java - 尝试将文件上传到 Amazon S3 时返回错误代码 400

Question

我是 AWS 的新手，现在我正在尝试编写一个独立的 Java 应用程序来将 PDF 上传到 AWS S3。但是，返回错误:400。

任何人都可以给我一些有关如何解决此错误的一般指导吗？

public class App {

private static String PDF_PATH = "/tmp/pdf-test.pdf";

public static void main(String[] args) throws IOException {

    // prepare AWS credential
    BasicAWSCredentials awsCreds = new BasicAWSCredentials("xxx",
            "yyy");
    AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withRegion("aaa")
            .withCredentials(new AWSStaticCredentialsProvider(awsCreds)).build();

    // upload a test PDF
    byte[] pdfDoc = Files.readAllBytes((new File(PDF_PATH)).toPath());
    PutObjectRequest request = new PutObjectRequest("aaa", "bbb",
            new String(Base64.getEncoder().encode(pdfDoc)));
    ObjectMetadata metadata = new ObjectMetadata();
    metadata.setContentType("application/pdf");
    metadata.setContentLength(pdfDoc.length);
    request.setMetadata(metadata);
    s3Client.putObject(request);
}

}

Answer 1

为了扩展 @AlexGoja 所说的内容，有 three constructors对于 PutObjectRequest。 One of them需要三个字符串。但是，第三个字符串参数不是 Base64 编码的文件。我不确定你从哪里得到的。您想使用the constructor that takes a File上传文件:

public class App {

private static String PDF_PATH = "/tmp/pdf-test.pdf";

public static void main(String[] args) throws IOException {

    // prepare AWS credential
    BasicAWSCredentials awsCreds = new BasicAWSCredentials("xxx",
            "yyy");
    AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withRegion("aaa")
            .withCredentials(new AWSStaticCredentialsProvider(awsCreds)).build();

    // upload a test PDF
    File pdfFile = new File(PDF_PATH);
    PutObjectRequest request = new PutObjectRequest("aaa", "bbb", pdfFile );
    ObjectMetadata metadata = new ObjectMetadata();
    metadata.setContentType("application/pdf");
    metadata.setContentLength(pdfFile.length());
    request.setMetadata(metadata);
    s3Client.putObject(request);
}

}