/// <summary>
/// Determines whether the URL of the current node is a canonical node.
/// </summary>
/// <param name="node">The node</param>
/// <returns><c>true</c> if the node's URL is canonical; otherwise<c>false</c>.</returns>
protected virtual bool IsCanonicalUrl(ISiteMapNode node, HttpContextBase context)
{
var canonicalUrl = node.CanonicalUrl;
if (string.IsNullOrEmpty(canonicalUrl))
{
return(true);
}
string absoluteUrl = string.Empty;
if (string.IsNullOrEmpty(node.Protocol) && string.IsNullOrEmpty(node.HostName))
{
var mvcContextFactory = new MvcContextFactory();
// Use the HTTP protocol to force an absolute URL to compare with if no protocol was provided.
var protocol = string.IsNullOrEmpty(node.Protocol) ? Uri.UriSchemeHttp : node.Protocol;
// Create a URI with the home page and no query string values.
var uri = new Uri(context.Request.Url, "/");
// Create a TextWriter with null stream as a backing stream
// which doesn't consume resources
using (var nullWriter = new StreamWriter(Stream.Null))
{
var newContext = mvcContextFactory.CreateHttpContext(node, uri, nullWriter);
absoluteUrl = this.urlPath.ResolveUrl(node.Url, protocol, node.HostName, newContext);
}
}
else
{
absoluteUrl = node.Url;
}
return(absoluteUrl.Equals(node.CanonicalUrl, StringComparison.Ordinal) || absoluteUrl.Equals("#"));
}
/// <summary>
/// Determines whether the URL of the current node is a canonical node.
/// </summary>
/// <param name="node">The node</param>
/// <returns><c>true</c> if the node's URL is canonical; otherwise<c>false</c>.</returns>
protected virtual bool IsCanonicalUrl(ISiteMapNode node, HttpContextBase context)
{
var canonicalUrl = node.CanonicalUrl;
if (string.IsNullOrEmpty(canonicalUrl))
{
return true;
}
string absoluteUrl = string.Empty;
if (string.IsNullOrEmpty(node.Protocol) && string.IsNullOrEmpty(node.HostName))
{
var mvcContextFactory = new MvcContextFactory();
// Use the HTTP protocol to force an absolute URL to compare with if no protocol was provided.
var protocol = string.IsNullOrEmpty(node.Protocol) ? Uri.UriSchemeHttp : node.Protocol;
// Create a URI with the home page and no query string values.
var uri = new Uri(context.Request.Url, "/");
// Create a TextWriter with null stream as a backing stream
// which doesn't consume resources
using (var nullWriter = new StreamWriter(Stream.Null))
{
var newContext = mvcContextFactory.CreateHttpContext(node, uri, nullWriter);
absoluteUrl = this.urlPath.ResolveUrl(node.Url, protocol, node.HostName, newContext);
}
}
else
{
absoluteUrl = node.Url;
}
return absoluteUrl.Equals(node.CanonicalUrl, StringComparison.Ordinal) || absoluteUrl.Equals("#");
}
