Image with Blob

[yukonn]

Hi,

       I got this message when i link image with blob value. "the property expects image values, but this rule produces incompatible Blob Values". How do i convert blob to image compatible value at PowerApps?

Regards,

Yukon

[Mike8]

Hello,

Kind of the same issue here. Could someone help, please?

Thank you

[jpersohn76]

Also having this issue.. has anyone found a solution?

[cherie]

Hi,

Can you please provide an example of what you are trying to do?

Thanks!

Cherie

[shahar]

I have the same issue.  In my case, I built a custom connector to Microsoft Graph API.  One of the path calls /photo/$value - which returns a binary value.  (I'm aware of the existing Office 365 connector, but that connector GetPhoto() function doesn't work in my configuration.)

[joem]

If you are using a custom API/connector, you've provided a Swagger/OpenAPI file.

When you specify the response for an operation to be binary, you specify like this:

"responses": {

  "200": {

    "description": "Success",

    "schema": {

      "type": "file",

      "x-ms-media-kind": "image"

    }

  }

}

The default for the x-ms-media-kind is "blob". But it can also be set to "image" or "media". This is the same extension that is supported when specifying a file upload that should be an "image" vs any sort of file.

[shahar]

Hi,

thanks for your help on this.

First, let me comment that in my world of PowerApps I can only use Swagger 2.0 syntax as in

"responses": {

  "200": {

    "description": "Success",

    "schema": {

      "type": "string",

      "format": "file",

      "x-ms-media-kind": "image"

    }

  }

But, this does not work.  the returned content type is not a file.  It is text/plain, but really it is binary data.  With a different format, such as the "file" or "image" the Power App replies with an error message: "The Response Type returned is invalid.  Expected JSON," which probably indicates an attempt by the system to read binary data into a string.

}

[joem]

Have you tried using the response schema I gave? It is valid Swagger for describing when a response body should be treated as a file, not as json data.

With the schema: { type: "string" ... }, this means the body is expected to be a json string. But your body is actually some arbitrary file.

[shahar]

I did. It is not a valid swagger 2.0 syntax. The type=file is rejected upon clicing Update Connector.

[joem]

Hrm, so I created a mock Swagger file that will download files of different media-kind's. The Swagger has three operations:

1. downloadFile
2. downloadImage
3. downloadAudio

When I try to bind the output of these operations to an Image control's 'Image' property I get the same error "The property expects Image values, but this rule produces incompatible Blob values." (or "...Media values." for the downloadAudio operation).

When I use downloadImage() function I do not get the error.

Here's the swagger I used:

{

"swagger": "2.0",

  "info": {

    "title": "downloadMediaKindExamples",

    "description": "mock example API to show how to write download operations using x-ms-media-kind.",

    "version": "1.0"

  },

  "host": "www.tempuri.org",

  "basePath": "/mock/api",

  "schemes": [

    "https"

  ],

  "parameters": {

    "entityId": {

      "name": "entityId",

      "in": "path",

      "required": true,

      "type": "integer"

    }

  },

  "paths": {

    "/files/{entityId}/binary/$value": {

      "get": {

        "operationId": "downloadFile",

        "parameters": [

          {

            "$ref": "#/parameters/entityId"

          }

        ],

        "responses": {

          "200": {

            "description": "Success",

            "schema": {

              "type": "file"

            }

          }

        }

      }

    },

    "/photos/{entityId}/binary/$value": {

      "get": {

        "operationId": "downloadPhoto",

        "parameters": [

          {

            "$ref": "#/parameters/entityId"

          }

        ],

        "responses": {

          "200": {

            "description": "Success",

            "schema": {

              "type": "file",

              "x-ms-media-kind": "image"

            }

          }

        }

      }

    },

    "/audio/{entityId}/binary/$value": {

      "get": {

        "operationId": "downloadAudio",

        "parameters": [

          {

            "$ref": "#/parameters/entityId"

          }

        ],

        "responses": {

          "200": {

            "description": "Success",

            "schema": {

              "type": "file",

              "x-ms-media-kind": "audio"

            }

          }

        }

      }

    }

  },

  "definitions": {}

}