*, char*** keysp, size64_t** lenp);
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static int s3commonprefixes(Aws::Vector<Aws::S3::Model::CommonPrefix> list, char*** keysp);
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static void freestringenvv(char** ss);
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static int makes3key(const char* pathkey, const char** keyp);
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static int makes3keydir(const char* prefix, char** prefixdirp);
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static char** mergekeysets(size_t nkeys1, char** keys1, size_t nkeys2, char** keys2);
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void
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NCZ_s3sdkinitialize(void)
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{
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ZTRACE(11,NULL);
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// zs3options.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Error;
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Aws::InitAPI(zs3options);
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ZUNTRACE(NC_NOERR);
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}
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void
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NCZ_s3sdkfinalize(void)
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{
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ZTRACE(11,NULL);
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Aws::ShutdownAPI(zs3options);
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ZUNTRACE(NC_NOERR);
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}
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static char*
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makeerrmsg(const Aws::Client::AWSError<Aws::S3::S3Errors> err, const char* key="")
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{
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char* errmsg;
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size_t len;
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len = strlen(err.GetExceptionName().c_str()) + strlen(err.GetMessage().c_str()) + strlen(key) + 10;
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if((errmsg = (char*)malloc(len+1))==NULL)
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return NULL;
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snprintf(errmsg,len,"%s %s key=%s",
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err.GetExceptionName().c_str(),
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err.GetMessage().c_str(),
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key);
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return errmsg;
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}
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int
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NCZ_s3sdkcreateconfig(const char* host, const char* region, void** configp)
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{
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int stat = NC_NOERR;
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ZTRACE(11,"host=%s region=%s");
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Aws::Client::ClientConfiguration *config = new Aws::Client::ClientConfiguration();
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config->scheme = Aws::Http::Scheme::HTTPS;
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config->connectTimeoutMs = 300000;
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config->requestTimeoutMs = 600000;
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if(region) config->region = region;
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if(host) config->endpointOverride = host;
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config->enableEndpointDiscovery = true;
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config->followRedirects = true;
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if(configp) * configp = config;
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return ZUNTRACE(stat);
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}
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int
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NCZ_s3sdkcreateclient(void* config0, void** clientp)
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{
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ZTRACE(11,NULL);
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Aws::Client::ClientConfiguration* config = (Aws::Client::ClientConfiguration*) config0;
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Aws::S3::S3Client *s3client
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= new Aws::S3::S3Client(*config,
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Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::RequestDependent,
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false,
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Aws::S3::US_EAST_1_REGIONAL_ENDPOINT_OPTION::NOT_SET
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);
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if(clientp) *clientp = (void*)s3client;
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return ZUNTRACE(NC_NOERR);
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}
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int
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NCZ_s3sdkbucketexists(void* s3client0, const char* bucket, int* existsp, char** errmsgp)
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{
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int stat = NC_NOERR;
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int exists = 0;
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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ZTRACE(11,"bucket=%s",bucket);
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if(errmsgp) *errmsgp = NULL;
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auto result = s3client->ListBuckets();
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if(!result.IsSuccess()) {
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if(errmsgp) *errmsgp = makeerrmsg(result.GetError());
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stat = NC_ES3;
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} else {
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Aws::Vector<Aws::S3::Model::Bucket> bucket_list = result.GetResult().GetBuckets();
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for(auto const &awsbucket : bucket_list) {
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auto name = awsbucket.GetName();
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if(name == bucket) {exists = 1; break;}
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}
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}
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if(existsp) *existsp = exists;
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return ZUNTRACEX(stat,"exists=%d",*existsp);
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}
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int
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NCZ_s3sdkbucketcreate(void* s3client0, const char* region, const char* bucket, char** errmsgp)
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{
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int stat = NC_NOERR;
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ZTRACE(11,"region=%s bucket=%s",region,bucket);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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if(errmsgp) *errmsgp = NULL;
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const Aws::S3::Model::BucketLocationConstraint &awsregion = s3findregion(region);
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if(awsregion == Aws::S3::Model::BucketLocationConstraint::NOT_SET)
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return NC_EURL;
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/* Set up the request */
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Aws::S3::Model::CreateBucketRequest create_request;
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create_request.SetBucket(bucket);
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if(region) {
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/* Specify the region as a location constraint */
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Aws::S3::Model::CreateBucketConfiguration bucket_config;
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bucket_config.SetLocationConstraint(awsregion);
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create_request.SetCreateBucketConfiguration(bucket_config);
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}
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#ifdef NOOP
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/* Create the bucket */
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auto create_result = s3client->CreateBucket(create_request);
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if(!create_result.IsSuccess()) {
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if(errmsgp) *errmsgp = makeerrmsg(create_result.GetError());
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stat = NC_ES3;;
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}
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#else
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fprintf(stderr,"create bucket: %s\n",bucket); fflush(stderr);
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#endif
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return ZUNTRACE(stat);
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}
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int
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NCZ_s3sdkbucketdelete(void* s3client0, void* config0, const char* region, const char* bucket, char** errmsgp)
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{
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int stat = NC_NOERR;
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ZTRACE(11,"region=%s bucket=%s",region,bucket);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::Client::ClientConfiguration *config = (Aws::Client::ClientConfiguration*)config0;
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if(errmsgp) *errmsgp = NULL;
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const Aws::S3::Model::BucketLocationConstraint &awsregion = s3findregion(region);
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if(awsregion == Aws::S3::Model::BucketLocationConstraint::NOT_SET)
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return NC_EURL;
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/* Set up the request */
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Aws::S3::Model::DeleteBucketRequest request;
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request.SetBucket(bucket);
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if(region) {
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config->region = region; // Will this work?
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}
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#ifdef NOOP
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/* Delete the bucket */
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auto result = s3client->DeleteBucket(request);
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if(!result.IsSuccess()) {
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if(errmsgp) *errmsgp = makeerrmsg(result.GetError());
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stat = NC_ES3;;
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}
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#else
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fprintf(stderr,"delete bucket: %s\n",bucket); fflush(stderr);
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#endif
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return ZUNTRACE(stat);
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}
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/**************************************************/
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/* Object API */
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/*
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@return NC_NOERR if key points to a content-bearing object.
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@return NC_EEMPTY if object at key has no content.
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@return NC_EXXX return true error
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*/
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int
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NCZ_s3sdkinfo(void* s3client0, const char* bucket, const char* pathkey, size64_t* lenp, char** errmsgp)
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{
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int stat = NC_NOERR;
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const char* key = NULL;
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ZTRACE(11,"bucket=%s pathkey=%s",bucket,pathkey);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::S3::Model::HeadObjectRequest head_request;
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if(*pathkey != '/') return NC_EINTERNAL;
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/* extract the true s3 key*/
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if((stat = makes3key(pathkey,&key))) return ZUNTRACE(stat);
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if(errmsgp) *errmsgp = NULL;
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head_request.SetBucket(bucket);
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head_request.SetKey(key);
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auto head_outcome = s3client->HeadObject(head_request);
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if(head_outcome.IsSuccess()) {
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long long l = head_outcome.GetResult().GetContentLength();
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if(lenp) *lenp = (size64_t)l;
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} else {
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if(lenp) *lenp = 0;
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/* Distinquish not-found from other errors */
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switch (head_outcome.GetError().GetErrorType()) {
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case Aws::S3::S3Errors::RESOURCE_NOT_FOUND:
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stat = NC_EEMPTY;
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break;
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case Aws::S3::S3Errors::ACCESS_DENIED:
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stat = NC_EACCESS;
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/* fall thru */
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default:
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if(!stat) stat = NC_ES3;
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if(errmsgp) *errmsgp = makeerrmsg(head_outcome.GetError(),key);
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break;
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}
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}
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return ZUNTRACEX(stat,"len=%d",(int)(lenp?*lenp:-1));
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}
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/*
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@return NC_NOERR if success
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@return NC_EXXX if fail
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*/
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int
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NCZ_s3sdkread(void* s3client0, const char* bucket, const char* pathkey, size64_t start, size64_t count, void* content, char** errmsgp)
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{
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int stat = NC_NOERR;
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char range[1024];
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const char* key = NULL;
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size64_t rangeend;
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ZTRACE(11,"bucket=%s pathkey=%s start=%llu count=%llu content=%p",bucket,pathkey,start,count,content);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::S3::Model::GetObjectRequest object_request;
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if(count == 0) return ZUNTRACE(stat);
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if(*pathkey != '/') return NC_EINTERNAL;
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if((stat = makes3key(pathkey,&key))) return ZUNTRACE(stat);
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object_request.SetBucket(bucket);
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object_request.SetKey(key);
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rangeend = (start+count)-1;
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snprintf(range,sizeof(range),"bytes=%llu-%llu",start,rangeend);
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object_request.SetRange(range);
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auto get_object_result = s3client->GetObject(object_request);
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if(!get_object_result.IsSuccess()) {
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if(errmsgp) *errmsgp = makeerrmsg(get_object_result.GetError(),key);
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stat = NC_ES3;
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} else {
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/* Get the whole result */
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Aws::IOStream &result = get_object_result.GetResultWithOwnership().GetBody();
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std::string str((std::istreambuf_iterator<char>(result)),std::istreambuf_iterator<char>());
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/* Verify actual result size */
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size_t slen = str.size();
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if(slen > count) return NC_ES3;
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const char* s = str.c_str();
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if(content)
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memcpy(content,s,slen);
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}
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return ZUNTRACE(stat);
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}
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/*
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For S3, I can see no way to do a byterange write;
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so we are effectively writing the whole object
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*/
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int
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NCZ_s3sdkwriteobject(void* s3client0, const char* bucket, const char* pathkey, size64_t count, const void* content, char** errmsgp)
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{
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int stat = NC_NOERR;
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const char* key = NULL;
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ZTRACE(11,"bucket=%s pathkey=%s count=%lld content=%p",bucket,pathkey,count,content);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::S3::Model::PutObjectRequest put_request;
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if(*pathkey != '/') return ZUNTRACE(NC_EINTERNAL);
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if((stat = makes3key(pathkey,&key))) return ZUNTRACE(stat);
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if(errmsgp) *errmsgp = NULL;
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put_request.SetBucket(bucket);
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put_request.SetKey(key);
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put_request.SetContentLength((long long)count);
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std::shared_ptr<Aws::IOStream> data = std::shared_ptr<Aws::IOStream>(new Aws::StringStream());
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data->rdbuf()->pubsetbuf((char*)content,count);
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put_request.SetBody(data);
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auto put_result = s3client->PutObject(put_request);
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if(!put_result.IsSuccess()) {
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if(errmsgp) *errmsgp = makeerrmsg(put_result.GetError(),key);
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stat = NC_ES3;
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}
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return ZUNTRACE(stat);
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}
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int
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NCZ_s3sdkclose(void* s3client0, void* config0, const char* bucket, const char* rootkey, int deleteit, char** errmsgp)
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{
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int stat = NC_NOERR;
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ZTRACE(11,"bucket=%s rootkey=%s deleteit=%d content=%p",bucket,rootkey,deleteit);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::Client::ClientConfiguration *config = (Aws::Client::ClientConfiguration*)config0;
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if(deleteit) {
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/* Delete the root key; ok it if does not exist */
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switch (stat = NCZ_s3sdkdeletekey(s3client0,bucket,rootkey,errmsgp)) {
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case NC_NOERR: break;
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case NC_EEMPTY: case NC_ENOTFOUND: stat = NC_NOERR; break;
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default: break;
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}
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}
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delete s3client;
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delete config;
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return ZUNTRACE(stat);
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}
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/*
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Return a list of names of legal objects immediately below a specified key.
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In theory, the returned list should be sorted in lexical order,
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but it possible that it is not.
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*/
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int
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NCZ_s3sdkgetkeys(void* s3client0, const char* bucket, const char* prefixkey0, size_t* nkeysp, char*** keysp, char** errmsgp)
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{
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int stat = NC_NOERR;
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size_t nkeys = 0;
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const char* prefix = NULL;
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char* prefixdir = NULL;
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char** realkeys = NULL;
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char** commonkeys = NULL;
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char** allkeys = NULL;
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ZTRACE(11,"bucket=%s prefixkey0=%s",bucket,prefixkey0);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::S3::Model::ListObjectsV2Request objects_request;
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if(*prefixkey0 != '/') return ZUNTRACE(NC_EINTERNAL);
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/* Make sure that the prefix ends with '/' */
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if((stat = makes3keydir(prefixkey0,&prefixdir))) return ZUNTRACE(stat);
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/* remove leading '/' */
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if((stat = makes3key(prefixdir,&prefix))) return ZUNTRACE(stat);
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if(errmsgp) *errmsgp = NULL;
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objects_request.SetBucket(bucket);
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objects_request.SetPrefix(prefix);
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objects_request.SetDelimiter("/"); /* Force return of common prefixes */
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auto objects_outcome = s3client->ListObjectsV2(objects_request);
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if(objects_outcome.IsSuccess()) {
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size_t nrealkeys = 0;
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size_t ncommonkeys = 0;
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Aws::Vector<Aws::S3::Model::Object> object_list =
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objects_outcome.GetResult().GetContents();
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nrealkeys = (size_t)object_list.size();
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stat = s3objectsinfo(object_list,NULL,&realkeys,NULL);
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/* Add common prefixes */
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Aws::Vector<Aws::S3::Model::CommonPrefix> common_list =
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objects_outcome.GetResult().GetCommonPrefixes();
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ncommonkeys = (size_t)common_list.size();
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stat = s3commonprefixes(common_list,&commonkeys);
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/* merge the two lists */
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if((allkeys=mergekeysets(nrealkeys, realkeys, ncommonkeys, commonkeys))==NULL)
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stat = NC_ENOMEM;
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if(stat == NC_NOERR) {
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if(nkeysp) {*nkeysp = nrealkeys + ncommonkeys;}
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if(keysp) {*keysp = allkeys; allkeys = NULL;}
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}
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freestringenvv(allkeys);
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freestringenvv(realkeys);
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freestringenvv(commonkeys);
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} else {
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if(errmsgp) *errmsgp = makeerrmsg(objects_outcome.GetError());
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stat = NC_ES3;
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}
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if(prefixdir) free(prefixdir);
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return ZUNTRACEX(stat,"nkeys=%u",(unsigned)*nkeysp);
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}
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/*
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Return a list of full keys of legal objects immediately below a specified key.
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Not necessarily sorted.
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*/
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int
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NCZ_s3sdksearch(void* s3client0, const char* bucket, const char* prefixkey0, size_t* nkeysp, char*** keysp, char** errmsgp)
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{
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int stat = NC_NOERR;
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size_t nkeys = 0;
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const char* prefix = NULL;
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char* prefixdir = NULL;
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char** keys = NULL;
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ZTRACE(11,"bucket=%s prefixkey0=%s",bucket,prefixkey0);
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Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
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Aws::S3::Model::ListObjectsV2Request objects_request;
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if(*prefixkey0 != '/') return ZUNTRACE(NC_EINTERNAL);
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/* Make sure that the prefix ends with '/' */
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if((stat = makes3keydir(prefixkey0,&prefixdir))) return ZUNTRACE(stat);
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/* remove leading '/' */
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if((stat = makes3key(prefixdir,&prefix))) return ZUNTRACE(stat);
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if(errmsgp) *errmsgp = NULL;
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objects_request.SetBucket(bucket);
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objects_request.SetPrefix(prefix);
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/* Do not use delimiter so we get all full key paths */
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auto objects_outcome = s3client->ListObjectsV2(objects_request);
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if(objects_outcome.IsSuccess()) {
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size_t nkeys = 0;
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Aws::Vector<Aws::S3::Model::Object> object_list =
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objects_outcome.GetResult().GetContents();
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nkeys = (size_t)object_list.size();
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if((keys=(char**)calloc(sizeof(char*),(nkeys+1)))==NULL) /* NULL terminate list */
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stat = NC_ENOMEM;
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if(!stat) {
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|
int i;
|
|
i = 0;
|
|
for (auto const &s3obj : object_list) {
|
|
const char* s;
|
|
const Aws::String& name = s3obj.GetKey();
|
|
s = name.c_str();
|
|
if(s != NULL) {
|
|
char* p;
|
|
size_t slen = name.length();
|
|
p = (char*)malloc(slen+1+1); /* nul plus leading '/' */
|
|
if(s[0] != '/') {p[0] = '/'; memcpy(p+1,s,slen); slen++;} else {memcpy(p,s,slen);}
|
|
p[slen] = '\0';
|
|
keys[i++] = p;
|
|
}
|
|
}
|
|
}
|
|
if(stat == NC_NOERR) {
|
|
if(nkeysp) {*nkeysp = nkeys;}
|
|
if(keysp) {*keysp = keys; keys = NULL;}
|
|
}
|
|
freestringenvv(keys);
|
|
} else {
|
|
if(errmsgp) *errmsgp = makeerrmsg(objects_outcome.GetError());
|
|
stat = NC_ES3;
|
|
}
|
|
if(prefixdir) free(prefixdir);
|
|
return ZUNTRACEX(stat,"nkeys=%u",(unsigned)*nkeysp);
|
|
}
|
|
|
|
int
|
|
NCZ_s3sdkdeletekey(void* s3client0, const char* bucket, const char* pathkey, char** errmsgp)
|
|
{
|
|
int stat = NC_NOERR;
|
|
const char* key = NULL;
|
|
|
|
ZTRACE(11,"bucket=%s pathkey=%s",bucket,pathkey);
|
|
|
|
Aws::S3::S3Client* s3client = (Aws::S3::S3Client*)s3client0;
|
|
Aws::S3::Model::DeleteObjectRequest delete_request;
|
|
|
|
if(*pathkey != '/') return NC_EINTERNAL;
|
|
if((stat = makes3key(pathkey,&key))) return ZUNTRACE(stat);
|
|
/* Delete this key object */
|
|
delete_request.SetBucket(bucket);
|
|
delete_request.SetKey(key);
|
|
auto delete_result = s3client->DeleteObject(delete_request);
|
|
if(!delete_result.IsSuccess()) {
|
|
if(errmsgp) *errmsgp = makeerrmsg(delete_result.GetError(),key);
|
|
stat = NC_ES3;
|
|
}
|
|
return ZUNTRACE(stat);
|
|
}
|
|
|
|
/*
|
|
Get Info about a single object from a vector
|
|
*/
|
|
static int
|
|
s3objectinfo1(const Aws::S3::Model::Object& s3_object, char** fullkeyp, size64_t* lenp)
|
|
{
|
|
int stat = NC_NOERR;
|
|
char* cstr = NULL;
|
|
|
|
if(fullkeyp) {
|
|
const char* key = NULL;
|
|
char* cstr = NULL;
|
|
auto s = s3_object.GetKey();
|
|
key = s.c_str();
|
|
if(key[0] == '/') {
|
|
cstr = strdup(key);
|
|
} else {
|
|
size_t len = strlen(key);
|
|
cstr = (char*)malloc(len+1+1);
|
|
if(cstr != NULL) {
|
|
cstr[0] = '/';
|
|
memcpy((void*)(cstr+1),(void*)key,len);
|
|
cstr[len+1] = '\0';
|
|
}
|
|
}
|
|
if(cstr == NULL) {
|
|
stat = NC_ENOMEM;
|
|
} else if(fullkeyp) {
|
|
*fullkeyp = cstr;
|
|
cstr = NULL;
|
|
}
|
|
}
|
|
if(!stat) {
|
|
if(lenp) *lenp = (size64_t)s3_object.GetSize();
|
|
}
|
|
if(cstr) free(cstr);
|
|
return stat;
|
|
}
|
|
|
|
/*
|
|
Get Info about a vector of objects; Keys are fixed up to start with a '/'
|
|
*/
|
|
static int
|
|
s3objectsinfo(Aws::Vector<Aws::S3::Model::Object> list, size_t* nkeysp, char*** keysp, size64_t** lenp)
|
|
{
|
|
int stat = NC_NOERR;
|
|
char** keys = NULL;
|
|
size_t nkeys;
|
|
size64_t *lengths = NULL;
|
|
int i;
|
|
|
|
nkeys = list.size();
|
|
if(nkeysp) *nkeysp = nkeys;
|
|
if((keys=(char**)calloc(sizeof(char*),(nkeys+1)))==NULL)
|
|
stat = NC_ENOMEM;
|
|
if(!stat) {
|
|
if((lengths=(size64_t*)calloc(sizeof(size64_t),(nkeys)))==NULL)
|
|
stat = NC_ENOMEM;
|
|
}
|
|
if(!stat) {
|
|
i = 0;
|
|
for (auto const &s3_object : list) {
|
|
stat = s3objectinfo1(s3_object,&keys[i],&lengths[i]);
|
|
i++;
|
|
if(stat) break;
|
|
}
|
|
}
|
|
if(!stat) {
|
|
if(keysp) {keys[nkeys] = NULL; *keysp = keys; keys = NULL;}
|
|
if(lenp) {*lenp = lengths; lengths = NULL;}
|
|
}
|
|
if(keys != NULL) freestringenvv(keys);
|
|
if(lengths != NULL) free(lengths);
|
|
return stat;
|
|
}
|
|
|
|
static int
|
|
s3commonprefixes(Aws::Vector<Aws::S3::Model::CommonPrefix> list, char*** keysp)
|
|
{
|
|
int stat = NC_NOERR;
|
|
char** keys = NULL;
|
|
size_t nkeys;
|
|
int i;
|
|
|
|
nkeys = list.size();
|
|
if((keys=(char**)calloc(sizeof(char*),(nkeys+1)))==NULL)
|
|
stat = NC_ENOMEM;
|
|
if(!stat) {
|
|
i = 0;
|
|
for (auto const &s3prefix : list) {
|
|
char* p; char* p1;
|
|
size_t len;
|
|
const Aws::String& prefix = s3prefix.GetPrefix();
|
|
len = prefix.length();
|
|
if((p = (char*) malloc(len+1+1))==NULL) /* for nul + leading '/' */
|
|
stat = NC_ENOMEM;
|
|
if(stat == NC_NOERR) {
|
|
if(*p == '/') {p1 = p;} else {*p = '/'; p1 = p+1;}
|
|
memcpy(p1,prefix.c_str(),len);
|
|
p1[len] = '\0';
|
|
keys[i++] = p;
|
|
}
|
|
}
|
|
}
|
|
if(keysp) {keys[nkeys] = NULL; *keysp = keys; keys = NULL;}
|
|
if(keys != NULL) freestringenvv(keys);
|
|
return stat;
|
|
}
|
|
|
|
static Aws::S3::Model::BucketLocationConstraint
|
|
s3findregion(const char* name)
|
|
{
|
|
return Aws::S3::Model::BucketLocationConstraintMapper::GetBucketLocationConstraintForName(name);
|
|
}
|
|
|
|
struct MemBuf: std::streambuf {
|
|
MemBuf(char* base, size_t size) {
|
|
char* p(base);
|
|
this->setg(p, p, p + size);
|
|
}
|
|
};
|
|
|
|
static void
|
|
freestringenvv(char** ss)
|
|
{
|
|
char** p;
|
|
if(ss != NULL) {
|
|
for(p=ss;*p;p++)
|
|
if(*p) free(*p);
|
|
free(ss);
|
|
}
|
|
}
|
|
|
|
static int
|
|
makes3key(const char* pathkey, const char** keyp)
|
|
{
|
|
assert(pathkey != NULL && pathkey[0] == '/');
|
|
if(keyp) *keyp = pathkey+1;
|
|
return NC_NOERR;
|
|
}
|
|
|
|
static int
|
|
makes3keydir(const char* prefix, char** prefixdirp)
|
|
{
|
|
size_t plen = strlen(prefix);
|
|
char* prefixdir = (char*)malloc(plen+1+1); /* '/' + nul */
|
|
if(prefixdir == NULL) return NC_ENOMEM;
|
|
memcpy(prefixdir,prefix,plen);
|
|
if(prefixdir[plen-1] != '/') {
|
|
prefixdir[plen++] = '/';
|
|
}
|
|
prefixdir[plen] = '\0';
|
|
*prefixdirp = prefixdir; prefixdir = NULL;
|
|
return NC_NOERR;
|
|
}
|
|
|
|
static char**
|
|
mergekeysets(size_t nkeys1, char** keys1, size_t nkeys2, char** keys2)
|
|
{
|
|
char** merge = NULL;
|
|
char** p1;
|
|
char** p2;
|
|
|
|
merge = (char**)malloc(sizeof(char*)*(nkeys1+nkeys2+1));
|
|
if(merge == NULL) return NULL;
|
|
if(nkeys1 > 0) {
|
|
memcpy(merge,keys1,sizeof(char*)*nkeys1);
|
|
/* avoid double free */
|
|
memset(keys1,0,sizeof(char*)*nkeys1);
|
|
}
|
|
if(nkeys2 > 0) {
|
|
memcpy(merge+nkeys1,keys2,sizeof(char*)*nkeys2);
|
|
/* avoid double free */
|
|
memset(keys2,0,sizeof(char*)*nkeys2);
|
|
}
|
|
merge[nkeys1+nkeys2] = NULL;
|
|
return merge;
|
|
}
|