private void Channel_DownloadCompleted(object sender, ItemsDownloadedEventArgs e)
{
TChannel CurrentChannel = sender as TChannel;
CurrentChannel.DownloadCompleted -= new EventHandler <ItemsDownloadedEventArgs>(Channel_DownloadCompleted);
Save();
if (DownloadCompleted != null)
{
ItemsDownloadedEventArgs Args = new ItemsDownloadedEventArgs(e.RawData, e.ResponseHeaders, e.Data);
DownloadCompleted(this, Args);
}
}
public void DownloadItems()
{
try {
Trace.WriteLine(string.Format("Downloading items for channel {0} ...", Title));
Trace.Indent();
WebClient CurrentClient = new WebClient();
CurrentClient.Headers.Add("user-agent", "RssWatcher/1.0");
byte[] Data = CurrentClient.DownloadData(Link.Value);
#region Discover the encoding
if (ChannelEncoding == null || string.IsNullOrWhiteSpace(ChannelEncoding.WebName))
{
string ContentType = CurrentClient.ResponseHeaders.Get("Content-Type");
string[] ContentTypeItems = ContentType.Split(';');
SplitArgs oArgs = new SplitArgs(ContentTypeItems);
ChannelEncoding = Encoding.GetEncoding(oArgs.GetValue <string>("charset", DefaultChannelEncoding));
}
Trace.WriteLine(string.Format("Encoding for {0} : {1}", Name, ChannelEncoding.WebName));
#endregion Discover the encoding
#region If content is gzipped, then decompress
string ContentEncoding = CurrentClient.ResponseHeaders.Get("Content-Encoding");
if (!string.IsNullOrWhiteSpace(ContentEncoding) && ContentEncoding.ToLower() == "gzip")
{
using (MemoryStream TempStream = new MemoryStream()) {
using (GZipStream CompressedStream = new GZipStream(new MemoryStream(Data), CompressionMode.Decompress)) {
CompressedStream.CopyTo(TempStream);
}
TempStream.Flush();
Data = new byte[TempStream.Length];
Buffer.BlockCopy(TempStream.GetBuffer(), 0, Data, 0, (int)TempStream.Length);
}
}
#endregion If content is gzipped, then decompress
#region Read and parse the data
XDocument SourceXml;
try {
#region Skip the BOM code if it exists
string TempXml = ChannelEncoding.GetString(Data);
if (TempXml.IndexOf('<') > 0)
{
TempXml = TempXml.Substring(TempXml.IndexOf("<"));
}
#endregion Skip the BOM code if it exists
SourceXml = XDocument.Parse(TempXml);
XElement XChannel = SourceXml.Element("rss").Element("channel");
TItemCollection TempItems = new TItemCollection(XChannel.Elements("item"));
DateTime TempLastBuildDate = LastBuildDate;
Trace.WriteLine(string.Format("Found {0} item(s)", TempItems.Count));
List <TItem> NewItems = TempItems.Where(i => i.PubDate > LastBuildDate).ToList();
Trace.WriteLine(string.Format("{0} new item(s)", NewItems.Count));
foreach (TItem ItemItem in NewItems)
{
if (ItemItem.PubDate > TempLastBuildDate)
{
TempLastBuildDate = ItemItem.PubDate;
}
Items.Add(ItemItem);
}
LastBuildDate = TempLastBuildDate;
Description = XChannel.SafeReadElementValue <string>("description", "");
if (XChannel.Elements().Any(x => x.Name == "image"))
{
Picture = new TChannelImage(XChannel.SafeReadElement("image"));
}
if (XChannel.Elements().Any(x => x.Name == "category"))
{
Category = XChannel.SafeReadElementValue <string>("category", "");
}
if (XChannel.Elements().Any(x => x.Name == "language"))
{
Language = XChannel.SafeReadElementValue <string>("language", "");
}
if (XChannel.Elements().Any(x => x.Name == "copyright"))
{
Copyright = XChannel.SafeReadElementValue <string>("copyright", "");
}
Title = XChannel.SafeReadElementValue <string>("title", "");
} catch (Exception ex) {
Trace.WriteLine(string.Format("Error while reading items for channel {0} : {1}", Name, ex.Message), Severity.Error);
}
#endregion Read and parse the data
if (DownloadCompleted != null)
{
ItemsDownloadedEventArgs Args = new ItemsDownloadedEventArgs(Data, CurrentClient.ResponseHeaders, Encoding.UTF8.GetString(Data));
DownloadCompleted(this, Args);
}
return;
} finally {
Trace.Unindent();
Trace.WriteLine("Done.");
}
}
