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NodeJs代码在尝试发送云通知时显示错误

firebase-cloud-messaging firebase node.js

Simon74 · 技术社区 · 8 年前

我是nodeJs的初学者,但正在尝试连接到云服务器,通过firebase云通知发送通知

   // The Cloud Functions for Firebase SDK to create Cloud Functions and setup triggers.
const functions = require('firebase-functions');

// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.helloWorld = functions.https.onRequest((request, response) => {
 response.send("Hello from the ProjectSupporter Team");
});

exports.sendPushNotifications = functions.https.onRequest((req, res) => {
    res.send("Attempting to send push notification...")
    console.log("LOGGER --- Trying to send push message...")

    // admin.message().sendToDevice()

    var uid = 'Ky6h0BgpGDNMUyyBgE4ul99MzXk1'

    return admin.database().ref('/users/' + uid).once('value', async snapshot => {
        var user = snapshot.val();
        console.log("User username: " + user.username + " fcmToken: " + user.fcmToken);

        // See documentation on defining a message payload.
        var message = {
            notification: {
                title: "Push Notification Title",
                body: "Message Body..."
            },
          data: {
            score: '850',
            time: '2:45'
          },
          token: user.fcmToken
        };

        // Send a message to the device corresponding to the provided
        // registration token.
       try {
       const response = await admin.messaging().send(message);
       console.log('Successfully sent message:', response);
   } catch(e) {
       console.log('Error sending message:', error);
   }
});

这是我收到的错误消息:

20: 70错误分析错误:意外的令牌快照

1个问题(1个错误,0个警告)

npm错误!代码ELIFECYCLE

npm错误!错误1

npm错误!功能@lint: eslint .

npm错误!退出状态1

npm错误!

npm错误!在函数@lint脚本中失败。

npm错误!这可能不是npm的问题。上面可能还有其他日志输出。

我的ide括号显示第20、70行有错误。我想不出是什么问题。

这是一张图片: https://ibb.co/iBp17H

提前感谢!

1 回复 | 直到 8 年前

Marcos Casagrande 8 年前

您得到的错误是 eslint 错误,如果您运行代码,它将正常工作,因为它是有效的javascript。

林特法则 promise/always-return 就是要求你始终回到承诺链中,即使在最后 .then .所以只要归还一些东西或使用 async/await 。

return admin.database().ref('/users/' + uid).once('value', snapshot => {
    /*...*/
    // Send a message to the device corresponding to the provided
    // registration token.
    return admin.messaging().send(message)
        .then((response) => {
             //  promise/always-return
             console.log('Successfully sent message:', response);
             // Do something with response
             return true; // To quiet linter.
        })
        .catch((error) => {
            console.log('Error sending message:', error);
        });
});

使用 异步/等待 (您需要先传输代码)

Cloud Functions for Firebase Async Await style

return admin.database().ref('/users/' + uid).once('value', async snapshot => {
    /*...*/
    // Send a message to the device corresponding to the provided
    // registration token.

    try {
        const response = await admin.messaging().send(message);
        console.log('Successfully sent message:', response);
    } catch(e) {
        console.log('Error sending message:', error);
    }
});