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下载API文件到Firebase云存储?

ibm-watson text-to-speech firebase-storage google-cloud-functions node.js

Thomas David Kehoe · 技术社区 · 7 年前

如何将IBM Watson文本到语音的音频文件(约10K)保存到Firebase云存储?这是我的代码,从IBM Watson复制过来的 documentation

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

var TextToSpeechV1 = require('watson-developer-cloud/text-to-speech/v1');
var fs = require('fs');    

exports.TextToSpeech = functions.firestore.document('Test_Value').onUpdate((change, context) => {

  var textToSpeech = new TextToSpeechV1({
    username: 'groucho',
    password: 'swordfish',
    url: 'https://stream.watsonplatform.net/text-to-speech/api'
  });

  var synthesizeParams = {
    text: 'Hello world',
    accept: 'audio/wav',
    voice: 'en-US_AllisonVoice'
  };

  textToSpeech.synthesize(synthesizeParams).on('error', function(error) {
    console.log(error);
  }).pipe(fs.createWriteStream('hello_world.wav')); // what goes here?

  const file = ?????
  file.download()
  .then(function(data) {
    console.log("File downloaded."
  })
  .catch(error => {
    console.error(error);
  });
});

缺少的代码介于

}).pipe(fs.createWriteStream('hello_world.wav'));

file.download()

我不得不将ibmwatson提供的文件转换成Firebase云存储可以识别的文件。是 fs 谷歌云功能中不允许?

var fs = require('fs-js');

var fs = require('fs');

根据 NPM 这个 fs公司 包已弃用。

pipe

}).pipe(file);
file.download()

2 回复 | 直到 7 年前

dpopp07 7 年前

file.download() ,我认为您可以使这项工作几乎没有改变您的代码。 file 需要类型 File 从Google存储库(您需要安装 this library createWriteStream 你可以把结果流出来 synthesize 到。我没有对此进行测试,但我相信它应该是正确的,或者至少应该为您指出正确的方向:

// looks like you'll need to require this package also
const { Storage } = require('@google-cloud/storage');

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

var TextToSpeechV1 = require('watson-developer-cloud/text-to-speech/v1');
var fs = require('fs');    

const storage = new Storage();
const myBucket = storage.bucket('my-bucket');

exports.TextToSpeech = functions.firestore.document('Test_Value').onUpdate((change, context) => {

  var textToSpeech = new TextToSpeechV1({
    username: 'groucho',
    password: 'swordfish',
    url: 'https://stream.watsonplatform.net/text-to-speech/api'
  });

  var synthesizeParams = {
    text: 'Hello world',
    accept: 'audio/wav',
    voice: 'en-US_AllisonVoice'
  };

  const file = myBucket.file('my-file'); // name your file something here

  textToSpeech
    .synthesize(synthesizeParams)
    .on('error', function(error) {
      console.log(error);
    })
    .pipe(file.createWriteStream()) // the File object has a `createWriteStream` method for writing streams to it
    .on('error', function(err) {
      console.log(err);
    })
    .on('finish', function() {
      // The file upload is complete.
      file.download()
        .then(function(data) {
          console.log("File downloaded.");
        })
        .catch(error => {
          console.error(error);
        });
    });
});

记录在案:

pipe() 应该允许在谷歌云功能和它是异步。这就是为什么你需要倾听 finish 下载文件前的事件
fs fs公司 Node's core built-in packages . 也就是说,看起来您可能根本不需要在代码中使用它

Thomas David Kehoe 7 年前

exports.TextToSpeech = functions.firestore.document('Test_Word').onUpdate((change, context) => {

if (change.after.data().word != undefined) {
    myWord = change.after.data().word;
    myWordFileType = myWord + '.ogg';

  var synthesizeParams = {
        text: myWord,
        accept: 'audio/ogg',
        voice: 'en-US_AllisonVoice'
      };

      const {Storage} = require('@google-cloud/storage');
      const storage = new Storage();
      const bucket = storage.bucket('myapp.appspot.com');
      const file = bucket.file('Test_Folder' + myWordFileType);

      var TextToSpeechV1 = require('watson-developer-cloud/text-to-speech/v1');

      var textToSpeech = new TextToSpeechV1({
        username: 'groucho',
        password: 'swordfish',
        url: 'https://stream.watsonplatform.net/text-to-speech/api'
      });

      textToSpeech.synthesize(synthesizeParams).on('error', function(error) {
        console.log(error);
      }).pipe(file.createWriteStream({contentType: 'auto'}))
      .on('error', function(err) {})
      .on('finish', function() {
        console.log("Complete.");
      });
      }
      return 0;
    });

当一个新词写入Firestore位置时,该函数触发,然后提取该词并调用它 myWord . 添加.ogg使 myWordFileType pipe file.createWriteStream contentType 必须设置为获取可读文件,但是 auto 这很简单。然后将文件写入bucket,该bucket被设置为我的Firebase云存储文件夹 Test_Folder 文件名是 myWordFileType .