Set Firebase Storeage file size and File number limit - firebase

Question

I am successfully uploading images using AngularFire2 to Firebase Storage.
I have the following upload code.
this.AfStorage.ref(`images/${userId}/${timeStamp}`).putString(base64Image,'data_url');
There are a few issues that I want to solve.
How can I set a limit on the file size? Meaning I want the user to be able to upload files which are less than 10mb.
How can I limit the file number? Meaning I want one user to be able to upload only 3 files.
If there are no firebase server size solutions do suggest some client size solutions.
Thanks

Answer 1

To limit the size of uploads, see this example from the documentation:
service firebase.storage {
match /b/{bucket}/o {
match /images {
// Cascade read to any image type at any path
match /{allImages=**} {
allow read;
}
// Allow write files to the path "images/*", subject to the constraints:
// 1) File is less than 5MB
// 2) Content type is an image
// 3) Uploaded content type matches existing content type
// 4) File name (stored in imageId wildcard variable) is less than 32 characters
match /{imageId} {
allow write: if request.resource.size < 5 * 1024 * 1024
&& request.resource.contentType.matches('image/.*')
&& request.resource.contentType == resource.contentType
&& imageId.size() < 32
}
}
}
}
There is no way to limit the number of files with security rules, so you'll have to look at workarounds such as shown here:
https://groups.google.com/forum/#!topic/firebase-talk/ZtJPcEJr0Mc (seems to hint this is possible, but I've never tried it)
limit number of children with storage rules
Limit number of files in a firebase storage path