Get iTwin Image - iTwins | iTwin Platform

REST API Overview

Reference

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

Request parameters

iTwinId

Yes

iTwin ID associated with the retrieved image.

Request headers

Authorization

Yes

OAuth access token with itwin-platform scope

Yes

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

Response

Response 200 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 user has sent too many requests in a given amount of time.

json

{
    "error": {
        "code": "TooManyRequests",
        "message": "More requests were received than the subscription rate-limit allows."
    }
}

Response headers

retry-after

The number of requests exceeds the rate-limit for the client subscription.

Definitions

image-response

image

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.

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.

error

Error

Error information.