Re: blobstore not allowing access to a file <1 mb with one api call + zip files

You'll need to start a task to do the job, but tasks are limited to
30s. In this case you use the mapreduce api, to read the entire blob
you upload and do what you need.

Here is my Demo GWT project for Blobstore upload: http://demofileuploadgae.appspot.com/
Here is code for the demo:
http://code.google.com/p/gwt-examples/source/browse/#svn/trunk/DemoUpload/src/org/gonevertical/upload/server/mapreduce

This doesn't have the exact code you need, but has the frame you'll
need to get going with the api. It works fantastic for reading blobs.

Hope that helps,
Brandon Donnelson

On Aug 20, 10:46 am, GKotta <guruko...@gmail.com> wrote:
> Hi,
>
> I have my users upload a zip file full of images (all of which are
> less than 1 mb, so theoretically, I should be able to access each
> image with one api call.) The problem is that this doesn't work in
> practice. I want to use theblobstoreto upload the zip file then put
> each individual image in the datastore. Below is my code. The method
> getNextEntry() reads the next ZIP file entry and positions the stream
> at the beginning of the entry data.
>
> Map<String, BlobKey> blobs = blobstoreService.getUploadedBlobs(req);
>                 BlobKey blobKey = blobs.get("uploadFormElement");
>                 ZipInputStream zipper = new ZipInputStream(new
> BlobstoreInputStream(blobKey));
>                 ZipEntry entry = zipper.getNextEntry();
>                 int read;
>                 int start = 0;
>                 byte[] buffer = new byte[1048576];
>
>                 while ((read = zipper.read(buffer, start, buffer.length)) !=
> -1)
>                         start +=
> read;
>
>                 byte[] imageBytes = new byte[start];
>
>                 System.arraycopy(buffer, 0, imageBytes, 0, start);
>
>                 Blob imageBlob = new Blob(imageBytes);
>
> The exception that I get is "Caused by:
> com.google.apphosting.api.ApiProxy$ApplicationException:
> ApplicationError: 6: Blob fetch size too large." on the line "ZipEntry
> entry = zipper.getNextEntry();"
>
> Does anyone know how to solve this?
>
> Thanks!

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