# Share Objects with Pre-Signed URLs

By default, objects in the <code class="expression">space.vars.ionos\_cloud\_object\_storage</code> are private and only the bucket owner has permission to access them. Only the bucket owner can generate a pre-signed URL for objects and grant time-bound permission to other users to access these objects. It is a secure and user-friendly way to share private objects stored in your Object Storage with other users.

{% hint style="info" %}
**Note:** For a contract-owned bucket, in addition to the bucket owner, the administrator has permission to generate a pre-signed URL for objects and grant time-bound permission to other users to access these objects.
{% endhint %}

This way, the objects are made publically available for users with the object's pre-signed URL; however, you could limit the period of access to the object.

## Use cases

* Pre-signed URLs are ideal for providing temporary access to a specific object without needing to change the object's permissions or share your credentials with other users.
* Allows other users to upload objects directly to your Object Storage bucket without needing to provide them with access and secret keys.

## DCD

1\. In the **DCD**, go to **Menu** > **Storage & Backup** > **IONOS Object Storage**.

2\. From the drop-down list in the **Buckets** tab, choose either to **Show user-owned buckets** or **Show contract-owned buckets** depending on the bucket type you want to view.

3\. From the **Buckets** list, choose the bucket from which you want to share the objects. The list of objects in the bucket is listed.

4\. Select the object to share and click **Generate Pre-Signed URL**.

![Select generate pre-signed URL](https://1737632334-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MifAzdGvKLDTtvJP8sm%2Fuploads%2Fgit-blob-324c8d75ebc128817ff0e011abc98acba179d0a0%2Fobject-storage-generate-pre-signed-url.png?alt=media)

5\. Enter the expiration time for the URL and choose whether the specified time refers to seconds, minutes, hours, or days.

6\. Click **Generate**.

![Generate pre-signed URL](https://1737632334-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MifAzdGvKLDTtvJP8sm%2Fuploads%2Fgit-blob-12152c9d03bc3b9feaaf89372558440dd7dc1cf7%2Fs3-pre-signed-url.png?alt=media)

7\. Copy the generated pre-signed URL and share it with users who require access to this object.

{% hint style="success" %}
**Result:** The pre-signed URL for the selected object is generated successfully and copied to the clipboard. The URL is valid for the period defined during URL generation.
{% endhint %}

## CLI

{% hint style="info" %}
**Prerequisites:**

* Set up the AWS CLI by following the [<mark style="color:blue;">installation instructions</mark>](https://docs.ionos.com/cloud/backup-and-storage/ionos-object-storage/s3-tools/awscli).
* Make sure to consider the supported [<mark style="color:blue;">Endpoints</mark>](https://docs.ionos.com/cloud/backup-and-storage/ionos-object-storage/endpoints).
  {% endhint %}

Generate a pre-signed URL for `my-object.txt` in the `my-bucket` bucket which will expire in 3600 seconds:

```
aws s3 presign s3://MY-BUCKET/my-object.txt --expires-in 3600 --endpoint-url https://s3-eu-central-2.ionoscloud.com
```

## API and SDKs

The creation of pre-signed URLs does not involve a dedicated API by design. These URLs are generated locally via a signing algorithm using your credentials without relying on the S3 API. To create these URLs, use the appropriate SDK for your programming language.

<code class="expression">space.vars.ionos\_cloud\_object\_storage</code> is S3-compatible, allowing seamless integration with any SDK supporting the S3 protocol for tasks like generating pre-signed URLs. For generating pre-signed URLs using SDKs, see the following AWS methods: [<mark style="color:blue;">Python</mark>](https://boto3.amazonaws.com/v1/documentation/api/latest/guide/s3-presigned-urls.html), [<mark style="color:blue;">Go</mark>](https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/s3-example-presigned-urls.html), [<mark style="color:blue;">Java 2.x.</mark>](https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/examples-s3-presign.html), [<mark style="color:blue;">JavaScript 2.x.</mark>](https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/examples-s3-presign.html), [<mark style="color:blue;">JavaScript v3</mark>](https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/s3-presigned-url.html), and [<mark style="color:blue;">PHP Version 3</mark>](https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/s3-presigned-url.html).


---

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