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You can download the latest version of the SDK here App Engine SDK - Release Notes Version 1.2.3 - June 18, 2009- Task Queue support available as google.appengine.api.labs.taskqueue.
- Django 1.0 support. You must install Django locally on your machine for the SDK but no longer need to upload it to App Engine.
- Urlfetch supports asynchronous requests.
- Urlfetch in SDK now matches App Engine more closely: By default, it now sets the referer header, does not set the Accept header, and sets Accept-Encoding to gzip.
- Fixed issue with httplib and absolute URLs.
- Memcache key length is no longer restricted to 250 bytes: longer keys will be replaced with a hash of the key.
- Datastore ancestor queries now work within transactions.
- Datastore transactions in SDK now snapshot on the first operation so they do not see writes made during the transaction. Matches App Engine.
Version 1.2.2 - May 8, 2009- New quota API which returns the CPU usage of the current request.
- from google.appengine.api import quota
- cpu_usage_so_far = quota.get_request_cpu_usage()
- Urlfetch fetch now has support for user configurable deadlines.
- Urlfetch in the SDK allows the Accept-Encoding header to match App Engine.
- urllib now supports HTTPS in addition to HTTP
- Datastore indexes on single properties can now be disabled by setting indexed=False on the property constructor.
- Datastore now supports Key-only queries, using either SELECT __key__ or db.Query(Model, keys_only=True)
- Fixed issues with Datastore IN filters and sorting: sort order is now correct, and can be used with key.
- Cron supports additional time specification formats.
- Fixed an issue in the dev_appserver admin console datastore viewer (/_ah/admin/datastore) with sorting columns containing None types.
- Bulk Loader improvements: New appcfg download_data command. Better backoff support and debugging output for long requests.
- New --vhost flag on appcfg.py request_logs command to select logs for a particular host.
- Python _ast module is now available for import
- Fixed issue with the color argument of the Images API composite method.
Version 1.2.1 - April 22, 2009- Stable, unique IDs for User objects. The Users service now provides a unique user_id for each user that stays the same even if a user changes her email address.
- The Images API now supports compositing images and calculating a color histogram for an image.
- New allowed mail attachment types: ics, vcf
- Urlfetch requests can now set the User-Agent header.
- An App Engine-specific version of the Python PyCrypto cryptography library is now available. Learn more at http://code.google.com/appengine/docs/python/tools/libraries.html
- The bulk loader configuration format has changed to allow non-CSV input. This change is not backwards compatible, so you will need to update your code. An early release of the bulk downloader is also now available in bulkloader.py. Learn more about these changes at: http://code.google.com/appengine/docs/python/tools/uploadingdata.html
- Fixed parsing of unicode GQL queries.
- Fixed dev_appserver security restrictions for os.path
- Fixed Reply-To header set in emails sent from dev_appserver.
Version 1.2.0 - April 7, 2009 Version 1.1.9 - February 2, 2009- HTTP Request and Response limit raised to 10MB from 1MB. Note that API call limits remain at 1MB.
- urllib and urllib2 now available, implemented using urlfetch. Also adds additional stubs which may enable other modules.
- Early release of a new data bulk upload tool, bulkloader.py
- New remote_api for datastore at google.appengine.ext.remote_api
- Single property descending indexes are automatically generated.
- Added db.Query support for IN and != operators.
- Fixed issue where gql date/time parsing could not handle Unicode strings.
- Fixed issue with db model instance key() returning the wrong key for unsaved instances with parent as key
- New run_in_transaction_custom_retries method for datastore.
- Fixed issue with relative dev_appserver datastore and history paths.
- Static files and skipped files are not readable in dev_appserver, to match the behavior on App Engine.
- Images API allows multiple transforms of the same type in one request. A limit of 10 total transforms per request has been added.
- PIL import will work with both PIL.Image and Image.
- Fixed an issue with sending email in dev_appserver when the application code changed.
- Memcache counters (incr/decr) do nothing on non positive integers to match the behavior on App Engine.
Version 1.1.8 - January 7, 2009- Skip_files RegexStr validator allows lists to for regex-ors.
- sys.path and sys.argv are no longer reset for each request.
- New ByteString data type for the datastore. Indexed non-text short-blob.
- UserProperty now takes auto_current_user and auto_current_user_add attributes.
- Support for polymorphic models and queries.
- db.Model.order() now supports key.
- Urlfetch no longer sets content-length: 0 when there is no body.
- Get height and width of an image via the Images API.
- Limit auto-Bcc of email sender to the case where the email sender is the currently-logged-in user.
- Adds limit of 100 order/filters on datastore query size to the SDK.
- Fix unicode support for the bulkloader
- Bulkload.py from the appengine/tools directory to the appengine/ directory
- Modify webapp to use logging.exception instead of logging.error.
- Additional fixes to SDK sanitizing response headers to match production.
Version 1.1.7 - November 20, 2008- Fixed an issue with urlfetch response headers.
Version 1.1.6 - November 17, 2008- Datastore now supports filtering and sorting on the key special property, which evaluates to each entity's key.
- Fixed a bug where it was possible to append None to ListProperty.
- Datastore appengine.ext.db models allow deletion by key without instantiating a model instance.
- Datastore models allow access to key name before put() if key_name given.
- Datastore fetch max results and max query offset match production limits.
- Fixed an issue in production where query fails with NeedIndexError when a model has two ancestor indexes.
- Allow trailing whitespace in PropertyValueFromString for datetime.
- Fixed to_xml on models with binary data in a BlobProperty: they now are base64 encoded. Note: This changes XML serialization.
- Fixed an issue with setting expando attributes.
- Fixed an issue where TypeError was raised instead of NeedIndexError for "merge join" queries, i.e. queries with only equals filters and no ancestor or sort orders, that still need an index.
- URLFetch in the SDK now has the same 5 second timeout to match production.
- URLFetch response headers are combined
- URLFetch now uses original method when following a redirect.
- URLFetch logs a warning when using a non standard port.
- URLFetch allows integers as values in request headers.
- Enforce response size and API request size limits to match production.
- SDK sanitizes response headers to match production
- Login URLs now require login in the SDK to match production.
- Fixed an issue with long URLs in HTTP 302 redirect responses.
- Fixed an issue with regular expressions in static_files in app.yaml
- SDK only allows "C" locale to match production.
- Support the bufsize positional arg in open()/file().
- lstat is aliased to stat.
- appcfg handles index building errors more gracefully.
- Fixed an issue with symlinks in the path to the Python core libraries.
Version 1.1.5 - September 29, 2008- Additional fixes for file paths on Windows and OSX.
- Sped up the datastore stub.
- Allow different types in list properties in datastore.Entity and Expando.
- Add add_multi and replace_multi to memcache API.
- Ignore errors from the API proxy when calling memcache read methods.
- Set the webapp Request charset property more accurately from CONTENT_TYPE.
- Fixed an issue in the development console with schema caching.
- Fixed an issue with StringListProperty not returning a class
- Fixed an issue in the development console where quotes couldn't be used within fields.
- Fixed an issue with TimeProperty("0:0") (midnight).
Version 1.1.4 - September 26, 2008- Fixed issue with incorrectly escaping static_files paths on Windows.
- Workaround -inf not being supported on Windows in Datastore.
Version 1.1.3 - September 8, 2008- Added support for zipimport.
- Added zipserve module for serving static content from a zip file.
- See google/appengine/ext/zipserve/init.py for more information.
- Added a memcache viewer to the development console.
- Added new follow_redirects flag to the URLFetch service.
- Fixed caching headers for static content.
- Fixed an issue with incorrectly escaping paths on Windows.
- Fixed an issue with the current directory while running applications.
Version 1.1.2 - August 20, 2008- Batch puts across Datastore entity groups.
- Transaction retries reduced from 10 to 3.
- Fixed certain transaction failures being silent.
- Added support for indexes with a single repeated property.
Version 1.1.1 - July 24, 2008- Fixed DELETE for URLFetch on dev_appserver.
- Fixed PATH_INFO to be un-escaped version of the path.
- Fixed order function testing for property on Expando class.
- Support all mail attachment mime-types under Windows.
- Added support for date and time objects to GQL.
- Fixed memcache KeyError problem.
- Default URLFetch POST content-type is x-www-form-urlencoded.
- Fixed problems where global variables would be set to None when a request raised an exception or returned an error response.
- Added support for GIFs and JPEG using PIL.
- Added support for type conversion of literals to GQL.
- Added support for pickling Expando instances.
- Added APPLICATION_ID environment variable to runtime.
- Added support for key_name to djangoforms.
- Added ability to put multiple transaction groups in one request outside of transactions.
- Added support for downloading request logs using appcfg.
- Fixed DateProperty not supporting values before 1970 and beyond Jan. 19, 2038.
- Set cap of 5000 indexed properties per entity.
- GoogleAppEngineLauncher now has context menus in the main project window.
- UI improvements to GoogleAppEngineLauncher preferences window.
- Fixed GoogleAppEngineLauncher broken symlink for bulk_uploadclient.
Version 1.1.0- Added an API for image manipulation.
- Added memcache API.
- Fixed urlfetch for urls with query strings.
- Added support for multiple values for the same filter string.
- Fixed urlfetch's referer to now set itself to the application's hostname.
- Added --show_mail_body flag to dev_appserver.py
- Added support for IN and != to GQL.
- Fixed urlfetch to accept strings as well as constant integers.
- Added CURRENT_VERSION_ID environment variable.
- Fixed uploading issues affecting @googlemail.com developers.
- Fixed Datastore API to allow the assignment of to non-dynamic db attributes.
- Fixed NeedIndexError to include the index that the query needed.
Version 1.0.2- Fixed UTC timezone issue on Windows.
- Fixed webapp template cache bug.
- URLFetch service redirect behavior now matches deployed behavior.
- Better handling of bad HOMEDRIVE parameters on Windows.
- Fixed HTTP response header termination.
- Fixed behavior with source files that have Windows line-endings or missing line-endings.
- Fixed C-Extension module loading issues.
- Fixed Windows DLL extension loading issues.
- Added missing os.uname function.
- Windows installer can now over-install.
- Windows installer now allows installation even if it can't find Python.
- Fixed skip_files exception.
- Better error handling for cookie-file related problems.
- User platform, SDK version, and Python version are now supplied to server-side on deployment; also supplied on dev_appserver start-up if the "nag" is enabled.
Version 1.0.1- Fixed app.yaml static_dir attribute on Windows.
- Fixed uploading large files on OSX.
- Fixed recursion issue in webapp template rendering cache.
- Fixed MacPorts installation.
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