private void OnWrappedAdDownloadCompleted(object sender, DownloadStringCompletedEventArgs e)
{
var wc = sender as WebClient;
wc.DownloadStringCompleted -= OnWrappedAdDownloadCompleted;
var args = (Tuple <IAdSource, VASTAD, Action <VASTAD>, Action <VASTAD, Exception> >)e.UserState;
var source = args.Item1;
var ad = args.Item2;
var OnComplete = args.Item3;
var OnError = args.Item4;
if (e.Error == null)
{
Exception ex;
VAST vast;
if (VAST.Deserialize(e.Result, out vast, out ex) && vast != null)
{
var wrapperAd = (VASTADWrapper)ad.Item;
var key = GetAdSourceKey(wrapperAd.VASTAdTagURI, source.AltReference);
AvailableAds.Add(key, vast);
UnWrapAd(source, ad, OnComplete, OnError, vast);
}
if (ex != null)
{
OnError(ad, new Exception("Failed to deserialize VAST doc.", ex));
}
}
else
{
OnError(ad, new Exception("Unknown error downloading wrapped VAST doc", e.Error));
}
}
/// <summary>
/// Deserializes workflow markup into an VAST object
/// </summary>
/// <param name="xml">string workflow markup to deserialize</param>
/// <param name="obj">Output VAST object</param>
/// <param name="exception">output Exception value if deserialize failed</param>
/// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool Deserialize(string xml, out VAST obj, out System.Exception exception)
{
exception = null;
obj = default(VAST);
try
{
obj = Deserialize(xml);
return true;
}
catch (System.Exception ex)
{
exception = ex;
return false;
}
}
/// <summary>
/// Deserializes workflow markup into an VAST object
/// </summary>
/// <param name="xml">string workflow markup to deserialize</param>
/// <param name="obj">Output VAST object</param>
/// <param name="exception">output Exception value if deserialize failed</param>
/// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool Deserialize(string xml, out VAST obj, out System.Exception exception)
{
exception = null;
obj = default(VAST);
try
{
obj = Deserialize(xml);
return(true);
}
catch (System.Exception ex)
{
exception = ex;
return(false);
}
}
private void OnSourceDownloadCompleted(DownloadStringCompletedEventArgs e, VastAdUnit ad, Action <bool> Completed)
{
#if LATENCYTEST
var latencySimulatorTimer = new DispatcherTimer();
latencySimulatorTimer.Interval = TimeSpan.FromSeconds(3);
latencySimulatorTimer.Start();
latencySimulatorTimer.Tick += (ts, te) => {
#endif
if (e.Error == null)
{
Exception ex;
VAST vast;
if (VAST.Deserialize(e.Result, out vast, out ex) && vast != null)
{
var key = GetAdSourceKey(ad.Source);
if (!AvailableAds.ContainsKey(key))
{
AvailableAds.Add(key, vast);
}
ad.Vast = vast;
if (Completed != null)
{
Completed(true);
}
}
if (ex != null)
{
if (Completed != null)
{
Completed(false);
}
}
}
else
{
//Log.Output(OutputType.Error, "Unknown error handling VAST doc from source url: " + t.Source.uri);
if (Completed != null)
{
Completed(false);
}
}
#if LATENCYTEST
latencySimulatorTimer.Stop();
};
#endif
}
private void DownloadWrappedAd(IAdSource Source, VASTAD ad, Action <VASTAD> OnComplete, Action <VASTAD, Exception> OnError)
{
var wrapperAd = (VASTADWrapper)ad.Item;
var url = wrapperAd.VASTAdTagURI;
//look to see if we have a source already
var key = GetAdSourceKey(url, Source.AltReference);
if (AvailableAds.ContainsKey(key))
{
VAST vast = AvailableAds[key];
UnWrapAd(Source, ad, OnComplete, OnError, vast);
}
else
{
WebClient wc = new WebClient();
wc.DownloadStringCompleted += OnWrappedAdDownloadCompleted;
Uri uri = new Uri(url, UriKind.Absolute);
wc.DownloadStringAsync(uri, new Tuple <IAdSource, VASTAD, Action <VASTAD>, Action <VASTAD, Exception> >(Source, ad, OnComplete, OnError));
}
}
/// <summary>
/// Populates an AdUnit with the VAST info, downloads the VAST doc if necessary
/// </summary>
/// <param name="ad">The VastAdUnit to be populated</param>
/// <param name="Completed">Fired when the operation is complete, includes a status param</param>
internal void LoadAdUnitAsync(VastAdUnit ad, Action <bool> Completed)
{
if (!string.IsNullOrEmpty(ad.Source.Uri))
{
var key = GetAdSourceKey(ad.Source);
//look to see if we have a source already
if (AvailableAds.ContainsKey(key))
{
VAST vast = AvailableAds[key];
ad.Vast = vast;
if (Completed != null)
{
Completed(true);
}
}
else if (downloadingAds.ContainsKey(key))
{
// piggy back on the currently downloading doc
var wc = downloadingAds[key];
wc.DownloadStringCompleted += (s, e) =>
{
OnSourceDownloadCompleted(e, ad, Completed);
};
}
else
{
var wc = DownloadSource(ad, Completed);
downloadingAds.Add(key, wc); // add the webclient to a dictionary
}
}
else
{
if (Completed != null)
{
Completed(false);
}
}
}
public static bool Deserialize(string xml, out VAST obj)
{
System.Exception exception = null;
return Deserialize(xml, out obj, out exception);
}
private void UnWrapAd(IAdSource Source, VASTAD ad, Action<VASTAD> OnComplete, Action<VASTAD, Exception> OnError, VAST vast)
{
// there has to be a one to one relationship between wrapped ads and what their linear counterpart. However, a wrapped ad can point to an entire VAST doc which can contain many ads. Therefore, always just take the first one.
var newAd = vast.Ad.FirstOrDefault(a => a.Item != null);
if (newAd == null)
{
OnError(ad, new Exception("Wrapped ad was empty"));
}
else if (newAd.Item is VASTADWrapper)
{
DownloadWrappedAd(Source, newAd, OnComplete, OnError);
}
else
{
// plug the ad back into the parent
OnComplete(newAd);
}
}
public static bool Deserialize(string xml, out VAST obj)
{
System.Exception exception = null;
return(Deserialize(xml, out obj, out exception));
}
private void UnWrapAd(IAdSource Source, VASTAD ad, Action <VASTAD> OnComplete, Action <VASTAD, Exception> OnError, VAST vast)
{
// there has to be a one to one relationship between wrapped ads and what their linear counterpart. However, a wrapped ad can point to an entire VAST doc which can contain many ads. Therefore, always just take the first one.
var newAd = vast.Ad.FirstOrDefault(a => a.Item != null);
if (newAd == null)
{
OnError(ad, new Exception("Wrapped ad was empty"));
}
else if (newAd.Item is VASTADWrapper)
{
DownloadWrappedAd(Source, newAd, OnComplete, OnError);
}
else
{
// plug the ad back into the parent
OnComplete(newAd);
}
}
