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ceph/doc/api/s3/objectops.rst
John Wilkins 68874afaaa doc: Filled in descriptions for object operations. 
Signed-off-by: John Wilkins <john.wilkins@inktank.com>
2012-05-25 16:03:02 -07:00

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Object Operations
=================
Put Object
----------
Adds an object to a bucket. You must have write permissions on the bucket to perform this operation.
Syntax
~~~~~~
::
PUT /{bucket}/{object} HTTP/1.1
Request Headers
~~~~~~~~~~~~~~~
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| Name | Description | Valid Values | Required |
+======================+============================================+===============================================================================+============+
| **content-md5** | A base64 encoded MD-5 hash of the message. | A string. No defaults or constraints. | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **content-type** | A standard MIME type. | Any MIME type. Default: ``binary/octet-stream`` | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **x-amz-meta-<...>** | User metadata. Stored with the object. | A string up to 8kb. No defaults. | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **x-amz-acl** | A canned ACL. | ``private``, ``public-read``, ``public-read-write``, ``authenticated-read`` | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
Copy Object
-----------
To copy an object, use ``PUT`` and specify a destination bucket and the object name.
Syntax
~~~~~~
::
PUT /{dest-bucket}/{dest-object} HTTP/1.1
x-amz-copy-source: {source-bucket}/{source-object}
Request Headers
~~~~~~~~~~~~~~~
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| Name | Description | Valid Values | Required |
+======================================+=================================================+========================+============+
| **x-amz-copy-source** | The source bucket name + object name. | {bucket}/{obj} | Yes |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| **x-amz-acl** | A canned ACL. | ``private``, | No |
| | | ``public-read``, | |
| | | ``public-read-write``, | |
| | | ``authenticated-read`` | |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| **x-amz-copy-if-modified-since** | Copies only if modified since the timestamp. | Timestamp | No |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| **x-amz-copy-if-unmodified-since** | Copies only if unmodified since the timestamp. | Timestamp | No |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| **x-amz-copy-if-match** | Copies only if object ETag matches ETag. | Entity Tag | No |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
| **x-amz-copy-if-none-match** | Copies only if object ETag doesn't match. | Entity Tag | No |
+--------------------------------------+-------------------------------------------------+------------------------+------------+
Response Entities
~~~~~~~~~~~~~~~~~
+------------------------+-------------+-----------------------------------------------+
| Name | Type | Description |
+========================+=============+===============================================+
| **CopyObjectResult** | Container | A container for the response elements. |
+------------------------+-------------+-----------------------------------------------+
| **LastModified** | Date | The last modified date of the source object. |
+------------------------+-------------+-----------------------------------------------+
| **Etag** | String | The ETag of the new object. |
+------------------------+-------------+-----------------------------------------------+
Remove Object
-------------
Removes an object. Requires WRITE permission set on the containing bucket.
Syntax
~~~~~~
::
DELETE /{bucket}/{object} HTTP/1.1
Get Object
----------
Retrieves an object from a bucket within RADOS.
Syntax
~~~~~~
::
GET /{bucket}/{object} HTTP/1.1
Request Headers
~~~~~~~~~~~~~~~
+---------------------------+------------------------------------------------+--------------------------------+------------+
| Name | Description | Valid Values | Required |
+===========================+================================================+================================+============+
| **range** | The range of the object to retrieve. | Range: bytes=beginbyte-endbyte | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-modified-since** | Gets only if modified since the timestamp. | Timestamp | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-unmodified-since** | Gets only if not modified since the timestamp. | Timestamp | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-match** | Gets only if object ETag matches ETag. | Entity Tag | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-none-match** | Gets only if object ETag matches ETag. | Entity Tag | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
Response Headers
~~~~~~~~~~~~~~~~
+-------------------+--------------------------------------------------------------------------------------------+
| Name | Description |
+===================+============================================================================================+
| **Content-Range** | Data range, will only be returned if the range header field was specified in the request |
+-------------------+--------------------------------------------------------------------------------------------+
Get Object Info
---------------
Returns information about object. This request will return the same
header information as with the Get Object request, but will include
the metadata only, not the object data payload.
Syntax
~~~~~~
::
HEAD /{bucket}/{object} HTTP/1.1
Request Headers
~~~~~~~~~~~~~~~
+---------------------------+------------------------------------------------+--------------------------------+------------+
| Name | Description | Valid Values | Required |
+===========================+================================================+================================+============+
| **range** | The range of the object to retrieve. | Range: bytes=beginbyte-endbyte | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-modified-since** | Gets only if modified since the timestamp. | Timestamp | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-unmodified-since** | Gets only if not modified since the timestamp. | Timestamp | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-match** | Gets only if object ETag matches ETag. | Entity Tag | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
| **if-none-match** | Gets only if object ETag matches ETag. | Entity Tag | No |
+---------------------------+------------------------------------------------+--------------------------------+------------+
Get Object ACL
--------------
Syntax
~~~~~~
::
GET /{bucket}/{object}?acl HTTP/1.1
Response Entities
~~~~~~~~~~~~~~~~~
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| Name | Type | Description |
+===========================+=============+==============================================================================================+
| ``AccessControlPolicy`` | Container | A container for the response. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``AccessControlList`` | Container | A container for the ACL information. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Owner`` | Container | A container for the object owner's ``ID`` and ``DisplayName``. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``ID`` | String | The object owner's ID. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``DisplayName`` | String | The object owner's display name. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Grant`` | Container | A container for ``Grantee`` and ``Permission``. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Grantee`` | Container | A container for the ``DisplayName`` and ``ID`` of the user receiving a grant of permission. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Permission`` | String | The permission given to the ``Grantee`` object. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
Set Object ACL
--------------
Syntax
~~~~~~
::
PUT /{bucket}/{object}?acl
Request Entities
~~~~~~~~~~~~~~~~
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| Name | Type | Description |
+===========================+=============+==============================================================================================+
| ``AccessControlPolicy`` | Container | A container for the response. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``AccessControlList`` | Container | A container for the ACL information. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Owner`` | Container | A container for the object owner's ``ID`` and ``DisplayName``. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``ID`` | String | The object owner's ID. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``DisplayName`` | String | The object owner's display name. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Grant`` | Container | A container for ``Grantee`` and ``Permission``. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Grantee`` | Container | A container for the ``DisplayName`` and ``ID`` of the user receiving a grant of permission. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
| ``Permission`` | String | The permission given to the ``Grantee`` object. |
+---------------------------+-------------+----------------------------------------------------------------------------------------------+
Initiate Multi-part Upload
--------------------------
Initiate a multi-part upload process.
Syntax
~~~~~~
::
POST /{bucket}/{object}?uploads
Request Headers
~~~~~~~~~~~~~~~
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| Name | Description | Valid Values | Required |
+======================+============================================+===============================================================================+============+
| **content-md5** | A base64 encoded MD-5 hash of the message. | A string. No defaults or constraints. | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **content-type** | A standard MIME type. | Any MIME type. Default: ``binary/octet-stream`` | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **x-amz-meta-<...>** | User metadata. Stored with the object. | A string up to 8kb. No defaults. | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
| **x-amz-acl** | A canned ACL. | ``private``, ``public-read``, ``public-read-write``, ``authenticated-read`` | No |
+----------------------+--------------------------------------------+-------------------------------------------------------------------------------+------------+
Response Entities
~~~~~~~~~~~~~~~~~
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| Name | Type | Description |
+=========================================+=============+==========================================================================================================+
| ``InitiatedMultipartUploadsResult`` | Container | A container for the results. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Bucket`` | String | The bucket that will receive the object contents. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Key`` | String | The key specified by the ``key`` request parameter (if any). |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``UploadId`` | String | The ID specified by the ``upload-id`` request parameter identifying the multipart upload (if any). |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
Multipart Upload Part
---------------------
Syntax
~~~~~~
::
PUT /{bucket}/{object}?partNumber=&uploadId= HTTP/1.1
HTTP Response
~~~~~~~~~~~~~
The following HTTP response may be returned:
+---------------+----------------+--------------------------------------------------------------------------+
| HTTP Status | Status Code | Description |
+===============+================+==========================================================================+
| **404** | NoSuchUpload | Specified upload-id does not match any initiated upload on this object |
+---------------+----------------+--------------------------------------------------------------------------+
List Multipart Upload Parts
---------------------------
Syntax
~~~~~~
::
GET /{bucket}/{object}?uploadId=123 HTTP/1.1
Response Entities
~~~~~~~~~~~~~~~~~
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| Name | Type | Description |
+=========================================+=============+==========================================================================================================+
| ``InitiatedMultipartUploadsResult`` | Container | A container for the results. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Bucket`` | String | The bucket that will receive the object contents. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Key`` | String | The key specified by the ``key`` request parameter (if any). |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``UploadId`` | String | The ID specified by the ``upload-id`` request parameter identifying the multipart upload (if any). |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Initiator`` | Container | Contains the ``ID`` and ``DisplayName`` of the user who initiated the upload. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``ID`` | String | The initiator's ID. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``DisplayName`` | String | The initiator's display name. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Owner`` | Container | A container for the ``ID`` and ``DisplayName`` of the user who owns the uploaded object. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``StorageClass`` | String | The method used to store the resulting object. ``STANDARD`` or ``REDUCED_REDUNDANCY`` |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``PartNumberMarker`` | String | The part marker to use in a subsequent request if ``IsTruncated`` is ``true``. Precedes the list. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``NextPartNumberMarker`` | String | The next part marker to use in a subsequent request if ``IsTruncated`` is ``true``. The end of the list. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``MaxParts`` | Integer | The max parts allowed in the response as specified by the ``max-parts`` request parameter. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``IsTruncated`` | Boolean | If ``true``, only a subset of the object's upload contents were returned. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Part`` | Container | A container for ``Key``, ``Part``, ``InitiatorOwner``, ``StorageClass``, and ``Initiated`` elements. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``PartNumber`` | Integer | The identification number of the part. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``ETag`` | String | The part's entity tag. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
| ``Size`` | Integer | The size of the uploaded part. |
+-----------------------------------------+-------------+----------------------------------------------------------------------------------------------------------+
Complete Multipart Upload
-------------------------
Assembles uploaded parts and creates a new object, thereby completing a multipart upload.
Syntax
~~~~~~
::
POST /{bucket}/{object}?uploadId= HTTP/1.1
Request Entities
~~~~~~~~~~~~~~~~
+----------------------------------+-------------+-----------------------------------------------------+----------+
| Name | Type | Description | Required |
+==================================+=============+=====================================================+==========+
| ``CompleteMultipartUpload`` | Container | A container consisting of one or more parts. | Yes |
+----------------------------------+-------------+-----------------------------------------------------+----------+
| ``Part`` | Container | A container for the ``PartNumber`` and ``ETag``. | Yes |
+----------------------------------+-------------+-----------------------------------------------------+----------+
| ``PartNumber`` | Integer | The identifier of the part. | Yes |
+----------------------------------+-------------+-----------------------------------------------------+----------+
| ``ETag`` | String | The part's entity tag. | Yes |
+----------------------------------+-------------+-----------------------------------------------------+----------+
Response Entities
~~~~~~~~~~~~~~~~~
+-------------------------------------+-------------+-------------------------------------------------------+
| Name | Type | Description |
+=====================================+=============+=======================================================+
| **CompleteMultipartUploadResult** | Container | A container for the response. |
+-------------------------------------+-------------+-------------------------------------------------------+
| **Location** | URI | The resource identifier (path) of the new object. |
+-------------------------------------+-------------+-------------------------------------------------------+
| **Bucket** | String | The name of the bucket that contains the new object. |
+-------------------------------------+-------------+-------------------------------------------------------+
| **Key** | String | The object's key. |
+-------------------------------------+-------------+-------------------------------------------------------+
| **ETag** | String | The entity tag of the new object. |
+-------------------------------------+-------------+-------------------------------------------------------+
Abort Multipart Upload
----------------------
Syntax
~~~~~~
::
DELETE /{bucket}/{object}?uploadId= HTTP/1.1
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