Task<RouterState> fromCloud(CancellationToken cancellationToken)
{
string url = string.Format(routerUrl, AVClient.CurrentConfiguration.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 = Json.Parse(result) as IDictionary<string, object>;
var expire = DateTime.Now.AddSeconds(long.Parse(routerState["ttl"].ToString()));
routerState["expire"] = expire.UnixTimeStampSeconds();
//save to local cache async.
AVPlugins.Instance.StorageController.LoadAsync().OnSuccess(storage => storage.Result.AddAsync(routerKey, result));
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)
{
return null;
}
});
}
Task<RouterState> readCache(CancellationToken cancellationToken)
{
try
{
return AVPlugins.Instance.StorageController.LoadAsync().OnSuccess(_ =>
{
var currentCache = _.Result;
object routeCacheStr = null;
if (currentCache.TryGetValue(routerKey, out routeCacheStr))
{
var routeCache = Json.Parse(routeCacheStr.ToString()) as IDictionary<string, object>;
var routerState = new RouterState()
{
groupId = routeCache["groupId"] as string,
server = routeCache["server"] as string,
secondary = routeCache["secondary"] as string,
ttl = long.Parse((routeCache["ttl"].ToString())),
};
return routerState;
}
return null;
});
}
catch
{
return Task.FromResult<RouterState>(null);
}
}