Ignore part-number-marker when zero

S3Proxy does not support pagination but it can support this initial
no-op value.  Fixes #162.

src/main/java/org/gaul/s3proxy/S3ProxyHandler.java

@@ -143,6 +143,7 @@ public class S3ProxyHandler {
             "location",
             "marker",
             "max-keys",
+            "part-number-marker",
             "partNumber",
             "prefix",
             "response-cache-control",
@@ -1888,7 +1889,13 @@ public class S3ProxyHandler {
     private void handleListParts(HttpServletRequest request,
             HttpServletResponse response, BlobStore blobStore,
             String containerName, String blobName, String uploadId)
-            throws IOException {
+            throws IOException, S3Exception {
+        // support only the no-op zero case
+        String partNumberMarker = request.getParameter("part-number-marker");
+        if (partNumberMarker != null && !partNumberMarker.equals("0")) {
+            throw new S3Exception(S3ErrorCode.NOT_IMPLEMENTED);
+        }
+
         // TODO: how to reconstruct original mpu?
         MultipartUpload mpu = MultipartUpload.create(containerName,
                 blobName, uploadId, createFakeBlobMetadata(blobStore),

src/test/java/org/gaul/s3proxy/S3AwsSdkTest.java

@@ -56,6 +56,7 @@ import com.amazonaws.services.s3.model.GroupGrantee;
 import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
 import com.amazonaws.services.s3.model.InitiateMultipartUploadResult;
 import com.amazonaws.services.s3.model.ListObjectsRequest;
+import com.amazonaws.services.s3.model.ListPartsRequest;
 import com.amazonaws.services.s3.model.ObjectListing;
 import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.Permission;
@@ -500,6 +501,24 @@ public final class S3AwsSdkTest {
             .isEqualTo(expiresTime);
     }
 
+    @Test
+    public void testPartNumberMarker() throws Exception {
+        String blobName = "foo";
+        InitiateMultipartUploadResult result = client.initiateMultipartUpload(
+                new InitiateMultipartUploadRequest(containerName, blobName));
+        ListPartsRequest request = new ListPartsRequest(containerName,
+                blobName, result.getUploadId());
+
+        client.listParts(request.withPartNumberMarker(0));
+
+        try {
+            client.listParts(request.withPartNumberMarker(1));
+            Fail.failBecauseExceptionWasNotThrown(AmazonS3Exception.class);
+        } catch (AmazonS3Exception e) {
+            assertThat(e.getErrorCode()).isEqualTo("NotImplemented");
+        }
+    }
+
     private static final class NullX509TrustManager
             implements X509TrustManager {
         @Override