Cloud Vision: Credentials issues - firebase

Question

I am attempting to setup Cloud Vision on my local machine in a Firebase project but I am encountering problems with the default credentials.
First, I encountered Could not load the default credentials. This post suggested that I do gcloud auth application-default login. Upon attempting that, I encountered this:
Error: 7 PERMISSION_DENIED: Your application has authenticated using end user credentials from the Google Cloud SDK or Google Cloud Shell which are not supported by the vision.googleapis.com. We recommend configuring the billing/quota_project setting in gcloud or using a service account through the auth/impersonate_service_account setting. For more information about service accounts and how to use them in your application, see https://cloud.google.com/docs/authentication/.
I also attempted exports GOOGLE_APPLICATION_CREDENTIALS = "pathToServiceAccount" but it didn't work in my case.
Note that I have no issue reading/writing data to Firestore and Firebase Storage. The moment my code hits the Cloud Vision part, it throws the error. I have activated the API on cloud console and enabled billing. Security rules in firestore and storage are in testing mode at this moment.
const vision = require('#google-cloud/vision');
var admin = require('firebase-admin');
let serviceAccount = require('../path-to-service-account.json');
admin.initializeApp({
credential: admin.credential.cert(serviceAccount),
storageBucket: "mybucket.appspot.com"
});
let db = admin.firestore()
let bucket = admin.storage().bucket();
//Some networking code, return a promise
.then(response => {
//setup storagePath
return pipeToStorage(item, response, storagePath) //Save to firebase storage ok
})
.then((item) => {
return performTextDetection(item.id) //Throws error here
})
function pipeToStorage(item, response, storagePath) {
return new Promise((resolve, reject) => {
gcFile = bucket.file(storagePath)
response.data
.pipe(gcFile.createWriteStream({
metadata : {
contentType: "application/pdf"
}
}))
.on('error', (error) => {
reject(error)
})
.on('finish', () => {
resolve(item)
})
})
}
function performTextDetection(id) {
const client = new vision.ImageAnnotatorClient();
const bucketName = bucket.name;
const fileName = `items/${id}.pdf`
const outputPrefix = 'ocr_results'
const gcsSourceUri = `gs://${bucketName}/${fileName}`;
const gcsDestinationUri = `gs://${bucketName}/${outputPrefix}/${id}/`;
const inputConfig = {
mimeType: 'application/pdf',
gcsSource: {
uri: gcsSourceUri,
},
};
const outputConfig = {
gcsDestination: {
uri: gcsDestinationUri,
},
};
const features = [{type: 'DOCUMENT_TEXT_DETECTION'}];
const request = {
requests: [
{
inputConfig: inputConfig,
features: features,
outputConfig: outputConfig,
},
],
};
return client.asyncBatchAnnotateFiles(request)
.then(([operation]) => {
return operation.promise()
})
.then(([filesResponse]) => {
const resultsUri = filesResponse.responses[0].outputConfig.gcsDestination.uri
return resultsUri
})
}

Answer 1

This happens because you have exports rather than export:
exports GOOGLE_APPLICATION_CREDENTIALS = "pathToServiceAccount"
please try:
export GOOGLE_APPLICATION_CREDENTIALS="/home/user/credentials.json"
note that there are not spaces, see details here. By the way, I have also found the same PERMISSION_DENIED error when export is omitted.
The validation step is executing a REST request with curl:
curl -X POST \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
-H "Content-Type: application/json; charset=utf-8" \
-d #request.json \
https://vision.googleapis.com/v1/images:annotate
See the complete example here.