如何从firebase下载图像到计算机

Question

My actual plan is that a Python script should download the latest uploaded image from Firebase to a Raspberry Pi or my computer (Ubuntu).

I already tried with gsutil like this:

from  google.cloud import storage

import os

os.environ["GOOGLE_APPLICATION_CREDENTIALS"]="finalpro.json"

client = storage.Client(project='finalpro-5d930')

bucket = client.get_bucket('gs://finalpro-5d930.appspot.com')

blob = storage.Blob('NewUploads/', bucket)

blob.download_to_filename('/home/simon/Documents/images')

I need only the Python script, so that I can initialise that script in the bashrc file on my Raspberry Pi, so that when the Raspberry Pi boots up, it runs that script automatically to download image from Firebase.

Answer 1

Installation

pip install firebase

Python Version

Firebase was written for python 3 and above and will not work correctly with python 2.

Add Firebase to your Application

Your Google's Firebase configuration data can be found on Firebase > Settings > Project Settings Scroll to bottom > Add to web app > config

For use with only user based authentication we can create the following configuration:

from firebase import Firebase

config = {
  "apiKey": "apiKey",
  "authDomain": "projectId.firebaseapp.com",
  "databaseURL": "https://databaseName.firebaseio.com",
  "storageBucket": "projectId.appspot.com"
}

firebase = Firebase(config)

Adding a service account will authenticate as an admin by default for all database queries, check out the Authentication documentation for how to authenticate users.

Storage

The storage service allows you to upload images to Firebase.

You first need to initialise your storage object:

storage = firebase.storage()

child

Just like with the Database service, you can build paths to your data with the Storage service.

storage.child("images/example.jpg")

put

The put method takes the path to the local file and an optional user token.

storage = firebase.storage()

# as admin
storage.child("images/example.jpg").put("example2.jpg")

# as user
storage.child("images/example.jpg").put("example2.jpg", user['idToken'])

download

The download method takes the path to the saved database file and the name you want the downloaded file to have.

storage.child("images/example.jpg").download("downloaded.jpg")

get_url

The get_url method takes the path to the saved database file and returns the storage url.

storage.child("images/example.jpg").get_url()

>> https://firebasestorage.googleapis.com/v0/b/storage-url.appspot.com/o/images%2Fexample.jpg?alt=media

I hope this helps. Read full docs: https://pypi.org/project/firebase

Answer 2

If you need url for individual photo then :-

url=storage.child("images/example.jpg").get_url(example.jpg)
print(url)