/// <summary>
/// Converts the atom to RSS.
/// </summary>
/// <param name="documentType">Rss Document Type</param>
/// <param name="inputXml">The input XML.</param>
/// <returns>string</returns>
public static string ConvertRssTo(DocumentType ouputType, string rssXml)
{
if (string.IsNullOrEmpty(rssXml))
{
return(null);
}
switch (ouputType)
{
case DocumentType.Rss:
return(rssXml);
case DocumentType.Atom:
using (Stream stream = GetStreamFromResource(Constants.RssToAtomXsl))
{
return(RssXmlHelper.DoXslTransform(rssXml, stream));
}
case DocumentType.Rdf:
using (Stream stream = GetStreamFromResource(Constants.RssToRdfXsl))
{
return(RssXmlHelper.DoXslTransform(rssXml, stream));
}
case DocumentType.Opml:
using (Stream stream = GetStreamFromResource(Constants.RssToOpmlXsl))
{
return(RssXmlHelper.DoXslTransform(rssXml, stream));
}
default:
return(null);
}
}
private void GetRssFeeds(object state)
{
OutlineInfo outline = null;
try
{
outline = (OutlineInfo)state;
string xmlString = string.Empty;
using (Stream rssStream = DownloadManager.GetFeed(outline.Outline.XmlUrl))
{
using (XmlTextReader reader = new XmlTextReader(rssStream))
{
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
xmlString = reader.ReadOuterXml();
break;
}
}
}
}
////convert to rss
xmlString = RssXmlHelper.ConvertToRssXml(xmlString);
if (!string.IsNullOrEmpty(xmlString))
{
RssXmlSchemaValidator validator = new RssXmlSchemaValidator();
Assembly assembly = Assembly.GetExecutingAssembly();
using (Stream stream = assembly.GetManifestResourceStream(Constants.Rss20Xsd))
{
lock (aggregateRss)
{
validator.ValidXmlDoc(xmlString, new XmlTextReader(stream));
if (validator.IsValidXml)
{
aggregateRss.Add(xmlString);
}
}
if (!validator.IsValidXml)
{
NotifySubscribers(null, "Rss not valid in OPML for - " + outline.Outline.XmlUrl, RssSeverityType.Warning);
}
}
}
}
catch (Exception ex)
{
NotifySubscribers(ex, ex.Message, RssSeverityType.Error);
}
finally
{
rssEvents[outline.Index].Set();
}
}
private static T LoadFromRssXml <T>(string rssXml) where T : RssDocumentBase
{
if (string.IsNullOrEmpty(rssXml))
{
throw new ArgumentException("xml");
}
T rss = RssXmlHelper.DeserializeFromXmlUsingStringReader <T>(rssXml);
return(rss);
}
private static T LoadFromRssXml <T>(string rssXml) where T : RssDocumentBase
{
if (string.IsNullOrEmpty(rssXml))
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "The argument '{0}' is Null or Empty", "xml"));
}
T rss = RssXmlHelper.DeserializeFromXmlUsingStringReader <T>(rssXml);
return(rss);
}
private static T LoadFromRssXml <T>(string rssXml) where T : RssDocumentBase
{
if (string.IsNullOrEmpty(rssXml))
{
throw new ArgumentException(string.Format(Resources.RssToolkit.Culture, Resources.RssToolkit.ArgmentException, "xml"));
}
T rss = RssXmlHelper.DeserializeFromXmlUsingStringReader <T>(rssXml);
return(rss);
}
protected static T Load <T>(XmlReader reader) where T : RssDocumentBase
{
T rss = null;
string rssXml = RssXmlHelper.ConvertToRssXml(reader);
if (!string.IsNullOrEmpty(rssXml))
{
rss = LoadFromRssXml <T>(rssXml);
}
return(rss);
}
/// <summary>
/// Converts to RSS XML.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns>Xml string in Rss Format</returns>
public static string ConvertToRssXml(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
string rssXml = string.Empty;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
DocumentType feedType = RssXmlHelper.GetDocumentType(reader.LocalName);
string outerXml = reader.ReadOuterXml();
switch (feedType)
{
case DocumentType.Rss:
rssXml = outerXml;
break;
case DocumentType.Opml:
RssAggregator aggregator = new RssAggregator();
aggregator.Load(outerXml);
rssXml = aggregator.RssXml;
break;
case DocumentType.Atom:
rssXml = DoXslTransform(outerXml, GetStreamFromResource(Constants.AtomToRssXsl));
break;
case DocumentType.Rdf:
rssXml = DoXslTransform(outerXml, GetStreamFromResource(Constants.RdfToRssXsl));
break;
}
break;
}
}
// fix namespaces
if (reader.NameTable.Get("http://search.yahoo.com/mrss") != null)
{
rssXml = rssXml.Replace("http://search.yahoo.com/mrss", "http://search.yahoo.com/mrss/");
}
return(rssXml);
}
public static T LoadRssFromOpmlUrl <T>(string url) where T : RssDocumentBase
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "The argument '{0}' is Null or Empty", "url"));
}
// resolve app-relative URLs
url = RssXmlHelper.ResolveAppRelativeLinkToUrl(url);
RssAggregator aggregator = new RssAggregator();
aggregator.Load(new System.Uri(url));
string rssXml = aggregator.RssXml;
return(RssXmlHelper.DeserializeFromXmlUsingStringReader <T>(rssXml));
}
/// <summary>
/// Converts to RSS XML.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns>Xml string in Rss Format</returns>
public static string ConvertToRssXml(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
string rssXml = string.Empty;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
DocumentType feedType = RssXmlHelper.GetDocumentType(reader.LocalName);
string outerXml = reader.ReadOuterXml();
switch (feedType)
{
case DocumentType.Rss:
rssXml = outerXml;
break;
case DocumentType.Opml:
throw new NotImplementedException();
//RssAggregator aggregator = new RssAggregator();
//aggregator.Load(outerXml);
//rssXml = aggregator.RssXml;
//break;
case DocumentType.Atom:
//rssXml = DoXslTransform(outerXml, GetStreamFromResource(Constants.AtomToRssXsl));
break;
case DocumentType.Rdf:
//rssXml = DoXslTransform(outerXml, GetStreamFromResource(Constants.RdfToRssXsl));
break;
}
break;
}
}
return(rssXml);
}
protected static T Load <T>(System.Uri url) where T : RssDocumentBase
{
if (url == null)
{
throw new ArgumentNullException("url");
}
// resolve app-relative URLs
string rssUrl = RssXmlHelper.ResolveAppRelativeLinkToUrl(url.ToString());
// download the feed
using (Stream cachedXml = DownloadManager.GetFeed(rssUrl))
{
using (XmlTextReader reader = new XmlTextReader(cachedXml))
{
T rss = Load <T>(reader);
//// remember the url
rss.Url = rssUrl;
return(rss);
}
}
}
/// <summary>
/// Coverts to DataSet
/// </summary>
/// <returns>DataSet</returns>
public DataSet ToDataSet()
{
return(RssXmlHelper.ToDataSet(ToXml(DocumentType.Rss)));
}
private void MergeRss(string title)
{
string emptyXml = string.Format(
CultureInfo.InvariantCulture,
@"<?xml version=""1.0"" encoding=""utf-8""?><rss version=""2.0""><channel>{0}</channel></rss>",
string.IsNullOrEmpty(title) ? string.Empty : "<title>" + title + "</title>");
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(emptyXml);
try
{
foreach (string inputXml in aggregateRss)
{
XmlNodeList nodes;
XmlDocument rssDocument = new XmlDocument();
XmlNode channelNode = xmlDocument.SelectSingleNode("rss/channel");
if (!string.IsNullOrEmpty(inputXml) && channelNode != null)
{
rssDocument.LoadXml(inputXml);
nodes = rssDocument.SelectNodes("rss/channel/item");
SortedList <string, XmlElement> nodesList = new SortedList <string, XmlElement>();
foreach (XmlElement node in nodes)
{
DateTime date = DateTime.MinValue;
try
{
XmlNodeList pubDates = node.GetElementsByTagName("pubDate");
if (pubDates.Count > 0)
{
XmlNode pubDate = pubDates[0];
date = RssXmlHelper.Parse(pubDate.InnerText);
}
}
catch (Exception ex)
{
NotifySubscribers(ex, ex.Message, RssSeverityType.Warning);
}
////add to list, it will sort by the date
try
{
string key = String.Format(
System.Globalization.CultureInfo.InvariantCulture,
"{0}_{1}",
date.ToString("u", System.Globalization.CultureInfo.InvariantCulture),
node.ChildNodes[0].InnerText);
nodesList.Add(key, node);
}
catch (ArgumentException argumentException)
{
NotifySubscribers(argumentException, argumentException.Message, RssSeverityType.Warning);
}
}
foreach (string key in nodesList.Keys)
{
channelNode.AppendChild(xmlDocument.ImportNode(nodesList[key], true));
}
}
}
}
catch (Exception ex)
{
NotifySubscribers(ex, ex.Message, RssSeverityType.Error);
}
_rssXml = xmlDocument.OuterXml;
}
/// <summary>
/// string XML representation.
/// </summary>
/// <returns>string</returns>
protected static string ToXml <T>(DocumentType outputType, T rssDocument) where T : RssDocumentBase
{
string rssXml = RssXmlHelper.ToRssXml <T>(rssDocument);
return(RssXmlHelper.ConvertRssTo(outputType, rssXml));
}
