Firebase cloud function download file

Test functions. Monitor functions. API Reference. Security Rules. Understand Security Rules. Write Security Rules. Test Security Rules. Use an extension in your project. Extensions by Firebase. Trigger Email. Related products. Catch up on everthing we announced at this year's Firebase Summit. Learn more. Trigger a function on Cloud Storage changes Use functions. Depending on whether you want to scope your function to a specific Cloud Storage bucket or use the default bucket, use one of the following: functions.

For example, the thumbnail generator sample is scoped to the default bucket for the project: exports. This event indicates that the live version of an object has become an archived version, either because it was archived or because it was overwritten by the upload of an object of the same name.

This includes objects that are overwritten or are deleted as part of the bucket's lifecycle configuration. Add and manage data. Read data. Secure and validate data. Usage, limits, and pricing. Cloud Firestore integrations. API reference. Machine Learning.

Custom Models. Use a custom model. Migrate from the legacy API. Label images with your models. Detect objects with your models. Recognize text. Label images. Machine Learning. Custom Models. Use a custom model. Migrate from the legacy API. Label images with your models. Detect objects with your models. Recognize text. Label images. Recognize landmarks. Deprecated Vision SDKs. Advanced Topics. Prepare for Production. Protect your Cloud credentials.

Legacy Documentation. ML Kit for Firebase. Detect faces. Scan barcodes. To ensure that the app has permission to write to this location the Cloud Storage rules need to be modified.

Open the Firebase console in a browser window and select the Storage option. Within the Storage screen, click on the Rules tab and change the rules to the following:. The cloud function will make use of the child-process-promise and Google Cloud Storage Node. The cloud function will be added to the same index. If you have not yet created the project used in earlier chapters, refer to the steps in the chapter entitled Installing the Firebase CLI. The function begins by extracting some properties from the event data and assigning them to constants.

A constant is also declared containing the path to the temporary file that will be used during the image conversion:. If the filename has this prefix, it means that this event has been triggered by the function itself uploading the converted file.

API reference. Machine Learning. Custom Models. Use a custom model. Migrate from the legacy API. Label images with your models. Detect objects with your models. Recognize text. Label images. Recognize landmarks. Deprecated Vision SDKs. Advanced Topics. Prepare for Production. Protect your Cloud credentials.