[GitHub] [hadoop] bharatviswa504 commented on a change in pull request #1279: HDDS-1942. Support copy during S3 multipart upload part creation

[GitBox <gi...@apache.org>]

bharatviswa504 commented on a change in pull request #1279: HDDS-1942. Support copy during S3 multipart upload part creation
URL: https://github.com/apache/hadoop/pull/1279#discussion_r314534295
 
 

 ##########
 File path: hadoop-ozone/s3gateway/src/main/java/org/apache/hadoop/ozone/s3/endpoint/ObjectEndpoint.java
 ##########
 @@ -553,12 +555,45 @@ private Response createMultipartKey(String bucket, String key, long length,
       OzoneBucket ozoneBucket = getBucket(bucket);
       OzoneOutputStream ozoneOutputStream = ozoneBucket.createMultipartKey(
           key, length, partNumber, uploadID);
-      IOUtils.copy(body, ozoneOutputStream);
+
+      String copyHeader = headers.getHeaderString(COPY_SOURCE_HEADER);
+      if (copyHeader != null) {
+        Pair<String, String> result = parseSourceHeader(copyHeader);
+
+        String sourceBucket = result.getLeft();
+        String sourceKey = result.getRight();
+
+        try (OzoneInputStream sourceObject =
+            getBucket(sourceBucket).readKey(sourceKey)) {
+
+          String range =
+              headers.getHeaderString(COPY_SOURCE_HEADER_RANGE);
+          if (range != null) {
+            RangeHeader rangeHeader =
+                RangeHeaderParserUtil.parseRangeHeader(range, 0);
+            IOUtils.copyLarge(sourceObject, ozoneOutputStream,
+                rangeHeader.getStartOffset(),
+                rangeHeader.getEndOffset() - rangeHeader.getStartOffset());
+
+          } else {
+            IOUtils.copy(sourceObject, ozoneOutputStream);
+          }
+        }
+
+      } else {
+        IOUtils.copy(body, ozoneOutputStream);
+      }
       ozoneOutputStream.close();
       OmMultipartCommitUploadPartInfo omMultipartCommitUploadPartInfo =
           ozoneOutputStream.getCommitUploadPartInfo();
-      return Response.status(Status.OK).header("ETag",
-          omMultipartCommitUploadPartInfo.getPartName()).build();
+      String eTag = omMultipartCommitUploadPartInfo.getPartName();
+
+      if (copyHeader != null) {
+        return Response.ok(new CopyPartResult(eTag)).build();
 
 Review comment:
   CopyPartResult from the documentation has 2 fields etag and LastModified. Here we are not setting lastModified.

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