我几周前开始使用 Firebase，并在我的 Node.js 服务器代码上运行 Firebase 队列。客户端可以将消息推送到队列/任务，服务器将解析它们。在 Firebase 更改为版本 3 后，我无法复制此内容，即使 Firebase 队列已更新并且其他人似乎没有出现问题。这可能只是我的代码中的一个小错误，但几天后我还没有发现它，如果有人能为我指出它，我将不胜感激。
这里有我的服务器代码。每当将任务添加到队列中时，它都应该打印到控制台，但事实并非如此。最后一行的推送表明它能够连接到服务器。
var firebase = require('firebase');
var Queue = require('firebase-queue');
firebase.initializeApp({
serviceAccount: 'serviceAccountCredentials.json',
databaseURL: 'https://heretikchess-250ed.firebaseio.com/'
});
var ref = firebase.database().ref('queue');
var queue = new Queue(ref, function(data, progress, resolve, reject) {
console.log('This should print whenever a task is pushed onto the queue.')
console.log(data);
setTimeout(function() {
resolve();
}, 1000);
});
ref.push('this is a push from the server');
//This push works fine, so there's no problem connecting to the server.
这是我的客户端代码。推送到队列/任务成功。
<!doctype html>
<html lang='en'>
<head>
<meta charset="utf-8">
<title>Why won't my code work?</title>
<script src="https://www.gstatic.com/firebasejs/3.0.0/firebase.js"></script>
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js'></script>
</head>
<body>
<div>
<h3>Submit push to firebase</h3>
<button id='submitbutton' class='btn btn-default' type='button'>Submit</button>
</div>
<script>
var config = {
apiKey: "AIzaSyCJKI3tjnnuOIcx2rnOuSTUgncuDbbxfwg",
authDomain: "heretikchess-250ed.firebaseapp.com",
databaseURL: "https://heretikchess-250ed.firebaseio.com",
storageBucket: "heretikchess-250ed.appspot.com",
};
firebase.initializeApp(config);
var ref = firebase.database().ref('queue/tasks');
//Send message to queue/tasks
$('#submitbutton').click(function() {
ref.push('this is a push from the client');
})
</script>
</body>
</html>
最佳答案
这对我有用:
server.js
var firebase = require('firebase');
var Queue = require('firebase-queue');
firebase.initializeApp({
serviceAccount: 'serviceAccountCredentials.json',
databaseURL: 'https://heretikchess-250ed.firebaseio.com/'
});
var db = firebase.database();
var ref = db.ref("queue");
var queue = new Queue(ref, function(data, progress, resolve, reject) {
console.log('This should print whenever a task is pushed onto the queue.')
console.log(data);
setTimeout(function() { // NB: the record will be entirely removed when resolved
resolve();
}, 1000);
});
client.js
var firebase = require('firebase');
var Queue = require('firebase-queue');
firebase.initializeApp({
serviceAccount: 'serviceAccountCredentials.json',
databaseURL: 'https://heretikchess-250ed.firebaseio.com/'
});
var db = firebase.database();
var ref = db.ref("queue");
var task = {'userId': "Peter"};
// ref.child('tasks').push('this is a push from the client"});
// NB the above doesn't work because it's a string and not a structure
ref.child('tasks').push({"name": "this is a push from the client"}).then(function(){ process.exit();});
注意 - 您需要将结构而不是值发布到任务中。您可能会发现它可以工作如果而不是
ref.push('this is a push from the client');
你使用
ref.push({"name": "this is a push from the client"});
此外，在您尝试从网页执行作业请求的地方，我相信您还需要对用户进行身份验证，因为应用程序初始化我认为不会对用户进行身份验证，而只是识别连接。
index.html
<!doctype html>
<html lang='en'>
<head>
<meta charset="utf-8">
<title>Why won't my code work?</title>
<script src="https://www.gstatic.com/firebasejs/3.0.0/firebase.js">
</script>
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js'>
</script>
</head>
<body>
<div>
<h3>Submit push to firebase</h3>
<button id='submitbutton' class='btn btn-default' type='button'>Submit</button>
</div>
<script>
var config = {
apiKey: "AIzaSyCJKI3tjnnuOIcx2rnOuSTUgncuDbbxfwg",
authDomain: "heretikchess-250ed.firebaseapp.com",
databaseURL: "https://heretikchess-250ed.firebaseio.com",
storageBucket: "heretikchess-250ed.appspot.com",
};
firebase.initializeApp(config);
var ref = firebase.database().ref('queue/tasks');
// NEED TO AUTH THE CONNECTION AS A USER
firebase.auth().signInWithEmailAndPassword('<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="671702130215271714040813134904080a490612" rel="noreferrer noopener nofollow">[email protected]</a>', 'password').catch(function(error) {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// ...
}).then( function(){console.log('peter logged in')});
//Send message to queue/tasks
$('#submitbutton').click(function() {
ref.push({'frompeter':'this is a push from the client'});
})
</script>
</body>
</html>
请注意，您还需要添加用户并在/queue 路径的 auth 中配置访问权限。 我手动添加了[email protected]的用户名和密码通过 firebase auth/users 控制台屏幕。
您想要完善的入门配置。
{
"rules": {
".read": false,
".write": false,
"queue": {
".read": true,
".write": true
}
}
}
如果您按照上面的方式打开了身份验证，那么您将能够使用curl从命令行测试客户端请求:
curl -X POST -d '{"foo": "bar"}' https://heretikchess-250ed.firebaseio.com//queue/tasks.json
如果仍然有问题，也许可以从 shell 检查所有库版本。
## Display node version
npm -v
## ( mine is 3.9.0 )
npm list firebase
## mine is 3.0.2
npm list firebase-queue
## mine is 1.4.0
关于firebase - 更改为 Firebase 3 后，我的 Firebase 队列没有执行任何操作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37406271/