Introducción a la API de administrador de Cloud Storage
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Cloud Storage for Firebase almacena tus datos en un bucket de Google Cloud Storage: una solución de almacenamiento de objetos a escala de exabytes con alta disponibilidad y redundancia global. El SDK de Firebase Admin te permite acceder directamente a tus buckets de Cloud Storage de entornos privilegiados Luego, puedes usar las APIs de Google Cloud Storage para manipular los objetos almacenados en los buckets.
Admin SDK también te permite crear URLs que se pueden compartir para que los usuarios puedan descargar objetos en tus buckets.
Usa un bucket predeterminado
Cuando inicialices el SDK de Admin, puedes especificar el nombre de un bucket predeterminado. Luego, puedes recuperar una referencia autenticada a este depósito.
El nombre del bucket no debe contener gs:// ni ningún prefijo de protocolo.
Por ejemplo, si la URL del bucket que se muestra en
Firebase console
es gs://PROJECT_ID.firebasestorage.app, pasa la cadena
PROJECT_ID.firebasestorage.app al SDK de Admin.
Node.js
const{initializeApp,cert}=require('firebase-admin/app');const{getStorage}=require('firebase-admin/storage');constserviceAccount=require('./path/to/serviceAccountKey.json');initializeApp({credential:cert(serviceAccount),storageBucket:'<BUCKET_NAME>.appspot.com'});constbucket=getStorage().bucket();// 'bucket' is an object defined in the @google-cloud/storage library.// See https://googlecloudplatform.github.io/google-cloud-node/#/docs/storage/latest/storage/bucket// for more details.
Java
FileInputStreamserviceAccount=newFileInputStream("path/to/serviceAccountKey.json");FirebaseOptionsoptions=FirebaseOptions.builder().setCredentials(GoogleCredentials.fromStream(serviceAccount)).setStorageBucket("<BUCKET_NAME>.appspot.com").build();FirebaseApp.initializeApp(options);Bucketbucket=StorageClient.getInstance().bucket();// 'bucket' is an object defined in the google-cloud-storage Java library.// See https://cloud.google.com/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.Bucket// for more details.
Python
importfirebase_adminfromfirebase_adminimportcredentialsfromfirebase_adminimportstoragecred=credentials.Certificate('path/to/serviceAccountKey.json')firebase_admin.initialize_app(cred,{'storageBucket':'PROJECT_ID.firebasestorage.app'})bucket=storage.bucket()# 'bucket' is an object defined in the google-cloud-storage Python library.# See https://googlecloudplatform.github.io/google-cloud-python/latest/storage/buckets.html# for more details.
Go
import("context""log"firebase"firebase.google.com/go/v4""firebase.google.com/go/v4/auth""google.golang.org/api/option")config:=&firebase.Config{StorageBucket:"<BUCKET_NAME>.appspot.com",}opt:=option.WithCredentialsFile("path/to/serviceAccountKey.json")app,err:=firebase.NewApp(context.Background(),config,opt)iferr!=nil{log.Fatalln(err)}client,err:=app.Storage(context.Background())iferr!=nil{log.Fatalln(err)}bucket,err:=client.DefaultBucket()iferr!=nil{log.Fatalln(err)}// 'bucket' is an object defined in the cloud.google.com/go/storage package.// See https://godoc.org/cloud.google.com/go/storage#BucketHandle// for more details.
Puedes utilizar las referencias de buckets obtenidas del SDK de Admin, junto con las bibliotecas cliente oficiales de Google Cloud Storage, para subir, descargar y modificar contenido en los buckets asociados a tus proyectos de Firebase. Ten en cuenta que no es necesario autenticar las bibliotecas de Google Cloud Storage cuando usas el SDK de Firebase Admin. Las referencias de bucket que muestra el SDK de Admin ya están autenticadas con las credenciales que usaste para inicializar la app de Firebase.
Usa buckets personalizados
Si quieres usar un bucket de Cloud Storage distinto del bucket predeterminado
que se describió anteriormente en esta guía, o usas varios buckets de Cloud Storage en
una sola app, puedes recuperar una referencia de un bucket personalizado:
Si estás creando una aplicación más compleja que interactúa con
varias apps de Firebase, puedes
acceder a los buckets de Cloud Storage asociados con una app de Firebase específica
de la siguiente manera:
Puedes usar Admin SDK para generar una URL de descarga sin vencimiento para los archivos almacenados en tus buckets. Cualquier persona que tenga esta URL puede
acceder al archivo de forma permanente.
Los SDKs de Firebase Admin dependen de las bibliotecas cliente de Google Cloud Storage para proporcionar acceso a Cloud Storage. Las referencias de los buckets obtenidas del SDK de Admin son objetos definidos en estas bibliotecas. Consulta la documentación y las referencias de la API de las bibliotecas cliente de Google Cloud Storage para aprender a usar las referencias de buckets en casos de uso como la carga y descarga de archivos.
[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Falta la información que necesito","missingTheInformationINeed","thumb-down"],["Muy complicado o demasiados pasos","tooComplicatedTooManySteps","thumb-down"],["Desactualizado","outOfDate","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Problema con las muestras o los códigos","samplesCodeIssue","thumb-down"],["Otro","otherDown","thumb-down"]],["Última actualización: 2025-09-04 (UTC)"],[],[],null,["\u003cbr /\u003e\n\nCloud Storage for Firebase stores your data in a\n[Google Cloud Storage](//cloud.google.com/storage) bucket --- an\nexabyte scale object storage solution with high availability and global\nredundancy. The Firebase Admin SDK allows you to directly access your\nCloud Storage buckets from privileged environments. Then you can use\n[Google Cloud Storage APIs](//cloud.google.com/storage/docs/reference/libraries)\nto manipulate the objects stored in the buckets.\n\nThe Admin SDK also lets you to create shareable URLs so users can\ndownload objects in your buckets.\n| **Important** : The following changes to pricing plan requirements are happening for Cloud Storage for Firebase. Learn more in the [FAQs](/docs/storage/faqs-storage-changes-announced-sept-2024).\n|\n| - **Starting\n| October 30, 2024** , your Firebase project must be on the [pay-as-you-go Blaze pricing plan](/pricing) to provision a new Cloud Storage for Firebase default bucket. The bucket can optionally use the [\"Always Free\" tier](https://cloud.google.com/storage/pricing#cloud-storage-always-free) for Google Cloud Storage.\n| - **Starting\n| October 1, 2025** , your Firebase project must be on the [pay-as-you-go Blaze pricing plan](/pricing) to maintain access to your default bucket and all other Cloud Storage resources. Any `*.appspot.com` default bucket will maintain its current no-cost level of usage even on the Blaze pricing plan.\n\nUse a default bucket\n\nYou can specify a default bucket name when initializing the Admin SDK. Then you\ncan retrieve an authenticated reference to this bucket.\n\nThe bucket name must *not* contain `gs://` or any other protocol prefixes.\nFor example, if the bucket URL displayed in the\n[Firebase console](//console.firebase.google.com/project/_/storage)\nis `gs://`\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e`.firebasestorage.app`, pass the string\n\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e`.firebasestorage.app` to the Admin SDK. \n\nNode.js \n\n const { initializeApp, cert } = require('firebase-admin/app');\n const { getStorage } = require('firebase-admin/storage');\n\n const serviceAccount = require('./path/to/serviceAccountKey.json');\n\n initializeApp({\n credential: cert(serviceAccount),\n storageBucket: '\u003cBUCKET_NAME\u003e.appspot.com'\n });\n\n const bucket = getStorage().bucket();\n\n // 'bucket' is an object defined in the @google-cloud/storage library.\n // See https://googlecloudplatform.github.io/google-cloud-node/#/docs/storage/latest/storage/bucket\n // for more details.\n\nJava \n\n FileInputStream serviceAccount = new FileInputStream(\"path/to/serviceAccountKey.json\");\n\n FirebaseOptions options = FirebaseOptions.builder()\n .setCredentials(GoogleCredentials.fromStream(serviceAccount))\n .setStorageBucket(\"\u003cBUCKET_NAME\u003e.appspot.com\")\n .build();\n FirebaseApp.initializeApp(options);\n\n Bucket bucket = StorageClient.getInstance().bucket();\n\n // 'bucket' is an object defined in the google-cloud-storage Java library.\n // See https://cloud.google.com/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.Bucket\n // for more details.\n\nPython \n\n import firebase_admin\n from firebase_admin import credentials\n from firebase_admin import storage\n\n cred = credentials.Certificate('path/to/serviceAccountKey.json')\n firebase_admin.initialize_app(cred, {\n 'storageBucket': '\u003cvar translate=\"no\"\u003ePROJECT_ID\u003c/var\u003e.firebasestorage.app'\n })\n\n bucket = storage.bucket()\n\n # 'bucket' is an object defined in the google-cloud-storage Python library.\n # See https://googlecloudplatform.github.io/google-cloud-python/latest/storage/buckets.html\n # for more details.\n\nGo \n\n import (\n \t\"context\"\n \t\"log\"\n\n \tfirebase \"firebase.google.com/go/v4\"\n \t\"firebase.google.com/go/v4/auth\"\n \t\"google.golang.org/api/option\"\n )\n\n config := &firebase.Config{\n \tStorageBucket: \"\u003cBUCKET_NAME\u003e.appspot.com\",\n }\n opt := option.WithCredentialsFile(\"path/to/serviceAccountKey.json\")\n app, err := firebase.NewApp(context.Background(), config, opt)\n if err != nil {\n \tlog.Fatalln(err)\n }\n\n client, err := app.Storage(context.Background())\n if err != nil {\n \tlog.Fatalln(err)\n }\n\n bucket, err := client.DefaultBucket()\n if err != nil {\n \tlog.Fatalln(err)\n }\n // 'bucket' is an object defined in the cloud.google.com/go/storage package.\n // See https://godoc.org/cloud.google.com/go/storage#BucketHandle\n // for more details. \n https://github.com/firebase/firebase-admin-go/blob/26dec0b7589ef7641eefd6681981024079b8524c/snippets/storage.go#L31-L51\n\nYou can use the bucket references returned by the Admin SDK in conjunction with\nthe official\n[Google Cloud Storage client libraries](//cloud.google.com/storage/docs/reference/libraries)\nto upload, download, and modify content in the buckets associated with your\nFirebase projects. Note that you do not have to authenticate\nGoogle Cloud Storage libraries when using the Firebase Admin SDK. The bucket\nreferences returned by the Admin SDK are already authenticated with the\ncredentials used to initialize your Firebase app.\n\nUse custom buckets\n\nIf you want to use a Cloud Storage bucket other than the default bucket\ndescribed earlier in this guide, or use multiple Cloud Storage buckets in\na single app, you can retrieve a reference to a custom bucket: \n\nNode.js \n\n const bucket = getStorage().bucket('my-custom-bucket');\n\nJava \n\n Bucket bucket = StorageClient.getInstance().bucket(\"my-custom-bucket\");\n\nPython \n\n bucket = storage.bucket('my-custom-bucket')\n\nGo \n\n bucket, err := client.Bucket(\"my-custom-bucket\") \n https://github.com/firebase/firebase-admin-go/blob/26dec0b7589ef7641eefd6681981024079b8524c/snippets/storage.go#L64-L64\n\nUse a custom Firebase app\n\nIf you are building a more complicated application that interacts with\n[multiple Firebase apps](/docs/admin/setup#initialize-multiple-apps), you can\naccess the Cloud Storage buckets associated with a specific Firebase app\nas follows: \n\nNode.js \n\n const bucket = getStorage(customApp).bucket();\n\nJava \n\n Bucket bucket = StorageClient.getInstance(customApp).bucket();\n\nPython \n\n bucket = storage.bucket(app=custom_app)\n\nGo \n\n otherClient, err := otherApp.Storage(context.Background())\n bucket, err := otherClient.Bucket(\"other-app-bucket\")\n\nGet a shareable download URL\n\nYou can use the Admin SDK to generate a non-expiring download URL for\nfiles stored in your buckets. Anyone with this URL can permanently\naccess the file. \n\nNode.js \n\n const { getStorage, getDownloadURL } = require('firebase-admin/storage');\n\n const fileRef = getStorage().bucket('my-bucket').file('my-file');\n const downloadURL= await getDownloadURL(fileRef);\n\nGoogle Cloud Storage client libraries\n\nThe Firebase Admin SDKs depend on the\n[Google Cloud Storage client libraries](//cloud.google.com/storage/docs/reference/libraries)\nto provide Cloud Storage access. The bucket references returned by the\nAdmin SDK are objects defined in these libraries. Refer to the documentation and\nAPI references of the Google Cloud Storage client libraries to learn how to\nuse the returned bucket references in use cases like file\n[upload](//cloud.google.com/storage/docs/uploading-objects) and\n[download](//cloud.google.com/storage/docs/downloading-objects)."]]