本文介绍如何将OSS文件下载到本地内存。
以下代码用于把指定的OSS文件下载到本地内存:
#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;
int main(void)
{
/*初始化OSS账号信息。*/
/*阿里云账号AccessKey拥有所有API的访问权限,风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维,请登录RAM控制台创建RAM用户。*/
std::string AccessKeyId = "yourAccessKeyId";
std::string AccessKeySecret = "yourAccessKeySecret";
/*填写Bucket所在地域对应的Endpoint。以华东1(杭州)为例,Endpoint填写为https://oss-cn-hangzhou.aliyuncs.com。*/
std::string Endpoint = "yourEndpoint";
/*填写Bucket名称。*/
std::string BucketName = "yourBucketName";
/*填写不包含Bucket名称在内的Object的完整路径,例如desrfolder/exampleobject.txt。*/
std::string ObjectName = "yourObjectName";
/*初始化网络等资源。*/
InitializeSdk();
ClientConfiguration conf;
OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);
/*获取文件到本地内存。*/
GetObjectRequest request(BucketName, ObjectName);
auto outcome = client.GetObject(request);
if (outcome.isSuccess()) {
std::cout << "getObjectToBuffer" << " success, Content-Length:" << outcome.result().Metadata().ContentLength() << std::endl;
/*通过read接口读取数据。*/
auto& stream = outcome.result().Content();
char buffer[256];
while (stream->good()) {
stream->read(buffer, 256);
auto count = stream->gcount();
/*根据实际情况处理数据。*/
}
}
else {
/*异常处理。*/
std::cout << "getObjectToBuffer fail" <<
",code:" << outcome.error().Code() <<
",message:" << outcome.error().Message() <<
",requestId:" << outcome.error().RequestId() << std::endl;
ShutdownSdk();
return -1;
}
/*释放网络等资源。*/
ShutdownSdk();
return 0;
}