You can use Cloud Storage to store and serve files, such as movies or images or other static content.
This document describes how to use the Google Cloud Client Library in your app to store data in and retrieve data from Cloud Storage.
Before you begin
Follow the instructions in "Hello, World!" for Java on App Engine to set up your environment and project, and to understand how Java apps are structured in App Engine. Write down and save your project ID, because you will need it to run the sample application described in this document.
Make sure you create a Cloud Storage bucket for your application by invoking the following command:
gsutil mb gs://[YOUR_BUCKET_NAME]
Make the bucket publicly readable so it can serve files:
gsutil defacl set public-read gs://[YOUR_BUCKET_NAME]
Download the sample
To clone the repository:
git clone https://github.com/GoogleCloudPlatform/java-docs-samples
cd java-docs-samples/flexible/cloudstorage
Edit project configuration and install dependencies
In app.yaml
, set the BUCKET_NAME
to the Cloud Storage you previously created for your project.
In pom.xml
, set com.google.cloud
as a dependency, and specify
google-cloud-storage
as the artifactID for that dependency; this provides
the functions to use Cloud Storage.
Application code
The sample application presents a web page prompting the user to supply a file
to be stored in Cloud Storage. When the user selects a file and clicks
submit, the doPost
request handler writes the file to the
Cloud Storage bucket using
Storage.create
Notice that to retrieve this file from Cloud Storage, you will need to specify the bucket name and the filename. You should store these values in your app for future use.
For more information
For complete information on Cloud Storage, see the Cloud Storage documentation.