foo.cs

[Function(nameof(GetLiveChannels))]
	public async Task<HttpResponseData> GetLiveChannels(
			[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequestData req,
			ILogger log
		)
	{

    var formData = new FormReader(req.Body);
    // There is no Form property.  How do we access the HTTP POST content?
		var channelIds = formData.GetValue("ChannelIdCsv").ToString().Split(',');