无法从链 AwsCredentialsProviderChain 中的任何提供程序加载凭据

Question

尝试将文件读取到 AWS S3 错误时出现以下异常：

无法从链中的任何提供商加载 AWS 凭证。

我生成了一个公共存储桶，还生成了一个具有完整 S3 存储桶访问权限和 textract 访问权限的 AWS IAM 角色。

我正在尝试从 S3 存储桶中读取图像并运行 AWS Textract 服务。

Java 代码：

package com.textract;

import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectInputStream;
import software.amazon.awssdk.core.SdkBytes;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.textract.TextractClient;
import software.amazon.awssdk.services.textract.model.*;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;


public class App {

    public static Map<String, String> getRelationships(Map<String, Block> blockMap, Map<String, Block> keyMap,Map<String, Block> valueMap) {
        Map<String, String> result = new LinkedHashMap<>();
        for(Map.Entry<String, Block> itr : keyMap.entrySet()) {
            Block valueBlock = findValue(itr.getValue(), valueMap);
            String key = getText(itr.getValue(), blockMap);
            String value = getText(valueBlock, blockMap);
            result.put(key, value);
        }
        return result;
    }

    public static Block findValue(Block keyBlock, Map<String, Block> valueMap) {
        Block b = null;
        for(Relationship relationship : keyBlock.relationships()) {
            if(relationship.type().toString().equals("VALUE")) {
                for(String id : relationship.ids()) {
                    b = valueMap.get(id);
                }
            }
        }
        return b;
    }

    public static String getText(Block result, Map<String, Block> blockMap) {
        StringBuilder stringBuilder = new StringBuilder();
        for(Relationship relationship : result.relationships()) {
            if(relationship.type().toString().equals("CHILD")) {
                for(String id : relationship.ids()) {
                    Block b = blockMap.get(id);
                    if(b.blockTypeAsString().equals("WORD")) {
                        stringBuilder.append(b.text()).append(" ");
                    }
                 }
            }
        }
        return stringBuilder.toString();
    }

    public static void main(String[] args) {
        
        BasicAWSCredentials creds = new BasicAWSCredentials("<Secret Key>", "<Access Key>");
        AmazonS3 s3client = AmazonS3Client.builder()
                .withRegion("ap-southeast-1")
                .withCredentials(new AWSStaticCredentialsProvider(creds))
                .build();
        
//        AmazonS3 s3client = AmazonS3ClientBuilder.standard().build();
        S3Object s3Object = s3client.getObject("<S3 Bucket>", "image.jpg");
        S3ObjectInputStream s3ObjectInputStream = s3Object.getObjectContent();

        SdkBytes bytes = SdkBytes.fromInputStream(s3ObjectInputStream);
        Document doc = Document.builder().bytes(bytes).build();

        List<FeatureType> list = new ArrayList<>();
        list.add(FeatureType.FORMS);

        AnalyzeDocumentRequest request = AnalyzeDocumentRequest.builder().featureTypes(list).document(doc).build();

        TextractClient textractClient = TextractClient.builder().region(Region.US_WEST_2).build();

        AnalyzeDocumentResponse response = textractClient.analyzeDocument(request);
        List<Block> blocks = response.blocks();

        Map<String, Block> blockMap = new LinkedHashMap<>();
        Map<String, Block> keyMap = new LinkedHashMap<>();
        Map<String, Block> valueMap = new LinkedHashMap<>();

        for (Block b : blocks) {
            String block_id = b.id();
            blockMap.put(block_id, b);
            if(b.blockTypeAsString().equals("KEY_VALUE_SET")) {
                for(EntityType entityType : b.entityTypes()) {
                    if(entityType.toString().equals("KEY")) {
                        keyMap.put(block_id, b);
                    } else {
                        valueMap.put(block_id, b);
                    }
                }
            }
        }
            System.out.println(getRelationships(blockMap, keyMap, valueMap));
            textractClient.close();

    }
}

控制台错误：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" software.amazon.awssdk.core.exception.SdkClientException: Unable to load credentials from any of the providers in the chain AwsCredentialsProviderChain(credentialsProviders=[SystemPropertyCredentialsProvider(), EnvironmentVariableCredentialsProvider(), WebIdentityTokenCredentialsProvider(), ProfileCredentialsProvider(), ContainerCredentialsProvider(), InstanceProfileCredentialsProvider()]) : [SystemPropertyCredentialsProvider(): Unable to load credentials from system settings. Access key must be specified either via environment variable (AWS_ACCESS_KEY_ID) or system property (aws.accessKeyId)., EnvironmentVariableCredentialsProvider(): Unable to load credentials from system settings. Access key must be specified either via environment variable (AWS_ACCESS_KEY_ID) or system property (aws.accessKeyId)., WebIdentityTokenCredentialsProvider(): Either the environment variable AWS_WEB_IDENTITY_TOKEN_FILE or the javaproperty aws.webIdentityTokenFile must be set., ProfileCredentialsProvider(): Profile file contained no credentials for profile 'default': ProfileFile(profiles=[]), ContainerCredentialsProvider(): Cannot fetch credentials from container - neither AWS_CONTAINER_CREDENTIALS_FULL_URI or AWS_CONTAINER_CREDENTIALS_RELATIVE_URI environment variables are set., InstanceProfileCredentialsProvider(): Unable to load credentials from service endpoint.]
    at software.amazon.awssdk.core.exception.SdkClientException$BuilderImpl.build(SdkClientException.java:98)
    at software.amazon.awssdk.auth.credentials.AwsCredentialsProviderChain.resolveCredentials(AwsCredentialsProviderChain.java:112)
    at software.amazon.awssdk.auth.credentials.internal.LazyAwsCredentialsProvider.resolveCredentials(LazyAwsCredentialsProvider.java:45)
    at software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider.resolveCredentials(DefaultCredentialsProvider.java:104)
    at software.amazon.awssdk.awscore.client.handler.AwsClientHandlerUtils.createExecutionContext(AwsClientHandlerUtils.java:76)
    at software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.createExecutionContext(AwsSyncClientHandler.java:68)
    at software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.lambda$execute$1(BaseSyncClientHandler.java:97)
    at software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.measureApiCallSuccess(BaseSyncClientHandler.java:167)
    at software.amazon.awssdk.core.internal.handler.BaseSyncClientHandler.execute(BaseSyncClientHandler.java:94)
    at software.amazon.awssdk.core.client.handler.SdkSyncClientHandler.execute(SdkSyncClientHandler.java:45)
    at software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.execute(AwsSyncClientHandler.java:55)
    at software.amazon.awssdk.services.textract.DefaultTextractClient.analyzeDocument(DefaultTextractClient.java:215)
    at com.textract.App.main(App.java:83)

Answer 1

您只是将凭据传递给 S3 客户端。 您不会将它们传递给 Textract 客户端。 如果您像那样手动创建凭据提供程序，则需要将其传递给创建的每个客户端实例。

我强烈建议使用环境变量AWS_ACCESS_KEY_ID和AWS_SECRET_ACCESS_KEY来提供凭证，而不是像那样直接在代码中设置它们，因为当您在其他环境中运行此代码时它会更加灵活，并且允许 AWS SDK 获取凭据自动生成，根本不需要您创建凭据提供程序。

Answer 2

我终于在下面的文章中使用了下面的代码：

调用 Amazon Textract 同步操作

String document="input.png";
String bucket="bucket";

AmazonTextract client = AmazonTextractClientBuilder.defaultClient();

DetectDocumentTextRequest request = new DetectDocumentTextRequest()
        .withDocument(new Document()
                .withS3Object(new S3Object()
                        .withName(document)
                        .withBucket(bucket)));

DetectDocumentTextResult result = client.detectDocumentText(request);

工作代码

package aws.cloud.work;

import java.io.IOException;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.textract.AmazonTextract;
import com.amazonaws.services.textract.AmazonTextractClientBuilder;
import com.amazonaws.services.textract.model.DetectDocumentTextRequest;
import com.amazonaws.services.textract.model.DetectDocumentTextResult;
import com.amazonaws.services.textract.model.Document;
import com.amazonaws.services.textract.model.S3Object;

public class TextractOriginalMaster3 {

    static AmazonTextractClientBuilder clientBuilder = AmazonTextractClientBuilder.standard().withRegion(Regions.AP_SOUTHEAST_1);

    public static void main(String[] args) throws IOException {
       
        //Set AWS Credentials to use Textract
        clientBuilder.setCredentials(new AWSStaticCredentialsProvider(new
                BasicAWSCredentials("Accesskey", "Secretkey")));

        //**Getting document from S3 Bucket Path
        String document = "image.png";
        String bucket = "Bucket Name";

        //Calling AWS Textract Client
        AmazonTextract client = clientBuilder.build();
        DetectDocumentTextRequest request = new DetectDocumentTextRequest()
                .withDocument(new Document()
                        .withS3Object(new S3Object()
                                .withName(document)
                                .withBucket(bucket)));
        DetectDocumentTextResult result = client.detectDocumentText(request);
        System.out.println(result);
        result.getBlocks().forEach(block -> {
            if (block.getBlockType().equals("LINE"))
                System.out.println("text is " + block.getText() + " confidence is " + block.getConfidence());
        });
        
    }
}

Answer 3

要回答这个问题，我们可以使用 StaticCredentialsProvider 加载凭证。请参考以下代码。

TextractClient textractClient = TextractClient.builder().region(Region.of(region)).credentialsProvider(StaticCredentialsProvider.create(AwsBasicCredentials
            .create(accessKey,secretKey))).build();