Table of contents
iTwins
Download API definition:
GET https://dev-api.bentley.com/itwins/{iTwinId}/image

Gets the image metadata for the specified iTwin.

The metadata will contain the name of the image and a URL for downloading the image. The name of the image is unique and will only change if the image changes. It can be used as a long term cache key to determine if you have already downloaded the image. The URLs will be valid for a minimum of 1 hour.

This API is used to get a link to the small image and the original uploaded image. To make it easier to use the small image as a thumbnail, the small image link is also included as a property on every iTwin.

Authentication

Requires Authorization header with valid Bearer token for scope itwin-platform.

For more documentation on authorization and how to get access token visit OAUTH2 Authorization page.

Authorization

The calling user must be a member of the specified iTwin. Use the Access Control API to manage an iTwin's members.

Request parameters

Name
Required?
Description
iTwinId
Yes

iTwin ID associated with the retrieved image.

Request headers

Name
Required?
Description
Authorization
Yes

OAuth access token with itwin-platform scope

Accept
Yes

Setting to application/vnd.bentley.itwin-platform.v1+json is recommended.

Response 200 OK

OK

json
{
    "image": {
        "id": "b3bd3a79-c5b4-41f5-ba5f-6d8c338d788a",
        "smallImageName": "small_b3bd3a79-c5b4-41f5-ba5f-6d8c338d788a.jpeg",
        "smallImageUrl": "https://crdeveussa01.blob.core.windows.net/context-thumbnails/small_b3bd3a79-c5b4-41f5-ba5f-6d8c338d788a.jpeg?sv=2018-03-28&sr=b&sig=cuvNWKQE7hCsc4R12LPRSi%2BVOw0EhlB3pHxnrwHK4G8%3D&se=2023-06-28T00%3A00%3A00Z&sp=r",
        "largeImageName": "large_b3bd3a79-c5b4-41f5-ba5f-6d8c338d788a.jpeg",
        "largeImageUrl": "https://crdeveussa01.blob.core.windows.net/context-images/large_b3bd3a79-c5b4-41f5-ba5f-6d8c338d788a.jpeg?sv=2018-03-28&sr=b&sig=n%2BP%2BdGc1Uum4WHEm8Ji9ipZm6tM9d1r8b2iQS%2FjuOEM%3D&se=2023-06-28T00%3A00%3A00Z&sp=r"
    }
}

Response 401 Unauthorized

This response indicates that request lacks valid authentication credentials. Access token might not been provided, issued by the wrong issuer, does not have required scopes or request headers were malformed.

json
{
    "error": {
        "code": "HeaderNotFound",
        "message": "Header Authorization was not found in the request. Access denied."
    }
}

Response 404 Not Found

This response indicates that the specified iTwin was not found.

json
{
    "error": {
        "code": "ImageNotFound",
        "message": "Requested image is not available."
    }
}

Response 429 Too many requests

This response indicates that the client sent more requests than allowed by this API for the current tier of the client.

json
{
    "error": {
        "code": "RateLimitExceeded",
        "message": "The client sent more requests than allowed by this API for the current tier of the client."
    }
}

Response headers

Name
Description
retry-after

Number of seconds to wait until client is allowed to make more requests.

image-response

Name
Type
Description
image

image

Name
Type
Description
id
String

The unique id of the image.

smallImageName
String

The generated name of the small image. It is unique and will only change if the image changes. The small image is an automatically generated thumbnail of the uploaded image.

smallImageUrl
String

The URL of the small image. This URL is also returned as a property on each iTwin. This makes it easy to use as a thumbnail.

largeImageName
String

The generated name of the uploaded image. It is unique and will only change if the image changes.

largeImageUrl
String

The URL of the large image. Usually, only the small image is used but this URL will provide the orginal large image if needed.

Error

Contains error information.

Name
Type
Description
code
String

One of a server-defined set of error codes.

message
String

A human-readable representation of the error.

target
String, null

The target of the error.

Error Response

Gives details for an error that occurred while handling the request. Note that clients MUST NOT assume that every failed request will produce an object of this schema, or that all of the properties in the response will be non-null, as the error may have prevented this response from being constructed.

Name
Type
Description
error

Error information.

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