从Firebase到我的博客中获取数据库数据而无需身份验证

Question

I've followed the guide from a documentation of firebase on how to fetch the data.

I try to play around with the: sample of firebase here

However, to get database data need to auth. Is there anyway just only fetch like feed from firebase without auth? I need to read on my own blog to be read for public.

Please..help me to solve this issue.

Thanks.

Answer 1

You could set your rules to this:

{
  "rules": {
    ".read": "true",
    ".write": "auth != null"
  }
}

But this means anyone who has access the database can read all the data.

In your code you would do something like this:

firebase.database().ref("blogItems").on('value', function(snapshot) {
    console.log(snapshot.val());
});

If your setup is like this:

firebase-database-123
  |
  |_blogItems
      |
      |_entry1
      |
      |_entry2

Answer 2

I would recommend you get familiar with Firebase Database Security Rules . These are the ones which dictate who can read/write into the Firebase Database.

All new projects starts with the rules

{
 rules: {
  .read: auth != null,
  .write: auth != null
 }
}

This means anyone who isn't authenticated won't be able to read or write in our database.

To achieve what you might need without compromising other data you may do something like the following:

{
 rules: {
  .read: auth != null,
  .write: auth != null

  blogEntries: {
   .read: true,
   .write: auth != null
  }
 }
}

By doing this you are allowing everyone to read the data inside blogEntries, and this means ALL the data inside, while if someone wants to write data to blogEntries they should be authenticated.

I recommend watching The key to Firebase Security to further understand what can be achieved and how Security Rules work.

Answer 3

Yes, you can get the data without authenticating, but it's not recommended . I did the following setup in the Firebase. Step 1

Click on Realtime Database's GET STARTED

Step 2

Click on second option start in test mode you can access data without auth

or Add following lines in rules

{
  "rules": {
  ".read": true,
  ".write": true
  }
}