// Copyright (c) 2015-2021 MinIO, Inc.//// This file is part of MinIO Object Storage stack//// This program is free software: you can redistribute it and/or modify// it under the terms of the GNU Affero General Public License as published by// the Free Software Foundation, either version 3 of the License, or// (at your option) any later version.//// This program is distributed in the hope that it will be useful// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the// GNU Affero General Public License for more details.//// You should have received a copy of the GNU Affero General Public License// along with this program.  If not, see <http://www.gnu.org/licenses/>. package http // Standard S3 HTTP response constantsconst (	LastModified       = "Last-Modified"	Date               = "Date"	ETag               = "ETag"	ContentType        = "Content-Type"	ContentMD5         = "Content-Md5"	ContentEncoding    = "Content-Encoding"	Expires            = "Expires"	ContentLength      = "Content-Length"	ContentLanguage    = "Content-Language"	ContentRange       = "Content-Range"	Connection         = "Connection"	AcceptRanges       = "Accept-Ranges"	AmzBucketRegion    = "X-Amz-Bucket-Region"	ServerInfo         = "Server"	RetryAfter         = "Retry-After"	Location           = "Location"	CacheControl       = "Cache-Control"	ContentDisposition = "Content-Disposition"	Authorization      = "Authorization"	Action             = "Action"	Range              = "Range") // Non standard S3 HTTP response constantsconst (	XCache       = "X-Cache"	XCacheLookup = "X-Cache-Lookup") // Standard S3 HTTP request constantsconst (	IfModifiedSince   = "If-Modified-Since"	IfUnmodifiedSince = "If-Unmodified-Since"	IfMatch           = "If-Match"	IfNoneMatch       = "If-None-Match" 	// S3 storage class	AmzStorageClass = "x-amz-storage-class" 	// S3 object version ID	AmzVersionID    = "x-amz-version-id"	AmzDeleteMarker = "x-amz-delete-marker" 	// S3 object tagging	AmzObjectTagging = "X-Amz-Tagging"	AmzTagCount      = "x-amz-tagging-count"	AmzTagDirective  = "X-Amz-Tagging-Directive" 	// S3 transition restore	AmzRestore            = "x-amz-restore"	AmzRestoreExpiryDays  = "X-Amz-Restore-Expiry-Days"	AmzRestoreRequestDate = "X-Amz-Restore-Request-Date"	AmzRestoreOutputPath  = "x-amz-restore-output-path" 	// S3 extensions	AmzCopySourceIfModifiedSince   = "x-amz-copy-source-if-modified-since"	AmzCopySourceIfUnmodifiedSince = "x-amz-copy-source-if-unmodified-since" 	AmzCopySourceIfNoneMatch = "x-amz-copy-source-if-none-match"	AmzCopySourceIfMatch     = "x-amz-copy-source-if-match" 	AmzCopySource                 = "X-Amz-Copy-Source"	AmzCopySourceVersionID        = "X-Amz-Copy-Source-Version-Id"	AmzCopySourceRange            = "X-Amz-Copy-Source-Range"	AmzMetadataDirective          = "X-Amz-Metadata-Directive"	AmzObjectLockMode             = "X-Amz-Object-Lock-Mode"	AmzObjectLockRetainUntilDate  = "X-Amz-Object-Lock-Retain-Until-Date"	AmzObjectLockLegalHold        = "X-Amz-Object-Lock-Legal-Hold"	AmzObjectLockBypassGovernance = "X-Amz-Bypass-Governance-Retention"	AmzBucketReplicationStatus    = "X-Amz-Replication-Status"	AmzSnowballExtract            = "X-Amz-Meta-Snowball-Auto-Extract" 	// Object lock enabled	AmzObjectLockEnabled = "x-amz-bucket-object-lock-enabled" 	// Multipart parts count	AmzMpPartsCount = "x-amz-mp-parts-count" 	// Object date/time of expiration	AmzExpiration = "x-amz-expiration" 	// Dummy putBucketACL	AmzACL = "x-amz-acl" 	// Signature V4 related contants.	AmzContentSha256        = "X-Amz-Content-Sha256"	AmzDate                 = "X-Amz-Date"	AmzAlgorithm            = "X-Amz-Algorithm"	AmzExpires              = "X-Amz-Expires"	AmzSignedHeaders        = "X-Amz-SignedHeaders"	AmzSignature            = "X-Amz-Signature"	AmzCredential           = "X-Amz-Credential"	AmzSecurityToken        = "X-Amz-Security-Token"	AmzDecodedContentLength = "X-Amz-Decoded-Content-Length" 	AmzMetaUnencryptedContentLength = "X-Amz-Meta-X-Amz-Unencrypted-Content-Length"	AmzMetaUnencryptedContentMD5    = "X-Amz-Meta-X-Amz-Unencrypted-Content-Md5" 	// AWS server-side encryption headers for SSE-S3, SSE-KMS and SSE-C.	AmzServerSideEncryption                      = "X-Amz-Server-Side-Encryption"	AmzServerSideEncryptionKmsID                 = AmzServerSideEncryption + "-Aws-Kms-Key-Id"	AmzServerSideEncryptionKmsContext            = AmzServerSideEncryption + "-Context"	AmzServerSideEncryptionCustomerAlgorithm     = AmzServerSideEncryption + "-Customer-Algorithm"	AmzServerSideEncryptionCustomerKey           = AmzServerSideEncryption + "-Customer-Key"	AmzServerSideEncryptionCustomerKeyMD5        = AmzServerSideEncryption + "-Customer-Key-Md5"	AmzServerSideEncryptionCopyCustomerAlgorithm = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm"	AmzServerSideEncryptionCopyCustomerKey       = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key"	AmzServerSideEncryptionCopyCustomerKeyMD5    = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5" 	AmzEncryptionAES = "AES256"	AmzEncryptionKMS = "aws:kms" 	// Signature v2 related constants	AmzSignatureV2 = "Signature"	AmzAccessKeyID = "AWSAccessKeyId" 	// Response request id.	AmzRequestID = "x-amz-request-id" 	// Deployment id.	MinioDeploymentID = "x-minio-deployment-id" 	// Server-Status	MinIOServerStatus = "x-minio-server-status" 	// Delete special flag to force delete a bucket or a prefix	MinIOForceDelete = "x-minio-force-delete" 	// Create special flag to force create a bucket	MinIOForceCreate = "x-minio-force-create" 	// Header indicates if the mtime should be preserved by client	MinIOSourceMTime = "x-minio-source-mtime" 	// Header indicates if the etag should be preserved by client	MinIOSourceETag = "x-minio-source-etag" 	// Writes expected write quorum	MinIOWriteQuorum = "x-minio-write-quorum" 	// Reports number of drives currently healing	MinIOHealingDrives = "x-minio-healing-drives" 	// Header indicates if the delete marker should be preserved by client	MinIOSourceDeleteMarker = "x-minio-source-deletemarker" 	// Header indicates if the delete marker version needs to be purged.	MinIOSourceDeleteMarkerDelete = "x-minio-source-deletemarker-delete" 	// Header indicates permanent delete replication status.	MinIODeleteReplicationStatus = "X-Minio-Replication-Delete-Status"	// Header indicates delete-marker replication status.	MinIODeleteMarkerReplicationStatus = "X-Minio-Replication-DeleteMarker-Status"	// Header indicates if its a GET/HEAD proxy request for active-active replication	MinIOSourceProxyRequest = "X-Minio-Source-Proxy-Request"	// Header indicates that this request is a replication request to create a REPLICA	MinIOSourceReplicationRequest = "X-Minio-Source-Replication-Request"	// Header indicates replication reset status.	MinIOReplicationResetStatus = "X-Minio-Replication-Reset-Status" 	// Header indiicates last tag update time on source	MinIOSourceTaggingTimestamp = "X-Minio-Source-Replication-Tagging-Timestamp"	// Header indiicates last rtention update time on source	MinIOSourceObjectRetentionTimestamp = "X-Minio-Source-Replication-Retention-Timestamp"	// Header indiicates last rtention update time on source	MinIOSourceObjectLegalHoldTimestamp = "X-Minio-Source-Replication-LegalHold-Timestamp"	// predicted date/time of transition	MinIOTransition = "X-Minio-Transition" 	// MinIOCompressed is returned when object is compressed	MinIOCompressed = "X-Minio-Compressed") // Common http query params S3 APIconst (	VersionID = "versionId" 	PartNumber = "partNumber" 	UploadID = "uploadId") // http headers sent to webhook targetsconst (	// Reports the version of MinIO server	MinIOVersion = "x-minio-version")