Amazon S3 Signature Does Not Match - AWS SDK Java

Question

I have a play application that needs to upload files to S3. We are developing in scala and using the Java AWS SDK.

I\'m having trouble trying to upload files, I keep

Answer 1

I had the same issue, but removing content-type works fine. Hereby sharing the complete code.

public class GeneratePresignedUrlAndUploadObject {
    private static final String BUCKET_NAME = ""; 
    private static final String OBJECT_KEY  = "";
    private static final String AWS_ACCESS_KEY = "";
    private static final String AWS_SECRET_KEY = "";

    public static void main(String[] args) throws IOException {
        BasicAWSCredentials awsCreds = new BasicAWSCredentials(AWS_ACCESS_KEY, AWS_SECRET_KEY);

        AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withRegion(Regions.US_EAST_1)
                .withCredentials(new AWSStaticCredentialsProvider(awsCreds)).build();

        try {
            System.out.println("Generating pre-signed URL.");
            java.util.Date expiration = new java.util.Date();
            long milliSeconds = expiration.getTime();
            milliSeconds += 1000 * 60 * 60;
            expiration.setTime(milliSeconds);

            GeneratePresignedUrlRequest generatePresignedUrlRequest = 
                    new GeneratePresignedUrlRequest(BUCKET_NAME, OBJECT_KEY);
            generatePresignedUrlRequest.setMethod(HttpMethod.PUT); 
            generatePresignedUrlRequest.setExpiration(expiration);
            URL url = s3Client.generatePresignedUrl(generatePresignedUrlRequest); 

            UploadObject(url);

            System.out.println("Pre-Signed URL = " + url.toString());
        } catch (AmazonServiceException exception) {
            System.out.println("Caught an AmazonServiceException, " +
                    "which means your request made it " +
                    "to Amazon S3, but was rejected with an error response " +
            "for some reason.");
            System.out.println("Error Message: " + exception.getMessage());
            System.out.println("HTTP  Code: "    + exception.getStatusCode());
            System.out.println("AWS Error Code:" + exception.getErrorCode());
            System.out.println("Error Type:    " + exception.getErrorType());
            System.out.println("Request ID:    " + exception.getRequestId());
        } catch (AmazonClientException ace) {
            System.out.println("Caught an AmazonClientException, " +
                    "which means the client encountered " +
                    "an internal error while trying to communicate" +
                    " with S3, " +
            "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }
    }

    public static void UploadObject(URL url) throws IOException
    {
        HttpURLConnection connection=(HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setRequestMethod("PUT");
        OutputStreamWriter out = new OutputStreamWriter(
                connection.getOutputStream());
        out.write("This text uploaded as object.");
        out.close();
        int responseCode = connection.getResponseCode();
        System.out.println("Service returned response code " + responseCode);

    }
}