/// <summary>
/// Generates the OpenID Providers that are capable of asserting ownership
/// of a particular XRI claimed identifier.
/// </summary>
/// <param name="xrds">The XrdsDocument instance to use in this process.</param>
/// <param name="userSuppliedIdentifier">The i-name supplied by the user.</param>
/// <returns>A sequence of the providers that can assert ownership of the given identifier.</returns>
private static IEnumerable <IdentifierDiscoveryResult> GenerateClaimedIdentifierServiceEndpoints(this IEnumerable <XrdElement> xrds, XriIdentifier userSuppliedIdentifier)
{
// Cannot use code contracts because this method uses yield return.
////Contract.Requires<ArgumentNullException>(xrds != null);
////Contract.Ensures(Contract.Result<IEnumerable<IdentifierDiscoveryResult>>() != null);
ErrorUtilities.VerifyArgumentNotNull(xrds, "xrds");
foreach (var service in xrds.FindClaimedIdentifierServices())
{
foreach (var uri in service.UriElements)
{
// spec section 7.3.2.3 on Claimed Id -> CanonicalID substitution
if (service.Xrd.CanonicalID == null)
{
break; // skip on to next service
}
ErrorUtilities.VerifyProtocol(service.Xrd.IsCanonicalIdVerified, XrdsStrings.CIDVerificationFailed, userSuppliedIdentifier);
// In the case of XRI names, the ClaimedId is actually the CanonicalID.
var claimedIdentifier = new XriIdentifier(service.Xrd.CanonicalID);
var providerEndpoint = new ProviderEndpointDescription(uri.Uri, service.TypeElementUris);
yield return(IdentifierDiscoveryResult.CreateForClaimedIdentifier(claimedIdentifier, userSuppliedIdentifier, service.ProviderLocalIdentifier, providerEndpoint, service.Priority, uri.Priority));
}
}
}
public static Identifier Parse(string identifier)
{
if (XriIdentifier.IsValidXri(identifier))
{
return(new XriIdentifier(identifier));
}
else
{
return(new UriIdentifier(identifier));
}
}
/// <summary>
/// Tests equality between this XRI and another XRI.
/// </summary>
/// <param name="obj">The <see cref="T:System.Object"/> to compare with the current <see cref="T:System.Object"/>.</param>
/// <returns>
/// true if the specified <see cref="T:System.Object"/> is equal to the current <see cref="T:System.Object"/>; otherwise, false.
/// </returns>
/// <exception cref="T:System.NullReferenceException">
/// The <paramref name="obj"/> parameter is null.
/// </exception>
public override bool Equals(object obj)
{
XriIdentifier other = obj as XriIdentifier;
if (obj != null && other == null && Identifier.EqualityOnStrings)
{ // test hook to enable MockIdentifier comparison
string objString = obj.ToString();
ErrorUtilities.VerifyInternal(!string.IsNullOrEmpty(objString), "Identifier.ToString() returned a null or empty string.");
other = Identifier.Parse(objString) as XriIdentifier;
}
if (other == null)
{
return(false);
}
return(this.CanonicalXri == other.CanonicalXri);
}
/// <summary>
/// Creates the service endpoints described in this document, useful for requesting
/// authentication of one of the OpenID Providers that result from it.
/// </summary>
/// <param name="xrds">The XrdsDocument instance to use in this process.</param>
/// <param name="userSuppliedIdentifier">The user-supplied i-name that was used to discover this XRDS document.</param>
/// <returns>A sequence of OpenID Providers that can assert ownership of the canonical ID given in this document.</returns>
internal static IEnumerable <IdentifierDiscoveryResult> CreateServiceEndpoints(this IEnumerable <XrdElement> xrds, XriIdentifier userSuppliedIdentifier)
{
var endpoints = new List <IdentifierDiscoveryResult>();
endpoints.AddRange(xrds.GenerateOPIdentifierServiceEndpoints(userSuppliedIdentifier));
endpoints.AddRange(xrds.GenerateClaimedIdentifierServiceEndpoints(userSuppliedIdentifier));
return(endpoints);
}
public static bool IsValid(string identifier)
{
return(XriIdentifier.IsValidXri(identifier) || UriIdentifier.IsValidUri(identifier));
}
