Version 1.5.1 released


    Major changes: X-AppEngine-country is created for each user request, Channel API - support for presence, Images API - WebP format added, ProtoRPC - new framework for creating RPC web services (Python only), emulation of High Replication Datastore consistency model. Details below ...


    Geolocation Header : App Engine now creates an “X-AppEngine-country” header for each client request. The header contains the result of an attempt to determine the country from which the request came.

    Additions to the Java and Python APIs
    • Channel API (presence support): Now you can configure the inbound service of the application to detect the presence of the user. Thus, the application can respond to connecting / disconnecting the user from the channel.
    • Images API (WebP support): Added support for images in WebP format. WebP is a new image format whose code Google opened earlier this year. The format provides lossy compression for images, while the size can be 39% smaller than a JPEG image of the same quality.

    New Python API
    • ProtoRPC : ProtoRPC is an open source framework for creating well-defined and easy-to-use RPC web services.

    Data store
    • High Replication Datastore (HRD) in the SDK : SDK 1.5.1 for Java and Python can now emulate the HRD consistency model. This means that query results will not always reflect the latest data changes.

    More information can be found here:

    Source: App Engine 1.5.1 Release

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