Below is a tested python example showing how to write a JPEG to both GCS
using the "new" API and Blobstore. Note how VERY similar the process is
(all things considered). IMO Google did a terrific job making this
inevitable transition mostly seamless. The only possible prerequisite
setup required is to add your GAE service account name as a team member in
the Google APIs console where you enable/manage the Cloud Storage
service... as described in step #5 here:
https://developers.google.com/appengine/docs/python/googlestorage/
Note: Both examples below assume "img_data" contains JPEG image data such
as from
an images service transformation
#----------------------------------------------------------
# GCS image write & serving url
# Assumes: import cloudstorage as gcs
#----------------------------------------------------------
GCS_NAME_CHARS = string.ascii_letters + string.digits
rand = random.SystemRandom()
gcs_bucketname = '/yourbucket/'
# Create a random 32 char GCS filename
gcs_objectname = ''.join([rand.choice(GCS_NAME_CHARS) for _ in range(32)])
# Create and write the image data to the GCS object
gcs_fullname = gcs_bucketname + gcs_objectname
with gcs.open(gcs_fullname, 'w', content_type='image/jpeg') as gcs_file:
gcs_file.write(img_data)
gcs_file.close()
gcs_key = blobstore.create_gs_key('/gs' + gcs_fullname)
serving_url = images.get_serving_url(gcs_key)
#----------------------------------------------------------
# Blobstore image write & serving url
#----------------------------------------------------------
# Create and write the image data to the blobstore file
bs_filename = files.blobstore.create(mime_type='image/jpeg')
with files.open(bs_filename, 'a') as bs_file:
bs_file.write(img_data)
files.finalize(bs_filename)
# Get the serving url
blob_key = files.blobstore.get_blob_key(bs_filename)
serving_url = images.get_serving_url(blob_key)
On Tuesday, June 4, 2013 2:46:22 PM UTC-4, Richmond Manzana wrote:
>
> Hello Again Everyone!
>
> We've been busy since I/O!
>
> Pre-release SDKs for Python and Java here:
> http://code.google.com/p/**googleappengine/downloads/list<http://code.google.com/p/googleappengine/downloads/list>
>
> Please see the pre-release notes below.
>
> Cheers,
> Richmond Manzana
>
>
> App Engine Python SDK - Pre-Release Notes
>
> Version 1.8.1
> ===============================
> - The Task Queue async API is now a GA feature. The asynchronous methods
> improve utilization by allowing your app to add, lease and delete
> multiple
> tasks in parallel.
> - Cloud Console projects are now created by default whenever a new App
> Engine
> app is created. This is a Preview feature.
> - The Experimental Files API has been deprecated in favor of the Google
> Cloud
> Storage library, now available as a Preview feature.
> - Bandwidth between App Engine and Google Cloud Storage is currently free
> of
> charge (this may change in the future for certain levels of service).
> - The Search API has graduated from Experimental to Preview. Apps that have
> billing enabled can exceed the free quota levels and will be charged for
> usage above these levels.
> - Estimated number of search results will only be accurate if <= the
> number of
> results requested. By default this can be overridden by setting
> number_found_accuracy QueryOption in the Search API.
> - Dates, atoms, and number fields can now be found by searching without a
> field
> restriction in the Search API.
> - A quoted empty string now returns atom fields with empty values for the
> Search API.
> - Snippet and count functions are no longer allowed in sort expressions
> for the
> Search API.
> - The Search API now has improved error messages for user errors and
> internal
> errors.
> - The Datastore now assigns scattered auto ids by default. Legacy auto ids
> are still available via the 'auto_id_policy' option in app.yaml.
> - The Sockets API now allows client code to call get/set options against
> sockets. Previously, calls raised "Not Implemented" exceptions. For
> supported
> options, calls to getsockopt will return a mock value and calls to
> setsockopt
> will be silently ignored. Errors will continue to be raised for
> unsupported
> options. The currently supported options are: SO_KEEPALIVE, SO_DEBUG,
> TCP_NODELAY, SO_LINGER, SO_OOBINLINE, SO_SNDBUF, SO_RCVBUF, and
> SO_REUSEADDR.
> - The ndb library now supports distinct queries. This is a Preview feature.
>
> https://code.google.com/p/appengine-ndb-experiment/issues/detail?id=229
>
>
> App Engine Java SDK - Pre-Release Notes
>
> Version 1.8.1
> =============
> - This SDK will be the last release that can deploy Java 6 apps. In 1.8.2,
> the SDK will only be compiled with the Java 7 compiler and the only
> target
> runtime will be Java 7.
> - The Task Queue async API is now a GA feature. The asynchronous methods
> improve utilization by allowing your app to add, lease and delete
> multiple
> tasks in parallel.
> - Cloud Console projects are now created by default whenever a new App
> Engine
> app is created. This is a Preview feature.
> - The Experimental Files API has been deprecated in favor of the Google
> Cloud
> Storage library, now available as a Preview feature.
> - Bandwidth between App Engine and Google Cloud Storage is currently free
> of
> charge (this may change in the future for certain levels of service).
> - The Search API has graduated from Experimental to Preview. Apps that have
> billing enabled can exceed the free quota levels and will be charged for
> usage above these levels.
> - Estimated number of search results will only be accurate if <= the
> number of
> results requested. By default this can be overridden by setting X in the
> Search API.
> - Dates, atoms, and number fields can now be found by searching without a
> field
> restriction in the Search API.
> - A quoted empty string now returns atom fields with empty values for the
> Search API.
> - Snippet and count functions are no longer allowed in sort expressions
> for the
> Search API.
> - The Search API now has improved error messages for user errors and
> internal
> errors.
> - The Datastore now assigns scattered auto ids by default. Legacy auto ids
> are still available via the 'auto_id_policy' option in appengine-web.xml.
> - The Sockets API now allows client code to call get/set options against
> sockets. Previously, calls raised "Not Implemented" exceptions. When
> java.net.Socket.get<option>() is called, a mock value is returned, calls
> to
> set<option>() will be silently ignored.
>
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