几周前,我开始使用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/任务中,服务器将解析它们。在Firebase更改为version 3之后,我无法复制它,尽管Firebase队列已经更新,而且似乎没有其他人出现问题。这可能只是我的代码中的一个小错误,但是几天后我还没有找到它,如果有人能为我指出它,我会很感激的。
这里有我的服务器代码。当任务被添加到队列中时,它应该打印到控制台,但它没有。最后一行的推送显示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.这是我的客户代码。推送到队列/任务是成功的。
<!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>发布于 2016-05-24 22:45:52
这对我来说很管用:
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-你需要张贴一个结构,而不是一个值的任务。你可能会发现,如果不是
ref.push('this is a push from the client');您可以使用
ref.push({"name": "this is a push from the client"});此外,当您尝试执行来自网页的作业请求时,我相信您也需要对用户进行身份验证,因为应用程序初始化时,我认为不验证用户,而只是标识连接。
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('peter@pscott.com.au', '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>注意,您还需要在auth中为/queue路径添加用户和配置访问权限。我通过firebase auth/user控制台屏幕手动添加了peter@pscott.com.au的用户名和密码。
您想要细化的初学者配置。
{
"rules": {
".read": false,
".write": false,
"queue": {
".read": true,
".write": true
}
}
}如果像上面一样打开了auth,那么就可以使用curl测试命令行中的客户端请求:
curl -X POST -d '{"foo": "bar"}' https://heretikchess-250ed.firebaseio.com//queue/tasks.json 如果仍然有问题,可以从shell中检查所有的库版本。
## Display node version
npm -v
## ( mine is 3.9.0 )
npm list firebase
## mine is 3.0.2
npm list firebase-queue
## mine is 1.4.0https://stackoverflow.com/questions/37406271
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