AmazonClientException: More data read has a different length the expected - amazon-web-services

Question

When I try to upload content to an Amazon S3 bucket, I get an AmazonClientException: Data read has a different length than the expected.
Here is my code.
public Object uploadFile(MultipartFile file) {
String fileName = System.currentTimeMillis() + "_" + file.getOriginalFilename();
log.info("uploadFile-> starting file upload " + fileName);
Path path = Paths.get(file.getOriginalFilename());
File fileObj = new File(file.getOriginalFilename());
try (FileOutputStream os = new FileOutputStream(fileObj)) {
os.write(file.getBytes());
os.close();
String uploadFilePath = bucketName + "/" + uploadPath;
s3Client.putObject(new PutObjectRequest(uploadFilePath, fileName, fileObj));
Files.delete(path);
} catch (IOException ex) {
log.error("error [" + ex.getMessage() + "] occurred while uploading [" + fileName + "] ");
}
log.info("uploadFile-> file uploaded process completed at: " + LocalDateTime.now() + " for - " + fileName);
return "File uploaded : " + fileName;
}

Answer 1

Amazon recommends using the Amazon S3 Java V2 API over use of V1.
The AWS SDK for Java 2.x is a major rewrite of the version 1.x code base. It’s built on top of Java 8+ and adds several frequently requested features. These include support for non-blocking I/O and the ability to plug in a different HTTP implementation at run time.
To upload content to an Amazon S3 bucket, use this V2 code.
public static String putS3Object(S3Client s3,
String bucketName,
String objectKey,
String objectPath) {
try {
Map<String, String> metadata = new HashMap<>();
metadata.put("myVal", "test");
PutObjectRequest putOb = PutObjectRequest.builder()
.bucket(bucketName)
.key(objectKey)
.metadata(metadata)
.build();
PutObjectResponse response = s3.putObject(putOb,
RequestBody.fromBytes(getObjectFile(objectPath)));
return response.eTag();
} catch (S3Exception e) {
System.err.println(e.getMessage());
System.exit(1);
}
return "";
}
Full example here.
If you are not familiar with V2, please refer to this doc topic:
https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html

Answer 2

AWS Java SDK 1.x
s3.putObject(bucketName, key, new File(filePath));
AWS Java SDK 2.X
PutObjectRequest putObjectRequest = PutObjectRequest
.builder()
.bucket(bucketName)
.key(key)
.build();
s3Client.putObject(putObjectRequest, Paths.get(filePath));