firebase_storage_web 3.3.22

The web implementation of firebase_storage

firebase_storage_web

The web implementation of firebase_storage.

Getting Started

To get started with Firebase Storage, please see the documentation available at https://firebase.flutter.dev

Once installed, Firebase Storage needs to be configured for Web Installation. Please see the documentation on Web Installation

To learn more about Firebase Storage, please visit the Firebase website

Downloading files with getData()

When using Reference::getData() in the web platform, your bucket must have the correct CORS configuration, or the security mechanisms in the browser will not let you access the downloaded data, with exceptions similar to:

Access to XMLHttpRequest at 'https://firebasestorage.googleapis.com/v0/b/...example.txt?alt=media&token=1234-4321-1234-4321-12341234' from origin 'http://your-web-app.domain.com:PORT' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

browser_client.dart:87 GET https://firebasestorage.googleapis.com/v0/b/...example.txt?alt=media&token=1234-4321-1234-4321-12341234 net::ERR_FAILED

or

Error: XMLHttpRequest error.
    dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 894:28                get current
packages/http/src/browser_client.dart 84:22                                       <fn>

You need to enable CORS response headers in your Google Cloud Storage Bucket, as described in the following document:

• Firebase > Docs > Guides > Download Files on Web.

In the example app, ensure there's a cors.json file:

firebase_storage/example$ cat cors.json
[
  {
    "origin": ["*"],
    "method": ["GET"],
    "maxAgeSeconds": 3600
  }
]

And then, with gsutil:

firebase_storage/example$ gsutil cors set cors.json gs://my-example-bucket.appspot.com
Setting CORS on gs://my-example-bucket.appspot.com/...

For much, much more information about CORS in Google Cloud Platform, see:

• Storage products > Cloud Storage > Documentation > Configuring cross-origin resource sharing (CORS)