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+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2017 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package minio
+
+/// Multipart upload defaults.
+
+// absMinPartSize - absolute minimum part size (5 MiB) below which
+// a part in a multipart upload may not be uploaded.
+const absMinPartSize = 1024 * 1024 * 5
+
+// minPartSize - minimum part size 16MiB per object after which
+// putObject behaves internally as multipart.
+const minPartSize = 1024 * 1024 * 16
+
+// maxPartsCount - maximum number of parts for a single multipart session.
+const maxPartsCount = 10000
+
+// maxPartSize - maximum part size 5GiB for a single multipart upload
+// operation.
+const maxPartSize = 1024 * 1024 * 1024 * 5
+
+// maxSinglePutObjectSize - maximum size 5GiB of object per PUT
+// operation.
+const maxSinglePutObjectSize = 1024 * 1024 * 1024 * 5
+
+// maxMultipartPutObjectSize - maximum size 5TiB of object for
+// Multipart operation.
+const maxMultipartPutObjectSize = 1024 * 1024 * 1024 * 1024 * 5
+
+// unsignedPayload - value to be set to X-Amz-Content-Sha256 header when
+// we don't want to sign the request payload
+const unsignedPayload = "UNSIGNED-PAYLOAD"
+
+// Total number of parallel workers used for multipart operation.
+const totalWorkers = 4
+
+// Signature related constants.
+const (
+ signV4Algorithm = "AWS4-HMAC-SHA256"
+ iso8601DateFormat = "20060102T150405Z"
+)
+
+const (
+ // Storage class header.
+ amzStorageClass = "X-Amz-Storage-Class"
+
+ // Website redirect location header
+ amzWebsiteRedirectLocation = "X-Amz-Website-Redirect-Location"
+
+ // Object Tagging headers
+ amzTaggingHeader = "X-Amz-Tagging"
+ amzTaggingHeaderDirective = "X-Amz-Tagging-Directive"
+
+ amzVersionID = "X-Amz-Version-Id"
+ amzTaggingCount = "X-Amz-Tagging-Count"
+ amzExpiration = "X-Amz-Expiration"
+ amzReplicationStatus = "X-Amz-Replication-Status"
+ amzDeleteMarker = "X-Amz-Delete-Marker"
+
+ // Object legal hold header
+ amzLegalHoldHeader = "X-Amz-Object-Lock-Legal-Hold"
+
+ // Object retention header
+ amzLockMode = "X-Amz-Object-Lock-Mode"
+ amzLockRetainUntil = "X-Amz-Object-Lock-Retain-Until-Date"
+ amzBypassGovernance = "X-Amz-Bypass-Governance-Retention"
+
+ // Replication status
+ amzBucketReplicationStatus = "X-Amz-Replication-Status"
+ // Minio specific Replication/lifecycle transition extension
+ minIOBucketSourceMTime = "X-Minio-Source-Mtime"
+
+ minIOBucketSourceETag = "X-Minio-Source-Etag"
+ minIOBucketReplicationDeleteMarker = "X-Minio-Source-DeleteMarker"
+ minIOBucketReplicationProxyRequest = "X-Minio-Source-Proxy-Request"
+ minIOBucketReplicationRequest = "X-Minio-Source-Replication-Request"
+)