Task <RouterState> fromCloud(CancellationToken cancellationToken)
{
string url = string.Format(routerUrl, AVClient.ApplicationId);
return(AVClient.RequestAsync(uri: new Uri(url),
method: "GET",
headers: null,
data: null,
contentType: "",
cancellationToken: CancellationToken.None).ContinueWith <RouterState>(t =>
{
var httpStatus = (int)t.Result.Item1;
if (httpStatus != 200)
{
throw new AVException(AVException.ErrorCode.ConnectionFailed, "can not reach router.", null);
}
try
{
var result = t.Result.Item2;
var routerState = AVClient.DeserializeJsonString(result);
var expire = DateTime.Now.AddSeconds(long.Parse(routerState["ttl"].ToString()));
routerState["expire"] = expire.UnixTimeStampSeconds();
AVClient.ApplicationSettings["RouterState"] = Json.Encode(routerState);
var routerStateObj = new RouterState()
{
groupId = routerState["groupId"] as string,
server = routerState["server"] as string,
secondary = routerState["secondary"] as string,
ttl = long.Parse(routerState["ttl"].ToString()),
};
return routerStateObj;
}
catch (Exception exception)
{
return null;
}
}));
}
Task <RouterState> readCache(CancellationToken cancellationToken)
{
try
{
var cache = AVClient.DecodeQueryString(AVClient.ApplicationSettings["RouterState"] as string);
var routerState = new RouterState()
{
groupId = cache["groupId"] as string,
server = cache["server"] as string,
secondary = cache["secondary"] as string,
ttl = long.Parse(cache["ttl"]),
};
return(Task.FromResult <RouterState>(routerState));
}
catch
{
return(Task.FromResult <RouterState>(null));
}
}
