upload images into google app engine

[hitesh jain]

Hi,

I am making an restful call to my application which is deployed in google app engine. I pass in the image url to the http request. I want to fetch the image content from the URL and store the byte data into appengine. To fetch the image data I can use

URLFetchService. 

To store the image data which can be more than 1 mb what is the best way to do that? In this datastore entity I think I can 
store only 1MB byte array.
Once image is stored then I want to get the url of that image so that it can be accessed later on anytime.

I have seen google blob store service but that expects HttpRequest as input parameter and I will have to use the 
httpclient api to create a POST request and submit to the upload url as generated blobstoreService.createUploadUrl("/upload")

Is there any other better way to do this?

[Jeff Schnitzer]

We write image data to the blobstore with the Files API:

https://developers.google.com/appengine/docs/java/blobstore/#Java_Writing_files_to_the_Blobstore

We're still watching to see what Google is going to do with this api
and the blobstore, but for now it works.

Jeff

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[Andy Dennie]

On Monday, March 10, 2014 4:09:31 AM UTC-4, hitesh jain wrote:

Hi,

I am making an restful call to my application which is deployed in google app engine. I pass in the image url to the http request. I want to fetch the image content from the URL and store the byte data into appengine. To fetch the image data I can use

URLFetchService. 

To store the image data which can be more than 1 mb what is the best way to do that? In this datastore entity I think I can 
store only 1MB byte array.
Once image is stored then I want to get the url of that image so that it can be accessed later on anytime.

[...] 

Is there any other better way to do this?

I've taken an approach where I write the image file to GCS, store its bucket name and file name in a datastore entity, and then either serve it directly from GCS or from the ImagesService's getServingUrl (the latter if the client wants any transformations applied first).  I encapsulate the storage mechanism by having the client access a URL specific to my service first (e.g. /myservice/images/12345), and then redirecting to the appropriate serving URL. 

See https://github.com/adennie/vroom/tree/master/samples/vroom-sample-webservice for example code.

-Andy