您好,
websocket在Azure中可以使用。 在Azure website 服务中,free模式,基本模式或者是标准模式可以使用websocket,但您可以在Azure的portal中将该功能启用。
如图所示:

在基本模式中,每个网站只有350个可用连接,而标准模式不限。免费版本只有5个connection
详情参考这篇文档:
http://www.windowsazure.cn/home/features/web-site/#page_body_price
与此同时, 我推荐您可以看下这篇博客,其中附有一些code sample在内,请查阅:
http://azure.microsoft.com/blog/2013/11/14/introduction-to-websockets-on-windows-azure-web-sites/
Regards,
Will
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