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netcdf-c/libdispatch/ncs3sdk_aws.cpp

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/*
* Copyright 2018, University Corporation for Atmospheric Research
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*/
/* WARNING: changes to this file may need to be propagated to libsrc/s3sdk.cpp */
#undef DEBUG
/* Use Aws::Transfer instead of direct REST API */
#undef TRANSFER
/* Disable bucket creation/deletion */
#define NOOPBUCKET
#include "awsincludes.h"
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <streambuf>
#include "netcdf.h"
#include "ncrc.h"
#ifdef TRANSFER
#include <aws/core/utils/memory/AWSMemory.h>
#include <aws/core/utils/memory/stl/AWSStreamFwd.h>
#include <aws/core/utils/stream/PreallocatedStreamBuf.h>
#include <aws/transfer/TransferManager.h>
#include <aws/transfer/TransferHandle.h>
#endif
#include "ncs3sdk.h"
#undef NCTRACING
#ifdef NCTRACING
#define NCTRACE(level,fmt,...) nctrace((level),__func__,fmt,##__VA_ARGS__)
#define NCTRACEMORE(level,fmt,...) nctracemore((level),fmt,##__VA_ARGS__)
#define NCUNTRACE(e) ncuntrace(__func__,THROW(e),NULL)
#define NCUNTRACEX(e,fmt,...) ncuntrace(__func__,THROW(e),fmt,##__VA_ARGS__)
#define NCUNTRACENOOP(e) NCUNTRACE(e)
#else
#define NCTRACE(level,fmt,...)
#define NCTRACEMORE(level,fmt,...)
#define NCUNTRACE(e) (e)
#define NCUNTRACEX(e,fmt,...) (e)
#define NCUNTRACENOOP(e)
#endif
#ifdef __CYGWIN__
extern char* strdup(const char*);
#endif
#define size64_t unsigned long long
#ifdef TRANSFER
#define AWSS3CLIENT std::shared_ptr<Aws::S3::S3Client>*
#define AWSS3GET(x) (((AWSS3CLIENT)(x))->get())
#else
#define AWSS3CLIENT Aws::S3::S3Client*
#define AWSS3GET(x) ((AWSS3CLIENT)(x))
#endif
struct KeySet {
size_t nkeys;
size_t alloc;
char** keys;
KeySet() {nkeys = 0; alloc = 0; keys = NULL;}
~KeySet() {clear();}
void push(char* key) {
if(alloc == 0) {
keys = (char**)calloc(10,sizeof(char*));
alloc = 10;
}
if(nkeys >= alloc) {
char** newkeys = (char**)calloc(alloc*2,sizeof(char*));
memcpy(newkeys,keys,sizeof(char*)*nkeys);
alloc *= 2;
free(keys);
keys = newkeys;
}
keys[nkeys++] = key;
}
char** extractkeys() {char** outkeys = keys; keys = NULL; clear(); return outkeys;}
char* extractithkey(size_t i) {
if(i >= nkeys) return NULL;
char* k = keys[i];
keys[i] = NULL;
return k;
}
size_t getnkeys() {return nkeys;}
void clear() {
if(keys) {
for(size_t i=0;i<nkeys;i++)
{if(keys[i] != NULL) free(keys[i]);}
free(keys);
}
nkeys = 0;
alloc = 0;
keys = NULL;
}
};
static int ncs3_initialized = 0;
static int ncs3_finalized = 0;
static Aws::SDKOptions ncs3options;
/* Forward */
static Aws::S3::Model::BucketLocationConstraint s3findregion(const char* name);
static int s3objectinfo1(const Aws::S3::Model::Object& s3_object, char** fullkeyp);
static int s3objectsinfo(Aws::Vector<Aws::S3::Model::Object> list, KeySet* keys);
static int s3commonprefixes(Aws::Vector<Aws::S3::Model::CommonPrefix> list, KeySet* keys);
static int makes3key(const char* pathkey, const char** keyp);
static int makes3keydir(const char* prefix, char** prefixdirp);
static int mergekeysets(KeySet* keys1, KeySet* keys2, KeySet* merge);
const char*
NCS3_dumps3info(NCS3INFO* info)
{
static char text[8192];
snprintf(text,sizeof(text),"host=%s region=%s bucket=%s rootkey=%s profile=%s",
(info->host?info->host:"null"),
(info->region?info->region:"null"),
(info->bucket?info->bucket:"null"),
(info->rootkey?info->rootkey:"null"),
(info->profile?info->profile:"null"));
return text;
}
EXTERNL int
NC_s3sdkinitialize(void)
{
if(!ncs3_initialized) {
ncs3_initialized = 1;
ncs3_finalized = 0;
#ifdef DEBUG
//ncs3options.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Debug;
ncs3options.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Trace;
ncs3options.httpOptions.installSigPipeHandler = true;
ncs3options.loggingOptions.logger_create_fn = [] { return std::make_shared<Aws::Utils::Logging::ConsoleLogSystem>(Aws::Utils::Logging::LogLevel::Trace); };
#endif
Aws::InitAPI(ncs3options);
}
return NCUNTRACE(NC_NOERR);
}
EXTERNL int
NC_s3sdkfinalize(void)
{
if(!ncs3_finalized) {
ncs3_initialized = 0;
ncs3_finalized = 1;
NCTRACE(11,NULL);
Aws::ShutdownAPI(ncs3options);
}
return NCUNTRACE(NC_NOERR);
}
static char*
makeerrmsg(const Aws::Client::AWSError<Aws::S3::S3Errors> err, const char* key="")
{
char* errmsg;
size_t len;
len = strlen(err.GetExceptionName().c_str()) + strlen(err.GetMessage().c_str()) + strlen(key) + 10;
if((errmsg = (char*)malloc(len+1))==NULL)
return NULL;
snprintf(errmsg,len,"%s %s key=%s",
err.GetExceptionName().c_str(),
err.GetMessage().c_str(),
key);
return errmsg;
}
static Aws::Client::ClientConfiguration
s3sdkcreateconfig(NCS3INFO* info)
{
NCTRACE(11,"info=%s", dumps3info(info));
Aws::Client::ClientConfiguration config;
if(info->profile)
config.profileName = info->profile;
config.scheme = Aws::Http::Scheme::HTTPS;
//config.connectTimeoutMs = 1000;
//config.requestTimeoutMs = 0;
config.connectTimeoutMs = 300000;
config.requestTimeoutMs = 600000;
if(info->region) config.region = info->region;
if(info->host) config.endpointOverride = info->host;
config.enableEndpointDiscovery = true;
config.followRedirects = Aws::Client::FollowRedirectsPolicy::ALWAYS;
NCUNTRACENOOP(NC_NOERR);
return config;
}
static AWSS3CLIENT
buildclient(Aws::Client::ClientConfiguration* config, Aws::Auth::AWSCredentials* creds)
{
AWSS3CLIENT s3client = NULL;
#ifdef TRANSFER
std::shared_ptr<Aws::S3::S3Client> client;
if(creds != NULL) {
client = Aws::MakeShared<Aws::S3::S3Client>("S3Client",*creds,*config,
Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::RequestDependent,
false);
} else {
client = Aws::MakeShared<Aws::S3::S3Client>("S3Client",*config,
Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::RequestDependent,
false);
}
// Create allocated client space
s3client = new std::shared_ptr<Aws::S3::S3Client>;
*s3client = client;
#else
if(creds != NULL) {
s3client = new Aws::S3::S3Client(*creds,*config,
Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::RequestDependent,
false);
} else {
s3client = new Aws::S3::S3Client(*config,
Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::RequestDependent,
false);
}
#endif
return s3client;
}
EXTERNL void*
NC_s3sdkcreateclient(NCS3INFO* info)
{
NCTRACE(11,NULL);
Aws::Client::ClientConfiguration config = s3sdkcreateconfig(info);
AWSS3CLIENT s3client;
if(info->profile == NULL || strcmp(info->profile,"none")==0) {
Aws::Auth::AWSCredentials creds;
creds.SetAWSAccessKeyId(Aws::String(""));
creds.SetAWSSecretKey(Aws::String(""));
s3client = buildclient(&config,&creds);
} else {
s3client = buildclient(&config,NULL);
}
// delete config;
NCUNTRACENOOP(NC_NOERR);
return (void*)s3client;
}
EXTERNL int
NC_s3sdkbucketexists(void* s3client0, const char* bucket, int* existsp, char** errmsgp)
{
int stat = NC_NOERR;
int exists = 0;
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
NCTRACE(11,"bucket=%s",bucket);
if(errmsgp) *errmsgp = NULL;
#if 0
char* errmsg = NULL;
auto result = s3client->ListBuckets();
if(!result.IsSuccess()) {
auto re = result.GetError();
errmsg = makeerrmsg(re);
fprintf(stderr,">>> errmsg=%s\n",errmsg);
if(errmsgp) {*errmsgp = errmsg; errmsg = NULL;}
stat = NC_ES3;
} else {
Aws::Vector<Aws::S3::Model::Bucket> bucket_list = result.GetResult().GetBuckets();
for(auto const &awsbucket : bucket_list) {
auto name = awsbucket.GetName();
if(name == bucket) {exists = 1; break;}
}
}
#else
Aws::S3::Model::HeadBucketRequest request;
request.SetBucket(bucket);
auto result = AWSS3GET(s3client)->HeadBucket(request);
exists = result.IsSuccess() ? 1 : 0;
#endif
if(existsp) *existsp = exists;
return NCUNTRACEX(stat,"exists=%d",*existsp);
}
EXTERNL int
NC_s3sdkbucketcreate(void* s3client0, const char* region, const char* bucket, char** errmsgp)
{
int stat = NC_NOERR;
NCTRACE(11,"region=%s bucket=%s",region,bucket);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
if(errmsgp) *errmsgp = NULL;
const Aws::S3::Model::BucketLocationConstraint &awsregion = s3findregion(region);
if(awsregion == Aws::S3::Model::BucketLocationConstraint::NOT_SET)
return NC_EURL;
/* Set up the request */
Aws::S3::Model::CreateBucketRequest create_request;
create_request.SetBucket(bucket);
if(region) {
/* Specify the region as a location constraint */
Aws::S3::Model::CreateBucketConfiguration bucket_config;
bucket_config.SetLocationConstraint(awsregion);
create_request.SetCreateBucketConfiguration(bucket_config);
}
#ifdef NOOPBUCKET
/* Create the bucket */
auto create_result = AWSS3GET(s3client)->CreateBucket(create_request);
if(!create_result.IsSuccess()) {
if(errmsgp) *errmsgp = makeerrmsg(create_result.GetError());
stat = NC_ES3;;
}
#else
fprintf(stderr,"create bucket: %s\n",bucket); fflush(stderr);
#endif
return NCUNTRACE(stat);
}
EXTERNL int
NC_s3sdkbucketdelete(void* s3client0, NCS3INFO* info, char** errmsgp)
{
int stat = NC_NOERR;
NCTRACE(11,"info=%s%s",dumps3info(info));
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
if(errmsgp) *errmsgp = NULL;
const Aws::S3::Model::BucketLocationConstraint &awsregion = s3findregion(info->region);
if(awsregion == Aws::S3::Model::BucketLocationConstraint::NOT_SET)
return NC_EURL;
/* Set up the request */
Aws::S3::Model::DeleteBucketRequest request;
request.SetBucket(info->bucket);
#ifdef NOOPBUCKET
/* Delete the bucket */
auto result = AWSS3GET(s3client)->DeleteBucket(request);
if(!result.IsSuccess()) {
if(errmsgp) *errmsgp = makeerrmsg(result.GetError());
stat = NC_ES3;;
}
#else
fprintf(stderr,"delete bucket: %s\n",bucket); fflush(stderr);
#endif
return NCUNTRACE(stat);
}
/**************************************************/
/* Object API */
/*
@return NC_NOERR if key points to a content-bearing object.
@return NC_EEMPTY if object at key has no content.
@return NC_EXXX return true error
*/
EXTERNL int
NC_s3sdkinfo(void* s3client0, const char* bucket, const char* pathkey, size64_t* lenp, char** errmsgp)
{
int stat = NC_NOERR;
const char* key = NULL;
NCTRACE(11,"bucket=%s pathkey=%s",bucket,pathkey);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
Aws::S3::Model::HeadObjectRequest head_request;
if(*pathkey != '/') return NC_EINTERNAL;
/* extract the true s3 key*/
if((stat = makes3key(pathkey,&key))) return NCUNTRACE(stat);
if(errmsgp) *errmsgp = NULL;
head_request.SetBucket(bucket);
head_request.SetKey(key);
auto head_outcome = AWSS3GET(s3client)->HeadObject(head_request);
if(head_outcome.IsSuccess()) {
long long l = head_outcome.GetResult().GetContentLength();
if(lenp) *lenp = (size64_t)l;
} else {
if(lenp) *lenp = 0;
/* Distinquish not-found from other errors */
switch (head_outcome.GetError().GetErrorType()) {
case Aws::S3::S3Errors::RESOURCE_NOT_FOUND:
stat = NC_EEMPTY;
break;
case Aws::S3::S3Errors::ACCESS_DENIED:
stat = NC_EACCESS;
/* fall thru */
default:
if(!stat) stat = NC_ES3;
if(errmsgp) *errmsgp = makeerrmsg(head_outcome.GetError(),key);
break;
}
}
return NCUNTRACEX(stat,"len=%d",(int)(lenp?*lenp:-1));
}
/**
* In-memory stream implementations
*/
class DownLoadStream : public Aws::IOStream
{
public:
using Base = Aws::IOStream;
// Provide a customer-controlled streambuf to hold data from the bucket.
explicit DownLoadStream(std::streambuf* buf) : Base(buf) {}
~DownLoadStream() override = default;
};
class UpLoadStream : public Aws::IOStream
{
public:
using Base = Aws::IOStream;
// Provide a customer-controlled streambuf to hold data from the bucket.
explicit UpLoadStream(std::streambuf* buf) : Base(buf) {}
~UpLoadStream() override = default;
};
/*
@return NC_NOERR if success
@return NC_EXXX if fail
*/
EXTERNL int
NC_s3sdkread(void* s3client0, const char* bucket, const char* pathkey, size64_t start, size64_t count, void* content, char** errmsgp)
{
int stat = NC_NOERR;
const char* key = NULL;
NCTRACE(11,"bucket=%s pathkey=%s start=%llu count=%llu content=%p",bucket,pathkey,start,count,content);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
if(count == 0) return NCUNTRACE(stat);
if(errmsgp) *errmsgp = NULL;
if(*pathkey != '/') return NC_EINTERNAL;
if((stat = makes3key(pathkey,&key))) return NCUNTRACE(stat);
#ifdef TRANSFER
auto executor = Aws::MakeShared<Aws::Utils::Threading::PooledThreadExecutor>("executor", 25);
Aws::Transfer::TransferManagerConfiguration transfer_config(executor.get());
transfer_config.s3Client = *s3client;
// The local variable downloadBuffer' is captured by reference in a lambda.
// It must persist until all downloading by the 'transfer_manager' is complete.
Aws::Utils::Stream::PreallocatedStreamBuf downloadBuffer((unsigned char*)content, count - start);
auto transfer_manager = Aws::Transfer::TransferManager::Create(transfer_config);
auto creationFunction = [&downloadBuffer]() { //Define a lambda expression for the callback method parameter to stream back the data.
return Aws::New<DownLoadStream>("downloadHandle", &downloadBuffer);};
auto downloadHandle = transfer_manager->DownloadFile(bucket, key, start, count, creationFunction);
downloadHandle->WaitUntilFinished();
bool success = downloadHandle->GetStatus() == Aws::Transfer::TransferStatus::COMPLETED;
if (!success) {
auto err = downloadHandle->GetLastError();
if(errmsgp) *errmsgp = makeerrmsg(err,key);
stat = NC_ES3;
} else {
size64_t transferred = downloadHandle->GetBytesTransferred();
size64_t totalsize = downloadHandle->GetBytesTotalSize();
assert(count == totalsize && transferred == totalsize);
}
#else
char range[1024];
size64_t rangeend;
Aws::S3::Model::GetObjectRequest object_request;
object_request.SetBucket(bucket);
object_request.SetKey(key);
rangeend = (start+count)-1;
snprintf(range,sizeof(range),"bytes=%llu-%llu",start,rangeend);
object_request.SetRange(range);
auto get_object_result = AWSS3GET(s3client)->GetObject(object_request);
if(!get_object_result.IsSuccess()) {
if(errmsgp) *errmsgp = makeerrmsg(get_object_result.GetError(),key);
stat = NC_ES3;
} else {
/* Get the whole result */
Aws::IOStream &result = get_object_result.GetResultWithOwnership().GetBody();
std::string str((std::istreambuf_iterator<char>(result)),std::istreambuf_iterator<char>());
/* Verify actual result size */
size_t slen = str.size();
if(slen > count) return NC_ES3;
const char* s = str.c_str();
if(content)
memcpy(content,s,slen);
}
#endif
return NCUNTRACE(stat);
}
/*
For S3, I can see no way to do a byterange write;
so we are effectively writing the whole object
*/
EXTERNL int
NC_s3sdkwriteobject(void* s3client0, const char* bucket, const char* pathkey, size64_t count, const void* content, char** errmsgp)
{
int stat = NC_NOERR;
const char* key = NULL;
const char* mcontent = (char*)content;
NCTRACE(11,"bucket=%s pathkey=%s count=%lld content=%p",bucket,pathkey,count,content);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
if(errmsgp) *errmsgp = NULL;
if(*pathkey != '/') return NCUNTRACE(NC_EINTERNAL);
if((stat = makes3key(pathkey,&key))) return NCUNTRACE(stat);
#ifdef TRANSFER
auto executor = Aws::MakeShared<Aws::Utils::Threading::PooledThreadExecutor>("executor", 25);
Aws::Transfer::TransferManagerConfiguration transfer_config(executor.get());
transfer_config.s3Client = *s3client;
auto transfer_manager = Aws::Transfer::TransferManager::Create(transfer_config);
std::shared_ptr<Aws::IOStream> uploadStream = std::shared_ptr<Aws::IOStream>(new Aws::StringStream());
uploadStream->rdbuf()->pubsetbuf((char*)content,count);
auto uploadHandle = transfer_manager->UploadFile(uploadStream, bucket, key, "application/octet-stream", Aws::Map<Aws::String, Aws::String>());
uploadHandle->WaitUntilFinished();
bool success = uploadHandle->GetStatus() == Aws::Transfer::TransferStatus::COMPLETED;
if (!success) {
auto err = uploadHandle->GetLastError();
if(errmsgp) *errmsgp = makeerrmsg(err,key);
stat = NC_ES3;
} else {
size64_t transferred = uploadHandle->GetBytesTransferred();
size64_t totalsize = uploadHandle->GetBytesTotalSize();
assert(count == totalsize && transferred == totalsize);
}
#else
Aws::S3::Model::PutObjectRequest put_request;
put_request.SetBucket(bucket);
put_request.SetKey(key);
put_request.SetContentLength((long long)count);
std::shared_ptr<Aws::IOStream> data = std::shared_ptr<Aws::IOStream>(new Aws::StringStream());
data->rdbuf()->pubsetbuf((char*)content,count);
put_request.SetBody(data);
auto put_result = AWSS3GET(s3client)->PutObject(put_request);
if(!put_result.IsSuccess()) {
if(errmsgp) *errmsgp = makeerrmsg(put_result.GetError(),key);
stat = NC_ES3;
}
#endif
return NCUNTRACE(stat);
}
EXTERNL int
NC_s3sdkclose(void* s3client0, NCS3INFO* info, int deleteit, char** errmsgp)
{
int stat = NC_NOERR;
NCTRACE(11,"info=%s rootkey=%s deleteit=%d",dumps3info(info),deleteit);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
if(deleteit) {
/* Delete the root key; ok it if does not exist */
switch (stat = NC_s3sdkdeletekey(s3client0,info->bucket,info->rootkey,errmsgp)) {
case NC_NOERR: break;
case NC_EEMPTY: case NC_ENOTFOUND: stat = NC_NOERR; break;
default: break;
}
}
#ifdef TRANSFER
delete s3client;
#else
delete s3client;
#endif
return NCUNTRACE(stat);
}
/*
Return a list of names of legal objects immediately below a specified key.
In theory, the returned list should be sorted in lexical order,
but it possible that it is not.
*/
static int
getkeys(void* s3client0, const char* bucket, const char* prefixkey0, const char* delim, size_t* nkeysp, char*** keysp, char** errmsgp)
{
int stat = NC_NOERR;
const char* prefix = NULL;
char* prefixdir = NULL;
bool istruncated = false;
char* continuetoken = NULL;
AWSS3CLIENT s3client = NULL;
KeySet commonkeys;
KeySet realkeys;
KeySet allkeys;
NCTRACE(11,"bucket=%s prefixkey0=%s",bucket,prefixkey0);
if(*prefixkey0 != '/') {stat = NC_EINTERNAL; goto done;}
if(errmsgp) *errmsgp = NULL;
s3client = (AWSS3CLIENT)s3client0;
do {
Aws::S3::Model::ListObjectsV2Request objects_request;
if(prefixdir != NULL) free(prefixdir);
realkeys.clear();
commonkeys.clear();
/* Make sure that the prefix ends with '/' */
if((stat = makes3keydir(prefixkey0,&prefixdir))) goto done;
/* remove leading '/' */
if((stat = makes3key(prefixdir,&prefix))) goto done;
objects_request.SetBucket(bucket);
objects_request.SetPrefix(prefix);
if(delim != NULL) {
objects_request.SetDelimiter(delim); /* Force return of common prefixes */
}
if(istruncated && continuetoken != NULL) {
objects_request.SetContinuationToken(continuetoken);
free(continuetoken); continuetoken = NULL;
}
auto objects_outcome = AWSS3GET(s3client)->ListObjectsV2(objects_request);
if(objects_outcome.IsSuccess()) {
const Aws::S3::Model::ListObjectsV2Result& result = objects_outcome.GetResult();
istruncated = result.GetIsTruncated();
if(istruncated)
continuetoken = strdup(result.GetNextContinuationToken().c_str());
Aws::Vector<Aws::S3::Model::Object> object_list =
objects_outcome.GetResult().GetContents();
if((stat = s3objectsinfo(object_list,&realkeys))) goto done;
/* Add common prefixes */
Aws::Vector<Aws::S3::Model::CommonPrefix> common_list =
objects_outcome.GetResult().GetCommonPrefixes();
if((stat = s3commonprefixes(common_list,&commonkeys))) goto done;
/* merge the two lists; target list might not be empty */
if((stat=mergekeysets(&realkeys, &commonkeys, &allkeys))) goto done;
} else {
if(errmsgp) *errmsgp = makeerrmsg(objects_outcome.GetError());
stat = NC_ES3;
goto done;
}
} while(istruncated);
if(nkeysp) {*nkeysp = allkeys.getnkeys();}
if(keysp) {*keysp = allkeys.extractkeys();}
done:
realkeys.clear();
commonkeys.clear();
allkeys.clear();
if(prefixdir != NULL) free(prefixdir);
if(continuetoken != NULL) free(continuetoken);
if(stat)
return NCUNTRACE(stat);
else
return NCUNTRACEX(stat,"nkeys=%u",(unsigned)*nkeysp);
}
/*
Return a list of full keys of legal objects immediately below a specified key.
Not necessarily sorted.
*/
EXTERNL int
NC_s3sdkgetkeys(void* s3client0, const char* bucket, const char* prefixkey0, size_t* nkeysp, char*** keysp, char** errmsgp)
{
return getkeys(s3client0, bucket, prefixkey0, "/", nkeysp, keysp, errmsgp);
}
/*
Return a list of full keys of legal objects immediately below a specified key.
Not necessarily sorted.
*/
EXTERNL int
NC_s3sdksearch(void* s3client0, const char* bucket, const char* prefixkey0, size_t* nkeysp, char*** keysp, char** errmsgp)
{
return getkeys(s3client0, bucket, prefixkey0, NULL, nkeysp, keysp, errmsgp);
}
EXTERNL int
NC_s3sdkdeletekey(void* s3client0, const char* bucket, const char* pathkey, char** errmsgp)
{
int stat = NC_NOERR;
const char* key = NULL;
NCTRACE(11,"bucket=%s pathkey=%s",bucket,pathkey);
AWSS3CLIENT s3client = (AWSS3CLIENT)s3client0;
Aws::S3::Model::DeleteObjectRequest delete_request;
assert(pathkey != NULL && *pathkey == '/');
if((stat = makes3key(pathkey,&key))) return NCUNTRACE(stat);
/* Delete this key object */
delete_request.SetBucket(bucket);
delete_request.SetKey(key);
auto delete_result = AWSS3GET(s3client)->DeleteObject(delete_request);
if(!delete_result.IsSuccess()) {
if(errmsgp) *errmsgp = makeerrmsg(delete_result.GetError(),key);
stat = NC_ES3;
}
return NCUNTRACE(stat);
}
/*
Get Info about a single object from a vector
*/
static int
s3objectinfo1(const Aws::S3::Model::Object& s3_object, char** fullkeyp)
{
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(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, KeySet* keys)
{
int stat = NC_NOERR;
int i;
i = 0;
for (auto const &s3_object : list) {
char* akey = NULL;
stat = s3objectinfo1(s3_object,&akey);
i++;
if(stat) break;
keys->push(akey);
}
return stat;
}
static int
s3commonprefixes(Aws::Vector<Aws::S3::Model::CommonPrefix> list, KeySet* keys)
{
int stat = NC_NOERR;
for (auto const &s3prefix : list) {
char* p; const char* px; char* p1;
size_t len, alloc;
const Aws::String& prefix = s3prefix.GetPrefix();
len = prefix.length();
alloc = len + 1 + 1; /* for nul + leading '/' */
if((p = (char*) malloc(alloc))==NULL)
stat = NC_ENOMEM;
if(stat == NC_NOERR) {
px = prefix.c_str();
p1 = p;
if(*px != '/') *p1++ = '/';
memcpy(p1,px,len);
p1 += len;
*p1 = '\0';
keys->push(p);
}
}
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);
}
};
#if 0
static void
freestringenvv(char** ss)
{
char** p;
if(ss != NULL) {
for(p=ss;*p;p++)
if(*p) free(*p);
free(ss);
}
}
#endif
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 int
mergekeysets(KeySet* keys1, KeySet* keys2, KeySet* merge)
{
size_t i;
for(i=0;i<keys1->getnkeys();i++)
merge->push(keys1->extractithkey(i));
for(i=0;i<keys2->getnkeys();i++)
merge->push(keys2->extractithkey(i));
return NC_NOERR;
}
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