Cloud Vision API send response "com.google.firebase.functions.FirebaseFunctionsException: No image "

[Sadaf]

Hi,

I am newbie in Cloud Vision Api and using it for my android app development to translate urdu text from image but everytime I hit my firebase function i get exception as "com.google.firebase.functions.FirebaseFunctionsException: No image present."  However I've decoded my base64 encoded image and found correct image.

I am going crazy finding solution of what went wrong as i followed firebase documentation.

https://firebase.google.com/docs/ml/android/recognize-text?_gl=1*15xzslq*_up*MQ..*_ga*NDc3MTU1MjQ0Lj...

Anyone can please provide a solution of it.

Here is my firebase cloud function code in index.js:

const functions = require("firebase-functions");

const vision = require("@google-cloud/vision");

const client = new vision.ImageAnnotatorClient();

exports.annotateImage = functions.https.onCall(async (data, context) => {

if (!context.auth) {

throw new functions.https.HttpsError(

"unauthenticated",

"annotateImage must be called while authenticated."

);

}

console.log("data "+data)

logger.log("dataRequest"+data)

try {

logger.log("parseDataRequest"+JSON.parse(data))

return await client.annotateImage(JSON.parse(data)); // I've tried removing JSON.parse but same exception occurred.

} catch (e) {

throw new functions.https.HttpsError("internal", e.message, e.details);

}

});

And my android end request format : 

{
"image": {
"content": "/9j/4AAQ........(base64image)=="
},
"features": [
{
"type": "TEXT_DETECTION"
}
],
"imageContext": {
"languageHints": [
"ur"
]
}
}

Thank you in advance for providing the solution. Have a great day!!!.