Specify to return the object only if it's entity tag (ETag) is the same as the given value.

Specify to return the object only if it has been modified since the given date and time.

Specify to return the object only if it's entity tag (ETag) is different from the given value.

Specify to return the object only if it has not been modified since the given date and time.

Specifies the part number to retrieve.

Requests the specified range of bytes for an object.

Sets the Cache-Control header of the response.

Sets the Content-Encoding header of the response.

Sets the Content-Encoding header of the response.

Sets the Content-Language header of the response.

Sets the Content-Type header of the response.

Sets the Expires header of the response.

Specifies the algorithm to use when decrypting the object.

Specifies the customer-provided encryption key used for Amazon S3 to use in encrypting data. The value is used to when decrypting the object.

Specifies the 128-bit MD5 digest of the encryption key according to RFC 1321.