Riak CS Initiate Multipart Upload

Initiates a multipart upload and returns an upload ID. The upload ID is used to associate all the parts in the specific multipart upload.


Request Syntax

This example shows the syntax for initiating a multipart upload.

POST /ObjectName?uploads HTTP/1.1
Host: bucketname.data.riak.com
Date: date
Authorization: signatureValue

Request Headers

Content-Type - A standard MIME type that describes the content format.

  • Type: String
  • Default: binary/octet-stream
  • Valid Values: 100-continue
  • Constraints: None

x-amz-meta-* - User specified metadata fields which can be stored with the object.

  • Type: String
  • Default: None
  • Constraints: None

Permission Request Headers

x-amz-acl - This request header specifies a predefined ACL to apply to the object being created. A predefined ACL grants specific permissions to individual accounts or predefined groups.

  • Type: String
  • Valid Values: private | public-read | public-read-write | authenticated-read | bucket-owner-read | bucket-owner-full-control
  • Constraints: None

Request Elements

This operation does not use request elements.


Response Headers

This implementation of the operation uses only response headers that are common to most responses. For more information, see Common RiakCS Response Headers.

Response Elements

InitiateMultipartUploadResult - Container for response.

  • Type: Container
  • Children: Bucket, Key, UploadId
  • Ancestors: None

Bucket - Name of the bucket to which the multipart upload was initiated.

  • Type: String
  • Children: Bucket, Key, UploadId
  • Ancestors: InitiateMultipartUploadResult

Key - Object key for which the multipart upload was initiated.

  • Type: String
  • Ancestors: InitiateMultipartUploadResult

UploadId - ID for the initiated multipart upload.

  • Type: String
  • Ancestors: InitiateMultipartUploadResult


Sample Request

This operation initiates a multipart upload for the large.iso object.

POST /large.iso?uploads HTTP/1.1
Host: os.data.riak.com
Date: Mon, 1 Nov 2010 20:34:56 GMT
Authorization: AWS AKIAIOSFODNN7EXAMPLE:0RQf4/cRonhpaBX5sCYVf1bNRuU=

Sample Response

HTTP/1.1 200 OK
Date:  Mon, 1 Nov 2010 20:34:56 GMT
Content-Length: 197
Connection: keep-alive
Server: MochiWeb/1.1 WebMachine/1.9.0 (someone had painted it blue)

<?xml version="1.0" encoding="UTF-8"?>
<InitiateMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">