如何使用Node.js获取和设置数据到Firebase？

Question

我正在学习Firebase和Node.js. 我想从Twitter获取我的推文并将其发送到Firebase.从Twitter获取推文我没有问题.我的问题是如何将数据发送到Firebase？

我尝试了以下代码:

var firebase = require('firebase');

// Initialize
var app = firebase.initializeApp({
    ServiceAccount: {
       projectId: "******",
       clientEmail: "****@gmail.com",
       privateKey: "-----BEGIN PRIVATE KEY-----\nkey\n-----END PRIVATE KEY-----\n"
    },
   databaseURL: "****.firebaseio.com"
}); 

// Set Sample Data
firebase.database().ref('/').set({
    username: "test",
    email: "test@mail.com"
});

我在控制台上收到以下错误:

 Debugger listening on port 5858
 crypto.js:279
  var ret = this._handle.sign(toBuf(key), null, passphrase);
                         ^

Error: error:0906D064:PEM routines:PEM_read_bio:bad base64 decode
    at Error (native)
    at Sign.sign (crypto.js:279:26)
    at Object.sign (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\node_modules\jsonwebtoken\node_modules\jws\node_modules\jwa\index.js:54:45)
    at Object.jwsSign [as sign] (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\node_modules\jsonwebtoken\node_modules\jws\lib\sign-stream.js:23:24)
    at Object.JWT.sign (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\node_modules\jsonwebtoken\index.js:137:16)
    at authJwt (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\auth-node\auth.js:83:16)
    at fetchAccessToken (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\auth-node\auth.js:96:17)
    at app_.INTERNAL.getToken (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\auth-node\auth.js:196:14)
    at Zb.getToken (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\database-node.js:28:3496)
    at yh (C:\Users\admin\Desktop\myProject\myProject\node_modules\firebase\database-node.js:195:334)
 Press any key to continue...

另外,这是我的firebase规则:{"rules":{".read":true,".write":true}}

Answer 1

我解决了我的问题.我刚从Firebase Console下载了serviceAccount json文件并将其插入到我的项目中."服务帐户"文件包含您需要的所有内容.

var firebase = require('firebase');

firebase.initializeApp({
    databaseURL: 'https://*****.firebaseio.com',
    credential: 'myapp-13ad200fc320.json', //this is file that I downloaded from Firebase Console
});

然后下面的代码很好地工作.

firebase.database().ref('/').set({
    username: "test",
    email: "test@mail.com"
});

Answer 2

node不推荐使用针对应用中服务帐户的特定语法/库.在服务器(即,不是消费者应用程序,如物联网或桌面)上到达firebase的新方法就是firebase admin sdk.

您的初始化代码现在应该:

var admin = require("firebase-admin");

var serviceAccount = require("path/to/serviceAccountKey.json");

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
});

您仍然可以手动键入凭据,但现在它们已分配给diff't属性:

admin.initializeApp({
  credential: admin.credential.cert({
    projectId: "<PROJECT_ID>",
    clientEmail: "foo@<PROJECT_ID>.iam.gserviceaccount.com",
    privateKey: "-----BEGIN PRIVATE KEY-----\n<KEY>\n-----END PRIVATE KEY-----\n"
  }),
  databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
});

Answer 3

我们在AWS Beanstalk上遇到了同样的问题.根本原因是因为私钥变量\n被替换了\\n.

添加替换正则​​表达式后,它被修复:

"private_key": process.env.FIREBASE_PRIVATE_KEY.replace(/\\n/g, '\n')

将变量打印到日志中也有助于隔离问题.