protected static bool TryParseBlogMLResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("blogML", "http://www.blogml.com/2006/09/BlogML");
version = null;
if ((navigator = resource.SelectSingleNode("blog", manager)) != null || (navigator = resource.SelectSingleNode("blogML:blog", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://www.blogml.com/2006/09/BlogML"))
{
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(2, 0);
}
}
}
return(resourceConformsToFormat);
}
protected static bool TryParseOpenSearchDescriptionResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("search", "http://a9.com/-/spec/opensearch/1.1/");
version = null;
if ((navigator = resource.SelectSingleNode("OpenSearchDescription", manager)) != null || (navigator = resource.SelectSingleNode("search:OpenSearchDescription", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://a9.com/-/spec/opensearch/1.1/"))
{
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(1, 1);
}
}
}
return(resourceConformsToFormat);
}
protected static bool TryParseRsdResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("rsd", "http://archipelago.phrasewise.com/rsd");
version = null;
if ((navigator = resource.SelectSingleNode("rsd", manager)) != null || (navigator = resource.SelectSingleNode("rsd:rsd", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://archipelago.phrasewise.com/rsd"))
{
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(1, 0);
}
}
else if (String.Compare(navigator.Name, "rsd", StringComparison.OrdinalIgnoreCase) == 0 && version != null)
{
// Most web log software actually fails to provide the default XML namespace per RSD spec, so this is a hack/compromise
resourceConformsToFormat = true;
}
}
return(resourceConformsToFormat);
}
protected static bool TryParseMicroSummaryGeneratorResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("micro", "http://www.mozilla.org/microsummaries/0.1");
version = null;
if ((navigator = resource.SelectSingleNode("generator", manager)) != null || (navigator = resource.SelectSingleNode("micro:generator", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://www.mozilla.org/microsummaries/0.1"))
{
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(0, 1);
}
}
}
return(resourceConformsToFormat);
}
protected static bool TryParseAtomPublishingServiceResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("atom", "http://www.w3.org/2005/Atom");
manager.AddNamespace("atom03", "http://purl.org/atom/ns#");
manager.AddNamespace("app", "http://www.w3.org/2007/app");
version = null;
if ((navigator = resource.SelectSingleNode("service", manager)) != null || (navigator = resource.SelectSingleNode("app:service", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://www.w3.org/2007/app"))
{
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(1, 0);
}
}
}
return(resourceConformsToFormat);
}
/// <summary>
/// Compares the current instance with another object of the same type.
/// </summary>
/// <param name="obj">An object to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>
/// <exception cref="ArgumentException">The <paramref name="obj"/> is not the expected <see cref="Type"/>.</exception>
public int CompareTo(object obj)
{
if (obj == null)
{
return(1);
}
SyndicationResourceMetadata value = obj as SyndicationResourceMetadata;
if (value != null)
{
int result = this.Format.CompareTo(value.Format);
if (this.Version != null)
{
result = result | this.Version.CompareTo(value.Version);
}
else if (value.Version != null)
{
result = result | -1;
}
if (this.Namespaces != null && value.Namespaces != null)
{
result = result | ComparisonUtility.CompareSequence(this.Namespaces, value.Namespaces, StringComparison.Ordinal);
}
else if (this.Namespaces != null && value.Namespaces == null)
{
result = result | 1;
}
else if (this.Namespaces == null && value.Namespaces != null)
{
result = result | -1;
}
if (this.Resource != null && value.Resource != null)
{
result = result | String.Compare(this.Resource.OuterXml, value.Resource.OuterXml, StringComparison.OrdinalIgnoreCase);
}
else if (this.Resource != null && value.Resource == null)
{
result = result | 1;
}
else if (this.Resource == null && value.Resource != null)
{
result = result | -1;
}
return(result);
}
else
{
throw new ArgumentException(String.Format(null, "obj is not of type {0}, type was found to be '{1}'.", this.GetType().FullName, obj.GetType().FullName), "obj");
}
}
protected static bool TryParseRssResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
XmlNamespaceManager manager = null;
Guard.ArgumentNotNull(resource, "resource");
manager = new XmlNamespaceManager(resource.NameTable);
manager.AddNamespace("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
manager.AddNamespace("rss09", "http://my.netscape.com/rdf/simple/0.9/");
manager.AddNamespace("rss10", "http://purl.org/rss/1.0/");
version = null;
if ((navigator = resource.SelectSingleNode("rss", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(2, 0);
}
}
else if ((navigator = resource.SelectSingleNode("rdf:RDF", manager)) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
Dictionary <string, string> namespaces = (Dictionary <string, string>)navigator.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
if (namespaces.ContainsValue("http://purl.org/rss/1.0/"))
{
resourceConformsToFormat = true;
version = new Version(1, 0);
}
else if (namespaces.ContainsValue("http://my.netscape.com/rdf/simple/0.9/"))
{
resourceConformsToFormat = true;
version = new Version(0, 9);
}
}
return(resourceConformsToFormat);
}
protected static bool TryParseOpmlResource(XPathNavigator resource, out XPathNavigator navigator, out Version version)
{
bool resourceConformsToFormat = false;
Guard.ArgumentNotNull(resource, "resource");
version = null;
if ((navigator = resource.SelectSingleNode("opml")) != null)
{
version = SyndicationResourceMetadata.GetVersionFromAttribute(navigator, "version");
resourceConformsToFormat = true;
if (version == null)
{
version = new Version(2, 0);
}
}
return(resourceConformsToFormat);
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Really Simple Syndication (RSS) <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillRssResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
RssFeed rssFeed = resource as RssFeed;
if (resourceMetadata.Version == new Version("2.0"))
{
Rss20SyndicationResourceAdapter rss20Adapter = new Rss20SyndicationResourceAdapter(this.Navigator, this.Settings);
rss20Adapter.Fill(rssFeed);
}
if (resourceMetadata.Version == new Version("1.0"))
{
Rss10SyndicationResourceAdapter rss10Adapter = new Rss10SyndicationResourceAdapter(this.Navigator, this.Settings);
rss10Adapter.Fill(rssFeed);
}
if (resourceMetadata.Version == new Version("0.92"))
{
Rss092SyndicationResourceAdapter rss092Adapter = new Rss092SyndicationResourceAdapter(this.Navigator, this.Settings);
rss092Adapter.Fill(rssFeed);
}
if (resourceMetadata.Version == new Version("0.91"))
{
Rss091SyndicationResourceAdapter rss091Adapter = new Rss091SyndicationResourceAdapter(this.Navigator, this.Settings);
rss091Adapter.Fill(rssFeed);
}
if (resourceMetadata.Version == new Version("0.9"))
{
Rss090SyndicationResourceAdapter rss090Adapter = new Rss090SyndicationResourceAdapter(this.Navigator, this.Settings);
rss090Adapter.Fill(rssFeed);
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Really Simple Discovery (RSD) <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillRsdResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
RsdDocument rsdDocument = resource as RsdDocument;
if (resourceMetadata.Version == new Version("1.0"))
{
Rsd10SyndicationResourceAdapter rsd10Adapter = new Rsd10SyndicationResourceAdapter(this.Navigator, this.Settings);
rsd10Adapter.Fill(rsdDocument);
}
if (resourceMetadata.Version == new Version("0.6"))
{
Rsd06SyndicationResourceAdapter rsd06Adapter = new Rsd06SyndicationResourceAdapter(this.Navigator, this.Settings);
rsd06Adapter.Fill(rsdDocument);
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Outline Processor Markup Language (OPML) <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillOpmlResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
OpmlDocument opmlDocument = resource as OpmlDocument;
Opml20SyndicationResourceAdapter opml20Adapter = new Opml20SyndicationResourceAdapter(this.Navigator, this.Settings);
if (resourceMetadata.Version == new Version("2.0"))
{
opml20Adapter.Fill(opmlDocument);
}
if (resourceMetadata.Version == new Version("1.1"))
{
opml20Adapter.Fill(opmlDocument);
}
if (resourceMetadata.Version == new Version("1.0"))
{
opml20Adapter.Fill(opmlDocument);
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The BlogML <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillBlogMLResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
BlogMLDocument blogMLDocument = resource as BlogMLDocument;
BlogML20SyndicationResourceAdapter blogML20Adapter = new BlogML20SyndicationResourceAdapter(this.Navigator, this.Settings);
if (resourceMetadata.Version == new Version("2.0"))
{
blogML20Adapter.Fill(blogMLDocument);
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Atom <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillAtomResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
AtomFeed atomFeed = resource as AtomFeed;
AtomEntry atomEntry = resource as AtomEntry;
if (resourceMetadata.Version == new Version("1.0"))
{
Atom10SyndicationResourceAdapter atom10Adapter = new Atom10SyndicationResourceAdapter(this.Navigator, this.Settings);
if (atomFeed != null)
{
atom10Adapter.Fill(atomFeed);
}
else if (atomEntry != null)
{
atom10Adapter.Fill(atomEntry);
}
}
if (resourceMetadata.Version == new Version("0.3"))
{
Atom03SyndicationResourceAdapter atom03Adapter = new Atom03SyndicationResourceAdapter(this.Navigator, this.Settings);
if (atomFeed != null)
{
atom03Adapter.Fill(atomFeed);
}
else if (atomEntry != null)
{
atom03Adapter.Fill(atomEntry);
}
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Atom Publishing Protocol <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillAtomPublishingResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
AtomCategoryDocument categoryDocument = resource as AtomCategoryDocument;
AtomServiceDocument serviceDocument = resource as AtomServiceDocument;
if (resourceMetadata.Version == new Version("1.0"))
{
AtomPublishing10SyndicationResourceAdapter atomPublishing10Adapter = new AtomPublishing10SyndicationResourceAdapter(this.Navigator, this.Settings);
if (categoryDocument != null)
{
atomPublishing10Adapter.Fill(categoryDocument);
}
else if (serviceDocument != null)
{
atomPublishing10Adapter.Fill(serviceDocument);
}
}
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The Attention Profiling Markup Language (APML) <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="resourceMetadata">A <see cref="SyndicationResourceMetadata"/> object that represents the meta-data describing the <paramref name="resource"/>.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="resourceMetadata"/> is a null reference (Nothing in Visual Basic).</exception>
private void FillApmlResource(ISyndicationResource resource, SyndicationResourceMetadata resourceMetadata)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
Guard.ArgumentNotNull(resourceMetadata, "resourceMetadata");
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
ApmlDocument apmlDocument = resource as ApmlDocument;
if (resourceMetadata.Version == new Version("0.6"))
{
Apml06SyndicationResourceAdapter apml06Adapter = new Apml06SyndicationResourceAdapter(this.Navigator, this.Settings);
apml06Adapter.Fill(apmlDocument);
}
}
/// <summary>
/// Called when a corresponding asynchronous load operation completes.
/// </summary>
/// <param name="result">The result of the asynchronous operation.</param>
private static void AsyncLoadCallback(IAsyncResult result)
{
//------------------------------------------------------------
// Local members
//------------------------------------------------------------
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
XPathNavigator navigator = null;
WebRequest httpWebRequest = null;
GenericSyndicationFeed feed = null;
Uri source = null;
WebRequestOptions options = null;
SyndicationResourceLoadSettings settings = null;
//------------------------------------------------------------
// Determine if the async send operation completed
//------------------------------------------------------------
if (result.IsCompleted)
{
//------------------------------------------------------------
// Extract the send operations parameters from the user state
//------------------------------------------------------------
object[] parameters = (object[])result.AsyncState;
httpWebRequest = parameters[0] as WebRequest;
feed = parameters[1] as GenericSyndicationFeed;
source = parameters[2] as Uri;
settings = parameters[3] as SyndicationResourceLoadSettings;
options = parameters[4] as WebRequestOptions;
object userToken = parameters[5];
//------------------------------------------------------------
// Verify expected parameters were found
//------------------------------------------------------------
if (feed != null)
{
//------------------------------------------------------------
// Get the response to the syndication resource request
//------------------------------------------------------------
WebResponse httpWebResponse = (WebResponse)httpWebRequest.EndGetResponse(result);
//------------------------------------------------------------
// Load syndication resource
//------------------------------------------------------------
using (Stream stream = httpWebResponse.GetResponseStream())
{
if (settings != null)
{
encoding = settings.CharacterEncoding;
}
using (StreamReader streamReader = new StreamReader(stream, encoding))
{
XmlReaderSettings readerSettings = new XmlReaderSettings();
readerSettings.IgnoreComments = true;
readerSettings.IgnoreWhitespace = true;
readerSettings.ProhibitDtd = false;
using (XmlReader reader = XmlReader.Create(streamReader, readerSettings))
{
if (encoding == System.Text.Encoding.UTF8)
{
navigator = SyndicationEncodingUtility.CreateSafeNavigator(source, options, null);
}
else
{
navigator = SyndicationEncodingUtility.CreateSafeNavigator(source, options, settings.CharacterEncoding);
}
//------------------------------------------------------------
// Initialize generic feed based on syndication resource format
//------------------------------------------------------------
SyndicationResourceMetadata metadata = new SyndicationResourceMetadata(navigator);
if (metadata.Format == SyndicationContentFormat.Atom)
{
AtomFeed atomFeed = new AtomFeed();
SyndicationResourceAdapter adapter = new SyndicationResourceAdapter(navigator, settings);
adapter.Fill(atomFeed, SyndicationContentFormat.Atom);
feed.Parse(atomFeed);
}
else if (metadata.Format == SyndicationContentFormat.Rss)
{
RssFeed rssFeed = new RssFeed();
SyndicationResourceAdapter adapter = new SyndicationResourceAdapter(navigator, settings);
adapter.Fill(rssFeed, SyndicationContentFormat.Rss);
feed.Parse(rssFeed);
}
//------------------------------------------------------------
// Raise Loaded event to notify registered handlers of state change
//------------------------------------------------------------
feed.OnFeedLoaded(new SyndicationResourceLoadedEventArgs(navigator, source, options, userToken));
}
}
}
//------------------------------------------------------------
// Reset load operation in progress indicator
//------------------------------------------------------------
feed.LoadOperationInProgress = false;
}
}
}
/// <summary>
/// Extracts the content format, version, and XML namespaces for a syndication resource from the supplied <see cref="XPathNavigator"/>.
/// </summary>
/// <param name="resource">The <see cref="XPathNavigator"/> to extract the syndication resource meta-data from.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
private void Load(XPathNavigator resource)
{
XPathNavigator navigator = null;
Version version = null;
Guard.ArgumentNotNull(resource, "resource");
Dictionary <string, string> namespaces = (Dictionary <string, string>)resource.GetNamespacesInScope(XmlNamespaceScope.ExcludeXml);
foreach (string prefix in namespaces.Keys)
{
resourceNamespaces.Add(prefix, namespaces[prefix]);
}
resourceVersion = SyndicationResourceMetadata.GetVersionFromAttribute(resource, "version");
if (SyndicationResourceMetadata.TryParseApmlResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.Apml;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseAtomResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.Atom;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseAtomPublishingCategoriesResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.AtomCategoryDocument;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseAtomPublishingServiceResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.AtomServiceDocument;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseBlogMLResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.BlogML;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseMicroSummaryGeneratorResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.MicroSummaryGenerator;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseNewsMLResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.NewsML;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseOpenSearchDescriptionResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.OpenSearchDescription;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseOpmlResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.Opml;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseRsdResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.Rsd;
resourceRootNode = navigator;
resourceVersion = version;
}
else if (SyndicationResourceMetadata.TryParseRssResource(resource, out navigator, out version))
{
resourceFormat = SyndicationContentFormat.Rss;
resourceRootNode = navigator;
resourceVersion = version;
}
else
{
resourceFormat = SyndicationContentFormat.None;
resourceRootNode = null;
resourceVersion = null;
}
}
/// <summary>
/// Loads the generic syndication feed using the specified <see cref="XPathNavigator"/> and <see cref="SyndicationResourceLoadSettings"/>.
/// </summary>
/// <param name="navigator">A read-only <see cref="XPathNavigator"/> object for navigating through the syndication resource information.</param>
/// <param name="settings">The <see cref="SyndicationResourceLoadSettings"/> object used to configure the load operation of the <see cref="GenericSyndicationFeed"/>.</param>
/// <param name="eventData">A <see cref="SyndicationResourceLoadedEventArgs"/> that contains the event data used when raising the <see cref="GenericSyndicationFeed.Loaded"/> event.</param>
/// <remarks>
/// After the load operation has successfully completed, the <see cref="GenericSyndicationFeed.Loaded"/> event is raised using the specified <paramref name="eventData"/>.
/// </remarks>
/// <exception cref="ArgumentNullException">The <paramref name="navigator"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="settings"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException">The <paramref name="eventData"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="FormatException">The <paramref name="navigator"/> data does not conform to the expected syndication content format. In this case, the feed remains empty.</exception>
private void Load(XPathNavigator navigator, SyndicationResourceLoadSettings settings, SyndicationResourceLoadedEventArgs eventData)
{
//------------------------------------------------------------
// Validate parameters
//------------------------------------------------------------
Guard.ArgumentNotNull(navigator, "navigator");
Guard.ArgumentNotNull(settings, "settings");
Guard.ArgumentNotNull(eventData, "eventData");
//------------------------------------------------------------
// Initialize generic feed based on syndication resource format
//------------------------------------------------------------
SyndicationResourceMetadata metadata = new SyndicationResourceMetadata(navigator);
if (metadata.Format == SyndicationContentFormat.Atom)
{
AtomFeed feed = new AtomFeed();
SyndicationResourceAdapter adapter = new SyndicationResourceAdapter(navigator, settings);
adapter.Fill(feed, SyndicationContentFormat.Atom);
this.Parse(feed);
}
else if (metadata.Format == SyndicationContentFormat.Rss)
{
RssFeed feed = new RssFeed();
SyndicationResourceAdapter adapter = new SyndicationResourceAdapter(navigator, settings);
adapter.Fill(feed, SyndicationContentFormat.Rss);
this.Parse(feed);
}
else if (metadata.Format == SyndicationContentFormat.Opml)
{
OpmlDocument opmlDoc = new OpmlDocument();
SyndicationResourceAdapter adapter = new SyndicationResourceAdapter(navigator, settings);
adapter.Fill(opmlDoc, SyndicationContentFormat.Opml);
this.Parse(opmlDoc);
}
//------------------------------------------------------------
// Raise Loaded event to notify registered handlers of state change
//------------------------------------------------------------
this.OnFeedLoaded(eventData);
}
/// <summary>
/// Modifies the <see cref="ISyndicationResource"/> to match the data source.
/// </summary>
/// <param name="resource">The <see cref="ISyndicationResource"/> to be filled.</param>
/// <param name="format">The <see cref="SyndicationContentFormat"/> enumeration value that indicates the type of syndication format that the <paramref name="resource"/> is expected to conform to.</param>
/// <exception cref="ArgumentNullException">The <paramref name="resource"/> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentException">The <paramref name="format"/> is equal to <see cref="SyndicationContentFormat.None"/>.</exception>
/// <exception cref="FormatException">The <paramref name="resource"/> data does not conform to the specified <paramref name="format"/>.</exception>
public void Fill(ISyndicationResource resource, SyndicationContentFormat format)
{
//------------------------------------------------------------
// Validate parameters
//------------------------------------------------------------
Guard.ArgumentNotNull(resource, "resource");
if (format == SyndicationContentFormat.None)
{
throw new ArgumentException(String.Format(null, "The specified syndication content format of {0} is invalid.", format), "format");
}
//------------------------------------------------------------
// Extract syndication resource meta-data
//------------------------------------------------------------
SyndicationResourceMetadata resourceMetadata = new SyndicationResourceMetadata(this.Navigator);
//------------------------------------------------------------
// Verify resource conforms to specified format
//------------------------------------------------------------
if (format != resourceMetadata.Format)
{
throw new FormatException(String.Format(null, "The supplied syndication resource has a content format of {0}, which does not match the expected content format of {1}.", resourceMetadata.Format, format));
}
//------------------------------------------------------------
// Fill syndication resource using appropriate data adapter
//------------------------------------------------------------
switch (format)
{
case SyndicationContentFormat.Apml:
this.FillApmlResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.Atom:
this.FillAtomResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.AtomCategoryDocument:
this.FillAtomPublishingResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.AtomServiceDocument:
this.FillAtomPublishingResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.BlogML:
this.FillBlogMLResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.Opml:
this.FillOpmlResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.Rsd:
this.FillRsdResource(resource, resourceMetadata);
break;
case SyndicationContentFormat.Rss:
this.FillRssResource(resource, resourceMetadata);
break;
}
}
