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Merge pull request #110 from GoogleCloudPlatform/speech
Add Cloud Speech sample.
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| ## Cloud Speech API samples | ||
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| These samples require two environment variables to be set: | ||
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| - `GOOGLE_APPLICATION_CREDENTIALS` - Path to a service account file. You can | ||
| download one from your Google project's "credentials" page. | ||
| - `GCLOUD_PROJECT` - ID of your Google project. | ||
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| See [gcloud-node authentication][auth] for more details. | ||
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| [auth]: https://googlecloudplatform.github.io/gcloud-node/#/docs/guides/authentication | ||
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| ## Run a sample | ||
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| Install dependencies first: | ||
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| npm install | ||
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| ### Recognition sample | ||
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| Execute the sample: | ||
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| node recognize "/path/to/audio.file" |
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| { | ||
| "name": "nodejs-docs-samples-speech", | ||
| "description": "Node.js samples for Google Cloud Speech API.", | ||
| "version": "0.0.1", | ||
| "private": true, | ||
| "license": "Apache Version 2.0", | ||
| "author": "Google Inc.", | ||
| "engines": { | ||
| "node": ">=0.10.x" | ||
| }, | ||
| "scripts": { | ||
| "recognize": "node recognize" | ||
| }, | ||
| "dependencies": { | ||
| "googleapis": "^6.1.0" | ||
| }, | ||
| "devDependencies": { | ||
| "async": "^1.5.0" | ||
| } | ||
| } |
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| // Copyright 2016, Google, Inc. | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| 'use strict'; | ||
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| // [START app] | ||
| // [START import_libraries] | ||
| var google = require('googleapis'); | ||
| var async = require('async'); | ||
| var fs = require('fs'); | ||
| // [END import_libraries] | ||
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| // Url to discovery doc file | ||
| // [START discovery_doc] | ||
| var url = 'https://speech.googleapis.com/$discovery/rest'; | ||
| // [END discovery_doc] | ||
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| // [START authenticating] | ||
| function getSpeechService(callback) { | ||
| // Acquire credentials | ||
| google.auth.getApplicationDefault(function (err, authClient) { | ||
| if (err) { | ||
| return callback(err); | ||
| } | ||
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| // The createScopedRequired method returns true when running on GAE or a | ||
| // local developer machine. In that case, the desired scopes must be passed | ||
| // in manually. When the code is running in GCE or a Managed VM, the scopes | ||
| // are pulled from the GCE metadata server. | ||
| // See https://cloud.google.com/compute/docs/authentication for more | ||
| // information. | ||
| if (authClient.createScopedRequired && authClient.createScopedRequired()) { | ||
| // Scopes can be specified either as an array or as a single, | ||
| // space-delimited string. | ||
| authClient = authClient.createScoped([ | ||
| 'https://www.googleapis.com/auth/cloud-platform' | ||
| ]); | ||
| } | ||
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| // Load the speach service using acquired credentials | ||
| console.log('Loading speech service...'); | ||
| google.discoverAPI({ | ||
| url: url, | ||
| version: 'v1', | ||
| auth: authClient | ||
| }, function (err, speechService) { | ||
| if (err) { | ||
| return callback(err); | ||
| } | ||
| callback(null, speechService, authClient); | ||
| }); | ||
| }); | ||
| } | ||
| // [END authenticating] | ||
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| // [START construct_request] | ||
| function prepareRequest(inputFile, callback) { | ||
| fs.readFile(inputFile, function (err, audioFile) { | ||
| if (err) { | ||
| return callback(err); | ||
| } | ||
| console.log('Got audio file!'); | ||
| var encoded = new Buffer(audioFile).toString('base64'); | ||
| var payload = { | ||
| initialRequest: { | ||
| encoding: 'LINEAR16', | ||
| sampleRate: 16000 | ||
| }, | ||
| audioRequest: { | ||
| content: encoded | ||
| } | ||
| }; | ||
| return callback(null, payload); | ||
| }); | ||
| } | ||
| // [END construct_request] | ||
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| function main(inputFile, callback) { | ||
| var requestPayload; | ||
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| async.waterfall([ | ||
| function (cb) { | ||
| prepareRequest(inputFile, cb); | ||
| }, | ||
| function (payload, cb) { | ||
| requestPayload = payload; | ||
| getSpeechService(cb); | ||
| }, | ||
| // [START send_request] | ||
| function sendRequest(speechService, authClient, cb) { | ||
| console.log('Analyzing speech...'); | ||
| speechService.speech.recognize({ | ||
| auth: authClient, | ||
| resource: requestPayload | ||
| }, function (err, result) { | ||
| if (err) { | ||
| return cb(err); | ||
| } | ||
| console.log('result:', JSON.stringify(result, null, 2)); | ||
| cb(null, result); | ||
| }); | ||
| } | ||
| // [END send_request] | ||
| ], callback); | ||
| } | ||
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| // [START run_application] | ||
| if (module === require.main) { | ||
| if (process.argv.length < 3) { | ||
| console.log('Usage: node recognize <inputFile>'); | ||
| process.exit(); | ||
| } | ||
| var inputFile = process.argv[2]; | ||
| main(inputFile, console.log); | ||
| } | ||
| // [END run_application] | ||
| // [END app] | ||
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| exports.main = main; |
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| // Copyright 2016, Google, Inc. | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| 'use strict'; | ||
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| var test = require('ava'); | ||
| var path = require('path'); | ||
| var recognizeExample = require('../../speech/recognize'); | ||
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| test.cb('should list entries', function (t) { | ||
| recognizeExample.main( | ||
| path.resolve('../../speech/resources/audio.raw'), | ||
| function (err, result) { | ||
| t.ifError(err); | ||
| t.ok(result); | ||
| t.ok(result.responses); | ||
| t.is(result.responses.length, 1); | ||
| t.ok(result.responses[0].results); | ||
| t.end(); | ||
| } | ||
| ); | ||
| }); |
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| out.* | ||
| out.png | ||
| out.* |