private void CompleteFetch(ExternalResource resource)
{
resource.Loaded.Set();
if(resource.Uri.IsFile)
{
// resource is a local file, setup a file watch
if (Settings.Default.WatchFiles)
{
WatchFile(resource);
}
}
else
{
// resource is a remote url, schedule a refetch
if (Settings.Default.ExternalResourceRefreshInterval > 0)
{
HttpRuntime.Cache.Add(Guid.NewGuid().ToString(), resource, null,
DateTime.Now.AddSeconds(Settings.Default.ExternalResourceRefreshInterval),
Cache.NoSlidingExpiration, CacheItemPriority.Default, Refetch);
}
}
}
public void Fetch(ExternalResource resource)
{
if (resource != null)
{
var wr = WebRequest.Create(resource.Uri);
var rs = new RequestState { Request = wr, Resource = resource };
var ar = wr.BeginGetResponse(ResponseCallback, rs);
ThreadPool.RegisterWaitForSingleObject(ar.AsyncWaitHandle, TimeoutCallback,
rs, Settings.Default.ExternalResourceTimeout * 1000, true);
}
}
public void Add(Uri resourceUri)
{
var key = resourceUri.GetKey();
AddInternal(key, () =>
{
FileInfo file;
ExternalResource resource;
if (resourceUri.TryMapPath(out file))
{
resource = new ExternalResource { Uri = new Uri(file.FullName) };
}
else
{
resource = new ExternalResource { Uri = resourceUri };
}
resources.Add(key, resource);
fetcher.Fetch(resource);
});
}
private void WatchFile(ExternalResource resource)
{
var file = new FileInfo(resource.Uri.LocalPath);
lock (directories)
{
if (!directories.ContainsKey(file.DirectoryName))
{
var fsw = new FileSystemWatcher(file.DirectoryName);
fsw.NotifyFilter = NotifyFilters.LastWrite;
fsw.Changed += OnFileChanged;
directories.Add(file.DirectoryName, new WatchedDirectory { Watcher = fsw });
}
var dir = directories[file.DirectoryName];
if (!dir.Resources.ContainsKey(file.Name))
{
dir.Resources.Add(file.Name, resource);
dir.Watcher.EnableRaisingEvents = true;
}
}
}