S3 PutObjectRequest - Using uploaded file head information to set metadata like ContentType automatically

[BarisGece]

When I upload files without Metadata( like ContentType) in aws java sdk 1.x.x, files which are uploaded on s3 get correct ContentType value such as .html => ContentType = text/html or .js => ContentType = application/x-javascript, but when we upload files without Metadata in aws java sdk 2, all files which are uploaded on s3 get ContentType = binary/octet-stream.

When I set the ContentType value in aws2 as below, all files are getting same ContentType value as normally.

Is it possible like in sdk 1.x.x to set ContentType value from file head automatically

Sample Code

AWS SDK 1.x.x

final PutObjectRequest putRequest = new PutObjectRequest(s3bucket, targetDirectory + "/" + file.getName(), file).withCannedAcl(CannedAccessControlList.PublicRead);
final Upload upload = transferManager.upload(putRequest);

without ContentType - AWS SDK 2.0

final S3Client s3client;
s3client.putObject(PutObjectRequest.builder().bucket(s3bucket).key(targetDirectory + FileSystems.getDefault().getSeparator() + file.getFileName()).acl(ObjectCannedACL.PUBLIC_READ).build(),RequestBody.of(file));

with ContentType - AWS SDK 2.0

final S3Client s3client;
s3client.putObject(PutObjectRequest.builder().bucket(s3bucket).key(targetDirectory + FileSystems.getDefault().getSeparator() + file.getFileName()).acl(ObjectCannedACL.PUBLIC_READ).contentType("text/html").build(),RequestBody.of(file));

Your Environment

• AWS Java SDK version used: 2.0.0-preview-8
• JDK version used: 1.8.0_144
• Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
• Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
• Operating System and version: Ubuntu - 16.04.1, Kernel Version: 4.10.0-38-generic

[BarisGece]

You can use this workaround until it's implemented

[zoewangg]

Hi @BarisGece, could you double check you are using 2.0.0-preview-8? The changes should be pushed and released in 2.0.0-preview-8, as you can see in unit test and in commit.

I also tried a quick test and the contentType looks correct.

        file = new RandomTempFile("test.js", 10_000);
        s3.putObject(PutObjectRequest.builder()
                                     .bucket(BUCKET)
                                     .key(file.getName())
                                     .build(), file.toPath());
        
        getObjectRequest = GetObjectRequest.builder()
                                           .bucket(BUCKET)
                                           .key(file.getName())
                                           .build();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        GetObjectResponse response = s3.getObject(getObjectRequest, StreamingResponseHandler.toOutputStream(baos));
        assertThat(response.contentType()).isEqualTo("application/javascript");

[BarisGece]

Hi @zoewangg, yes u r right. I used 2.0.0-preview-7. It's work fine with 2.0.0-preview-8 or2.0.0-preview-9
Thanks a lot.