Firebase Lambda nodeJS 4.3未完成/执行成功回调
尽管在日志语句的正上方运行了log语句,但我对Firebase Lambda nodeJS 4.3未完成/执行成功回调,firebase,aws-lambda,Firebase,Aws Lambda,尽管在日志语句的正上方运行了log语句,但我对callback(null)的调用不起作用。甚至试着把它包在试抓块里,但一无所获 以下是完整的功能供参考: var Firebase = require('firebase'); var request = require('request'); //noinspection AnonymousFunctionJS /** * * @param event - from Lambda * @param context - from Lambd
callback(null)
的调用不起作用。甚至试着把它包在试抓块里,但一无所获
以下是完整的功能供参考:
var Firebase = require('firebase');
var request = require('request');
//noinspection AnonymousFunctionJS
/**
*
* @param event - from Lambda
* @param context - from Lambda
* @param callback - from Lambda
*/
exports.handler = function (event, context, callback) {
var AUTOPILOT_API_KEY = getKey(event.stage, 'AUTOPILOT_API_KEY');
var AUTOPILOT_JOURNEY_ID = getKey(event.stage, 'AUTOPILOT_JOURNEY_ID');
activate();
function activate () {
console.log('event:', event);
if (validPayload(event, context)) {
addDefaultPresets(event.uid);
addToAutopilot(event.user, event.uid);
}
}
/**
* checks that the necessary payload has been received
* if YES: returns true and allows process to continue
* if NO: throws context.fail with useful error message(s)
* operating under custom error code naming convention of
* http code + 3 digit ULM error code
* @param event - from Lambda
* @param context - from Lambda
* @returns {boolean} - whether the payload contains the required data
*/
function validPayload (event, context) {
return true; // REDACTED FOR BREVITY
}
/**
* Adds the user to Autopilot as a contact and adds them
* to the journey with trigger id 0001
* @param {Object} user
* @param {string} uid generate by Firebase as unique identifier of registered user
*/
function addToAutopilot (user, uid) {
// REDACTED FOR BREVITY
request({
method: 'POST',
url: 'https://api2.autopilothq.com/v1/trigger/' + AUTOPILOT_JOURNEY_ID + '/contact',
headers: {
'autopilotapikey': AUTOPILOT_API_KEY,
'Content-Type': 'application/json'
},
body: JSON.stringify(payload)
}, function (error, response, body) {
//noinspection MagicNumberJS
if (response.statusCode !== 200) {
errorResponse.status = response.statusCode;
errorResponse.error = {
errorMessage: error,
user: event.user,
response: response,
body: body
};
console.log('should throw ERROR callback');
context.fail(JSON.stringify(errorResponse));
} else {
console.log('should throw SUCCESS callback');
console.log(JSON.stringify({
status: response.statusCode,
message: "User successfully added to Autopilot account & journey"
}));
callback(null);
}
console.log('Finished addToAutopilot()');
});
}
/**
* Adds a collection of presets the the account of the new user
* @param uid {String} - Firebase UID
*/
function addDefaultPresets (uid) {
// REDACTED FOR BREVITY
var presets = ref.child('users').child(uid).child('presets');
console.log('Starting addDefaultPresets()');
activate();
function activate () {
console.info('activating...');
// for each field
fields.forEach(function (field) {
// iterate over each preset
presetData[field].forEach(function (label) {
// and add to firebase db via addDefaultPreset() if unique
presetIsUnique(field, label);
})
});
console.log('Finished addDefaultPresets()');
}
function presetIsUnique (field, label) {
presets.child(field).orderByChild('label')
.equalTo(label)
.once('value', function (snapshot) {
var val = snapshot.val();
if (!val) {
addDefaultPreset(field, label);
} else {
console.error('already exists', field, label);
}
});
}
function addDefaultPreset (field, label) {
//noinspection MagicNumberJS
presets.child(field).push().set({
creator: 'default',
dateAdded: Math.floor(Date.now() / 1000),
label: label
}, setCallback);
}
function setCallback (err) {
if (err) {
console.error(err);
} else {
console.info('added preset');
}
}
}
function getKey (stage, keyId) {
var keys = {
AUTOPILOT_API_KEY: {
staging: 'dev123',
prod: 'prod123'
},
AUTOPILOT_JOURNEY_ID: {
staging: 'XXX',
product: 'XXXX'
},
FIREBASE_URL: {
staging: 'https://staging.firebaseio.com/',
prod: 'https://prod.firebaseio.com/'
}
};
if (stage === 'prod') {
return keys[keyId][stage];
} else {
return keys[keyId]['staging'];
}
}
};
firebase似乎在事件循环中保留了一些东西。默认情况下,lambda会等待事件循环为空后再终止。您可以设置
context.callbackhaitsforemptyeventloop=false
,告诉lambda在调用回调后立即终止函数,即使事件循环中仍有项 经过一个又一个小时的调试,这里有一些东西对我很有用:
var firebase = require('firebase');
var app = firebase.initializeApp(config);
...
...
...
app.delete().then(function(){
var response = {
statusCode: 200,
body: JSON.stringify({
message: 'Success'
}),
};
callback(null, response);
});
有关删除
的更多信息,请参见:
使给定的应用程序不可用,并释放所有相关应用程序的资源
服务
希望这是有帮助的 “不工作”是什么意思?你期望发生什么,实际发生了什么?另外,我注意到您正在使用
context.fail(JSON.stringify(errorResponse))
,此函数在nodejs4.3环境中不可用,您应该执行带错误的calback(回调(错误)
)@Jonathansed当我说“不工作”时,函数将保持运行,直到超时,然后返回错误消息说超时。它完成了任务,但它运行的时间比它应该运行的时间长得多,这需要花费金钱并抛出误导性错误。明白了。有趣的。。。我有个主意,但这可能是个骗局。默认情况下,lambda会等到事件循环为空后再冻结进程。事件循环中是否存在导致函数继续的内容?您可以通过设置context.callbackhaitsforemptyeventloop=false来测试这一点代码>。这将导致lambda在调用回调后立即冻结进程,即使事件中存在事件loop@JonathanSeed我打赌你一定有什么发现。Firebase可能正在保持连接打开。我会试试看,然后再报告。还可能在回调中显式杀死Firebase引用。@Jonathansed它解决了这个问题!在Firebase完成工作后,尝试了一些方法来清除事件循环/打开连接,但没有成功。是否有办法通过日志语句或其他方式调试事件循环中的活动内容?这似乎与Firebase有关。如果有Firebase开发人员查看并提供建议,那就太好了。我建议更新@temkin的以下上下文的正确答案。Callbackaitsforeptyeventloop会冻结该过程,但如果lamda也选择,它可以“重用”,谁知道事件队列将处于什么状态。如果您的意图是干净地退出函数,那么几乎可以肯定这不是您想要的。对不起,这是18个月前的事,还有几个项目。我的缓存很久以前就被清除了:(.我应该把app.delete部分放在哪里?