I created a simple node api as follows

router.post('/extract-text', auth, async (req, res) => {
  try {
    const { gcsUri } = req.body;

    if (!gcsUri) {
      return res.status(400).json({ message: 'GCS URI is required' });
    }

    const request = {
      name: `projects/project_name/locations/us/processors/759ef192d97e542c`,
      rawDocument: {
        gcsUri: gcsUri,
        mimeType: 'application/pdf',
      },
    };

    const [response] = await client.processDocument(request);
    console.log(response.document.text);
    res.status(200).json(response.document.text);
  } catch (error) {
    console.error('Error extracting text from document:', error);
    res.status(500).json({ message: 'Failed to extract text from document' });
  }
});

I created a bucket in the same project and uploaded a pdf file in bucket after trying this api on postman I am getting the following error,

Error extracting text from document: Error: 3 INVALID_ARGUMENT: Request contains an invalid argument.
    at callErrorFromStatus (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/call.js:31:19)
    at Object.onReceiveStatus (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/client.js:193:76)
    at Object.onReceiveStatus (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:360:141)
    at Object.onReceiveStatus (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:323:181)
    at /Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/resolving-call.js:129:78
    at process.processTicksAndRejections (node:internal/process/task_queues:77:11)
for call at
    at ServiceClientImpl.makeUnaryRequest (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/client.js:161:32)
    at ServiceClientImpl.<anonymous> (/Users/anshul/mvp/server/node_modules/@grpc/grpc-js/build/src/make-client.js:105:19)
    at /Users/anshul/mvp/server/node_modules/@google-cloud/documentai/build/src/v1/document_processor_service_client.js:326:29
    at /Users/anshul/mvp/server/node_modules/google-gax/build/src/normalCalls/timeout.js:44:16
    at repeat (/Users/anshul/mvp/server/node_modules/google-gax/build/src/normalCalls/retries.js:80:25)
    at /Users/anshul/mvp/server/node_modules/google-gax/build/src/normalCalls/retries.js:119:13
    at OngoingCallPromise.call (/Users/anshul/mvp/server/node_modules/google-gax/build/src/call.js:67:27)
    at NormalApiCaller.call (/Users/anshul/mvp/server/node_modules/google-gax/build/src/normalCalls/normalApiCaller.js:34:19)
    at /Users/anshul/mvp/server/node_modules/google-gax/build/src/createApiCall.js:112:30
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  code: 3,
  details: 'Request contains an invalid argument.',
  metadata: Metadata {
    internalRepr: Map(5) {
      'endpoint-load-metrics-bin' => [Array],
      'grpc-server-stats-bin' => [Array],
      'pc-high-bwd-bin' => [Array],
      'google.rpc.badrequest-bin' => [Array],
      'grpc-status-details-bin' => [Array]
    },
    options: {}
  },
  note: 'Exception occurred in retry method that was not classified as transient',
  statusDetails: [ BadRequest { fieldViolations: [Array] } ]
}

I don’t understand this error as I am not passing arguments here.

I have gone through this link
and ran this command too
gcloud projects add-iam-policy-binding YOUR_PROJECT_ID –member “serviceAccount:NAME@YOUR_PROJECT_ID.iam.gserviceaccount.com” –role “roles/owner”
but same error persists.

Edit: It seems this should be gcsDocument not rawDocument in request. (Shouldn’t have trusted chatgpt).