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I am looking at writing a Java web application on Google App Engine. I want to be able to upload and serve images from the app but just realised that the Datastore have a 1MB limit. This is slightly too little for decent pictures. Is there an alternative way you can suggest of doing this? Perhaps storing those as static content rather than in the Datastore but there seems to be no API for this.
357
In the Google Cloud console, go to the Cloud Storage Buckets page. In the list of buckets, click on the name of the bucket that you want to upload an object to. In the Objects tab for the bucket, either: Drag and drop the desired files from your desktop or file manager to the main pane in the Google Cloud console.
To store data and files on App Engine, you can use Google Cloud services or any other storage service that is supported by your language and is accessible from your App Engine instance. Third-party databases can be hosted on another cloud provider, hosted on premises, or managed by a third-party vendor.
js, Java, Ruby, C#, Go, Python, or PHP. A fully managed environment lets you focus on code while App Engine manages infrastructure concerns. Use Cloud Monitoring and Cloud Logging to monitor the health and performance of your app and Cloud Debugger and Error Reporting to diagnose and fix bugs quickly.
Now it is possible on GAE. Simply you have to store your files in Blobstore. You can upload your files like this:
<body>
<form action="<%= blobstoreService.createUploadUrl("/upload") %>" method="post" enctype="multipart/form-data">
<input type="file" name="myFile">
<input type="submit" value="Submit">
</form>
And then to serve file from servlet:
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException {
BlobKey blobKey = new BlobKey(req.getParameter("blob-key"));
blobstoreService.serve(blobKey, res);
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