使用代码在 AWS SDK C++ 控制台应用程序上设置凭证

Question

我有多个 aws 凭证，并且希望能够使用特定凭证将数据上传到特定存储桶。

我正在尝试调整 aws sdk 示例 put_object.cpp 中提供的代码。我如何更改 client_config 以允许我输入我的特定密钥和访问密钥 ID。

为了完整起见，我将示例代码放在这里：

//snippet-sourcedescription:[put_object.cpp demonstrates how to put a file into an Amazon S3 bucket.]
//snippet-service:[s3]
//snippet-keyword:[Amazon S3]
//snippet-keyword:[C++]
//snippet-sourcesyntax:[cpp]
//snippet-keyword:[Code Sample]
//snippet-sourcetype:[full-example]
//snippet-sourceauthor:[AWS]

/*
   Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.

   This file is licensed under the Apache License, Version 2.0 (the "License").
   You may not use this file except in compliance with the License. A copy of
   the License is located at

    http://aws.amazon.com/apache2.0/

   This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied. See the License for the
   specific language governing permissions and limitations under the License.
*/

//snippet-start:[s3.cpp.put_object.inc]
#include <aws/core/Aws.h>
#include <aws/s3/S3Client.h>
#include <aws/s3/model/PutObjectRequest.h>
#include <iostream>
#include <fstream>
#include <sys/stat.h>
//snippet-end:[s3.cpp.put_object.inc]

/**
 * Check if file exists
 * 
 * Note: If using C++17, can use std::filesystem::exists()
 */
inline bool file_exists(const std::string& name)
{
    struct stat buffer;
    return (stat(name.c_str(), &buffer) == 0);
}

/**
 * Put an object into an Amazon S3 bucket
 */
bool put_s3_object(const Aws::String& s3_bucket_name, 
    const Aws::String& s3_object_name, 
    const std::string& file_name, 
    const Aws::String& region = "")
{
    // Verify file_name exists
    if (!file_exists(file_name)) {
        std::cout << "ERROR: NoSuchFile: The specified file does not exist" 
            << std::endl;
        return false;
    }

    // If region is specified, use it
    Aws::Client::ClientConfiguration clientConfig;
    if (!region.empty())
        clientConfig.region = region;

    // Set up request
    // snippet-start:[s3.cpp.put_object.code]
    Aws::S3::S3Client s3_client(clientConfig);
    Aws::S3::Model::PutObjectRequest object_request;

    object_request.SetBucket(s3_bucket_name);
    object_request.SetKey(s3_object_name);
    const std::shared_ptr<Aws::IOStream> input_data = 
        Aws::MakeShared<Aws::FStream>("SampleAllocationTag", 
                                      file_name.c_str(), 
                                      std::ios_base::in | std::ios_base::binary);
    object_request.SetBody(input_data);

    // Put the object
    auto put_object_outcome = s3_client.PutObject(object_request);
    if (!put_object_outcome.IsSuccess()) {
        auto error = put_object_outcome.GetError();
        std::cout << "ERROR: " << error.GetExceptionName() << ": " 
            << error.GetMessage() << std::endl;
        return false;
    }
    return true;
    // snippet-end:[s3.cpp.put_object.code]
}

/**
 * Exercise put_s3_object()
 */
int main(int argc, char** argv)
{

    Aws::SDKOptions options;
    Aws::InitAPI(options);
    {
        // Assign these values before running the program
        const Aws::String bucket_name = "BUCKET_NAME";
        const Aws::String object_name = "OBJECT_NAME";
        const std::string file_name = "FILE_NAME";
        const Aws::String region = "";      // Optional

        // Put the file into the S3 bucket
        if (put_s3_object(bucket_name, object_name, file_name, region)) {
            std::cout << "Put file " << file_name 
                << " to S3 bucket " << bucket_name 
                << " as object " << object_name << std::endl;
        }
    }
    Aws::ShutdownAPI(options);
}

Answer 1

您可以使用 Aws::Auth::Credential 并传递到 S3Client 构造函数中。

Aws::Auth::AWSCredentials credentials;
credentials.SetAWSAccessKeyId(Aws::String(accessKey));
credentials.SetAWSSecretKey(Aws::String(accessSecret));
Aws::S3::S3Client s3_client(credentials, clientConfig);