Headers (cos-java-sdk 5.6.255 API)

```
public interface Headers
```
Common COS HTTP header values used throughout the COS Java client.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`APPEND_OBJECT_NEXT_POSISTION`
`static String`	`BUCKET_ARCH` COS response header for merge bucket type
`static String`	`BUCKET_AZ_TYPE`
`static String`	`CACHE_CONTROL`
`static String`	`CI_REQUEST_ID` CI response header for a request's ci request ID
`static String`	`CONNECTION`
`static String`	`CONTENT_DISPOSITION`
`static String`	`CONTENT_ENCODING`
`static String`	`CONTENT_LANGUAGE`
`static String`	`CONTENT_LENGTH`
`static String`	`CONTENT_MD5`
`static String`	`CONTENT_RANGE`
`static String`	`CONTENT_TYPE`
`static String`	`COPY_PART_RANGE` Range header for the copy part request
`static String`	`COPY_SOURCE_IF_MATCH` ETag matching constraint header for the copy object request
`static String`	`COPY_SOURCE_IF_MODIFIED_SINCE` Modified since constraint header for the copy object request
`static String`	`COPY_SOURCE_IF_NO_MATCH` ETag non-matching constraint header for the copy object request
`static String`	`COPY_SOURCE_IF_UNMODIFIED_SINCE` Unmodified since constraint header for the copy object request
`static String`	`COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM` Header for the encryption algorithm used when encrypting the object with customer-provided keys
`static String`	`COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY` Header for the customer-provided key for server-side encryption
`static String`	`COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5` Header for the MD5 digest of the customer-provided key for server-side encryption
`static String`	`COS_ALTERNATE_DATE` Cos's alternative date header: x-cos-date
`static String`	`COS_AUTHORIZATION` COS's Multi-Factor Authentication header
`static String`	`COS_BUCKET_REGION` Region where the bucket is located.
`static String`	`COS_CANNED_ACL` COS's canned ACL header: x-cos-acl
`static String`	`COS_HASH_CRC32_C`
`static String`	`COS_HASH_CRC64_ECMA` part or object crc64
`static String`	`COS_PREFIX` Prefix for general COS headers: x-cos-
`static String`	`COS_TRAFFIC_LIMIT` COS traffic limit header
`static String`	`COS_USER_METADATA_PREFIX` Prefix for COS user metadata: x-cos-meta-
`static String`	`COS_VERSION_ID` COS's version ID header
`static String`	`CRYPTO_CEK_ALGORITHM` Content encryption algorithm, such as "AES/GCM/NoPadding".
`static String`	`CRYPTO_INSTRUCTION_FILE` Instruction file header to be placed in the metadata of instruction files
`static String`	`CRYPTO_IV` Initialization vector (IV) header that is used in the symmetric and envelope encryption mechanisms
`static String`	`CRYPTO_KEY` Encrypted symmetric key header that is used in the envelope encryption mechanism
`static String`	`CRYPTO_KEY_V2` Encrypted symmetric key header that is used in the Authenticated Encryption (AE) cryptographic module.
`static String`	`CRYPTO_KEYWRAP_ALGORITHM` Key wrapping algorithm such as "AESWrap" and "RSA/ECB/OAEPWithSHA-256AndMGF1Padding".
`static String`	`CRYPTO_TAG_LENGTH` Tag length applicable to authenticated encrypt/decryption.
`static String`	`DATE`
`static String`	`DELETE_MARKER` Header for the optional delete marker information of an object
`static String`	`ENCRYPTION_CEK_ALG`
`static String`	`ENCRYPTION_DATA_SIZE`
`static String`	`ENCRYPTION_KEY`
`static String`	`ENCRYPTION_MATDESC`
`static String`	`ENCRYPTION_PART_SIZE`
`static String`	`ENCRYPTION_START`
`static String`	`ENCRYPTION_UNENCRYPTED_CONTENT_LENGTH`
`static String`	`ENCRYPTION_UNENCRYPTED_CONTENT_MD5`
`static String`	`ENCRYPTION_WRAP_ALG`
`static String`	`ETAG`
`static String`	`EXPIRATION` Header for optional object expiration
`static String`	`EXPIRES` Header for optional object expiration
`static String`	`FILE_MODE_DIR`
`static String`	`GET_OBJECT_IF_MATCH` ETag matching constraint header for the get object request
`static String`	`GET_OBJECT_IF_MODIFIED_SINCE` Modified since constraint header for the get object request
`static String`	`GET_OBJECT_IF_NONE_MATCH` ETag non-matching constraint header for the get object request
`static String`	`GET_OBJECT_IF_UNMODIFIED_SINCE` Unmodified since constraint header for the get object request
`static String`	`HOST`
`static String`	`INODE_ID`
`static String`	`LAST_MODIFIED`
`static String`	`MATERIALS_DESCRIPTION` JSON-encoded description of encryption materials used during encryption
`static String`	`METADATA_DIRECTIVE` COS request header indicating how to handle metadata when copying an object
`static String`	`PIC_OPERATIONS`
`static String`	`RANGE` Range header for the get object request
`static String`	`REDIRECT_LOCATION` Header for optional redirect location of an object
`static String`	`REQUEST_ID` COS response header for a request's cos request ID
`static String`	`RESTORE` Header for the optional restore information of an object
`static String`	`SDK_LOG_DEBUG`
`static String`	`SECURITY_TOKEN` DevPay token header
`static String`	`SERVER`
`static String`	`SERVER_SIDE_ENCRYPTION` Header for optional server-side encryption algorithm
`static String`	`SERVER_SIDE_ENCRYPTION_CONTEXT`
`static String`	`SERVER_SIDE_ENCRYPTION_COS_KMS_KEY_ID`
`static String`	`SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM` Header for the encryption algorithm used when encrypting the object with customer-provided keys
`static String`	`SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY` Header for the customer-provided key for server-side encryption
`static String`	`SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5` Header for the MD5 digest of the customer-provided key for server-side encryption
`static String`	`SERVER_SIDE_ENCRYPTION_QCLOUD_KMS_KEYID` Header in the request and response indicating the QCLOUD Key Management System key id used for Server Side Encryption.
`static String`	`STORAGE_CLASS` Header describing what class of storage a user wants
`static String`	`SYMLINK_TARGET`
`static String`	`TRACE_ID` COS response header for TRACE ID
`static String`	`UNENCRYPTED_CONTENT_LENGTH` Header for the original, unencrypted size of an encrypted object
`static String`	`UNENCRYPTED_CONTENT_MD5` Header for the optional original unencrypted Content MD5 of an encrypted object
`static String`	`USER_AGENT`

- Field Detail
  - HOST
```
static final String HOST
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL
```
static final String CACHE_CONTROL
```
    See Also:
    
    Constant Field Values
  - CONTENT_DISPOSITION
```
static final String CONTENT_DISPOSITION
```
    See Also:
    
    Constant Field Values
  - CONTENT_ENCODING
```
static final String CONTENT_ENCODING
```
    See Also:
    
    Constant Field Values
  - CONTENT_LENGTH
```
static final String CONTENT_LENGTH
```
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
static final String CONTENT_RANGE
```
    See Also:
    
    Constant Field Values
  - CONTENT_MD5
```
static final String CONTENT_MD5
```
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE
```
static final String CONTENT_TYPE
```
    See Also:
    
    Constant Field Values
  - CONTENT_LANGUAGE
```
static final String CONTENT_LANGUAGE
```
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    Constant Field Values
  - DATE
```
static final String DATE
```
    See Also:
    
    Constant Field Values
  - ETAG
```
static final String ETAG
```
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
static final String LAST_MODIFIED
```
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    Constant Field Values
  - SERVER
```
static final String SERVER
```
    See Also:
    
    Constant Field Values
  - USER_AGENT
```
static final String USER_AGENT
```
    See Also:
    
    Constant Field Values
  - SDK_LOG_DEBUG
```
static final String SDK_LOG_DEBUG
```
    See Also:
    
    Constant Field Values
  - FILE_MODE_DIR
```
static final String FILE_MODE_DIR
```
    See Also:
    
    Constant Field Values
  - CONNECTION
```
static final String CONNECTION
```
    See Also:
    
    Constant Field Values
  - COS_PREFIX
```
static final String COS_PREFIX
```
    Prefix for general COS headers: x-cos-
    
    See Also:
    
    Constant Field Values
  - COS_CANNED_ACL
```
static final String COS_CANNED_ACL
```
    COS's canned ACL header: x-cos-acl
    
    See Also:
    
    Constant Field Values
  - COS_ALTERNATE_DATE
```
static final String COS_ALTERNATE_DATE
```
    Cos's alternative date header: x-cos-date
    
    See Also:
    
    Constant Field Values
  - COS_HASH_CRC64_ECMA
```
static final String COS_HASH_CRC64_ECMA
```
    part or object crc64
    
    See Also:
    
    Constant Field Values
  - COS_HASH_CRC32_C
```
static final String COS_HASH_CRC32_C
```
    See Also:
    
    Constant Field Values
  - COS_USER_METADATA_PREFIX
```
static final String COS_USER_METADATA_PREFIX
```
    Prefix for COS user metadata: x-cos-meta-
    
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    Constant Field Values
  - COS_VERSION_ID
```
static final String COS_VERSION_ID
```
    COS's version ID header
    
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    Constant Field Values
  - COS_AUTHORIZATION
```
static final String COS_AUTHORIZATION
```
    COS's Multi-Factor Authentication header
    
    See Also:
    
    Constant Field Values
  - COS_TRAFFIC_LIMIT
```
static final String COS_TRAFFIC_LIMIT
```
    COS traffic limit header
    
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    Constant Field Values
  - REQUEST_ID
```
static final String REQUEST_ID
```
    COS response header for a request's cos request ID
    
    See Also:
    
    Constant Field Values
  - CI_REQUEST_ID
```
static final String CI_REQUEST_ID
```
    CI response header for a request's ci request ID
    
    See Also:
    
    Constant Field Values
  - TRACE_ID
```
static final String TRACE_ID
```
    COS response header for TRACE ID
    
    See Also:
    
    Constant Field Values
  - BUCKET_ARCH
```
static final String BUCKET_ARCH
```
    COS response header for merge bucket type
    
    See Also:
    
    Constant Field Values
  - BUCKET_AZ_TYPE
```
static final String BUCKET_AZ_TYPE
```
    See Also:
    
    Constant Field Values
  - METADATA_DIRECTIVE
```
static final String METADATA_DIRECTIVE
```
    COS request header indicating how to handle metadata when copying an object
    
    See Also:
    
    Constant Field Values
  - SECURITY_TOKEN
```
static final String SECURITY_TOKEN
```
    DevPay token header
    
    See Also:
    
    Constant Field Values
  - STORAGE_CLASS
```
static final String STORAGE_CLASS
```
    Header describing what class of storage a user wants
    
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION
```
static final String SERVER_SIDE_ENCRYPTION
```
    Header for optional server-side encryption algorithm
    
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM
```
static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM
```
    Header for the encryption algorithm used when encrypting the object with customer-provided keys
    
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY
```
static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY
```
    Header for the customer-provided key for server-side encryption
    
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_COS_KMS_KEY_ID
```
static final String SERVER_SIDE_ENCRYPTION_COS_KMS_KEY_ID
```
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_CONTEXT
```
static final String SERVER_SIDE_ENCRYPTION_CONTEXT
```
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5
```
static final String SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5
```
    Header for the MD5 digest of the customer-provided key for server-side encryption
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM
```
static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM
```
    Header for the encryption algorithm used when encrypting the object with customer-provided keys
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY
```
static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY
```
    Header for the customer-provided key for server-side encryption
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5
```
static final String COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5
```
    Header for the MD5 digest of the customer-provided key for server-side encryption
    
    See Also:
    
    Constant Field Values
  - EXPIRATION
```
static final String EXPIRATION
```
    Header for optional object expiration
    
    See Also:
    
    Constant Field Values
  - EXPIRES
```
static final String EXPIRES
```
    Header for optional object expiration
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_IF_MATCH
```
static final String COPY_SOURCE_IF_MATCH
```
    ETag matching constraint header for the copy object request
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_IF_NO_MATCH
```
static final String COPY_SOURCE_IF_NO_MATCH
```
    ETag non-matching constraint header for the copy object request
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_IF_UNMODIFIED_SINCE
```
static final String COPY_SOURCE_IF_UNMODIFIED_SINCE
```
    Unmodified since constraint header for the copy object request
    
    See Also:
    
    Constant Field Values
  - COPY_SOURCE_IF_MODIFIED_SINCE
```
static final String COPY_SOURCE_IF_MODIFIED_SINCE
```
    Modified since constraint header for the copy object request
    
    See Also:
    
    Constant Field Values
  - RANGE
```
static final String RANGE
```
    Range header for the get object request
    
    See Also:
    
    Constant Field Values
  - COPY_PART_RANGE
```
static final String COPY_PART_RANGE
```
    Range header for the copy part request
    
    See Also:
    
    Constant Field Values
  - GET_OBJECT_IF_MODIFIED_SINCE
```
static final String GET_OBJECT_IF_MODIFIED_SINCE
```
    Modified since constraint header for the get object request
    
    See Also:
    
    Constant Field Values
  - GET_OBJECT_IF_UNMODIFIED_SINCE
```
static final String GET_OBJECT_IF_UNMODIFIED_SINCE
```
    Unmodified since constraint header for the get object request
    
    See Also:
    
    Constant Field Values
  - GET_OBJECT_IF_MATCH
```
static final String GET_OBJECT_IF_MATCH
```
    ETag matching constraint header for the get object request
    
    See Also:
    
    Constant Field Values
  - GET_OBJECT_IF_NONE_MATCH
```
static final String GET_OBJECT_IF_NONE_MATCH
```
    ETag non-matching constraint header for the get object request
    
    See Also:
    
    Constant Field Values
  - CRYPTO_KEY
```
static final String CRYPTO_KEY
```
    Encrypted symmetric key header that is used in the envelope encryption mechanism
    
    See Also:
    
    Constant Field Values
  - APPEND_OBJECT_NEXT_POSISTION
```
static final String APPEND_OBJECT_NEXT_POSISTION
```
    See Also:
    
    Constant Field Values
  - CRYPTO_KEY_V2
```
static final String CRYPTO_KEY_V2
```
    Encrypted symmetric key header that is used in the Authenticated Encryption (AE) cryptographic module. Older versions of COS 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.
    
    See Also:
    
    Constant Field Values
  - CRYPTO_IV
```
static final String CRYPTO_IV
```
    Initialization vector (IV) header that is used in the symmetric and envelope encryption mechanisms
    
    See Also:
    
    Constant Field Values
  - MATERIALS_DESCRIPTION
```
static final String MATERIALS_DESCRIPTION
```
    JSON-encoded description of encryption materials used during encryption
    
    See Also:
    
    Constant Field Values
  - CRYPTO_INSTRUCTION_FILE
```
static final String CRYPTO_INSTRUCTION_FILE
```
    Instruction file header to be placed in the metadata of instruction files
    
    See Also:
    
    Constant Field Values
  - UNENCRYPTED_CONTENT_LENGTH
```
static final String UNENCRYPTED_CONTENT_LENGTH
```
    Header for the original, unencrypted size of an encrypted object
    
    See Also:
    
    Constant Field Values
  - UNENCRYPTED_CONTENT_MD5
```
static final String UNENCRYPTED_CONTENT_MD5
```
    Header for the optional original unencrypted Content MD5 of an encrypted object
    
    See Also:
    
    Constant Field Values
  - SERVER_SIDE_ENCRYPTION_QCLOUD_KMS_KEYID
```
static final String SERVER_SIDE_ENCRYPTION_QCLOUD_KMS_KEYID
```
    Header in the request and response indicating the QCLOUD Key Management System key id used for Server Side Encryption.
    
    See Also:
    
    Constant Field Values
  - REDIRECT_LOCATION
```
static final String REDIRECT_LOCATION
```
    Header for optional redirect location of an object
    
    See Also:
    
    Constant Field Values
  - RESTORE
```
static final String RESTORE
```
    Header for the optional restore information of an object
    
    See Also:
    
    Constant Field Values
  - DELETE_MARKER
```
static final String DELETE_MARKER
```
    Header for the optional delete marker information of an object
    
    See Also:
    
    Constant Field Values
  - CRYPTO_KEYWRAP_ALGORITHM
```
static final String CRYPTO_KEYWRAP_ALGORITHM
```
    Key wrapping algorithm such as "AESWrap" and "RSA/ECB/OAEPWithSHA-256AndMGF1Padding".
    
    See Also:
    
    Constant Field Values
  - CRYPTO_CEK_ALGORITHM
```
static final String CRYPTO_CEK_ALGORITHM
```
    Content encryption algorithm, such as "AES/GCM/NoPadding".
    
    See Also:
    
    Constant Field Values
  - CRYPTO_TAG_LENGTH
```
static final String CRYPTO_TAG_LENGTH
```
    Tag length applicable to authenticated encrypt/decryption.
    
    See Also:
    
    Constant Field Values
  - COS_BUCKET_REGION
```
static final String COS_BUCKET_REGION
```
    Region where the bucket is located. This header is returned only in HEAD bucket and ListObjects response.
    
    See Also:
    
    Constant Field Values
  - PIC_OPERATIONS
```
static final String PIC_OPERATIONS
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_KEY
```
static final String ENCRYPTION_KEY
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_START
```
static final String ENCRYPTION_START
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_CEK_ALG
```
static final String ENCRYPTION_CEK_ALG
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_WRAP_ALG
```
static final String ENCRYPTION_WRAP_ALG
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_MATDESC
```
static final String ENCRYPTION_MATDESC
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_UNENCRYPTED_CONTENT_LENGTH
```
static final String ENCRYPTION_UNENCRYPTED_CONTENT_LENGTH
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_UNENCRYPTED_CONTENT_MD5
```
static final String ENCRYPTION_UNENCRYPTED_CONTENT_MD5
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_DATA_SIZE
```
static final String ENCRYPTION_DATA_SIZE
```
    See Also:
    
    Constant Field Values
  - ENCRYPTION_PART_SIZE
```
static final String ENCRYPTION_PART_SIZE
```
    See Also:
    
    Constant Field Values
  - SYMLINK_TARGET
```
static final String SYMLINK_TARGET
```
    See Also:
    
    Constant Field Values
  - INODE_ID
```
static final String INODE_ID
```
    See Also:
    
    Constant Field Values

Interface Headers

Field Summary

Field Detail

HOST

CACHE_CONTROL

CONTENT_DISPOSITION

CONTENT_ENCODING

CONTENT_LENGTH

CONTENT_RANGE

CONTENT_MD5

CONTENT_TYPE

CONTENT_LANGUAGE

DATE

ETAG

LAST_MODIFIED

SERVER

USER_AGENT

SDK_LOG_DEBUG

FILE_MODE_DIR

CONNECTION

COS_PREFIX

COS_CANNED_ACL

COS_ALTERNATE_DATE

COS_HASH_CRC64_ECMA

COS_HASH_CRC32_C

COS_USER_METADATA_PREFIX

COS_VERSION_ID

COS_AUTHORIZATION

COS_TRAFFIC_LIMIT

REQUEST_ID

CI_REQUEST_ID

TRACE_ID

BUCKET_ARCH

BUCKET_AZ_TYPE

METADATA_DIRECTIVE

SECURITY_TOKEN

STORAGE_CLASS

SERVER_SIDE_ENCRYPTION

SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM

SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY

SERVER_SIDE_ENCRYPTION_COS_KMS_KEY_ID

SERVER_SIDE_ENCRYPTION_CONTEXT

SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5

COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_ALGORITHM

COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY

COPY_SOURCE_SERVER_SIDE_ENCRYPTION_CUSTOMER_KEY_MD5

EXPIRATION

EXPIRES

COPY_SOURCE_IF_MATCH

COPY_SOURCE_IF_NO_MATCH

COPY_SOURCE_IF_UNMODIFIED_SINCE

COPY_SOURCE_IF_MODIFIED_SINCE

RANGE

COPY_PART_RANGE

GET_OBJECT_IF_MODIFIED_SINCE

GET_OBJECT_IF_UNMODIFIED_SINCE

GET_OBJECT_IF_MATCH

GET_OBJECT_IF_NONE_MATCH

CRYPTO_KEY

APPEND_OBJECT_NEXT_POSISTION

CRYPTO_KEY_V2

CRYPTO_IV

MATERIALS_DESCRIPTION

CRYPTO_INSTRUCTION_FILE

UNENCRYPTED_CONTENT_LENGTH

UNENCRYPTED_CONTENT_MD5

SERVER_SIDE_ENCRYPTION_QCLOUD_KMS_KEYID

REDIRECT_LOCATION

RESTORE

DELETE_MARKER

CRYPTO_KEYWRAP_ALGORITHM

CRYPTO_CEK_ALGORITHM

CRYPTO_TAG_LENGTH

COS_BUCKET_REGION

PIC_OPERATIONS

ENCRYPTION_KEY

ENCRYPTION_START

ENCRYPTION_CEK_ALG

ENCRYPTION_WRAP_ALG

ENCRYPTION_MATDESC