在下面的示例中,有没有办法获取写入/ messages / {pushId} / original的用户的uid?
exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onWrite(event => {
// Grab the current value of what was written to the Realtime Database.
const original = event.data.val();
console.log('Uppercasing', event.params.pushId, original);
const uppercase = original.toUpperCase();
// You must return a Promise when performing asynchronous tasks inside a Functions such as
// writing to the Firebase Realtime Database.
// Setting an "uppercase" sibling in the Realtime Database returns a Promise.
return event.data.ref.parent.child('uppercase').set(uppercase);
});
答案 0 :(得分:50)
更新的答案(v1.0.0 +):
如@Bery's answer above所述,Firebase Functions SDK的版本1.0.0
引入了一个新的context.auth
对象,其中包含uid
等身份验证状态。有关详细信息,请参阅"New properties for user auth information"。
原始答案(v1.0.0之前版):
是的,这在技术上是可行的,尽管目前没有记录。 uid
与event.auth
对象一起存储。从管理员情境(例如,从Firebase控制台数据查看器或管理SDK)触发数据库云功能时,event.auth
的值为:
{
"admin": true
}
从未经身份验证的引用触发数据库云功能时,event.data
的值为:
{
"admin": false
}
最后,当从authed(而非admin)引用触发数据库云功能时,event.auth
的格式为:
{
"admin": false,
"variable": {
"provider": "<PROVIDER>",
"provider_id": "<PROVIDER>",
"user_id": "<UID>",
"token": {
// Decoded auth token claims such as sub, aud, iat, exp, etc.
},
"uid": "<UID>"
}
}
根据上述信息,获得触发事件的用户uid
的最佳选择是执行以下操作:
exports.someFunction = functions.database.ref('/some/path')
.onWrite(event => {
var isAdmin = event.auth.admin;
var uid = event.auth.variable ? event.auth.variable.uid : null;
// ...
});
请注意,在上面的代码中,即使uid
为null
,isAdmin
仍为true
。您的确切代码取决于您的使用案例。
警告:这是目前未记录的行为,所以我会给出我一贯的警告:“未来的任何时候都可能会更改未记录的功能,恕不另行通知,甚至在非主要版本中也是如此。”
答案 1 :(得分:11)
自Firebase功能达到1.0版本以来,此行为不再是未记录的,但已经轻微改变。请务必阅读the docs。
已将上下文添加到云功能中,您可以像这样使用它
exports.dbWrite = functions.database.ref('/path/with/{id}').onWrite((data, context) => {
const authVar = context.auth; // Auth information for the user.
const authType = context.authType; // Permissions level for the user.
const pathId = context.params.id; // The ID in the Path.
const eventId = context.eventId; // A unique event ID.
const timestamp = context.timestamp; // The timestamp at which the event happened.
const eventType = context.eventType; // The type of the event that triggered this function.
const resource = context.resource; // The resource which triggered the event.
// ...
});