Package: compscifirebaselite
Python interface to the Firebase’s REST APIInstallationpython-firebase highly makes use of therequestslibrary so before you begin, you need to have that package installed.$sudopipinstallrequests==1.1.0$sudopipinstallpython-firebaseGetting StartedYou can fetch any of your data in JSON format by appending ‘.json’ to the end of the URL in which your data resides and, then send an HTTPS request through your browser. Like all other REST specific APIs, Firebase offers a client to update(PATCH, PUT), create(POST), or remove(DELETE) his stored data along with just to fetch it.The library provides all the correspoding methods for those actions in both synchoronous and asynchronous manner. You can just start an asynchronous GET request with your callback function, and the methodTo fetch all the users in your storage simply do the following:fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',None)result=firebase.get('/users',None)printresult{'1':'John Doe','2':'Jane Doe'}The second argument ofgetmethod is the name of the snapshot. Thus, if you leave it NULL, you get the data in the URL/users.json. Besides, if you set it to1, you get the data in the url/users/1.json. In other words, you get the user whose ID equals to 1.fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',None)result=firebase.get('/users','1')printresult{'1':'John Doe'}You can also provide extra query parameters that will be appended to the url or extra key-value pairs sent in the HTTP header.fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',None)result=firebase.get('/users/2',None,{'print':'pretty'},{'X_FANCY_HEADER':'VERY FANCY'})printresult{'2':'Jane Doe'}Creating new data requires a POST or PUT request. Assuming you don’t appendprint=silentto the url, if you use POST the returning value becomes the name of the snapshot, if PUT you get the data you just sent. If print=silent is provided, you get just NULL because the backend never sends an output.fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',None)new_user='Ozgur Vatansever'result=firebase.post('/users',new_user,{'print':'pretty'},{'X_FANCY_HEADER':'VERY FANCY'})printresult{u'name':u'-Io26123nDHkfybDIGl7'}result=firebase.post('/users',new_user,{'print':'silent'},{'X_FANCY_HEADER':'VERY FANCY'})printresult==NoneTrueDeleting data is relatively easy compared to other actions. You just set the url and that’s all. Backend sends no output as a result of a delete operation.fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',None)firebase.delete('/users','1')# John Doe goes away.AuthenticationAuthentication in Firebase is nothing but to simply creating a token that conforms to the JWT standarts and, putting it into the querystring with the nameauth. The library creates that token for you so you never end up struggling with constructing a valid token on your own. If the data has been protected against write/read operations with some security rules, the backend sends an appropriate error message back to the client with the status code403 Forbidden.fromfirebaseimportfirebasefirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',authentication=None)result=firebase.get('/users',None,{'print':'pretty'})printresult{'error':'Permission denied.'}authentication=firebase.Authentication('THIS_IS_MY_SECRET','ozgurvt@gmail.com',extra={'id':123})firebase.authentication=authenticationprintauthentication.extra{'admin':False,'debug':False,'email':'ozgurvt@gmail.com','id':123,'provider':'password'}user=authentication.get_user()printuser.firebase_auth_token"eyJhbGciOiAiSFMyNTYiLCAidHlwIjogIkpXVCJ9.eyJhZG1pbiI6IGZhbHNlLCAiZGVidWciOiBmYWxzZSwgImlhdCI6IDEzNjE5NTAxNzQsICJkIjogeyJkZWJ1ZyI6IGZhbHNlLCAiYWRtaW4iOiBmYWxzZSwgInByb3ZpZGVyIjogInBhc3N3b3JkIiwgImlkIjogNSwgImVtYWlsIjogIm96Z3VydnRAZ21haWwuY29tIn0sICJ2IjogMH0.lq4IRVfvEGQklslOlS4uIBLSSJj88YNrloWXvisRgfQ"result=firebase.get('/users',None,{'print':'pretty'})printresult{'1':'John Doe','2':'Jane Doe'}ConcurrencyThe interface heavily depends on the standartmultiprocessinglibrary when concurrency comes in. While creating an asynchronous call, an on-demand process pool is created and, the async method is executed by one of the idle process inside the pool. The pool remains alive until the main process dies. So every time you trigger an async call, you always use the same pool. When the method returns, the pool process ships the returning value back to the main process within the callback function provided.importjsonfromfirebaseimportfirebasefromfirebaseimportjsonutilfirebase=firebase.FirebaseApplication('https://your_storage.firebaseio.com',authentication=None)deflog_user(response):withopen('/tmp/users/%s.json'%response.keys()[0],'w')asusers_file:users_file.write(json.dumps(response,cls=jsonutil.JSONEncoder))firebase.get_async('/users',None,{'print':'pretty'},callback=log_user)TODOAsync calls must deliver exceptions raised back to the main process.More regression/stress tests on asynchronous calls.Docs must be generated.