Upload image to GCS thorugh REST API / Endpoints

[Bradford Stephens]

Hi there!

I can't find an example of this that strictly uses REST APIs, so I'm asking you all. I'm building a mobile photo-sharing app, with java on the server-side.

I want to:

-Upload an image to a REST API (preferably served by Endpoints) -- no browser

-Store that image in Google Cloud Storage

-Retrieve that image's URL and store it in datastore

The first two have me really puzzled...any example code out there?

[Alejandro Gonzalez]

This is basically the code:

com.google.appengine.api.images.Image image = YOU_IMAGE;

GcsService gcsService = GcsServiceFactory.createGcsService();

BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();

GcsFileOptions options = new GcsFileOptions.Builder()

                    .mimeType(p_contentType)

                    .acl("project-private")

                    .build();

GcsFilename p_filename = new GcsFilename(bucketName, secureFilename);

GcsOutputChannel writeChannel = gcsService.createOrReplace(p_filename, options);

writeChannel.write(ByteBuffer.wrap(image.getImageData()));

writeChannel.close();

BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + p_filename.getBucketName() + "/" + p_filename.getObjectName());

ImagesService imageService = ImagesServiceFactory.getImagesService();

ServingUrlOptions servoptions = ServingUrlOptions.Builder.withBlobKey(blobKey).secureUrl(true);

String url = imageService.getServingUrl(servoptions);

Alejandro González Rodrigo

www.nextinit.com

alejandro...@nextinit.com
+34  666 57 79 13

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[Vinny P]

On Fri, Feb 21, 2014 at 2:02 PM, Bradford Stephens <bradford...@gmail.com> wrote:

I want to:

-Upload an image to a REST API (preferably served by Endpoints) -- no browser

-Store that image in Google Cloud Storage

The first two have me really puzzled...any example code out there?

Endpoints doesn't accept the multipart/form-data encoding ( http://stackoverflow.com/a/15440083 ) so you can't upload the image directly to Endpoints. You'll have to configure a separate servlet to handle the file upload; Alejandro's code will handle that.

On the client side, you can use the standard HttpUrlConnection to open the upload URL and upload the file via DataOutputStream.

 

 

-----------------

-Vinny P

Technology & Media Advisor

Chicago, IL

App Engine Code Samples: http://www.learntogoogleit.com