客户端是否在Asp.net Web API中连接

Question

我有一个很长的流媒体操作，如果客户端断开连接，我希望能够取消。

如何知道连接状态或客户端是否已断开连接？ 客户端很可能是一个Web浏览器。

 public async Task<HttpResponseMessage> SendStream(string account, string container)
{
    var responseContent = new PushStreamContent(async (stream, content, context) =>
    {
        do
        {
            //get some data
            stream.Write(chunkData, 0, chunkLength);

        } while (IsClientStileConnected && moreWork);

    }, "application/octet-stream");

    var response = Request.CreateResponse(HttpStatusCode.OK);
    response.Content = responseContent;

    return response;
}