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  /*
   * Copyright 2010-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License").
   * You may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *  http://aws.amazon.com/apache2.0
   *
  * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.s3;

Common S3 HTTP header values used throughout the AWS S3 Java client.
 
 public interface Headers {
 
     /*
      * Standard HTTP Headers
      */
 
     public static final String CACHE_CONTROL = "Cache-Control";
     public static final String CONTENT_DISPOSITION = "Content-Disposition";
     public static final String CONTENT_ENCODING = "Content-Encoding";
     public static final String CONTENT_LENGTH = "Content-Length";
     public static final String CONTENT_RANGE = "Content-Range";
     public static final String CONTENT_MD5 = "Content-MD5";
     public static final String CONTENT_TYPE = "Content-Type";
     public static final String DATE = "Date";
     public static final String ETAG = "ETag";
     public static final String LAST_MODIFIED = "Last-Modified";
     public static final String SERVER = "Server";
 
     /*
      * Amazon HTTP Headers
      */

    
Prefix for general Amazon headers: x-amz-
 
     public static final String AMAZON_PREFIX = "x-amz-";

    
S3's canned ACL header: x-amz-acl
 
     public static final String S3_CANNED_ACL = "x-amz-acl";

    
Amazon's alternative date header: x-amz-date
 
     public static final String S3_ALTERNATE_DATE = "x-amz-date";

    
Prefix for S3 user metadata: x-amz-meta-
 
     public static final String S3_USER_METADATA_PREFIX = "x-amz-meta-";

    
S3's version ID header
 
     public static final String S3_VERSION_ID = "x-amz-version-id";

    
S3's Multi-Factor Authentication header
 
     public static final String S3_MFA = "x-amz-mfa";

    
S3 response header for a request's AWS request ID
 
     public static final String REQUEST_ID = "x-amz-request-id";

    
S3 response header for a request's extended debugging ID
 
     public static final String EXTENDED_REQUEST_ID = "x-amz-id-2";

    
S3 request header indicating how to handle metadata when copying an object
 
     public static final String METADATA_DIRECTIVE = "x-amz-metadata-directive";

    
DevPay token header
 
     public static final String SECURITY_TOKEN = "x-amz-security-token";

    
Header describing what class of storage a user wants
 
     public static final String STORAGE_CLASS = "x-amz-storage-class";

    
Header for optional server-side encryption algorithm
 
     public static final String SERVER_SIDE_ENCRYPTION = "x-amz-server-side-encryption";

    
Header for the encryption algorithm used when encrypting the object with customer-provided keys
 
     public static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM = "x-amz-server-side-encryption-customer-algorithm";

    
Header for the customer-provided key for server-side encryption
 
     public static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY = "x-amz-server-side-encryption-customer-key";

    
Header for the MD5 digest of the customer-provided key for server-side encryption
 
     public static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5 = "x-amz-server-side-encryption-customer-key-MD5";

    
Header for the encryption algorithm used when encrypting the object with customer-provided keys
 
     public static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM = "x-amz-copy-source-server-side-encryption-customer-algorithm";

    
Header for the customer-provided key for server-side encryption
 
     public static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY = "x-amz-copy-source-server-side-encryption-customer-key";

    
Header for the MD5 digest of the customer-provided key for server-side encryption
 
     public static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5 = "x-amz-copy-source-server-side-encryption-customer-key-MD5";

    
Header for optional object expiration
 
     public static final String EXPIRATION = "x-amz-expiration";

    
Header for optional object expiration
 
    public static final String EXPIRES = "Expires";

    
ETag matching constraint header for the copy object request
    public static final String COPY_SOURCE_IF_MATCH = "x-amz-copy-source-if-match";

    
ETag non-matching constraint header for the copy object request
    public static final String COPY_SOURCE_IF_NO_MATCH = "x-amz-copy-source-if-none-match";

    
Unmodified since constraint header for the copy object request
    public static final String COPY_SOURCE_IF_UNMODIFIED_SINCE = "x-amz-copy-source-if-unmodified-since";

    
Modified since constraint header for the copy object request
    public static final String COPY_SOURCE_IF_MODIFIED_SINCE = "x-amz-copy-source-if-modified-since";

    
Range header for the get object request
    public static final String RANGE = "Range";

    
Range header for the copy part request
    public static final String COPY_PART_RANGE = "x-amz-copy-source-range";

    
Modified since constraint header for the get object request
    public static final String GET_OBJECT_IF_MODIFIED_SINCE = "If-Modified-Since";

    
Unmodified since constraint header for the get object request
    public static final String GET_OBJECT_IF_UNMODIFIED_SINCE = "If-Unmodified-Since";

    
ETag matching constraint header for the get object request
    public static final String GET_OBJECT_IF_MATCH = "If-Match";

    
ETag non-matching constraint header for the get object request
    public static final String GET_OBJECT_IF_NONE_MATCH = "If-None-Match";

    
Encrypted symmetric key header that is used in the Encryption Only (EO) envelope encryption mechanism.
    public static final String CRYPTO_KEY = "x-amz-key";

    
Encrypted symmetric key header that is used in the Authenticated Encryption (AE) cryptographic module. Older versions of S3 encryption client with encryption-only capability would not be able to recognize this AE key, and therefore will be prevented from mistakenly decrypting ciphertext in AE format.
    public static final String CRYPTO_KEY_V2 = "x-amz-key-v2";

    
Initialization vector (IV) header that is used in the symmetric and envelope encryption mechanisms
    public static final String CRYPTO_IV = "x-amz-iv";

    
JSON-encoded description of encryption materials used during encryption
    public static final String MATERIALS_DESCRIPTION = "x-amz-matdesc";

    
Instruction file header to be placed in the metadata of instruction files
    public static final String CRYPTO_INSTRUCTION_FILE = "x-amz-crypto-instr-file";

    
Header for the original, unencrypted size of an encrypted object
    public static final String UNENCRYPTED_CONTENT_LENGTH = "x-amz-unencrypted-content-length";

    
Header for the optional original unencrypted Content MD5 of an encrypted object
    public static final String UNENCRYPTED_CONTENT_MD5 = "x-amz-unencrypted-content-md5";

    
Header for optional redirect location of an object
    public static final String REDIRECT_LOCATION = "x-amz-website-redirect-location";

    
Header for the optional restore information of an object
    public static String RESTORE = "x-amz-restore";

    
Key wrapping algorithm such as "AESWrap" and "RSA/ECB/OAEPWithSHA-256AndMGF1Padding".
    public static final String CRYPTO_KEYWRAP_ALGORITHM = "x-amz-wrap-alg";
    
Content encryption algorithm, such as "AES/GCM/NoPadding".
    public static final String CRYPTO_CEK_ALGORITHM = "x-amz-cek-alg";
    
Tag length applicable to authenticated encrypt/decryption.
    public static final String CRYPTO_TAG_LENGTH = "x-amz-tag-len";

    
Headers in request indicating that the requester must be charged for data transfer.
    public static final String REQUESTER_PAYS_HEADER = "x-amz-request-payer";

    
Header in the response indicating that the requester has been charged for the request.
    public static final String REQUESTER_CHARGED_HEADER = "x-amz-request-charged";
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