Base64 encoded string with Form recognizer

Question

Base64 encoded string with Form recognizer

Adam Schlichtmann 1

I am trying to use the Form Recognizer rest api. In the docs there is the following:

Screenshot taken from: https://westus.dev.cognitive.microsoft.com/docs/services/form-recognizer-api-2022-08-31/operations/AnalyzeDocument

What is the base64Source property for?

To me it seems that I should be able to post a json request body such as: { base64Source: '...' } with the Content-Type header set to application/json.

This does not work and I cannot find a mention of this base64Source property anywhere else.

Does this property do anything?
Is there a way I can post a base64 string?

Thanks in advance!

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Answer 1

romungi-MSFT 48,906 Microsoft Employee Moderator

@Adam Schlichtmann Yes, you can post the base64Source content in the request body and get a 202 accepted response. For example,

Here is my request:

Corresponding response:

The results of the GET operation result:

This is inline with the examples provided on the form recognizer REST API spec repo available here.

What is the error seen in your case that fails the request?

If an answer is helpful, please click on or upvote which might help other community members reading this thread.

romungi-MSFT 48,906 Reputation points Microsoft Employee Moderator

2022-09-02T10:04:19.533+00:00

I have used an online tool to generate a base64 code for my form.
Ref: https://codebeautify.org/image-to-base64-converter
Adam Schlichtmann 1 Reputation point

2022-09-02T13:45:03.62+00:00

@romungi-MSFT

Thank you for the response!

I am doing exactly what you show in your screen shots. The only difference is that I am using the prebuilt business card model. Could that be the issue?

Here is the URL I am using: https://[REDACTED].cognitiveservices.azure.com/formrecognizer/v2.1/prebuilt/businessCard/analyze

The response I am getting is: 400 InvalidImageURL - Image URL is badly formatted.

For more context I am trying to do this within a React Native App.

Thank you for your time!
romungi-MSFT 48,906 Reputation points Microsoft Employee Moderator

2022-09-05T13:43:19.303+00:00

I have tried with business card and the request was successful.

GET result operation.

I see your request is using v2.1 version of the API instead of the latest. I believe the previous versions do not support this mode. Thanks!!

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Base64 encoded string with Form recognizer

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