Retrieving the ACL for an object

Content Platform Tenant Management Help

Version
9.7.x
File Size
4269 KB
Audience
anonymous
Part Number
MK-95HCPH002-19

You use the HTTP GET method with the acl query parameter to retrieve the ACL for an object. To retrieve the ACL for an object, you need read ACL permission for the bucket containing the object or for the object itself.

The object ACL is returned in an XML response body. The format of the response body is the same as the format you use for the ACL request body when you add an ACL to a bucket.

Request line

Depending on whether the bucket name is included in the hostname in the S3 compatible request, a request to retrieve an object ACL has either of these formats:

  • With the bucket name included in the hostname:
    GET /object-name?acl HTTP/1.1
  • With the bucket name following the hostname:
    GET /bucket-name/object-name?acl HTTP/1.1

The acl query parameter is not case sensitive.

Required headers

The list below describes the headers you can use in a request to add an ACL to an object.

Authorization
Specifies user credentials or requests anonymous access.
Date
Specifies the date and time when the request is being made according to the requester. Normally, this is the current date and time.
The date and time must always be specified using Greenwich Mean Time (GMT).
To specify the date and time, use this format:
DDD, dd MMM yyyy HH:mm:ss (+0000|GMT)
In this format:
DDD
The three-letter abbreviation for the day of the week, with an uppercase first letter (for example, Mon).
dd
The two-digit day of the month.
MMM
The three-letter abbreviation for the month, with an uppercase first letter (for example, Feb).
yyyy
The four-digit year.
HH
The hour on a 24-hour clock.
mm
The number of minutes.
ss
The number of seconds.
For example:
Thu, 23 Mar 2017 14:27:05 +0000
All S3 compatible requests must include either a Date header or an x-amz-date header. If a request includes both headers, HCP uses the date and time in the x-amz-date header.
Host
Specifies the hostname for the request. The host name identifies either a tenant or a bucket.
For a tenant, use this format:
tenant-name.hcp-domain-name
For a bucket, use this format:
bucket-name.tenant-name.hcp-domain-name
x-amz-date
Specifies the date and time at which the request is being made according to the requester. Normally, this is the current date and time.
For the valid values for this header, see the description of the Date header above.

Optional headers

x-hcp-pretty-print
Optionally, requests that the XML response body be formatted for readability. Valid values are:
true
Format the XML response body for readability.
false
Do not apply any special formatting to the XML response body.
The default is false.
The values true and false are not case sensitive.

Response headers

The list below describes the headers returned in response to a successful request to retrieve an object ACL.

Content-Type
Specifies the Internet media type of the response body. For a request to retrieve an object ACL, the value of this header is always application/xml;charset=UTF-8.
Date
The date and time when HCP responded to the request, in Greenwich Mean Time (GMT). The date and time are returned in this format:
DDD dd MMM yyyy HH:mm:ss GMT
For example:
Fri, 18 Sep 2020 14:27:05 GMT
Transfer-Encoding
Indicates that HCP could not determine the size of the response body before formulating the response. For a request to list the buckets you own, the value of this header is always chunked.

Status codes

The table below describes HTTP status codes that can be returned in response to a request to retrieve an object ACL.

Code Meaning Description
200 OK HCP successfully retrieved the object ACL.
403 Forbidden

Possible reasons include:

  • The credentials provided with the request are invalid.
  • You do not have permission to read the object ACL.
  • The specified bucket does not currently support the requested operation.
  • The S3 compatible API is currently disabled for the specified bucket.
404 Not Found

One of these:

  • The specified object does not exist.
  • The specified bucket does not exist.
500 Internal Server Error

An internal error occurred.

If this error persists, contact your tenant administrator.

503 Service Unavailable

HCP is temporarily unable to handle the request, probably due to system overload, maintenance, or upgrade. Try the request again, gradually increasing the delay between each successive attempt.

If this error persists, contact your tenant administrator.

Example: Retrieving an object ACL

Here’s a sample GET request that retrieves the ACL for the object named mktg/budget_proposals/BudgProp-2020.

Request with s3curl command line

./s3curl.pl --id=lgreen -- -k
     "https://finance.europe.hcp.example.com/mktg/budget_proposals/
             BudgProp-2020?acl" -H "x-hcp-pretty-print: true"

Request headers

GET /mktg/budget_proposals/BudgProp-2020?acl HTTP/1.1
Host: finance.europe.hcp.example.com
Date: Fri, 07 February 2020 17:19:26 +0000
Authorization: AWS bGdyZWVu:3pB7HQ8LNIHaFzHToefVgDD9hVo=
x-hcp-pretty-print: true

Response headers

HTTP/1.1 200 OK
Date: Fri, 07 February 2020 17:19:26 GMT
Content-Type: application/xml;charset=UTF-8
Transfer-Encoding: chunked

Response body

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<AccessControlPolicy xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
     <Owner>
          <ID>b9d39144-a081-4762-b0e8-b8fb51e10192</ID>
          <DisplayName>lgreen</DisplayName>
     </Owner>
     <AccessControlList>
          <Grant>
               <Grantee xsi:type="CanonicalUser"
                       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
                    <ID>b9d39144-a081-4762-b0e8-b8fb51e10192</ID>
                    <DisplayName>lgreen</DisplayName>
               </Grantee>
               <Permission>FULL_CONTROL</Permission>
          </Grant>
          <Grant>
               <Grantee xsi:type="Group"
                       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
                    <URI>http://acs.amazonaws.com/groups/global/AuthenticatedUsers</URI>
                    </Grantee>
               <Permission>READ</Permission>
          </Grant>
          <Grant>
               <Grantee xsi:type="CanonicalUser"
                       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
                    <ID>b9d39144-a081-4761-b0e8-b8fb51e10192</ID>
                    <DisplayName>pblack</DisplayName>
               </Grantee>
               <Permission>FULL_CONTROL</Permission>
          </Grant>
     </AccessControlList>
</AccessControlPolicy>