![]() In order to keep files private, developers are encouraged to restrict readĪccess by defining Firebase Storage security rules. To revoke a download URL, you need to manually revoke the download token in the Operation, but the download URL itself is public. Their hands on the download URL will be able to access the file, whether they'reĪuthorized or not! In order words, retrieving the download URL is a restricted Only one (long-lived) token stored per file. Method will return the same download URL for every invocation because there's Only authorized users can call getDownloadURL() (more on this below). The resulting download URL will look like this: Storage.ref( 'image.jpg').getDownloadURL() JavaScript SDK, but the concepts apply to all platforms.) const storage = firebase.storage() (The examples in this article are using the To retrieve a download URL, your client app needs to call the getDownloadUrl() It's a random UUIDv4, which makes the URL hard to guess. The download token is created automatically whenever a file is uploaded to Cloud Token which acts as a security measure to restrict access only to those who Public download URLs: Public, persistent, without securityĪ Firebase download URL is a long-lived, publicly accessible URL that is used. ![]() Signed, short-lived URLs ( getSignedUrl()): Public, short-lived, and hard.Persistent download URLs ( getDownloadUrl()): Public and long-lived, but.
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