AmazonS3Client(credentials) 已棄用

Question

我正在嘗試閱讀 Amazon S3 上可用的文件，因為問題解釋了問題。 我找不到不推薦使用的構造函數的替代調用。

這是代碼：

private String AccessKeyID = "xxxxxxxxxxxxxxxxxxxx";
private String SecretAccessKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
private static String bucketName     = "documentcontainer";
private static String keyName     = "test";
//private static String uploadFileName    = "/PATH TO FILE WHICH WANT TO UPLOAD/abc.txt";

AWSCredentials credentials = new BasicAWSCredentials(AccessKeyID, SecretAccessKey);

void downloadfile() throws IOException
{

    // Problem lies here - AmazonS3Client is deprecated
    AmazonS3 s3client = new AmazonS3Client(credentials);
        try {
        System.out.println("Downloading an object...");
        S3Object s3object = s3client.getObject(new GetObjectRequest(
                bucketName, keyName));
        System.out.println("Content-Type: "  +
                s3object.getObjectMetadata().getContentType());
        InputStream input = s3object.getObjectContent();

        BufferedReader reader = new BufferedReader(new InputStreamReader(input));
        while (true) {
            String line = reader.readLine();
            if (line == null) break;

            System.out.println("    " + line);
        }
        System.out.println();
    } catch (AmazonServiceException ase) {
          //do something
    } catch (AmazonClientException ace) {
        // do something
    }
 }

有什么幫助嗎？ 如果需要更多解釋，請提及。 我檢查了SDK .zip 文件中提供的示例代碼，它是相同的。

Answer 1

您可以使用AmazonS3ClientBuilder或AwsClientBuilder作為替代方案。

對於 S3，最簡單的是使用 AmazonS3ClientBuilder，

BasicAWSCredentials creds = new BasicAWSCredentials("access_key", "secret_key"); 
AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(creds)).build();

Answer 2

使用下面列出的代碼創建一個沒有憑據的 S3 客戶端：

AmazonS3 s3Client = AmazonS3ClientBuilder.standard().build();

一個使用示例是調用 S3 的 lambda 函數。

Answer 3

您需要通過區域信息傳遞

com.amazonaws.regions.Region object.

Use AmazonS3Client(credentials, Region.getRegion(Regions.REPLACE_WITH_YOUR_REGION))

Answer 4

您可以按如下方式創建 S3 默認客戶端（使用 aws-java-sdk-s3-1.11.232）：

AmazonS3ClientBuilder.defaultClient();

Answer 5

在構造函數中僅使用憑據已棄用，您可以使用以下內容：

 val awsConfiguration = AWSConfiguration(context)
 val awsCreds = CognitoCachingCredentialsProvider(context, awsConfiguration)
 val s3Client = AmazonS3Client(awsCreds, Region.getRegion(Regions.EU_CENTRAL_1))

Answer 6

implementation 'com.amazonaws:aws-android-sdk-s3:2.16.12'

val key = "XXX"
val secret = "XXX"
val credentials = BasicAWSCredentials(key, secret)
val s3 = AmazonS3Client(
    credentials, com.amazonaws.regions.Region.getRegion(
        Regions.US_EAST_2
    )
)
val expires = Date(Date().time + 1000 * 60 * 60)

val keyFile = "13/thumbnail_800x600_13_photo.jpeg"
val generatePresignedUrlRequest = GeneratePresignedUrlRequest(
    "bucket_name",
    keyFile
)
generatePresignedUrlRequest.expiration = expires
val url: URL = s3.generatePresignedUrl(generatePresignedUrlRequest)

GlideApp.with(this)
    .load(url.toString())
    .apply(RequestOptions.centerCropTransform())
    .into(image)

Answer 7

使用 AWS SDK for Java 2.x，還可以構建自己的 credentialProvider，如下所示：

// 憑證提供者

package com.myproxylib.aws;

import software.amazon.awssdk.auth.credentials.AwsCredentials;
import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;

public class CustomCredentialsProvider implements AwsCredentialsProvider {

    private final String accessKeyId;
    private final String secretAccessKey;

    public CustomCredentialsProvider(String accessKeyId, String secretAccessKey) {
        this.secretAccessKey = secretAccessKey;
        this.accessKeyId = accessKeyId;
    }

    @Override
    public AwsCredentials resolveCredentials() {
        return new CustomAwsCredentialsResolver(accessKeyId, secretAccessKey);
    }

}

// 憑據解析器

package com.myproxylib.aws;

import software.amazon.awssdk.auth.credentials.AwsCredentials;

public class CustomAwsCredentialsResolver implements AwsCredentials {

    private final String accessKeyId;
    private final String secretAccessKey;

    CustomAwsCredentialsResolver(String accessKeyId, String secretAccessKey) {
        this.secretAccessKey = secretAccessKey;
        this.accessKeyId = accessKeyId;
    }

    @Override
    public String accessKeyId() {
        return accessKeyId;
    }

    @Override
    public String secretAccessKey() {
        return secretAccessKey;
    }
}

// 提供者的使用

package com.myproxylib.aws.s3;

public class S3Storage implements IS3StorageCapable {

    private final S3Client s3Client;

    public S3Storage(String accessKeyId, String secretAccessKey, String region) {

        this.s3Client = S3Client.builder().credentialsProvider(new CustomCredentialsProvider(accessKeyId, secretAccessKey)).region(of(region)).build();
    }

筆記：

1. 當然，庫用戶可以從任何他想要的地方獲取憑證，在調用 S3 構造函數之前將其解析為 java 屬性。

2. 如果可能，請支持其他答案和文檔中提到的其他方法。 為此，我的用例是必要的。