Bug fix on the S3OutputStream wrapper (#56)

* Bug fix to properly upload files that are less than the buffer size

zulia-server/src/main/java/io/zulia/server/filestorage/io/S3OutputStream.java

@@ -1,15 +1,22 @@
 package io.zulia.server.filestorage.io;
 
+import software.amazon.awssdk.core.sync.RequestBody;
+import software.amazon.awssdk.services.s3.S3Client;
+import software.amazon.awssdk.services.s3.model.AbortMultipartUploadRequest;
+import software.amazon.awssdk.services.s3.model.CompleteMultipartUploadRequest;
+import software.amazon.awssdk.services.s3.model.CompletedMultipartUpload;
+import software.amazon.awssdk.services.s3.model.CompletedPart;
+import software.amazon.awssdk.services.s3.model.CreateMultipartUploadRequest;
+import software.amazon.awssdk.services.s3.model.CreateMultipartUploadResponse;
+import software.amazon.awssdk.services.s3.model.PutObjectRequest;
+import software.amazon.awssdk.services.s3.model.UploadPartRequest;
+import software.amazon.awssdk.services.s3.model.UploadPartResponse;
+
 import java.io.ByteArrayInputStream;
 import java.io.OutputStream;
-import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
-import software.amazon.awssdk.core.sync.RequestBody;
-import software.amazon.awssdk.services.s3.S3Client;
-import software.amazon.awssdk.services.s3.model.*;
-
 /**
  * OutputStream which wraps S3Client, with support for streaming large files directly to S3
  *
@@ -141,8 +148,8 @@ public void close() {
 				this.s3Client.completeMultipartUpload(cmur);
 			}
 			else {
-				PutObjectRequest req = PutObjectRequest.builder().bucket(bucket).key(key).contentLength((long) this.buf.length).build();
-				s3Client.putObject(req, RequestBody.fromBytes(this.buf));
+				PutObjectRequest req = PutObjectRequest.builder().bucket(bucket).key(key).contentLength((long) this.position).build();
+				s3Client.putObject(req, RequestBody.fromInputStream(new ByteArrayInputStream(buf, 0, this.position), this.position));
 			}
 		}
 	}