Google Speech Recognition with API key + gRPC

testApiKeyAndGrpc.js

/**
* Make sure you're not already authenticated with gRPC, on MacOS you need
* to ensure the GOOGLE_APPLICATION_CREDENTIALS environment variable is not
* set : `unset GOOGLE_APPLICATION_CREDENTIALS`
*
* @google-cloud/speech and google-gax are used to load the necessary .proto files
*
* I tried to add the 'key' to the request itself, or as a metadata with the request
* and always getting the following error from gRPC :
*  Error: 7 PERMISSION_DENIED: The request is missing a valid API key.
*/
var PROTO_PATH = __dirname + '/node_modules/\@google-cloud/speech/protos/google/cloud/speech/v1/cloud_speech.proto';

const grpc = require('grpc');
const fs = require('fs');
const merge = require('lodash.merge');
const gax = require('google-gax');
const path = require('path');

const API_KEY = 'INSERT YOUR API KEY HERE';
const fileName = './audio.raw';

const metadata = new grpc.Metadata();
metadata.add('x-goog-api-key', API_KEY);

// Load the applicable protos.
var protos = merge(
  {},
  gax.grpc().loadProto(
    path.join(__dirname, 'node_modules', '\@google-cloud', 'speech', 'protos'),
    'google/cloud/speech/v1/cloud_speech.proto'
  )
);

// Reads a local audio file and converts it to base64
const file = fs.readFileSync(fileName);
const audioBytes = file.toString('base64');

// The audio file's encoding, sample rate in hertz, and BCP-47 language code
const audio = {
  content: audioBytes,
};
const config = {
  encoding: 'LINEAR16',
  sampleRateHertz: 16000,
  languageCode: 'en-US',
};
const request = {
  audio: audio,
  config: config,
  key: API_KEY
};

const client = new protos.google.cloud.speech.v1.Speech('speech.googleapis.com:443', grpc.credentials.createSsl());

client.Recognize(request,
  metadata,
  function(err, response) {
    if (err) {
      console.log("ERR :", err);
      return;
    }
  
    console.log("RESPONSE :", response);
  });

Did you found a solution?

No, I gave up trying to make this work with an API key and used a service account's JSON file instead to authenticate.

I managed to make it work. The metadata key is x-goog-api-key.

Thanks a lot for reporting back ! Substituting metadata.add('key', API_KEY); with metadata.add('x-goog-api-key', API_KEY); makes it work then, right ?

Yes

…

On Thu, 14 May 2020 at 12:12, Philippe Sultan ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Thanks a lot for reporting back ! Substituting metadata.add('key', API_KEY); with metadata.add('x-goog-api-key', API_KEY); makes it work then, right ? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <https://gist.github.com/3b38a508072d83e374cbbbcf13485f1c#gistcomment-3303690>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACG2OVW4UBEJPFVW4X3R55DRROYXNANCNFSM4NAJBMKQ> .

Updated, thanks again @long1eu !

😁

Not sure the diff to protos is still neeeded in fact :

-    option (google.api.http) = { post: "/v1/speech:recognize" body: "*" };
+    option (google.api.http) = { post: "/v1/speech:recognize" };

From your testing, do you think it is ?

It's not. That is only grpc to http transcoding.

…

On Thu, 14 May 2020 at 12:44, Philippe Sultan ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Not sure the diff to protos is still neeeded in fact : - option (google.api.http) = { post: "/v1/speech:recognize" body: "*" }; + option (google.api.http) = { post: "/v1/speech:recognize" }; From your testing, do you think it is ? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/3b38a508072d83e374cbbbcf13485f1c#gistcomment-3303725>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACG2OVUTT4IQPECSNBW2P5DRRO4RFANCNFSM4NAJBMKQ> .

👍

Hello, I tried this code and have the following error : ERROR gax.grpc is not a function

I'm using this npm packages for this :

• @google-cloud/speech
• google-gax
• lodash.merge
• grpc

Here is my code :

const gcsUri = 'gs://my-bucket/audio.raw'
const encoding = 'Encoding of the audio file, e.g. LINEAR16'
const sampleRateHertz = 16000
const languageCode = 'BCP-47 language code, e.g. en-US'

metadata.add('x-goog-api-key', 'HERE_IS_MY_API_KEY')
var PROTO_PATH = __dirname + '/node_modules/\@google-cloud/speech/build/protos/google/cloud/speech/v1/cloud_speech.proto'

var protos = merge(
  {},
  gax.grpc().loadProto(
    path.join(__dirname, 'node_modules', '\@google-cloud', 'build', 'speech', 'protos'),
    'google/cloud/speech/v1/cloud_speech.proto'
  )
)

const client = new protos.google.cloud.speech.v1.Speech('speech.googleapis.com:443', grpc.credentials.createSsl())

const config = {
  encoding: encoding,
  sampleRateHertz: sampleRateHertz,
  languageCode: languageCode
}

const audio = {
  uri: gcsUri
}

const request = {
  config: config,
  audio: audio
}

const [operation] = await client.longRunningRecognize(request)

const [response] = await operation.promise()

const transcription = response.results.map(result => result.alternatives[0].transcript).join('\n')

console.log(transcription)

As you see I'm just trying to make working the documentation example of speech-to-text without service account and with a simple API key instead.

You can also see I modified the path to the proto file, adding the build folder I have in my structure (original from npm package)

Thank you for your help !

Hi @Dizuite,

Have you installed the google-gax library (npm install google-gax), and added it to your code (const gax = require('google-gax');) ?

Hello @phsultan,

Thank you for your answer, yes I have it in my code and its initialized

const speech = require('@google-cloud/speech')
const grpc = require('grpc')
const metadata = new grpc.Metadata()
const merge = require('lodash.merge')
const gax = require('google-gax')

module.exports = {
  path: '/api',
  handler: app
}

Here is the google-gax line in my package.json dependencies

    "dependencies": {
        "google-gax": "^2.11.2",

Have a nice day !